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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/io/fb.c
+3 -3
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@@ -129,14 +129,14 @@ static int mmap(int minor, void *addr, uintmax_t offset, int flags) {
return arch_mmu_map(_cpu()->vmmctx->pagetable, FROM_HHDM((void *)((uintptr_t)fbs[minor]->address + offset)), addr, vnodeflagstommuflags(flags)) ? 0 : ENOMEM;
} else {
size_t size = offset + PAGE_SIZE < end ? PAGE_SIZE : end - offset;
paddr = pmm_alloc(1, PMM_SECTION_DEFAULT);
paddr = pmm_allocpage(PMM_SECTION_DEFAULT);
if (paddr == NULL)
return ENOMEM;
memcpy(MAKE_HHDM(paddr), (void *)((uintptr_t)fbs[minor]->address + offset), size);
if (arch_mmu_map(_cpu()->vmmctx->pagetable, paddr, addr, vnodeflagstommuflags(flags)) == false) {
pmm_free(paddr, 1);
pmm_release(paddr);
return ENOMEM;
}
@@ -148,7 +148,7 @@ static int munmap(int minor, void *addr, uintmax_t offset, int flags) {
void *phys = arch_mmu_getphysical(_cpu()->vmmctx->pagetable, addr);
arch_mmu_unmap(_cpu()->vmmctx->pagetable, addr);
if ((flags & V_FFLAGS_SHARED) == 0) {
pmm_free(phys, 1);
pmm_release(phys);
}
return 0;