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pmm: full rewrite

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I've decided to do a rewrite on it due to some plans that would make refcounting physical pages nescessary among other things. now instead of a bitmap it uses a list of pages with each physical page having a page_t associated with it
This commit is contained in:
Matheus
2023-07-29 17:14:41 -03:00
parent 8ca2360991
commit 55fc1b7026
11 changed files with 267 additions and 179 deletions
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kernel-src/mm/vmm.c
+6 -6
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@@ -10,7 +10,7 @@
#define RANGE_TOP(x) (void *)((uintptr_t)x->start + x->size)
static vmmcache_t *newcache() {
vmmcache_t *ptr = pmm_alloc(1, PMM_SECTION_DEFAULT);
vmmcache_t *ptr = pmm_allocpage(PMM_SECTION_DEFAULT);
if (ptr == NULL)
return NULL;
ptr = MAKE_HHDM(ptr);
@@ -221,7 +221,7 @@ static void destroyrange(vmmrange_t *range, uintmax_t _offset, size_t size, int
if ((range->flags & VMM_FLAGS_FILE) && (range->flags & VMM_FLAGS_SHARED) && (flags & VMM_DESTROY_FLAGS_NOSYNC) == 0) {
__assert(VOP_MUNMAP(range->vnode, vaddr, range->offset + offset, mmuflagstovnodeflags(range->mmuflags) | (range->flags & VMM_FLAGS_SHARED ? V_FFLAGS_SHARED : 0), cred) == 0);
} else {
pmm_free(physical, 1);
pmm_release(physical);
arch_mmu_unmap(_cpu()->vmmctx->pagetable, vaddr);
}
}
@@ -330,7 +330,7 @@ bool vmm_pagefault(void *addr, bool user, int actions) {
__assert(VOP_MMAP(range->vnode, addr, range->offset + mapoffset, mmuflagstovnodeflags(range->mmuflags) | (range->flags & VMM_FLAGS_SHARED ? V_FFLAGS_SHARED : 0), cred) == 0);
status = true;
} else {
void *paddr = pmm_alloc(1, PMM_SECTION_DEFAULT);
void *paddr = pmm_allocpage(PMM_SECTION_DEFAULT);
__assert(paddr); // XXX handle these better than an assert once there are signals and such
__assert(arch_mmu_map(_cpu()->vmmctx->pagetable, paddr, addr, range->mmuflags));
memset(MAKE_HHDM(paddr), 0, PAGE_SIZE);
@@ -399,7 +399,7 @@ void *vmm_map(void *addr, volatile size_t size, int flags, mmuflags_t mmuflags,
} else if (flags & VMM_FLAGS_ALLOCATE) {
// allocate to virtual memory
for (uintmax_t i = 0; i < size; i += PAGE_SIZE) {
void *allocated = pmm_alloc(1, PMM_SECTION_DEFAULT);
void *allocated = pmm_allocpage(PMM_SECTION_DEFAULT);
if (allocated == NULL) {
retaddr = NULL;
goto cleanup;
@@ -411,7 +411,7 @@ void *vmm_map(void *addr, volatile size_t size, int flags, mmuflags_t mmuflags,
void *physical = arch_mmu_getphysical(_cpu()->vmmctx->pagetable, virt);
if (physical) {
pmm_free(physical, 1);
pmm_release(physical);
arch_mmu_unmap(_cpu()->vmmctx->pagetable, virt);
}
}
@@ -529,7 +529,7 @@ vmmcontext_t *vmm_fork(vmmcontext_t *oldcontext) {
if (phys == NULL)
continue;
void *palloc = pmm_alloc(1, PMM_SECTION_DEFAULT);
void *palloc = pmm_allocpage(PMM_SECTION_DEFAULT);
if (palloc == NULL)
goto error;