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-rw-r--r--sys/vm/tlsf.c1264
-rw-r--r--sys/vm/vm_device.c119
-rw-r--r--sys/vm/vm_dynalloc.c93
-rw-r--r--sys/vm/vm_fault.c132
-rw-r--r--sys/vm/vm_init.c91
-rw-r--r--sys/vm/vm_map.c540
-rw-r--r--sys/vm/vm_obj.c93
-rw-r--r--sys/vm/vm_page.c73
-rw-r--r--sys/vm/vm_pager.c68
-rw-r--r--sys/vm/vm_physseg.c272
-rw-r--r--sys/vm/vm_stat.c42
-rw-r--r--sys/vm/vm_vnode.c114
12 files changed, 0 insertions, 2901 deletions
diff --git a/sys/vm/tlsf.c b/sys/vm/tlsf.c
deleted file mode 100644
index d4a6ddf..0000000
--- a/sys/vm/tlsf.c
+++ /dev/null
@@ -1,1264 +0,0 @@
-#include <sys/syslog.h>
-#include <sys/types.h>
-#include <assert.h>
-#include <limits.h>
-#include <string.h>
-#include <vm/tlsf.h>
-
-#define printf kprintf
-
-#if defined(__cplusplus)
-#define tlsf_decl inline
-#else
-#define tlsf_decl static
-#endif
-
-/*
-** Architecture-specific bit manipulation routines.
-**
-** TLSF achieves O(1) cost for malloc and free operations by limiting
-** the search for a free block to a free list of guaranteed size
-** adequate to fulfill the request, combined with efficient free list
-** queries using bitmasks and architecture-specific bit-manipulation
-** routines.
-**
-** Most modern processors provide instructions to count leading zeroes
-** in a word, find the lowest and highest set bit, etc. These
-** specific implementations will be used when available, falling back
-** to a reasonably efficient generic implementation.
-**
-** NOTE: TLSF spec relies on ffs/fls returning value 0..31.
-** ffs/fls return 1-32 by default, returning 0 for error.
-*/
-
-/*
-** Detect whether or not we are building for a 32- or 64-bit (LP/LLP)
-** architecture. There is no reliable portable method at compile-time.
-*/
-#if defined (__alpha__) || defined (__ia64__) || defined (__x86_64__) \
- || defined (_WIN64) || defined (__LP64__) || defined (__LLP64__)
-#define TLSF_64BIT
-#endif
-
-/*
-** gcc 3.4 and above have builtin support, specialized for architecture.
-** Some compilers masquerade as gcc; patchlevel test filters them out.
-*/
-#if defined (__GNUC__) && (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)) \
- && defined (__GNUC_PATCHLEVEL__)
-
-#if defined (__SNC__)
-/* SNC for Playstation 3. */
-
-tlsf_decl int tlsf_ffs(unsigned int word)
-{
- const unsigned int reverse = word & (~word + 1);
- const int bit = 32 - __builtin_clz(reverse);
- return bit - 1;
-}
-
-#else
-
-tlsf_decl int tlsf_ffs(unsigned int word)
-{
- return __builtin_ffs(word) - 1;
-}
-
-#endif
-
-tlsf_decl int tlsf_fls(unsigned int word)
-{
- const int bit = word ? 32 - __builtin_clz(word) : 0;
- return bit - 1;
-}
-
-#elif defined (_MSC_VER) && (_MSC_VER >= 1400) && (defined (_M_IX86) || defined (_M_X64))
-/* Microsoft Visual C++ support on x86/X64 architectures. */
-
-#include <intrin.h>
-
-#pragma intrinsic(_BitScanReverse)
-#pragma intrinsic(_BitScanForward)
-
-tlsf_decl int tlsf_fls(unsigned int word)
-{
- unsigned long index;
- return _BitScanReverse(&index, word) ? index : -1;
-}
-
-tlsf_decl int tlsf_ffs(unsigned int word)
-{
- unsigned long index;
- return _BitScanForward(&index, word) ? index : -1;
-}
-
-#elif defined (_MSC_VER) && defined (_M_PPC)
-/* Microsoft Visual C++ support on PowerPC architectures. */
-
-#include <ppcintrinsics.h>
-
-tlsf_decl int tlsf_fls(unsigned int word)
-{
- const int bit = 32 - _CountLeadingZeros(word);
- return bit - 1;
-}
-
-tlsf_decl int tlsf_ffs(unsigned int word)
-{
- const unsigned int reverse = word & (~word + 1);
- const int bit = 32 - _CountLeadingZeros(reverse);
- return bit - 1;
-}
-
-#elif defined (__ARMCC_VERSION)
-/* RealView Compilation Tools for ARM */
-
-tlsf_decl int tlsf_ffs(unsigned int word)
-{
- const unsigned int reverse = word & (~word + 1);
- const int bit = 32 - __clz(reverse);
- return bit - 1;
-}
-
-tlsf_decl int tlsf_fls(unsigned int word)
-{
- const int bit = word ? 32 - __clz(word) : 0;
- return bit - 1;
-}
-
-#elif defined (__ghs__)
-/* Green Hills support for PowerPC */
-
-#include <ppc_ghs.h>
-
-tlsf_decl int tlsf_ffs(unsigned int word)
-{
- const unsigned int reverse = word & (~word + 1);
- const int bit = 32 - __CLZ32(reverse);
- return bit - 1;
-}
-
-tlsf_decl int tlsf_fls(unsigned int word)
-{
- const int bit = word ? 32 - __CLZ32(word) : 0;
- return bit - 1;
-}
-
-#else
-/* Fall back to generic implementation. */
-
-tlsf_decl int tlsf_fls_generic(unsigned int word)
-{
- int bit = 32;
-
- if (!word) bit -= 1;
- if (!(word & 0xffff0000)) { word <<= 16; bit -= 16; }
- if (!(word & 0xff000000)) { word <<= 8; bit -= 8; }
- if (!(word & 0xf0000000)) { word <<= 4; bit -= 4; }
- if (!(word & 0xc0000000)) { word <<= 2; bit -= 2; }
- if (!(word & 0x80000000)) { word <<= 1; bit -= 1; }
-
- return bit;
-}
-
-/* Implement ffs in terms of fls. */
-tlsf_decl int tlsf_ffs(unsigned int word)
-{
- return tlsf_fls_generic(word & (~word + 1)) - 1;
-}
-
-tlsf_decl int tlsf_fls(unsigned int word)
-{
- return tlsf_fls_generic(word) - 1;
-}
-
-#endif
-
-/* Possibly 64-bit version of tlsf_fls. */
-#if defined (TLSF_64BIT)
-tlsf_decl int tlsf_fls_sizet(size_t size)
-{
- int high = (int)(size >> 32);
- int bits = 0;
- if (high)
- {
- bits = 32 + tlsf_fls(high);
- }
- else
- {
- bits = tlsf_fls((int)size & 0xffffffff);
-
- }
- return bits;
-}
-#else
-#define tlsf_fls_sizet tlsf_fls
-#endif
-
-#undef tlsf_decl
-
-/*
-** Constants.
-*/
-
-/* Public constants: may be modified. */
-enum tlsf_public
-{
- /* log2 of number of linear subdivisions of block sizes. Larger
- ** values require more memory in the control structure. Values of
- ** 4 or 5 are typical.
- */
- SL_INDEX_COUNT_LOG2 = 5,
-};
-
-/* Private constants: do not modify. */
-enum tlsf_private
-{
-#if defined (TLSF_64BIT)
- /* All allocation sizes and addresses are aligned to 8 bytes. */
- ALIGN_SIZE_LOG2 = 3,
-#else
- /* All allocation sizes and addresses are aligned to 4 bytes. */
- ALIGN_SIZE_LOG2 = 2,
-#endif
- ALIGN_SIZE = (1 << ALIGN_SIZE_LOG2),
-
- /*
- ** We support allocations of sizes up to (1 << FL_INDEX_MAX) bits.
- ** However, because we linearly subdivide the second-level lists, and
- ** our minimum size granularity is 4 bytes, it doesn't make sense to
- ** create first-level lists for sizes smaller than SL_INDEX_COUNT * 4,
- ** or (1 << (SL_INDEX_COUNT_LOG2 + 2)) bytes, as there we will be
- ** trying to split size ranges into more slots than we have available.
- ** Instead, we calculate the minimum threshold size, and place all
- ** blocks below that size into the 0th first-level list.
- */
-
-#if defined (TLSF_64BIT)
- /*
- ** TODO: We can increase this to support larger sizes, at the expense
- ** of more overhead in the TLSF structure.
- */
- FL_INDEX_MAX = 32,
-#else
- FL_INDEX_MAX = 30,
-#endif
- SL_INDEX_COUNT = (1 << SL_INDEX_COUNT_LOG2),
- FL_INDEX_SHIFT = (SL_INDEX_COUNT_LOG2 + ALIGN_SIZE_LOG2),
- FL_INDEX_COUNT = (FL_INDEX_MAX - FL_INDEX_SHIFT + 1),
-
- SMALL_BLOCK_SIZE = (1 << FL_INDEX_SHIFT),
-};
-
-/*
-** Cast and min/max macros.
-*/
-
-#define tlsf_cast(t, exp) ((t) (exp))
-#define tlsf_min(a, b) ((a) < (b) ? (a) : (b))
-#define tlsf_max(a, b) ((a) > (b) ? (a) : (b))
-
-/*
-** Set assert macro, if it has not been provided by the user.
-*/
-#if !defined (tlsf_assert)
-#define tlsf_assert __assert
-#endif
-
-/*
-** Static assertion mechanism.
-*/
-
-#define _tlsf_glue2(x, y) x ## y
-#define _tlsf_glue(x, y) _tlsf_glue2(x, y)
-#define tlsf_static_assert(exp) \
- typedef char _tlsf_glue(static_assert, __LINE__) [(exp) ? 1 : -1]
-
-/* This code has been tested on 32- and 64-bit (LP/LLP) architectures. */
-tlsf_static_assert(sizeof(int) * CHAR_BIT == 32);
-tlsf_static_assert(sizeof(size_t) * CHAR_BIT >= 32);
-tlsf_static_assert(sizeof(size_t) * CHAR_BIT <= 64);
-
-/* SL_INDEX_COUNT must be <= number of bits in sl_bitmap's storage type. */
-tlsf_static_assert(sizeof(unsigned int) * CHAR_BIT >= SL_INDEX_COUNT);
-
-/* Ensure we've properly tuned our sizes. */
-tlsf_static_assert(ALIGN_SIZE == SMALL_BLOCK_SIZE / SL_INDEX_COUNT);
-
-/*
-** Data structures and associated constants.
