diff options
Diffstat (limited to 'kernel/mm')
-rw-r--r-- | kernel/mm/physical_mm/allocation.c | 51 | ||||
-rw-r--r-- | kernel/mm/physical_mm/physical_mm.c (renamed from kernel/mm/physical_mm/initialization.c) | 41 |
2 files changed, 41 insertions, 51 deletions
diff --git a/kernel/mm/physical_mm/allocation.c b/kernel/mm/physical_mm/allocation.c deleted file mode 100644 index 85d945f..0000000 --- a/kernel/mm/physical_mm/allocation.c +++ /dev/null @@ -1,51 +0,0 @@ -#include <stdbool.h> -#include <stdint.h> - -#include <libk/stdio.h> - -#include <mm/physical_mm.h> - -#include <kernel/halt.h> - -uint32_t -physical_mm_find_first_free_block(uint32_t *memory_map) -{ - /* TODO: Why doesn't using block_count instead of MAX_BLOCKS work? */ - for (uint32_t i = 0; i < MAX_BLOCKS / BITMAP_ENTRY_SIZE; i++) - /* At least one block in the entry isn't in use */ - if (memory_map[i] != 0xffffffff) - /* Test each bit to see if it's zero */ - for (uint32_t j = 0; j < BITMAP_ENTRY_SIZE; j++) - if (!physical_mm_test_bit(i * BITMAP_ENTRY_SIZE + j, memory_map)) - return i * BITMAP_ENTRY_SIZE + j; - - /* Shouldn't be reached, since we're keeping track of the number of free - * blocks */ - ASSERT_NOT_REACHED(); - return -1; -} - -void * -physical_mm_allocate_block(uint32_t *total_free_blocks, uint32_t *memory_map) -{ - if (total_free_blocks == 0) { - printk("physical_mm", "No more free blocks!"); - return NULL; - } - - uint32_t block = physical_mm_find_first_free_block(memory_map); - - physical_mm_set_used(block, total_free_blocks, memory_map); - - uint32_t physical_address = block * BLOCK_SIZE; - return (void *) physical_address; -} - -void -physical_mm_free_block(void *physical_address, - uint32_t *total_free_blocks, - uint32_t *memory_map) -{ - uint32_t block = ((uint32_t) physical_address) / BLOCK_SIZE; - physical_mm_set_usable(block, total_free_blocks, memory_map); -} diff --git a/kernel/mm/physical_mm/initialization.c b/kernel/mm/physical_mm/physical_mm.c index 779760c..2040fbd 100644 --- a/kernel/mm/physical_mm/initialization.c +++ b/kernel/mm/physical_mm/physical_mm.c @@ -112,3 +112,44 @@ physical_mm_init(void) free_blcks); #endif } + +uint32_t +physical_mm_find_first_free_block(void) +{ + /* TODO: Why doesn't using block_count instead of MAX_BLOCKS work? */ + for (uint32_t i = 0; i < MAX_BLOCKS / BITMAP_ENTRY_SIZE; i++) + /* At least one block in the entry isn't in use */ + if (memory_map[i] != 0xffffffff) + /* Test each bit to see if it's zero */ + for (uint32_t j = 0; j < BITMAP_ENTRY_SIZE; j++) + if (!physical_mm_test_bit(i * BITMAP_ENTRY_SIZE + j, memory_map)) + return i * BITMAP_ENTRY_SIZE + j; + + /* Shouldn't be reached, since we're keeping track of the number of free + * blocks */ + ASSERT_NOT_REACHED(); + return -1; +} + +void * +physical_mm_allocate_block(void) +{ + if (total_free_blocks == 0) { + printk("physical_mm", "No more free blocks!"); + return NULL; + } + + uint32_t block = physical_mm_find_first_free_block(); + + physical_mm_set_used(block, &total_free_blocks, memory_map); + + uint32_t physical_address = block * BLOCK_SIZE; + return (void *) physical_address; +} + +void +physical_mm_free_block(void *physical_address) +{ + uint32_t block = ((uint32_t) physical_address) / BLOCK_SIZE; + physical_mm_set_usable(block, &total_free_blocks, memory_map); +} |