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/*
* 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/panic.h>
#include <vm/vm.h>
#include <vm/physmem.h>
#include <vm/pmap.h>
#include <assert.h>
#define DYNALLOC_POOL_SZ 0x400000 /* 4 MiB */
#define DYNALLOC_POOL_PAGES (DYNALLOC_POOL_SZ / DEFAULT_PAGESIZE)
struct vas g_kvas;
static struct vm_ctx vm_ctx;
volatile struct limine_hhdm_request g_hhdm_request = {
.id = LIMINE_HHDM_REQUEST,
.revision = 0
};
struct vm_ctx *
vm_get_ctx(void)
{
return &vm_ctx;
}
void
vm_init(void)
{
void *pool;
vm_physmem_init();
g_kvas = pmap_read_vas();
vm_ctx.dynalloc_pool_sz = DYNALLOC_POOL_SZ;
vm_ctx.dynalloc_pool_pa = vm_alloc_frame(DYNALLOC_POOL_PAGES);
if (vm_ctx.dynalloc_pool_pa == 0) {
panic("Failed to allocate dynamic pool\n");
}
pool = PHYS_TO_VIRT(vm_ctx.dynalloc_pool_pa);
vm_ctx.tlsf_ctx = tlsf_create_with_pool(pool, DYNALLOC_POOL_SZ);
__assert(vm_ctx.tlsf_ctx != 0);
}
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