-*/
-
-/*
-** Block header structure.
-**
-** There are several implementation subtleties involved:
-** - The prev_phys_block field is only valid if the previous block is free.
-** - The prev_phys_block field is actually stored at the end of the
-** previous block. It appears at the beginning of this structure only to
-** simplify the implementation.
-** - The next_free / prev_free fields are only valid if the block is free.
-*/
-typedef struct block_header_t
-{
- /* Points to the previous physical block. */
- struct block_header_t* prev_phys_block;
-
- /* The size of this block, excluding the block header. */
- size_t size;
-
- /* Next and previous free blocks. */
- struct block_header_t* next_free;
- struct block_header_t* prev_free;
-} block_header_t;
-
-/*
-** Since block sizes are always at least a multiple of 4, the two least
-** significant bits of the size field are used to store the block status:
-** - bit 0: whether block is busy or free
-** - bit 1: whether previous block is busy or free
-*/
-static const size_t block_header_free_bit = 1 << 0;
-static const size_t block_header_prev_free_bit = 1 << 1;
-
-/*
-** The size of the block header exposed to used blocks is the size field.
-** The prev_phys_block field is stored *inside* the previous free block.
-*/
-static const size_t block_header_overhead = sizeof(size_t);
-
-/* User data starts directly after the size field in a used block. */
-static const size_t block_start_offset =
- offsetof(block_header_t, size) + sizeof(size_t);
-
-/*
-** A free block must be large enough to store its header minus the size of
-** the prev_phys_block field, and no larger than the number of addressable
-** bits for FL_INDEX.
-*/
-static const size_t block_size_min =
- sizeof(block_header_t) - sizeof(block_header_t*);
-static const size_t block_size_max = tlsf_cast(size_t, 1) << FL_INDEX_MAX;
-
-
-/* The TLSF control structure. */
-typedef struct control_t
-{
- /* Empty lists point at this block to indicate they are free. */
- block_header_t block_null;
-
- /* Bitmaps for free lists. */
- unsigned int fl_bitmap;
- unsigned int sl_bitmap[FL_INDEX_COUNT];
-
- /* Head of free lists. */
- block_header_t* blocks[FL_INDEX_COUNT][SL_INDEX_COUNT];
-} control_t;
-
-/* A type used for casting when doing pointer arithmetic. */
-typedef ptrdiff_t tlsfptr_t;
-
-/*
-** block_header_t member functions.
-*/
-
-static size_t block_size(const block_header_t* block)
-{
- return block->size & ~(block_header_free_bit | block_header_prev_free_bit);
-}
-
-static void block_set_size(block_header_t* block, size_t size)
-{
- const size_t oldsize = block->size;
- block->size = size | (oldsize & (block_header_free_bit | block_header_prev_free_bit));
-}
-
-static int block_is_last(const block_header_t* block)
-{
- return block_size(block) == 0;
-}
-
-static int block_is_free(const block_header_t* block)
-{
- return tlsf_cast(int, block->size & block_header_free_bit);
-}
-
-static void block_set_free(block_header_t* block)
-{
- block->size |= block_header_free_bit;
-}
-
-static void block_set_used(block_header_t* block)
-{
- block->size &= ~block_header_free_bit;
-}
-
-static int block_is_prev_free(const block_header_t* block)
-{
- return tlsf_cast(int, block->size & block_header_prev_free_bit);
-}
-
-static void block_set_prev_free(block_header_t* block)
-{
- block->size |= block_header_prev_free_bit;
-}
-
-static void block_set_prev_used(block_header_t* block)
-{
- block->size &= ~block_header_prev_free_bit;
-}
-
-static block_header_t* block_from_ptr(const void* ptr)
-{
- return tlsf_cast(block_header_t*,
- tlsf_cast(unsigned char*, ptr) - block_start_offset);
-}
-
-static void* block_to_ptr(const block_header_t* block)
-{
- return tlsf_cast(void*,
- tlsf_cast(unsigned char*, block) + block_start_offset);
-}
-
-/* Return location of next block after block of given size. */
-static block_header_t* offset_to_block(const void* ptr, size_t size)
-{
- return tlsf_cast(block_header_t*, tlsf_cast(tlsfptr_t, ptr) + size);
-}
-
-/* Return location of previous block. */
-static block_header_t* block_prev(const block_header_t* block)
-{
- tlsf_assert(block_is_prev_free(block) && "previous block must be free");
- return block->prev_phys_block;
-}
-
-/* Return location of next existing block. */
-static block_header_t* block_next(const block_header_t* block)
-{
- block_header_t* next = offset_to_block(block_to_ptr(block),
- block_size(block) - block_header_overhead);
- tlsf_assert(!block_is_last(block));
- return next;
-}
-
-/* Link a new block with its physical neighbor, return the neighbor. */
-static block_header_t* block_link_next(block_header_t* block)
-{
- block_header_t* next = block_next(block);
- next->prev_phys_block = block;
- return next;
-}
-
-static void block_mark_as_free(block_header_t* block)
-{
- /* Link the block to the next block, first. */
- block_header_t* next = block_link_next(block);
- block_set_prev_free(next);
- block_set_free(block);
-}
-
-static void block_mark_as_used(block_header_t* block)
-{
- block_header_t* next = block_next(block);
- block_set_prev_used(next);
- block_set_used(block);
-}
-
-static size_t align_up(size_t x, size_t align)
-{
- tlsf_assert(0 == (align & (align - 1)) && "must align to a power of two");
- return (x + (align - 1)) & ~(align - 1);
-}
-
-static size_t align_down(size_t x, size_t align)
-{
- tlsf_assert(0 == (align & (align - 1)) && "must align to a power of two");
- return x - (x & (align - 1));
-}
-
-static void* align_ptr(const void* ptr, size_t align)
-{
- const tlsfptr_t aligned =
- (tlsf_cast(tlsfptr_t, ptr) + (align - 1)) & ~(align - 1);
- tlsf_assert(0 == (align & (align - 1)) && "must align to a power of two");
- return tlsf_cast(void*, aligned);
-}
-
-/*
-** Adjust an allocation size to be aligned to word size, and no smaller
-** than internal minimum.
-*/
-static size_t adjust_request_size(size_t size, size_t align)
-{
- size_t adjust = 0;
- if (size)
- {
- const size_t aligned = align_up(size, align);
-
- /* aligned sized must not exceed block_size_max or we'll go out of bounds on sl_bitmap */
- if (aligned < block_size_max)
- {
- adjust = tlsf_max(aligned, block_size_min);
- }
- }
- return adjust;
-}
-
-/*
-** TLSF utility functions. In most cases, these are direct translations of
-** the documentation found in the white paper.
-*/
-
-static void mapping_insert(size_t size, int* fli, int* sli)
-{
- int fl, sl;
- if (size < SMALL_BLOCK_SIZE)
- {
- /* Store small blocks in first list. */
- fl = 0;
- sl = tlsf_cast(int, size) / (SMALL_BLOCK_SIZE / SL_INDEX_COUNT);
- }
- else
- {
- fl = tlsf_fls_sizet(size);
- sl = tlsf_cast(int, size >> (fl - SL_INDEX_COUNT_LOG2)) ^ (1 << SL_INDEX_COUNT_LOG2);
- fl -= (FL_INDEX_SHIFT - 1);
- }
- *fli = fl;
- *sli = sl;
-}
-
-/* This version rounds up to the next block size (for allocations) */
-static void mapping_search(size_t size, int* fli, int* sli)
-{
- if (size >= SMALL_BLOCK_SIZE)
- {
- const size_t round = (1 << (tlsf_fls_sizet(size) - SL_INDEX_COUNT_LOG2)) - 1;
- size += round;
- }
- mapping_insert(size, fli, sli);
-}
-
-static block_header_t* search_suitable_block(control_t* control, int* fli, int* sli)
-{
- int fl = *fli;
- int sl = *sli;
-
- /*
- ** First, search for a block in the list associated with the given
- ** fl/sl index.
- */
- unsigned int sl_map = control->sl_bitmap[fl] & (~0U << sl);
- if (!sl_map)
- {
- /* No block exists. Search in the next largest first-level list. */
- const unsigned int fl_map = control->fl_bitmap & (~0U << (fl + 1));
- if (!fl_map)
- {
- /* No free blocks available, memory has been exhausted. */
- return 0;
- }
-
- fl = tlsf_ffs(fl_map);
- *fli = fl;
- sl_map = control->sl_bitmap[fl];
- }
- tlsf_assert(sl_map && "internal error - second level bitmap is null");
- sl = tlsf_ffs(sl_map);
- *sli = sl;
-
- /* Return the first block in the free list. */
- return control->blocks[fl][sl];
-}
-
-/* Remove a free block from the free list.*/
-static void remove_free_block(control_t* control, block_header_t* block, int fl, int sl)
-{
- block_header_t* prev = block->prev_free;
- block_header_t* next = block->next_free;
- tlsf_assert(prev && "prev_free field can not be null");
- tlsf_assert(next && "next_free field can not be null");
- next->prev_free = prev;
- prev->next_free = next;
-
- /* If this block is the head of the free list, set new head. */
- if (control->blocks[fl][sl] == block)
- {
- control->blocks[fl][sl] = next;
-
- /* If the new head is null, clear the bitmap. */
- if (next == &control->block_null)
- {
- control->sl_bitmap[fl] &= ~(1U << sl);
-
- /* If the second bitmap is now empty, clear the fl bitmap. */
- if (!control->sl_bitmap[fl])
- {
- control->fl_bitmap &= ~(1U << fl);
- }
- }
- }
-}
-
-/* Insert a free block into the free block list. */
-static void insert_free_block(control_t* control, block_header_t* block, int fl, int sl)
-{
- block_header_t* current = control->blocks[fl][sl];
- tlsf_assert(current && "free list cannot have a null entry");
- tlsf_assert(block && "cannot insert a null entry into the free list");
- block->next_free = current;
- block->prev_free = &control->block_null;
- current->prev_free = block;
-
- tlsf_assert((uintptr_t)block_to_ptr(block) == (uintptr_t)align_ptr(block_to_ptr(block), ALIGN_SIZE)
- && "block not aligned properly");
- /*
- ** Insert the new block at the head of the list, and mark the first-
- ** and second-level bitmaps appropriately.
