stuff2

kernel/mem/vas.c

@@ -1,97 +0,0 @@
-#include <zinnia/status.h>
-#include <common/utils.h>
-#include <kernel/alloc.h>
-#include <kernel/assert.h>
-#include <kernel/vas.h>
-
-// Try to create a new, empty virtual address space.
-zn_status_t vma_new(struct vas** out) {
-    DEBUG_ASSERT(out != nullptr, "Missing out");
-
-    zn_status_t res;
-    if (!out)
-        return ZN_ERR_INVALID;
-
-    struct vas* vmspace = mem_alloc(sizeof(struct vas), 0);
-    if (!vmspace)
-        return ZN_ERR_NO_MEMORY;
-
-    res = pmap_new_user(&vmspace->pmap, 0);
-    if (res)
-        goto err1;
-
-    *out = vmspace;
-    return ZN_OK;
-
-err1:
-    mem_free(vmspace);
-err0:
-    return res;
-}
-
-// Delete a virtual address space.
-void vma_delete(struct vas* vm) {}
-
-// Remove any mappings in the given address range.
-// May fail if there is no memory and a mapping needs to be split.
-zn_status_t vma_unmap(struct vas* vm, uintptr_t vaddr, size_t size);
-
-// Change the protection of an existing mapping.
-// May fail if there is no memory and a mapping needs to be split.
-zn_status_t vma_protect(struct vas* vm, uintptr_t vaddr, size_t size, enum zn_vm_flags flags);
-
-// Try to handle a page fault.
-bool vma_page_fault(struct vas* vm, uintptr_t vaddr, enum zn_vm_flags access_type) {
-    // TODO
-    return false;
-}
-
-zn_status_t vma_map_vmo(
-    struct vas* vas,
-    struct vmo* vmo,
-    uintptr_t addr,
-    size_t len,
-    enum zn_vm_flags flags,
-    uintptr_t vmo_offset
-) {
-    const size_t page_size = arch_mem_page_size();
-
-    if (addr % page_size != vmo_offset % page_size)
-        return ZN_ERR_INVALID;
-
-    size_t start_page = addr / page_size;
-    const size_t addr_offset = addr % page_size;
-    const size_t pages = ALIGN_UP(addr_offset + len, page_size) / page_size;
-    size_t end_page = start_page + pages;
-
-    if (!vas || !vmo)
-        return ZN_ERR_INVALID;
-
-    const size_t first_vmo_page = vmo_offset / page_size;
-
-    for (size_t p = start_page; p < end_page; ++p) {
-        const size_t page_index = p - start_page;
-        struct page* page_obj;
-        zn_status_t status = vmo->get_page(vmo, first_vmo_page + page_index, &page_obj);
-        if (status != ZN_OK)
-            return status;
-
-        phys_t paddr = (phys_t)vm_page_addr(page_obj);
-
-        enum pte_flags pf = 0;
-        if (flags & ZN_VM_MAP_READ)
-            pf |= PTE_READ;
-        if (flags & ZN_VM_MAP_WRITE)
-            pf |= PTE_WRITE;
-        if (flags & ZN_VM_MAP_EXEC)
-            pf |= PTE_EXEC;
-        if (vas->pmap.is_user)
-            pf |= PTE_USER;
-
-        status = pmap_map(&vas->pmap, p * page_size, paddr, pf, CACHE_NONE);
-        if (status != ZN_OK)
-            return status;
-    }
-
-    return ZN_OK;
-}