paging
This commit is contained in:
Tyler Murphy
parent
513b9b3199
commit
e6bec1afcd
11 changed files with 134 additions and 76 deletions
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@ -1,29 +1,38 @@
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ENTRY(start)
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SECTIONS {
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. = 1M;
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. = 0x00100000;
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kernel_start = .;
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.boot BLOCK(4K) : ALIGN(4K)
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{
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*(.multiboot)
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}
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.multiboot.data : {
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*(.multiboot.data)
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}
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.text BLOCK(4K) : ALIGN(4K)
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.multiboot.text : {
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*(.multiboot.text)
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}
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. += 0xC0000000;
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.text ALIGN (4K) : AT (ADDR (.text) - 0xC0000000)
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{
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*(.text)
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}
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.rodata BLOCK(4K) : ALIGN(4K)
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.rodata ALIGN (4K) : AT (ADDR (.rodata) - 0xC0000000)
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{
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*(.rodata)
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}
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.bss BLOCK(4K) : ALIGN(4K)
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.data ALIGN (4K) : AT (ADDR (.data) - 0xC0000000)
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{
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*(.data)
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}
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.bss ALIGN (4K) : AT (ADDR (.bss) - 0xC0000000)
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{
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*(COMMON)
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*(.bss)
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*(.bootstrap_stack)
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}
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kernel_end = .;
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@ -9,7 +9,6 @@
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static struct BootInfo info;
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static void read_cmdline(struct BootTag *tag, char *data, uint8_t len) {
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debugk("Found cmdline");
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if (len >= CMDLINE_MAX)
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panic("multiboot2 cmd line to long\nmax is %d but was provided %d\n",
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CMDLINE_MAX, len);
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@ -18,13 +17,11 @@ static void read_cmdline(struct BootTag *tag, char *data, uint8_t len) {
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}
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static void read_memorymap(struct BootTag *tag, uint32_t *data) {
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debugk("Found memorymap");
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tag->data.memory_map = (struct MemoryMap *) data;
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info.tags[iD_MEMORYMAP] = *tag;
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}
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static void read_rsdp(struct BootTag *tag, char *data) {
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debugk("Found RSDP");
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tag->data.rsdp = (struct RootSystemDescriptionPointer *) data;
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info.tags[ID_RSDP] = *tag;
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}
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@ -60,8 +57,6 @@ static uint32_t *read_tag(uint32_t *data) {
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void load_boot_info(void* boot_info) {
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debugk("Reading multiboot info");
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memset(&info, 0, sizeof(boot_info));
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uint32_t* data = (uint32_t*) boot_info;
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@ -72,7 +67,6 @@ void load_boot_info(void* boot_info) {
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data = read_tag(data);
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}
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succek("Loaded multiboot info");
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}
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bool get_boot_tag(enum BootTagID id, struct BootTag **tag) {
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@ -2,19 +2,17 @@
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#include "print.h"
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extern int sse_init (void);
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extern int fpu_init (void);
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extern uint8_t sse_init (void);
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extern uint8_t fpu_init (void);
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void init_registers (void) {
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if (!sse_init()) {
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debugk("Loaded SIMD");
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} else {
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errork("SIMD not supported");
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}
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uint8_t init_registers (uint8_t reg) {
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uint8_t res = 0;
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if (!fpu_init()) {
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debugk("Loaded FPU");
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} else {
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errork("FPU not supported");
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}
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if (reg & SSE_REG)
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res |= ~sse_init() & SSE_REG;
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if (reg & FPU_REG)
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res |= ~fpu_init() & FPU_REG;
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return res;
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}
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@ -1,3 +1,8 @@
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#pragma once
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void init_registers (void);
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#include <stdint.h>
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#define SSE_REG 0x01
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#define FPU_REG 0x02
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uint8_t init_registers (uint8_t reg);
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@ -48,8 +48,6 @@ void ps2ctrl_set_port2(void) {
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void ps2ctrl_init(void) {
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debugk("Loading PS/2 Controller");
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is_init = false;
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pic_mask(1); // keyboard
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@ -61,8 +59,7 @@ void ps2ctrl_init(void) {
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ps2ctrl_out_cmd(0xAA);
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uint8_t response = ps2ctrl_in();
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if(response != 0x55) {
