pmm.h File Reference
#include <kernel/memory.h>#include <kernel/types.h>#include <utils/bits.h>#include <multiboot.h>#include <stdbool.h>
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Data Structures | |
| struct | page |
| Represents a physical pageframe. More... | |
Macros | |
| #define | PMM_INVALID_PAGEFRAME (0xFFFFFFFFUL) |
| Error value returned by the PMM in case of errors. | |
| #define | TOTAL_PAGEFRAMES_COUNT (ADDRESS_SPACE_SIZE / PAGE_SIZE) |
| Total number of pageframes. More... | |
| #define | TO_PFN(_pageframe) (((native_t)(_pageframe)) >> PAGE_SHIFT) |
| Convert pageframe address to page frame number. | |
| #define | FROM_PFN(_pageframe) ((_pageframe) << PAGE_SHIFT) |
| Convert pageframe number to pageframe address. | |
| #define | pmm_allocate() pmm_allocate_pages(PAGE_SIZE) |
| Allocate a previously unused pageframe. More... | |
Enumerations | |
| enum | page_flags { PAGE_AVAILABLE = BIT(0) , PAGE_COW = BIT(1) } |
| Flags used for struct page 'flags' field. More... | |
Functions | |
| static paddr_t | page_address (const struct page *page) |
| static struct page * | pfn_to_page (unsigned int pfn) |
| static struct page * | address_to_page (paddr_t addr) |
| struct page * | page_get (struct page *page) |
| Increase the page's refcount. | |
| void | page_put (struct page *page) |
| Decrease the page's refcount. More... | |
| static bool | page_is_cow (struct page *page) |
| bool | pmm_init (struct multiboot_info *) |
| Initialize the Physical Memory Mapper. More... | |
| paddr_t | pmm_allocate_pages (size_t size) |
| Allocate previously unused pageframes. More... | |
| void | pmm_free_pages (paddr_t pageframe, size_t size) |
| Release previously allocated contiguous pageframes. | |
Variables | |
| struct page | pmm_pageframes [TOTAL_PAGEFRAMES_COUNT] |
| The array of all existing pageframes. More... | |
