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/*
* Copyright (c) 2025 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 <kern/panic.h>
#include <vm/kalloc.h>
#include <vm/tlsf.h>
#include <vm/phys.h>
#include <mu/spinlock.h>
#include <vm/vm.h>
#define MEM_SIZE 0x200000
/*
* XXX: This lock is shared globally, it might be a better
* idea to move the whole context per core sometime
* soon?
*/
static volatile size_t lock = 0;
static tlsf_t ctx;
void *
kalloc(size_t sz)
{
void *tmp;
mu_spinlock_acq(&lock, 0);
tmp = tlsf_malloc(ctx, sz);
mu_spinlock_rel(&lock, 0);
return tmp;
}
void
kfree(void *ptr)
{
mu_spinlock_acq(&lock, 0);
tlsf_free(ctx, ptr);
mu_spinlock_rel(&lock, 0);
}
void
vm_kalloc_init(void)
{
uintptr_t phys, *virt;
phys = vm_phys_alloc(MEM_SIZE / 4096);
if (phys == 0) {
panic("kalloc: could not allocate pages\n");
}
virt = PHYS_TO_VIRT(phys);
ctx = tlsf_create_with_pool(virt, MEM_SIZE);
if (ctx == NULL) {
panic("kalloc: could not init context\n");
}
}
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