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errork("PS/2 controller failed to initialize");
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return;
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panic("PS/2 controller failed to initialize");
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}
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// set config
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@ -80,8 +77,7 @@ void ps2ctrl_init(void) {
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ps2ctrl_out_cmd(0xA9);
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response = ps2ctrl_in();
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if (response == 0x01) {
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errork("PS/2 port 2 not supported");
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return;
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panic("PS/2 port 2 not supported");
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}
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ps2ctrl_out_cmd(0xA8);
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@ -90,8 +86,6 @@ void ps2ctrl_init(void) {
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pic_unmask(1);
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pic_unmask(12);
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succek("Loaded PS/2 Controller");
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}
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bool ps2ctrl_is_init(void) {
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@ -59,8 +59,6 @@ static bool state_ext = false;
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void ps2kb_init(void) {
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debugk("Loading PS/2 Keyboard");
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is_init = false;
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pic_mask(1);
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@ -69,24 +67,22 @@ void ps2kb_init(void) {
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ps2ctrl_out_data(0xFF);
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result = ps2ctrl_in();
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if(result != 0xFA) {
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errork("Failed to reset PS/2 keyboard: expected 0xFA, got 0x%X\n", result);
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panic("Failed to reset PS/2 keyboard: expected 0xFA, got 0x%X\n", result);
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return;
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}
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result = ps2ctrl_in();
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if(result != 0xAA) {
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errork("Failed to reset PS/2 keyboard: expected 0xAA, got 0x%X\n", result);
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panic("Failed to reset PS/2 keyboard: expected 0xAA, got 0x%X\n", result);
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return;
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}
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ps2ctrl_out_data(0xF4);
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result = ps2ctrl_in();
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if(result != 0xFA) {
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errork("Failed to enable PS/2 keyboard: expected 0xFA, got 0x%X\n", result);
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panic("Failed to enable PS/2 keyboard: expected 0xFA, got 0x%X\n", result);
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return;
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}
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succek("PS/2 Keyboard has has been loaded");
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pic_unmask(1);
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is_init = true;
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}
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@ -15,8 +15,6 @@ static uint8_t first_b, second_b, third_b;
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void ps2mouse_init(void) {
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debugk("Loading PS/2 Mouse");
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is_init = false;
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pic_mask(12);
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@ -26,12 +24,12 @@ void ps2mouse_init(void) {
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ps2ctrl_out_data(0xFF);
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result = ps2ctrl_in();
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if (result != 0xFA) {
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errork("Failed to reset PS/2 mouse: expected 0xFA, got 0x%X", result);
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panic("Failed to reset PS/2 mouse: expected 0xFA, got 0x%X", result);
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return;
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}
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result = ps2ctrl_in();
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if (result != 0xAA) {
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errork("Failed to reset PS/2 mouse: expected 0xAA, got 0x%X", result);
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panic("Failed to reset PS/2 mouse: expected 0xAA, got 0x%X", result);
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return;
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}
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@ -40,8 +38,6 @@ void ps2mouse_init(void) {
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pic_unmask(12);
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is_init = true;
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succek("PS/2 Mouse has has been loaded");
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}
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static uint8_t packet_num = 0;
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@ -12,12 +12,18 @@
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#include <print.h>
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#include <math.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <sys.h>
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static double x = 0, y = 0;
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void kernel_main(void* boot_info) {
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void kernel_boot(void *boot_info) {
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(void)boot_info;
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}
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void kernel_main(void) {
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term_init();
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cursor_enable();
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@ -28,16 +34,16 @@ void kernel_main(void* boot_info) {
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idt_init();
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pic_remap(PIC_REMAP_OFFSET);
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load_boot_info(boot_info);
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acpi_init();
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// load_boot_info(boot_info);
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// acpi_init();
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memory_init();
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// memory_init();
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ps2ctrl_init();
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ps2kb_init();
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ps2mouse_init();
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init_registers();
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init_registers(FPU_REG | SSE_REG);
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while(1) {
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int_wait();
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@ -20,7 +20,7 @@ void _panic_impl(char* msg, int line, char* file, ...) {
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vprintk(msg, args);
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if (!term_newline()) putchar('\n');
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printk("\nin %s at line %d\n", file, line);
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term_flush();