- */
- control->blocks[fl][sl] = block;
- control->fl_bitmap |= (1U << fl);
- control->sl_bitmap[fl] |= (1U << sl);
-}
-
-/* Remove a given block from the free list. */
-static void block_remove(control_t* control, block_header_t* block)
-{
- int fl, sl;
- mapping_insert(block_size(block), &fl, &sl);
- remove_free_block(control, block, fl, sl);
-}
-
-/* Insert a given block into the free list. */
-static void block_insert(control_t* control, block_header_t* block)
-{
- int fl, sl;
- mapping_insert(block_size(block), &fl, &sl);
- insert_free_block(control, block, fl, sl);
-}
-
-static int block_can_split(block_header_t* block, size_t size)
-{
- return block_size(block) >= sizeof(block_header_t) + size;
-}
-
-/* Split a block into two, the second of which is free. */
-static block_header_t* block_split(block_header_t* block, size_t size)
-{
- /* Calculate the amount of space left in the remaining block. */
- block_header_t* remaining =
- offset_to_block(block_to_ptr(block), size - block_header_overhead);
-
- const size_t remain_size = block_size(block) - (size + block_header_overhead);
-
- tlsf_assert((uintptr_t)block_to_ptr(remaining) == (uintptr_t)align_ptr(block_to_ptr(remaining), ALIGN_SIZE)
- && "remaining block not aligned properly");
-
- tlsf_assert(block_size(block) == remain_size + size + block_header_overhead);
- block_set_size(remaining, remain_size);
- tlsf_assert(block_size(remaining) >= block_size_min && "block split with invalid size");
-
- block_set_size(block, size);
- block_mark_as_free(remaining);
-
- return remaining;
-}
-
-/* Absorb a free block's storage into an adjacent previous free block. */
-static block_header_t* block_absorb(block_header_t* prev, block_header_t* block)
-{
- tlsf_assert(!block_is_last(prev) && "previous block can't be last");
- /* Note: Leaves flags untouched. */
- prev->size += block_size(block) + block_header_overhead;
- block_link_next(prev);
- return prev;
-}
-
-/* Merge a just-freed block with an adjacent previous free block. */
-static block_header_t* block_merge_prev(control_t* control, block_header_t* block)
-{
- if (block_is_prev_free(block))
- {
- block_header_t* prev = block_prev(block);
- tlsf_assert(prev && "prev physical block can't be null");
- tlsf_assert(block_is_free(prev) && "prev block is not free though marked as such");
- block_remove(control, prev);
- block = block_absorb(prev, block);
- }
-
- return block;
-}
-
-/* Merge a just-freed block with an adjacent free block. */
-static block_header_t* block_merge_next(control_t* control, block_header_t* block)
-{
- block_header_t* next = block_next(block);
- tlsf_assert(next && "next physical block can't be null");
-
- if (block_is_free(next))
- {
- tlsf_assert(!block_is_last(block) && "previous block can't be last");
- block_remove(control, next);
- block = block_absorb(block, next);
- }
-
- return block;
-}
-
-/* Trim any trailing block space off the end of a block, return to pool. */
-static void block_trim_free(control_t* control, block_header_t* block, size_t size)
-{
- tlsf_assert(block_is_free(block) && "block must be free");
- if (block_can_split(block, size))
- {
- block_header_t* remaining_block = block_split(block, size);
- block_link_next(block);
- block_set_prev_free(remaining_block);
- block_insert(control, remaining_block);
- }
-}
-
-/* Trim any trailing block space off the end of a used block, return to pool. */
-static void block_trim_used(control_t* control, block_header_t* block, size_t size)
-{
- tlsf_assert(!block_is_free(block) && "block must be used");
- if (block_can_split(block, size))
- {
- /* If the next block is free, we must coalesce. */
- block_header_t* remaining_block = block_split(block, size);
- block_set_prev_used(remaining_block);
-
- remaining_block = block_merge_next(control, remaining_block);
- block_insert(control, remaining_block);
- }
-}
-
-static block_header_t* block_trim_free_leading(control_t* control, block_header_t* block, size_t size)
-{
- block_header_t* remaining_block = block;
- if (block_can_split(block, size))
- {
- /* We want the 2nd block. */
- remaining_block = block_split(block, size - block_header_overhead);
- block_set_prev_free(remaining_block);
-
- block_link_next(block);
- block_insert(control, block);
- }
-
- return remaining_block;
-}
-
-static block_header_t* block_locate_free(control_t* control, size_t size)
-{
- int fl = 0, sl = 0;
- block_header_t* block = 0;
-
- if (size)
- {
- mapping_search(size, &fl, &sl);
-
- /*
- ** mapping_search can futz with the size, so for excessively large sizes it can sometimes wind up
- ** with indices that are off the end of the block array.
- ** So, we protect against that here, since this is the only callsite of mapping_search.
- ** Note that we don't need to check sl, since it comes from a modulo operation that guarantees it's always in range.
- */
- if (fl < FL_INDEX_COUNT)
- {
- block = search_suitable_block(control, &fl, &sl);
- }
- }
-
- if (block)
- {
- tlsf_assert(block_size(block) >= size);
- remove_free_block(control, block, fl, sl);
- }
-
- return block;
-}
-
-static void* block_prepare_used(control_t* control, block_header_t* block, size_t size)
-{
- void* p = 0;
- if (block)
- {
- tlsf_assert(size && "size must be non-zero");
- block_trim_free(control, block, size);
- block_mark_as_used(block);
- p = block_to_ptr(block);
- }
- return p;
-}
-
-/* Clear structure and point all empty lists at the null block. */
-static void control_construct(control_t* control)
-{
- int i, j;
-
- control->block_null.next_free = &control->block_null;
- control->block_null.prev_free = &control->block_null;
-
- control->fl_bitmap = 0;
- for (i = 0; i < FL_INDEX_COUNT; ++i)
- {
- control->sl_bitmap[i] = 0;
- for (j = 0; j < SL_INDEX_COUNT; ++j)
- {
- control->blocks[i][j] = &control->block_null;
- }
- }
-}
-
-/*
-** Debugging utilities.
-*/
-
-typedef struct integrity_t
-{
- int prev_status;
- int status;
-} integrity_t;
-
-#define tlsf_insist(x) { tlsf_assert(x); if (!(x)) { status--; } }
-
-static void integrity_walker(void* ptr, size_t size, int used, void* user)
-{
- block_header_t* block = block_from_ptr(ptr);
- integrity_t* integ = tlsf_cast(integrity_t*, user);
- const int this_prev_status = block_is_prev_free(block) ? 1 : 0;
- const int this_status = block_is_free(block) ? 1 : 0;
- const size_t this_block_size = block_size(block);
-
- int status = 0;
- (void)used;
- tlsf_insist(integ->prev_status == this_prev_status && "prev status incorrect");
- tlsf_insist(size == this_block_size && "block size incorrect");
-
- integ->prev_status = this_status;
- integ->status += status;
-}
-
-int tlsf_check(tlsf_t tlsf)
-{
- int i, j;
-
- control_t* control = tlsf_cast(control_t*, tlsf);
- int status = 0;
-
- /* Check that the free lists and bitmaps are accurate. */
- for (i = 0; i < FL_INDEX_COUNT; ++i)
- {
- for (j = 0; j < SL_INDEX_COUNT; ++j)
- {
- const int fl_map = control->fl_bitmap & (1U << i);
- const int sl_list = control->sl_bitmap[i];
- const int sl_map = sl_list & (1U << j);
- const block_header_t* block = control->blocks[i][j];
-
- /* Check that first- and second-level lists agree. */
- if (!fl_map)
- {
- tlsf_insist(!sl_map && "second-level map must be null");
- }
-
- if (!sl_map)
- {
- tlsf_insist((uint64_t)block == (uint64_t)&control->block_null && "block list must be null");
- continue;
- }
-
- /* Check that there is at least one free block. */
- tlsf_insist(sl_list && "no free blocks in second-level map");
- tlsf_insist((uintptr_t)block != (uintptr_t)&control->block_null && "block should not be null");
-
- while (block != &control->block_null)
- {
- int fli, sli;
- tlsf_insist(block_is_free(block) && "block should be free");
- tlsf_insist(!block_is_prev_free(block) && "blocks should have coalesced");
- tlsf_insist(!block_is_free(block_next(block)) && "blocks should have coalesced");
- tlsf_insist(block_is_prev_free(block_next(block)) && "block should be free");
- tlsf_insist(block_size(block) >= block_size_min && "block not minimum size");
-
- mapping_insert(block_size(block), &fli, &sli);
- tlsf_insist(fli == i && sli == j && "block size indexed in wrong list");
- block = block->next_free;
- }
- }
- }
-
- return status;
-}
-
-#undef tlsf_insist
-
-static void default_walker(void* ptr, size_t size, int used, void* user)
-{
- (void)user;
- printf("\t%p %s size: %x (%p)\n", ptr, used ? "used" : "free", (unsigned int)size, block_from_ptr(ptr));
-}
-
-void tlsf_walk_pool(pool_t pool, tlsf_walker walker, void* user)
-{
- tlsf_walker pool_walker = walker ? walker : default_walker;
- block_header_t* block =
- offset_to_block(pool, -(int)block_header_overhead);
-
- while (block && !block_is_last(block))
- {
- pool_walker(
- block_to_ptr(block),
- block_size(block),
- !block_is_free(block),
- user);
- block = block_next(block);
- }
-}
-
-size_t tlsf_block_size(void* ptr)
-{
- size_t size = 0;
- if (ptr)
- {
- const block_header_t* block = block_from_ptr(ptr);
- size = block_size(block);
- }
- return size;
-}
-
-int tlsf_check_pool(pool_t pool)
-{
- /* Check that the blocks are physically correct. */
- integrity_t integ = { 0, 0 };
- tlsf_walk_pool(pool, integrity_walker, &integ);
-
- return integ.status;
-}
-
-/*
-** Size of the TLSF structures in a given memory block passed to
-** tlsf_create, equal to the size of a control_t
-*/
-size_t tlsf_size(void)
-{
- return sizeof(control_t);
-}
-
-size_t tlsf_align_size(void)
-{
- return ALIGN_SIZE;
-}
-
-size_t tlsf_block_size_min(void)
-{
- return block_size_min;
-}
-
-size_t tlsf_block_size_max(void)
-{
- return block_size_max;
-}
-
-/*
-** Overhead of the TLSF structures in a given memory block passed to
-** tlsf_add_pool, equal to the overhead of a free block and the
-** sentinel block.
