From 278d29c5021b1a0e3ecdead373a2d084e45dbecc Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Fri, 24 Nov 2023 10:10:52 -0500 Subject: kernel: vm: Port TLSF allocator This commit adds a Two-Level Segregated Fit memory allocator port to the Hyra kernelspace. Signed-off-by: Ian Moffett --- sys/vm/vm_init.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'sys/vm/vm_init.c') diff --git a/sys/vm/vm_init.c b/sys/vm/vm_init.c index ae50a43..600e61d 100644 --- a/sys/vm/vm_init.c +++ b/sys/vm/vm_init.c @@ -28,17 +28,51 @@ */ #include +#include #include +#include + +/* + * 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 volatile struct cpu_vm_ctx bsp_vm_ctx = {0}; + volatile struct limine_hhdm_request g_hhdm_request = { .id = LIMINE_HHDM_REQUEST, .revision = 0 }; +struct cpu_vm_ctx +vm_get_bsp_ctx(void) +{ + return bsp_vm_ctx; +} + void vm_init(void) { + void *pool_va; + kernel_vas = pmap_read_vas(); + + /* 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); } -- cgit v1.2.3