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while(1) {
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halt();
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}
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@ -1,6 +1,8 @@
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global start
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global heap_start
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extern kernel_boot
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extern kernel_main
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extern kernel_start
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extern kernel_end
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bits 32
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; base, limit, access, flags
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@ -16,14 +18,18 @@ bits 32
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%endmacro
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MAGIC equ 0xe85250d6
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FLAGS equ 0
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LENGTH equ mb_end - mb_start
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CHECKSUM equ -(MAGIC + LENGTH)
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section .multiboot
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VGABUF equ 0x000B8000
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KRNMAP equ 0xC0000000
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section .multiboot.data
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align 8
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mb_start:
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dd MAGIC
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dd 0
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dd FLAGS
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dd LENGTH
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dd CHECKSUM
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dw 0
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@ -31,12 +37,6 @@ dw 0
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dd 8
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mb_end:
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section .bss
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align 16
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stack_end:
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resb 16384
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stack_top:
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section .rodata
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align 16
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gdt_start:
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@ -48,16 +48,77 @@ gdt_descriptor:
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dw gdt_end - gdt_start - 1
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dd gdt_start
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section .text
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section .bootstrap_stack
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align 16
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stack_start:
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resb 16384 ; 16 KiB
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stack_end:
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section .bss
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align 4096
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page_directory:
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resb 4096
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page_table1:
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resb 4096
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section .multiboot.text
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align 8
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start:
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; push ebx
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; call kernel_boot
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; pop eax
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mov edi, page_table1 - KRNMAP
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mov esi, 0
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mov ecx, 1023
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paging_cmp:
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cmp esi, kernel_start
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jl paging_add
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cmp esi, kernel_end - KRNMAP
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jge paging_map
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mov edx, esi
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or edx, 0x003
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mov [edi], edx
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paging_add:
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add esi, 4096
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add edi, 4
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loop paging_cmp
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paging_map:
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mov dword [page_table1 - KRNMAP + 1023 * 4], VGABUF | 0x003
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mov dword [page_directory - KRNMAP + 0], page_table1 - KRNMAP + 0x003
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mov dword [page_directory - KRNMAP + 768 * 4], page_table1 - KRNMAP + 0x003
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mov ecx, page_directory - KRNMAP
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mov cr3, ecx
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mov ecx, cr0
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or ecx, 0x80010000
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mov cr0, ecx
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lea ecx, load_gdt
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jmp near ecx
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section .text
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align 8
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load_gdt:
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cli
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lgdt [gdt_descriptor]
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mov eax, cr0
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or al, 1
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mov cr0, eax
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jmp 0x08:after_lgdt
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after_lgdt:
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jmp 0x08:load_kernel
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load_kernel:
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mov dword [page_directory], 0
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mov ecx, cr3
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mov cr3, ecx
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mov ax, 0x10
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mov ds, ax
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mov ss, ax
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@ -67,7 +128,6 @@ after_lgdt:
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mov esp, stack_end
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mov ebp, stack_end
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sti
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push ebx
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call kernel_main
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cli
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halt:
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@ -28,7 +28,7 @@ static void term_clear_line(int y) {
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void term_init (void) {
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x = 0;
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y = 0;
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front = (uint16_t*) 0xb8000;
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front = (uint16_t*) 0xC03FF000;
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term_setfg(VGA_WHITE);
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term_setbg(VGA_BLACK);
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term_clear();
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