-*/
-size_t tlsf_pool_overhead(void)
-{
- return 2 * block_header_overhead;
-}
-
-size_t tlsf_alloc_overhead(void)
-{
- return block_header_overhead;
-}
-
-pool_t tlsf_add_pool(tlsf_t tlsf, void* mem, size_t bytes)
-{
- block_header_t* block;
- block_header_t* next;
-
- const size_t pool_overhead = tlsf_pool_overhead();
- const size_t pool_bytes = align_down(bytes - pool_overhead, ALIGN_SIZE);
-
- if (((ptrdiff_t)mem % ALIGN_SIZE) != 0)
- {
- printf("tlsf_add_pool: Memory must be aligned by %u bytes.\n",
- (unsigned int)ALIGN_SIZE);
- return 0;
- }
-
- if (pool_bytes < block_size_min || pool_bytes > block_size_max)
- {
-#if defined (TLSF_64BIT)
- printf("tlsf_add_pool: Memory size must be between 0x%x and 0x%x00 bytes.\n",
- (unsigned int)(pool_overhead + block_size_min),
- (unsigned int)((pool_overhead + block_size_max) / 256));
-#else
- printf("tlsf_add_pool: Memory size must be between %u and %u bytes.\n",
- (unsigned int)(pool_overhead + block_size_min),
- (unsigned int)(pool_overhead + block_size_max));
-#endif
- return 0;
- }
-
- /*
- ** Create the main free block. Offset the start of the block slightly
- ** so that the prev_phys_block field falls outside of the pool -
- ** it will never be used.
- */
- block = offset_to_block(mem, -(tlsfptr_t)block_header_overhead);
- block_set_size(block, pool_bytes);
- block_set_free(block);
- block_set_prev_used(block);
- block_insert(tlsf_cast(control_t*, tlsf), block);
-
- /* Split the block to create a zero-size sentinel block. */
- next = block_link_next(block);
- block_set_size(next, 0);
- block_set_used(next);
- block_set_prev_free(next);
-
- return mem;
-}
-
-void tlsf_remove_pool(tlsf_t tlsf, pool_t pool)
-{
- control_t* control = tlsf_cast(control_t*, tlsf);
- block_header_t* block = offset_to_block(pool, -(int)block_header_overhead);
-
- int fl = 0, sl = 0;
-
- tlsf_assert(block_is_free(block) && "block should be free");
- tlsf_assert(!block_is_free(block_next(block)) && "next block should not be free");
- tlsf_assert(block_size(block_next(block)) == 0 && "next block size should be zero");
-
- mapping_insert(block_size(block), &fl, &sl);
- remove_free_block(control, block, fl, sl);
-}
-
-/*
-** TLSF main interface.
-*/
-
-#if _DEBUG
-int test_ffs_fls()
-{
- /* Verify ffs/fls work properly. */
- int rv = 0;
- rv += (tlsf_ffs(0) == -1) ? 0 : 0x1;
- rv += (tlsf_fls(0) == -1) ? 0 : 0x2;
- rv += (tlsf_ffs(1) == 0) ? 0 : 0x4;
- rv += (tlsf_fls(1) == 0) ? 0 : 0x8;
- rv += (tlsf_ffs(0x80000000) == 31) ? 0 : 0x10;
- rv += (tlsf_ffs(0x80008000) == 15) ? 0 : 0x20;
- rv += (tlsf_fls(0x80000008) == 31) ? 0 : 0x40;
- rv += (tlsf_fls(0x7FFFFFFF) == 30) ? 0 : 0x80;
-
-#if defined (TLSF_64BIT)
- rv += (tlsf_fls_sizet(0x80000000) == 31) ? 0 : 0x100;
- rv += (tlsf_fls_sizet(0x100000000) == 32) ? 0 : 0x200;
- rv += (tlsf_fls_sizet(0xffffffffffffffff) == 63) ? 0 : 0x400;
-#endif
-
- if (rv)
- {
- printf("test_ffs_fls: %x ffs/fls tests failed.\n", rv);
- }
- return rv;
-}
-#endif
-
-tlsf_t tlsf_create(void* mem)
-{
-#if _DEBUG
- if (test_ffs_fls())
- {
- return 0;
- }
-#endif
-
- if (((tlsfptr_t)mem % ALIGN_SIZE) != 0)
- {
- printf("tlsf_create: Memory must be aligned to %u bytes.\n",
- (unsigned int)ALIGN_SIZE);
- return 0;
- }
-
- control_construct(tlsf_cast(control_t*, mem));
-
- return tlsf_cast(tlsf_t, mem);
-}
-
-tlsf_t tlsf_create_with_pool(void* mem, size_t bytes)
-{
- tlsf_t tlsf = tlsf_create(mem);
- tlsf_add_pool(tlsf, (char*)mem + tlsf_size(), bytes - tlsf_size());
- return tlsf;
-}
-
-void tlsf_destroy(tlsf_t tlsf)
-{
- /* Nothing to do. */
- (void)tlsf;
-}
-
-pool_t tlsf_get_pool(tlsf_t tlsf)
-{
- return tlsf_cast(pool_t, (char*)tlsf + tlsf_size());
-}
-
-void* tlsf_malloc(tlsf_t tlsf, size_t size)
-{
- control_t* control = tlsf_cast(control_t*, tlsf);
- const size_t adjust = adjust_request_size(size, ALIGN_SIZE);
- block_header_t* block = block_locate_free(control, adjust);
- return block_prepare_used(control, block, adjust);
-}
-
-void* tlsf_memalign(tlsf_t tlsf, size_t align, size_t size)
-{
- control_t* control = tlsf_cast(control_t*, tlsf);
- const size_t adjust = adjust_request_size(size, ALIGN_SIZE);
-
- /*
- ** We must allocate an additional minimum block size bytes so that if
- ** our free block will leave an alignment gap which is smaller, we can
- ** trim a leading free block and release it back to the pool. We must
- ** do this because the previous physical block is in use, therefore
- ** the prev_phys_block field is not valid, and we can't simply adjust
- ** the size of that block.
- */
- const size_t gap_minimum = sizeof(block_header_t);
- const size_t size_with_gap = adjust_request_size(adjust + align + gap_minimum, align);
-
- /*
- ** If alignment is less than or equals base alignment, we're done.
- ** If we requested 0 bytes, return null, as tlsf_malloc(0) does.
- */
- const size_t aligned_size = (adjust && align > ALIGN_SIZE) ? size_with_gap : adjust;
-
- block_header_t* block = block_locate_free(control, aligned_size);
-
- /* This can't be a static assert. */
- tlsf_assert(sizeof(block_header_t) == block_size_min + block_header_overhead);
-
- if (block)
- {
- void* ptr = block_to_ptr(block);
- void* aligned = align_ptr(ptr, align);
- size_t gap = tlsf_cast(size_t,
- tlsf_cast(tlsfptr_t, aligned) - tlsf_cast(tlsfptr_t, ptr));
-
- /* If gap size is too small, offset to next aligned boundary. */
- if (gap && gap < gap_minimum)
- {
- const size_t gap_remain = gap_minimum - gap;
- const size_t offset = tlsf_max(gap_remain, align);
- const void* next_aligned = tlsf_cast(void*,
- tlsf_cast(tlsfptr_t, aligned) + offset);
-
- aligned = align_ptr(next_aligned, align);
- gap = tlsf_cast(size_t,
- tlsf_cast(tlsfptr_t, aligned) - tlsf_cast(tlsfptr_t, ptr));
- }
-
- if (gap)
- {
- tlsf_assert(gap >= gap_minimum && "gap size too small");
- block = block_trim_free_leading(control, block, gap);
- }
- }
-
- return block_prepare_used(control, block, adjust);
-}
-
-void tlsf_free(tlsf_t tlsf, void* ptr)
-{
- /* Don't attempt to free a NULL pointer. */
- if (ptr)
- {
- control_t* control = tlsf_cast(control_t*, tlsf);
- block_header_t* block = block_from_ptr(ptr);
- tlsf_assert(!block_is_free(block) && "block already marked as free");
- block_mark_as_free(block);
- block = block_merge_prev(control, block);
- block = block_merge_next(control, block);
- block_insert(control, block);
- }
-}
-
-/*
-** The TLSF block information provides us with enough information to
-** provide a reasonably intelligent implementation of realloc, growing or
-** shrinking the currently allocated block as required.
-**
-** This routine handles the somewhat esoteric edge cases of realloc:
-** - a non-zero size with a null pointer will behave like malloc
-** - a zero size with a non-null pointer will behave like free
-** - a request that cannot be satisfied will leave the original buffer
-** untouched
-** - an extended buffer size will leave the newly-allocated area with
-** contents undefined
-*/
-void* tlsf_realloc(tlsf_t tlsf, void* ptr, size_t size)
-{
- control_t* control = tlsf_cast(control_t*, tlsf);
- void* p = 0;
-
- /* Zero-size requests are treated as free. */
- if (ptr && size == 0)
- {
- tlsf_free(tlsf, ptr);
- }
- /* Requests with NULL pointers are treated as malloc. */
- else if (!ptr)
- {
- p = tlsf_malloc(tlsf, size);
- }
- else
- {
- block_header_t* block = block_from_ptr(ptr);
- block_header_t* next = block_next(block);
-
- const size_t cursize = block_size(block);
- const size_t combined = cursize + block_size(next) + block_header_overhead;
- const size_t adjust = adjust_request_size(size, ALIGN_SIZE);
-
- tlsf_assert(!block_is_free(block) && "block already marked as free");
-
- /*
- ** If the next block is used, or when combined with the current
- ** block, does not offer enough space, we must reallocate and copy.
