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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/fs/tmpfs.c
+4 -4
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@@ -392,12 +392,12 @@ static int tmpfs_readlink(vnode_t *node, char **link, cred_t *cred) {
#define MMAPTMPFLAGS (ARCH_MMU_FLAGS_READ | ARCH_MMU_FLAGS_NOEXEC | ARCH_MMU_FLAGS_WRITE)
static int tmpfs_mmap(vnode_t *node, void *addr, uintmax_t offset, int flags, cred_t *cred) {
void *paddr = pmm_alloc(1, PMM_SECTION_DEFAULT);
void *paddr = pmm_allocpage(PMM_SECTION_DEFAULT);
if (paddr == NULL)
return ENOMEM;
if (arch_mmu_map(_cpu()->vmmctx->pagetable, paddr, addr, MMAPTMPFLAGS) == false) {
pmm_free(paddr, 1);
pmm_release(paddr);
return ENOMEM;
}
@@ -405,7 +405,7 @@ static int tmpfs_mmap(vnode_t *node, void *addr, uintmax_t offset, int flags, cr
int e = tmpfs_read(node, addr, PAGE_SIZE, offset, flags, &readc, cred);
if (e) {
arch_mmu_unmap(_cpu()->vmmctx->pagetable, addr);
pmm_free(paddr, 1);
pmm_release(paddr);
return e;
}
@@ -426,7 +426,7 @@ static int tmpfs_munmap(vnode_t *node, void *addr, uintmax_t offset, int flags,
void *paddr = arch_mmu_getphysical(_cpu()->vmmctx->pagetable, addr);
__assert(paddr);
arch_mmu_unmap(_cpu()->vmmctx->pagetable, addr);
pmm_free(paddr, 1);
pmm_release(paddr);
return 0;
}