Rick Rongen
20ab9e1d6e
Added late gdt setup with initial tss Moved attributes to include root Reordered some imports
59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
//
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// Created by rick on 21-02-21.
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//
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#include <attributes.h>
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#include <stdbool.h>
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#include <sys/types.h>
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#include <myke/mem/paging.h>
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#define TABLE_ADDR_MASK 0xFFFFF000
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#define DIRECTORY_SIZE 1024
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const uint32_t x = TABLE_ADDR_MASK;
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typedef struct {
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union {
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struct {
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bool present: 1;
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bool read_write: 1;
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bool user_mode: 1;
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bool write_through: 1;
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bool cache_disabled: 1;
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bool accessed: 1;
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char ignored: 1;
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bool page_size: 1;
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bool global: 1; // ignored
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uint8_t avail: 3;
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} att_packed;
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uint32_t addr;
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};
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} att_packed page_directory_entry;
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typedef struct {
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union {
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struct {
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bool present: 1;
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bool read_write: 1;
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bool user_supervisor: 1;
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bool write_through: 1;
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bool cache_disabled: 1;
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bool accessed: 1;
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bool dirty: 1;
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char ignored: 1;
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bool global: 1;
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uint8_t available: 3;
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} att_packed;
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uint32_t addr;
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};
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} att_packed page_table_entry;
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page_directory_entry page_directory[DIRECTORY_SIZE] att_aligned(4096);
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void page_pre_init() {
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for (int i = 0; i < DIRECTORY_SIZE; ++i) {
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page_directory[i].read_write = true;
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page_directory[i].user_mode = false;
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page_directory[i].present = false;
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}
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} |