- */
- if (adjust > cursize && (!block_is_free(next) || adjust > combined))
- {
- p = tlsf_malloc(tlsf, size);
- if (p)
- {
- const size_t minsize = tlsf_min(cursize, size);
- memcpy(p, ptr, minsize);
- tlsf_free(tlsf, ptr);
- }
- }
- else
- {
- /* Do we need to expand to the next block? */
- if (adjust > cursize)
- {
- block_merge_next(control, block);
- block_mark_as_used(block);
- }
-
- /* Trim the resulting block and return the original pointer. */
- block_trim_used(control, block, adjust);
- p = ptr;
- }
- }
-
- return p;
-}
diff --git a/sys/vm/vm_device.c b/sys/vm/vm_device.c
deleted file mode 100644
index 976dec7..0000000
--- a/sys/vm/vm_device.c
+++ /dev/null
@@ -1,119 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/types.h>
-#include <sys/errno.h>
-#include <sys/sio.h>
-#include <sys/vfs.h>
-#include <sys/cdefs.h>
-#include <fs/devfs.h>
-#include <vm/obj.h>
-#include <vm/vm.h>
-#include <vm/pager.h>
-
-static int dv_pager_get(struct vm_object *obj, off_t off, size_t len,
- struct vm_page *pg);
-
-static int dv_pager_store(struct vm_object *obj, off_t off, size_t len,
- struct vm_page *pg);
-
-static int dv_pager_paddr(struct vm_object *obj, paddr_t *paddr,
- vm_prot_t prot);
-
-/* Pager operations */
-struct vm_pagerops g_dev_pagerops = {
- .get = dv_pager_get,
- .store = dv_pager_store,
- .get_paddr = dv_pager_paddr
-};
-
-/*
- * Fetch a device descriptor from a memory
- * object.
- *
- * Returns 0 on success.
- */
-static int
-dv_get_dev(struct vm_object *obj, struct device **res)
-{
- struct device *dev;
- struct vnode *vp;
- int status;
-
- if ((vp = obj->vnode) == NULL)
- return -EIO;
-
- /* Now try to fetch the device */
- if ((status = devfs_get_dev(vp, &dev)) != 0)
- return status;
-
- *res = dev;
- return 0;
-}
-
-static int
-dv_pager_paddr(struct vm_object *obj, paddr_t *paddr, vm_prot_t prot)
-{
- struct device *dev;
- int status;
-
- if (paddr == NULL) {
- return -EINVAL;
- }
-
- /* Try to fetch the device */
- if ((status = dv_get_dev(obj, &dev)) != 0) {
- return status;
- }
-
- if (dev->mmap == NULL) {
- /*
- * mmap() is not supported, this is not an object
- * we can handle so try switching its operations
- * to the vnode pager ops...
- */
- obj->pgops = &g_vnode_pagerops;
- return -ENOTSUP;
- }
-
- *paddr = dev->mmap(dev, 0, prot);
- return 0;
-}
-
-static int
-dv_pager_store(struct vm_object *obj, off_t off, size_t len, struct vm_page *pg)
-{
- return -1;
-}
-
-static int
-dv_pager_get(struct vm_object *obj, off_t off, size_t len, struct vm_page *pg)
-{
- return -1;
-}
diff --git a/sys/vm/vm_dynalloc.c b/sys/vm/vm_dynalloc.c
deleted file mode 100644
index dea4460..0000000
--- a/sys/vm/vm_dynalloc.c
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <vm/dynalloc.h>
-#include <vm/vm.h>
-
-/*
- * Dynamically allocates memory
- *
- * @sz: The amount of bytes to allocate
- */
-void *
-dynalloc(size_t sz)
-{
- struct vm_ctx *vm_ctx = vm_get_ctx();
- void *tmp;
-
- spinlock_acquire(&vm_ctx->dynalloc_lock);
- tmp = tlsf_malloc(vm_ctx->tlsf_ctx, sz);
- spinlock_release(&vm_ctx->dynalloc_lock);
- return tmp;
-}
-
-void *
-dynalloc_memalign(size_t sz, size_t align)
-{
- struct vm_ctx *vm_ctx = vm_get_ctx();
- void *tmp;
-
- spinlock_acquire(&vm_ctx->dynalloc_lock);
- tmp = tlsf_memalign(vm_ctx->tlsf_ctx, align, sz);
- spinlock_release(&vm_ctx->dynalloc_lock);
- return tmp;
-}
-
-/*
- * Reallocates memory pool created by `dynalloc()'
- *
- * @old_ptr: Pointer to old pool.
- * @newsize: Size of new pool.
- */
-void *
-dynrealloc(void *old_ptr, size_t newsize)
-{
- struct vm_ctx *vm_ctx = vm_get_ctx();
- void *tmp;
-
- spinlock_acquire(&vm_ctx->dynalloc_lock);
- tmp = tlsf_realloc(vm_ctx->tlsf_ctx, old_ptr, newsize);
- spinlock_release(&vm_ctx->dynalloc_lock);
- return tmp;
-}
-
-/*
- * Free dynamically allocated memory
- *
- * @ptr: Pointer to base of memory.
- */
-void
-dynfree(void *ptr)
-{
- struct vm_ctx *vm_ctx = vm_get_ctx();
-
- spinlock_acquire(&vm_ctx->dynalloc_lock);
- tlsf_free(vm_ctx->tlsf_ctx, ptr);
- spinlock_release(&vm_ctx->dynalloc_lock);
-}
diff --git a/sys/vm/vm_fault.c b/sys/vm/vm_fault.c
deleted file mode 100644
index 45def7f..0000000
--- a/sys/vm/vm_fault.c
+++ /dev/null
@@ -1,132 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/types.h>
-#include <sys/sched.h>
-#include <vm/fault.h>
-#include <vm/map.h>
-#include <vm/pmap.h>
-#include <vm/vm.h>
-#include <vm/physseg.h>
-
-static struct vm_mapping *
-vm_mapq_search(vm_mapq_t *mq, vaddr_t addr)
-{
- struct vm_mapping *mapping;
- const struct vm_range *range;
-
- TAILQ_FOREACH(mapping, mq, link) {
- range = &mapping->range;
- if (addr >= range->start && addr <= range->end) {
- return mapping;
- }
- }
-
- return NULL;
-}
-
-static struct vm_mapping *
-vm_find_mapping(vaddr_t addr)
-{
- struct vm_mapping *mapping;
- struct proc *td = this_td();
- vm_mapq_t *mapq;
-
- mapping = vm_mapping_fetch(&td->mapspace, addr);
- if (mapping != NULL)
- return mapping;
-
- /* Need to search other maps */
- for (size_t i = 0; i < MTAB_ENTRIES; ++i) {
- mapq = &td->mapspace.mtab[i];
- mapping = vm_mapq_search(mapq, addr);
- if (mapping != NULL)
- return mapping;
- }
-
- return NULL;
-}
-
-static int
-vm_demand_page(struct vm_mapping *mapping, vaddr_t va, vm_prot_t access_type)
-{
- struct proc *td;
- paddr_t pa_base;
-
- int s;
- size_t granule = vm_get_page_size();
-
- /* Allocate physical memory if needed */
- if (mapping->physmem_base == 0) {
- pa_base = vm_alloc_pageframe(1);
- mapping->physmem_base = pa_base;
- } else {
- pa_base = mapping->physmem_base;
- }
-
- td = this_td();
- s = vm_map_create(td->addrsp, va, pa_base, access_type, granule);
- return s;
-}
-
-int
-vm_fault(vaddr_t va, vm_prot_t access_type)
-{
- struct vm_mapping *mapping;
- struct vm_object *vmobj;
-
- int s = 0;
- size_t granule = vm_get_page_size();
- vaddr_t va_base = va & ~(granule - 1);
-
- mapping = vm_find_mapping(va_base);
- if (mapping == NULL)
- return -1;
-
- if ((vmobj = mapping->vmobj) == NULL)
- /* Virtual memory object non-existent */
- return -1;
- if ((access_type & ~mapping->prot) != 0)
- /* Invalid access type */
- return -1;
-
- vm_object_ref(vmobj);
-
- /* Can we perform demand paging? */
- if (vmobj->demand) {
- s = vm_demand_page(mapping, va_base, access_type);
- if (s != 0)
- goto done;
- }
-
-done:
- /* Drop the vmobj ref */
- vm_object_unref(vmobj);
- return s;
-}
diff --git a/sys/vm/vm_init.c b/sys/vm/vm_init.c
deleted file mode 100644
index 3087e6e..0000000
--- a/sys/vm/vm_init.c
+++ /dev/null
@@ -1,91 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <vm/vm.h>
-#include <vm/physseg.h>
-#include <vm/pmap.h>
-#include <sys/panic.h>
-#include <assert.h>
-
-/*
- * XXX: As of now, these are constant... It would be nice if we could
- * have this value expanded upon request so we can keep it small
- * to not hog up resources. Would make it more flexible too :^)
- */
-#define DYNALLOC_POOL_SZ 0x400000 /* 4 MiB */
-#define DYNALLOC_POOL_PAGES (DYNALLOC_POOL_SZ / vm_get_page_size())
-
-static volatile struct vas kernel_vas;
-
-/*
- * TODO: Move this to a per CPU structure, this kinda sucks
- * how it is right now...
- */
-static struct vm_ctx bsp_vm_ctx = {0};
-
-volatile struct limine_hhdm_request g_hhdm_request = {
- .id = LIMINE_HHDM_REQUEST,
- .revision = 0
-};
-
-struct vm_ctx *
-vm_get_ctx(void)
-{
- return &bsp_vm_ctx;
-}
-
-/*
- * Return the kernel VAS.
