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wip: change memory to have access to page_tables and allocate these dynamically

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0x35c
2024-10-25 15:11:11 +02:00
parent f5147e78f9
commit a9bfb49bb8
7 changed files with 52 additions and 35 deletions
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17
src/memory/memory.c
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@ -7,24 +7,11 @@
uint32_t *page_directory = &boot_page_directory;
uint32_t page_table_default[1024] __attribute__((aligned(4096)));
static void alloc_page_tables(void)
{
uint32_t *frame_ptr = NULL;
for (int16_t i = 1; i < 768; i++) {
uint32_t *page_table = alloc_pages(PAGE_SIZE, &frame_ptr);
for (int16_t j = 0; j < 1024; j++)
page_table[j] = j << 12 | 0x03;
page_directory[i] = ((uint32_t)frame_ptr & PAGE_MASK) | 0x03;
}
}
void init_memory(void)
{
assert(page_directory);
for (int16_t i = 0; i < 0x300; i++)
for (uint16_t i = 0; i < 0x300; i++)
page_directory[i] = 0x02;
for (int16_t i = 0; i < 1024; i++)
page_table_default[i] = (i << 12) | 0x03;
init_page_table(page_table_default, 0);
page_directory[0] = ((uint32_t)page_table_default - HEAP_END) | 0x03;
alloc_page_tables();
}