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/*
* Copyright (c) 2025 Ian Marco Moffett and L5 engineers
* 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 the project 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/panic.h>
#include <os/kalloc.h>
#include <os/spinlock.h>
#include <vm/tlsf.h>
#include <vm/physseg.h>
#include <vm/vm.h>
#include <stdbool.h>
#define KALLOC_POOL_PAGES (KALLOC_POOL_SZ / DEFAULT_PAGESIZE)
#define KALLOC_POOL_SZ 0x400000 /* 4 MiB */
void __kalloc_init(void);
static struct spinlock lock;
static tlsf_t tlsf_ctx;
static paddr_t pool = 0;
static void *pool_va = 0;
static bool is_init = false;
/*
* Memory allocation
*/
void *
kalloc(size_t sz)
{
void *tmp;
if (!is_init) {
return NULL;
}
spinlock_acquire(&lock);
tmp = tlsf_malloc(tlsf_ctx, sz);
spinlock_release(&lock);
return tmp;
}
/*
* Memory deallocation
*/
void
kfree(void *ptr)
{
spinlock_acquire(&lock);
tlsf_free(tlsf_ctx, ptr);
spinlock_release(&lock);
}
void
__kalloc_init(void)
{
/* Don't do it twice */
if (is_init) {
return;
}
pool = vm_alloc_frame(KALLOC_POOL_PAGES);
if (pool == 0) {
panic("__kalloc_init: could not create pool\n");
}
pool_va = PHYS_TO_VIRT(pool);
tlsf_ctx = tlsf_create_with_pool(pool_va, KALLOC_POOL_SZ);
is_init = true;
}
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