- */
-struct vas
-vm_get_kvas(void)
-{
- return kernel_vas;
-}
-
-void
-vm_init(void)
-{
- void *pool_va;
-
- kernel_vas = pmap_read_vas();
- if (pmap_init(vm_get_ctx()) != 0) {
- panic("Failed to init pmap layer\n");
- }
-
- /* Setup virtual memory context */
- bsp_vm_ctx.dynalloc_pool_sz = DYNALLOC_POOL_SZ;
- bsp_vm_ctx.dynalloc_pool_phys = vm_alloc_pageframe(DYNALLOC_POOL_PAGES);
- if (bsp_vm_ctx.dynalloc_pool_phys == 0) {
- panic("Failed to allocate dynamic pool\n");
- }
- pool_va = PHYS_TO_VIRT(bsp_vm_ctx.dynalloc_pool_phys);
- bsp_vm_ctx.tlsf_ctx = tlsf_create_with_pool(pool_va, DYNALLOC_POOL_SZ);
- __assert(bsp_vm_ctx.tlsf_ctx != 0);
-}
diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c
deleted file mode 100644
index ca1d18a..0000000
--- a/sys/vm/vm_map.c
+++ /dev/null
@@ -1,540 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <vm/map.h>
-#include <vm/vm.h>
-#include <vm/pmap.h>
-#include <vm/physseg.h>
-#include <vm/dynalloc.h>
-#include <vm/pager.h>
-#include <sys/types.h>
-#include <sys/filedesc.h>
-#include <sys/cdefs.h>
-#include <sys/panic.h>
-#include <sys/sched.h>
-#include <lib/assert.h>
-
-#define ALLOC_MAPPING() dynalloc(sizeof(struct vm_mapping))
-#define DESTROY_MAPPING(MAPPING) dynfree(MAPPING)
-#define MMAP_DEFAULT_OFF 0x3000000
-
-static size_t
-vm_hash_vaddr(vaddr_t va) {
- va = (va ^ (va >> 30)) * (size_t)0xBF58476D1CE4E5B9;
- va = (va ^ (va >> 27)) * (size_t)0x94D049BB133111EB;
- va = va ^ (va >> 31);
- return va;
-}
-
-/*
- * Fetches a suitable offset to be added to an
- * address that will be mapped with mmap() to
- * avoid clobbering the address space.
- */
-static uintptr_t
-vm_get_mapoff(struct proc *td)
-{
- /*
- * FIXME: For now we are adding a fixed offset to the
- * address to be mapped.
- *
- * It would be best to ensure that it isn't in
- * range of the process *just in case*.
- */
- (void)td;
- return MMAP_DEFAULT_OFF;
-}
-
-/*
- * Destroy a map queue.
- */
-void
-vm_free_mapq(vm_mapq_t *mapq)
-{
- struct vm_mapping *map;
- size_t map_pages, granule;
-
- granule = vm_get_page_size();
- TAILQ_FOREACH(map, mapq, link) {
- map_pages = (map->range.end - map->range.start) / granule;
- vm_free_pageframe(map->range.start, map_pages);
- }
- dynfree(map);
-}
-
-/*
- * Remove a mapping from a mapspace.
- *
- * @ms: Mapspace.
- * @mapping: Mapping to remove.
- */
-void
-vm_mapspace_remove(struct vm_mapspace *ms, struct vm_mapping *mapping)
-{
- size_t vhash;
- vm_mapq_t *mapq;
-
- if (ms == NULL)
- return;
-
- vhash = vm_hash_vaddr(mapping->range.start);
- mapq = &ms->mtab[vhash % MTAB_ENTRIES];
- TAILQ_REMOVE(mapq, mapping, link);
- --ms->map_count;
-}
-
-/*
- * Fetch a mapping from a mapspace.
- *
- * @ms: Mapspace.
- * @va: Virtual address.
- */
-struct vm_mapping *
-vm_mapping_fetch(struct vm_mapspace *ms, vaddr_t va)
-{
- size_t vhash;
- const vm_mapq_t *mapq;
- struct vm_mapping *map;
-
- if (ms == NULL)
- return NULL;
-
- vhash = vm_hash_vaddr(va);
- mapq = &ms->mtab[vhash % MTAB_ENTRIES];
-
- TAILQ_FOREACH(map, mapq, link) {
- if (map->vhash == vhash) {
- return map;
- }
- }
-
- return NULL;
-}
-
-/*
- * Insert a mapping into a mapspace.
- *
- * @ms: Target mapspace.
- * @mapping: Mapping to insert.
- */
-void
-vm_mapspace_insert(struct vm_mapspace *ms, struct vm_mapping *mapping)
-{
- size_t vhash;
- vm_mapq_t *q;
-
- if (mapping == NULL || ms == NULL)
- return;
-
- vhash = vm_hash_vaddr(mapping->range.start);
- mapping->vhash = vhash;
-
- q = &ms->mtab[vhash % MTAB_ENTRIES];
- TAILQ_INSERT_HEAD(q, mapping, link);
- ++ms->map_count;
-}
-
-/*
- * Create a mapping (internal helper)
- *
- * @addr: Address to map.
- * @physmem: Physical address, set to 0 to alloc one here
- * @prot: Protection flags.
- *
- * Returns zero on failure.
- */
-static paddr_t
-vm_map(void *addr, paddr_t physmem, vm_prot_t prot, size_t len)
-{
- struct proc *td = this_td();
- const size_t GRANULE = vm_get_page_size();
-
- int status;
-
- /* Allocate the physical memory if needed */
- if (physmem == 0)
- physmem = vm_alloc_pageframe(len / GRANULE);
-
- if (physmem == 0)
- return 0;
-
- /*
- * XXX: There is no need to worry about alignment yet
- * as vm_map_create() handles that internally.
- */
- prot |= PROT_USER;
- status = vm_map_create(td->addrsp, (vaddr_t)addr, physmem, prot, len);
- if (status != 0) {
- vm_free_pageframe(physmem, len / GRANULE);
- return 0;
- }
-
- return physmem;
-}
-
-/*
- * Create a mapping backed by a file.
- *
- * @addr: Address to map.
- * @prot: Protection flags.
- * @len: Length of mapping.
- * @off: Offset.
- * @fd: File descriptor.
- */
-static paddr_t
-vm_fd_map(void *addr, vm_prot_t prot, size_t len, off_t off, int fd,
- struct vm_mapping *mapping)
-{
- paddr_t physmem = 0;
-
- int oflag;
- struct filedesc *filedes;
- struct vnode *vp;
-
- struct proc *td = this_td();
- struct vm_page pg = {0};
-
- /* Attempt to get the vnode */
- filedes = fd_from_fdnum(td, fd);
- if (filedes == NULL)
- return 0;
- if ((vp = filedes->vnode) == NULL)
- return 0;
-
- /* Check the perms of the filedes */
- oflag = filedes->oflag;
- if (__TEST(prot, PROT_WRITE) && oflag == O_RDONLY)
- return 0;
- if (!__TEST(prot, PROT_WRITE) && oflag == O_WRONLY)
- return 0;
-
- /* Try to create the virtual memory object */
- if (vm_obj_init(&vp->vmobj, vp) != 0)
- return 0;
-
- mapping->vmobj = vp->vmobj;
- vm_object_ref(vp->vmobj);
-
- /* Try to fetch a physical address */
- if (vm_pager_paddr(vp->vmobj, &physmem, prot) != 0) {
- vm_obj_destroy(vp->vmobj);
- return 0;
- }
-
- /*
- * If the pager found a physical address for the object to
- * be mapped to, then we start off with an anonymous mapping
- * then connect it to the physical address (creates a shared mapping)
- */
- if (physmem != 0) {
- vm_map(addr, physmem, prot, len);
- return physmem;
- }
-
- /*
- * If the pager could not find a physical address for
- * the object to be mapped to, start of with just a plain
- * anonymous mapping then page-in from whatever filesystem
- * (creates a shared mapping)
- */
- physmem = vm_map(addr, 0, prot, len);
- pg.physaddr = physmem;
-
- if (vm_pager_get(vp->vmobj, off, len, &pg) != 0) {
- vm_obj_destroy(vp->vmobj);
- return 0;
- }
-
- return physmem;
-}
-
-static int
-munmap(void *addr, size_t len)
-{
- struct proc *td = this_td();
- struct vm_mapping *mapping;
- struct vm_object *obj;
-
- struct vm_mapspace *ms;
- size_t map_len, granule;
- vaddr_t map_start, map_end;
-
- ms = &td->mapspace;
-
- granule = vm_get_page_size();
- mapping = vm_mapping_fetch(ms, (vaddr_t)addr);
- if (mapping == NULL) {
- return -1;
- }
-
- spinlock_acquire(&td->mapspace_lock);
- map_start = mapping->range.start;
- map_end = mapping->range.end;
- map_len = map_end - map_start;
-
- /* Try to release any virtual memory objects */
- if ((obj = mapping->vmobj) != NULL) {
- /*
- * Drop our ref and try to cleanup. If the refcount
- * is > 0, something is still holding it and we can't
- * do much.
- */
- vm_object_unref(obj);
- if (obj->ref == 0) {
- vm_obj_destroy(obj);
- }
- }
-
- /* Release the mapping */
- vm_map_destroy(td->addrsp, map_start, map_len);
- vm_free_pageframe(mapping->range.start, map_len / granule);
-
- /* Destroy the mapping descriptor */
- vm_mapspace_remove(ms, mapping);
- dynfree(mapping);
- spinlock_release(&td->mapspace_lock);
- return 0;
-}
-
-static void *
-mmap(void *addr, size_t len, int prot, int flags, int fildes, off_t off)
-{
- const int PROT_MASK = PROT_WRITE | PROT_EXEC;
- const size_t GRANULE = vm_get_page_size();
- uintptr_t map_end, map_start;
-
- struct proc *td = this_td();
- struct vm_mapping *mapping;
- struct vm_object *vmobj;
-
- size_t misalign = ((vaddr_t)addr) & (GRANULE - 1);
- off_t mapoff = vm_get_mapoff(td);
-
- paddr_t physmem = 0;
- vaddr_t va = (vaddr_t)addr + mapoff;
-
- /* Ensure of valid prot flags */
- if ((prot & ~PROT_MASK) != 0)
- return MAP_FAILED;
-
- /* Try to allocate a mapping */
- mapping = ALLOC_MAPPING();
- if (mapping == NULL)
- return MAP_FAILED;
-
- /* Setup prot and mapping start */
- mapping->prot = prot | PROT_USER;
- map_start = __ALIGN_DOWN(va, GRANULE);
-
- /* Ensure the length is aligned */
- len = __ALIGN_UP(len + misalign, GRANULE);
-
- /*
- * Now we check what type of map request
- * this is.
- */
- if (__TEST(flags, MAP_ANONYMOUS)) {
- /* Try to create a virtual memory object */
- if (vm_obj_init(&vmobj, NULL) != 0)
- goto fail;
-
- /*
- * If 'addr' is NULL, we'll just allocate physical
- * memory right away.
- */
- if (addr == NULL)
- physmem = vm_alloc_pageframe(len / GRANULE);
-
- /*
- * Enable demand paging for this object if
- * `addr` is not NULL.
- */
- if (addr != NULL) {
- vmobj->is_anon = 1;
- vmobj->demand = 1;
-
- mapping->vmobj = vmobj;
- mapping->physmem_base = 0;
- } else if (addr == NULL && physmem != 0) {
- map_start = physmem + mapoff;
- vm_map((void *)map_start, physmem, prot, len);
- addr = (void *)physmem;
-
- vmobj->is_anon = 1;
- vmobj->demand = 0;
- mapping->vmobj = vmobj;
- mapping->physmem_base = physmem;
- }
-
- /* Did this work? */
- if (physmem == 0 && addr == NULL) {
- goto fail;
- }
- } else if (__TEST(flags, MAP_SHARED)) {
- physmem = vm_fd_map((void *)map_start, prot, len, off, fildes, mapping);
- if (physmem == 0) {
- goto fail;
- }
- }
-
- /* Setup map_end and map ranges */
- map_end = map_start + len;
- mapping->range.start = map_start;
- mapping->range.end = map_end;
- mapping->physmem_base = physmem;
-
- /* Add to mapspace */
- spinlock_acquire(&td->mapspace_lock);
- vm_mapspace_insert(&td->mapspace, mapping);
- spinlock_release(&td->mapspace_lock);
- return (void *)map_start;
-fail:
- DESTROY_MAPPING(mapping);
- return MAP_FAILED;
-}
-
-/*
- * Internal routine for cleaning up.
- *
- * @va: VA to start unmapping at.
- * @bytes_aligned: Amount of bytes to unmap.
- *
- * XXX DANGER!!: `bytes_aligned' is expected to be aligned by the
- * machine's page granule. If this is not so,
- * undefined behaviour will occur. This will
- * be enforced via a panic.
- */
-static void
-vm_map_cleanup(struct vas vas, struct vm_ctx *ctx, vaddr_t va,
- size_t bytes_aligned, size_t granule)
-{
- __assert(bytes_aligned != 0);
- __assert((bytes_aligned & (granule - 1)) == 0);
-
- for (size_t i = 0; i < bytes_aligned; i += 0x1000) {
- if (pmap_unmap(ctx, vas, va + i) != 0) {
- /*
- * XXX: This shouldn't happen... If it somehow does,
- * then this should be handled.
- */
- panic("Could not cleanup!!!\n");
- }
- }
-}
-
-/*
- * Create a virtual memory mappings in the current
- * address space.
- *
- * @va: Virtual address.
- * @pa: Physical address.
- * @prot: Protection flags.
- * @bytes: Amount of bytes to be mapped. This is aligned by the
- * machine's page granule, typically a 4k boundary.
- */
-int
-vm_map_create(struct vas vas, vaddr_t va, paddr_t pa, vm_prot_t prot, size_t bytes)
-{
- size_t granule = vm_get_page_size();
- size_t misalign = va & (granule - 1);
- int s;
-
- struct vm_ctx *ctx = vm_get_ctx();
-
- /*
- * The amount of bytes to be mapped should fully span pages,
- * so we ensure it is aligned by the page granularity.
- */
- bytes = __ALIGN_UP(bytes + misalign, granule);
-
- /* Align VA/PA by granule */
- va = __ALIGN_DOWN(va, granule);
- pa = __ALIGN_DOWN(pa, granule);
-
- if (bytes == 0) {
- /* You can't map 0 pages, silly! */
- return -1;
- }
-
- for (uintptr_t i = 0; i < bytes; i += granule) {
- s = pmap_map(ctx, vas, va + i, pa + i, prot);
- if (s != 0) {
- /* Something went a bit wrong here, cleanup */
- vm_map_cleanup(vas, ctx, va, i, bytes);
- return -1;
- }
- }
-
- return 0;
-}
-
-/*
- * Destroy a virtual memory mapping in the current
- * address space.
- */
-int
-vm_map_destroy(struct vas vas, vaddr_t va, size_t bytes)
-{
- struct vm_ctx *ctx = vm_get_ctx();
- size_t granule = vm_get_page_size();
- size_t misalign = va & (granule - 1);
- int s;
-
- /* We want bytes to be aligned by the granule */
- bytes = __ALIGN_UP(bytes + misalign, granule);
-
- /* Align VA by granule */
- va = __ALIGN_DOWN(va, granule);
-
- if (bytes == 0) {
- return -1;
- }
-
- for (uintptr_t i = 0; i < bytes; i += granule) {
- s = pmap_unmap(ctx, vas, va + i);
- if (s != 0) {
- return -1;
- }
- }
-
- return 0;
-}
-
-uint64_t
-sys_mmap(struct syscall_args *args)
-{
- return (uintptr_t)mmap((void *)args->arg0, args->arg1, args->arg2,
- args->arg3, args->arg4, args->arg5);
-}
-
-uint64_t
-sys_munmap(struct syscall_args *args)
-{
- return munmap((void *)args->arg0, args->arg1);
-}
diff --git a/sys/vm/vm_obj.c b/sys/vm/vm_obj.c
deleted file mode 100644
index b501c6b..0000000
--- a/sys/vm/vm_obj.c
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <vm/obj.h>
-#include <vm/dynalloc.h>
-#include <sys/errno.h>
-#include <string.h>
-
-static size_t obj_count = 0;
-
-static void
-vm_set_pgops(struct vm_object *obj, struct vnode *vnode)
-{
- if (vnode == NULL) {
- obj->vnode = NULL;
- return;
- }
-
- /* Is this a device? */
- if (vnode->type == VCHR || vnode->type == VBLK) {
- obj->pgops = &g_dev_pagerops;
- } else {
- obj->pgops = &g_vnode_pagerops;
- }
-}
-
-int
-vm_obj_init(struct vm_object **res, struct vnode *vnode)
-{
- struct vm_object *obj = dynalloc(sizeof(struct vm_object));
-
- if (obj == NULL) {
- return -ENOMEM;
- }
-
- memset(obj, 0, sizeof(struct vm_object));
- obj->vnode = vnode;
- obj->ref = 0;
-
- vm_set_pgops(obj, vnode);
- *res = obj;
- ++obj_count;
- return 0;
-}
-
-int
-vm_obj_destroy(struct vm_object *obj)
-{
- struct vnode *vp = obj->vnode;
-
- /* Check the ref count */
- if (obj->ref > 0)
- return -EBUSY;
-
- if (vp != NULL)
- vp->vmobj = NULL;
-
- dynfree(obj);
- --obj_count;
- return 0;
-}
-
-size_t
-vm_obj_count(void)
-{
- return obj_count;
-}
diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c
deleted file mode 100644
index f496fee..0000000
--- a/sys/vm/vm_page.c
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#include <sys/panic.h>
-#include <vm/page.h>
-#include <vm/vm.h>
-#include <string.h>
-
-__MODULE_NAME("vm_page");
-__KERNEL_META("$Hyra$: vm_page.c, Ian Marco Moffett, "
- "Virtual memory page specific operations");
-
-/*
- * Zero `page_count' pages.
- *
- * @page: First page to start zeroing at
- * @page_count: Number of pages to zero.
- */
-void
-vm_zero_page(void *page, size_t page_count)
-{
- const size_t PAGE_SIZE = vm_get_page_size();
- size_t bytes = page_count * PAGE_SIZE;
-
- /*
- * This *should not* happen. Page sizes
- * are usually 2^n but if this runs, something
- * *very* weird is happening and either something
- * broke badly. Or it's that damn technological
- * degeneration that is getting out of hand within
- * our world!! But really, page sizes *should* be a
- * power of 2 and it would be pretty worrying if
- * this branches causing a panic stating something
- * that shouldn't happen, happened.
- *
- * The reason why it is wise for pages to be a power of
- * 2 is so we can efficiently read/write to the page in
- * fixed-sized power of 2 blocks cleanly without the risk
- * of clobbering other pages we didn't intend to mess with.
- */
- if ((PAGE_SIZE & 1) != 0) {
- panic("Unexpected page size, not power of 2!\n");
- }
-
- memset64(page, 0, bytes/8);
-}
diff --git a/sys/vm/vm_pager.c b/sys/vm/vm_pager.c
deleted file mode 100644
index 0046e9c..0000000
--- a/sys/vm/vm_pager.c
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <vm/pager.h>
-#include <vm/obj.h>
-#include <sys/types.h>
-
-/*
- * Get pages from backing store.
- */
-int
-vm_pager_get(struct vm_object *obj, off_t off, size_t len, struct vm_page *pg)
-{
- struct vm_pagerops *pgops = obj->pgops;
-
- if (obj->is_anon) {
- return -1;
- }
-
- return pgops->get(obj, off, len, pg);
-}
-
-/*
- * Get physical address.
- *
- * TODO: Remove this and add demanding paging.
- */
-int
-vm_pager_paddr(struct vm_object *obj, paddr_t *paddr, vm_prot_t prot)
-{
- struct vm_pagerops *pgops = obj->pgops;
-
- if (obj->is_anon) {
- return -1;
- }
-
- if (pgops->get_paddr == NULL) {
- return 0;
- }
-
- return pgops->get_paddr(obj, paddr, prot);
-}
diff --git a/sys/vm/vm_physseg.c b/sys/vm/vm_physseg.c
deleted file mode 100644
index 88560e5..0000000
--- a/sys/vm/vm_physseg.c
+++ /dev/null
@@ -1,272 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/limine.h>
-#include <sys/cdefs.h>
-#include <sys/syslog.h>
-#include <vm/physseg.h>
-#include <vm/vm.h>
-#include <bitmap.h>
-#include <string.h>
-
-__MODULE_NAME("vm_physseg");
-__KERNEL_META("$Hyra$: vm_physseg.c, Ian Marco Moffett, "
- "The Hyra physical memory manager");
-
-#if defined(VM_PHYSSEG_DEBUG)
-#define DPRINTF(...) KDEBUG(__VA_ARGS__)
-#else
-#define DPRINTF(...) __nothing
-#endif /* defined(VM_PHYSSEG_DEBUG) */
-
-static struct limine_memmap_request mmap_req = {
- .id = LIMINE_MEMMAP_REQUEST,
- .revision = 0
-};
-
-static struct limine_memmap_response *resp = NULL;
-
-__used static const char *segment_name[] = {
- [LIMINE_MEMMAP_USABLE] = "usable",
- [LIMINE_MEMMAP_RESERVED] = "reserved",
- [LIMINE_MEMMAP_ACPI_RECLAIMABLE] = "ACPI reclaimable",
- [LIMINE_MEMMAP_ACPI_NVS] = "ACPI NVS",
- [LIMINE_MEMMAP_BAD_MEMORY] = "bad",
- [LIMINE_MEMMAP_BOOTLOADER_RECLAIMABLE] = "bootloader reclaimable",
- [LIMINE_MEMMAP_KERNEL_AND_MODULES] = "kernel and modules",
- [LIMINE_MEMMAP_FRAMEBUFFER] = "framebuffer"
-};
-
-static const int MAX_SEGMENTS = __ARRAY_COUNT(segment_name);
-
-
-static bitmap_t bitmap = NULL;
-static size_t pages_total = 0;
-static size_t pages_reserved = 0;
-static size_t last_used_idx = 0;
-static size_t pages_allocated = 0;
-static size_t bitmap_size = 0;
-static size_t highest_frame_idx;
-static size_t bitmap_free_start; /* Beginning bit of free region */
-
-static void
-vm_physseg_getstat(void)
-{
- struct limine_memmap_entry *entry;
- size_t entry_pages = 0;
-
- pages_total = 0;
- pages_reserved = 0;
-
- for (size_t i = 0; i < resp->entry_count; ++i) {
- entry = resp->entries[i];
- entry_pages = entry->length / vm_get_page_size();
-
- /* Drop invalid entries */
- if (entry->type >= MAX_SEGMENTS) {
- continue;
- }
-
- pages_total += entry_pages;
-
- if (entry->type != LIMINE_MEMMAP_USABLE) {
- pages_reserved += entry_pages;
- continue;
- }
- }
-}
-
-static void
-vm_physseg_bitmap_alloc(void)
-{
- struct limine_memmap_entry *entry;
- uintptr_t highest_addr = 0;
-
- for (size_t i = 0; i < resp->entry_count; ++i) {
- entry = resp->entries[i];
-
- /* Drop any entries with an invalid type */
- if (entry->type >= MAX_SEGMENTS) {
- continue;
- }
-
- if (entry->type != LIMINE_MEMMAP_USABLE) {
- /* This memory is not usable */
- continue;
- }
-
- if (entry->length >= bitmap_size) {
- bitmap = PHYS_TO_VIRT(entry->base);
- memset(bitmap, 0xFF, bitmap_size);
- entry->length -= bitmap_size;
- entry->base += bitmap_size;
- return;
- }
-
- highest_addr = __MAX(highest_addr, entry->base + entry->length);
- }
-}
-
-static void
-vm_physseg_bitmap_populate(void)
-{
- struct limine_memmap_entry *entry;
-#if defined(VM_PHYSSEG_DEBUG)
- size_t start, end;
-#endif /* defined(VM_PHYSSEG_DEBUG) */
-
- for (size_t i = 0; i < resp->entry_count; ++i) {
- entry = resp->entries[i];
-
- /* Drop any entries with an invalid type */
- if (entry->type >= MAX_SEGMENTS) {
- continue;
- }
-
-#if defined(VM_PHYSSEG_DEBUG)
- /* Dump the memory map if we are debugging */
- start = entry->base;
- end = entry->base + entry->length;
- DPRINTF("0x%x - 0x%x, size: 0x%x, type: %s\n",
- start, end, entry->length,
- segment_name[entry->type]);
-#endif /* defined(VM_PHYSSEG_DEBUG) */
-
- /* Don't set non-usable entries as free */
- if (entry->type != LIMINE_MEMMAP_USABLE) {
- continue;
- }
-
- /* Populate */
- if (bitmap_free_start == 0) {
- bitmap_free_start = entry->base/0x1000;
- }
- for (size_t j = 0; j < entry->length; j += 0x1000) {
- bitmap_unset_bit(bitmap, (entry->base + j) / 0x1000);
- }
- }
-}
-
-static void
-vm_physseg_bitmap_init(void)
-{
- uintptr_t highest_addr;
- struct limine_memmap_entry *entry;
-
- highest_addr = 0;
- highest_frame_idx = 0;
-
- /* Find the highest entry */
- for (size_t i = 0; i < resp->entry_count; ++i) {
- entry = resp->entries[i];
-
- if (entry->type != LIMINE_MEMMAP_USABLE) {
- /* Memeory not usable */
- continue;
- }
-
- highest_addr = __MAX(highest_addr, entry->base + entry->length);
- }
-
- highest_frame_idx = highest_addr / 0x1000;
- bitmap_size = __ALIGN_UP(highest_frame_idx / 8, 0x1000);
-
- DPRINTF("Bitmap size: %d bytes\n", bitmap_size);
- DPRINTF("Allocating and populating bitmap now...\n");
-
- vm_physseg_bitmap_alloc();
- vm_physseg_bitmap_populate();
-}
-
-uintptr_t
-vm_alloc_pageframe(size_t count)
-{
- size_t pages = 0;
- size_t tmp;
-
- while (last_used_idx < highest_frame_idx) {
- if (!bitmap_test_bit(bitmap, last_used_idx++)) {
- /* We have a free page */
- if (++pages != count)
- continue;
-
- tmp = last_used_idx - count;
-
- for (size_t i = tmp; i < last_used_idx; ++i)
- bitmap_set_bit(bitmap, i);
-
- pages_allocated += count;
- return tmp * vm_get_page_size();
- } else {
- pages = 0;
- }
- }
-
- return 0;
-}
-
-/*
- * Frees physical pageframes.
- *
- * @base: Base to start freeing at.
- * @count: Number of pageframes to free.
- */
-void
-vm_free_pageframe(uintptr_t base, size_t count)
-{
- const size_t PAGE_SIZE = vm_get_page_size();
-
- for (uintptr_t p = base; p < base + (count*PAGE_SIZE); p += PAGE_SIZE) {
- bitmap_unset_bit(bitmap, p/0x1000);
- }
-
- pages_allocated -= count;
-}
-
-void
-vm_physseg_init(void)
-{
- resp = mmap_req.response;
-
- vm_physseg_bitmap_init();
-}
-
-struct physmem_stat
-vm_phys_memstat(void)
-{
- size_t pagesize = vm_get_page_size();
- struct physmem_stat stat;
-
- vm_physseg_getstat();
- stat.total_kib = (pages_total * pagesize) / 1024;
- stat.reserved_kib = (pages_reserved * pagesize) / 1024;
- stat.alloc_kib = (pages_allocated * pagesize) / 1024;
- stat.avl_kib = stat.total_kib - stat.alloc_kib;
- return stat;
-}
diff --git a/sys/vm/vm_stat.c b/sys/vm/vm_stat.c
deleted file mode 100644
index 6374699..0000000
--- a/sys/vm/vm_stat.c
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <vm/physseg.h>
-#include <vm/vm.h>
-#include <vm/obj.h>
-
-struct vm_memstat
-vm_memstat(void)
-{
- struct vm_memstat stat;
-
- stat.pmem_stat = vm_phys_memstat();
- stat.vmobj_cnt = vm_obj_count();
- return stat;
-}
diff --git a/sys/vm/vm_vnode.c b/sys/vm/vm_vnode.c
deleted file mode 100644
index e3d95ac..0000000
--- a/sys/vm/vm_vnode.c
+++ /dev/null
@@ -1,114 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/types.h>
-#include <sys/errno.h>
-#include <sys/sio.h>
-#include <sys/vfs.h>
-#include <sys/cdefs.h>
-#include <vm/obj.h>
-#include <vm/vm.h>
-#include <vm/pager.h>
-
-static int vn_pager_get(struct vm_object *obj, off_t off, size_t len,
- struct vm_page *pg);
-
-static int vn_pager_store(struct vm_object *obj, off_t off, size_t len,
- struct vm_page *pg);
-
-/* Pager operations */
-struct vm_pagerops g_vnode_pagerops = {
- .get = vn_pager_get,
- .store = vn_pager_store
-};
-
-static inline void
-vn_prep_sio(struct sio_txn *sio, char *pg, off_t off, size_t len)
-{
- sio->len = __ALIGN_DOWN(len, vm_get_page_size());
- sio->buf = pg;
- sio->offset = off;
- sio->len = len;
-}
-
-static int
-vn_pager_io(struct vm_object *obj, off_t off, size_t len,
- struct vm_page *pg, bool out)
-{
- struct sio_txn sio;
- struct vnode *vp;
- ssize_t paged_bytes;
- char *dest;
- int res = 0;
-
- if (obj == NULL || pg == NULL) {
- return -EIO;
- }
-
- spinlock_acquire(&obj->lock);
- vm_object_ref(obj);
- dest = PHYS_TO_VIRT(pg->physaddr);
-
- /* Attempt to fetch the vnode */
- if ((vp = obj->vnode) == NULL) {
- res = -EIO;
- goto done;
- }
-
- /* Prepare the SIO transaction */
- vn_prep_sio(&sio, dest, off, len);
- if (sio.len == 0) {
- res = -EIO;
- goto done;
- }
-
- /* Perform I/O on the backing store */
- paged_bytes = out ? vfs_write(vp, &sio) : vfs_read(vp, &sio);
- if (paged_bytes < 0) {
- /* Failure */
- res = paged_bytes;
- goto done;
- }
-done:
- vm_object_unref(obj);
- spinlock_release(&obj->lock);
- return res;
-}
-
-static int
-vn_pager_store(struct vm_object *obj, off_t off, size_t len, struct vm_page *pg)
-{
- return vn_pager_io(obj, off, len, pg, true);
-}
-
-static int
-vn_pager_get(struct vm_object *obj, off_t off, size_t len, struct vm_page *pg)
-{
- return vn_pager_io(obj, off, len, pg, false);
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 12:42:01 +0000