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This commit is contained in:
Benji Dial 2019-12-26 19:42:52 -05:00
parent c055a2f6a9
commit 3353bdaf2b
3 changed files with 195 additions and 35 deletions
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180
src/kernel/main.c
View file

@ -24,27 +24,27 @@ OF THIS SOFTWARE.
#include <stdbool.h>
enum tag_type {
BOOT_COMMAND = 1,
LOADER_NAME = 2,
BOOT_MODULES = 3,
MEMORY_INFO = 4,
BOOT_DEVICE = 5,
MEMORY_MAP = 6,
VBE_INFO = 7,
FBUF_INFO = 8,
ELF_SYMBOLS = 9,
APM_TABLE = 10,
EFI_I386_TABLE = 11,
EFI_AMD64_TABLE = 12,
SMBIOS_TABLE = 13,
RSDP_ACPI1 = 14,
RSDP_ACPI2 = 15,
NETWORK_INFO = 16,
EFI_MEMORY_MAP = 17,
EFI_SERVICES = 18,
EFI_I386_HANDLE = 19,
EFI_AMD64_HANDLE = 20,
IMAGE_BASE_ADDR = 21
BOOT_COMMAND = 0x00000001,
LOADER_NAME = 0x00000002,
BOOT_MODULES = 0x00000003,
MEMORY_INFO = 0x00000004,
BOOT_DEVICE = 0x00000005,
MEMORY_MAP = 0x00000006,
VBE_INFO = 0x00000007,
FBUF_INFO = 0x00000008,
ELF_SYMBOLS = 0x00000009,
APM_TABLE = 0x0000000a,
EFI_I386_TABLE = 0x0000000b,
EFI_AMD64_TABLE = 0x0000000c,
SMBIOS_TABLE = 0x0000000d,
RSDP_ACPI1 = 0x0000000e,
RSDP_ACPI2 = 0x0000000f,
NETWORK_INFO = 0x00000010,
EFI_MEMORY_MAP = 0x00000011,
EFI_SERVICES = 0x00000012,
EFI_I386_HANDLE = 0x00000013,
EFI_AMD64_HANDLE = 0x00000014,
IMAGE_BASE_ADDR = 0x00000015
};
struct tag_start {
@ -72,6 +72,47 @@ struct mmap_tag_entry {
uint32_t type;
} __attribute__ ((__packed__));
struct vbe_tag {
uint16_t mode;
uint16_t v2_segment;
uint16_t v2_offset;
uint16_t v2_length;
uint8_t control_info[512];
uint8_t mode_info[256];
} __attribute__ ((__packed__));
enum color_types {
PALETTE = 0x00,
RGB = 0x01,
TEXT = 0x02
};
struct fbuf_tag {
uint32_t address_low;
uint32_t address_high;
uint32_t pitch;
uint32_t width;
uint32_t height;
uint8_t bpp;
uint8_t color_type;
uint8_t padding;
} __attribute__ ((__packed__));
struct fbuf_palette_entry {
uint8_t red;
uint8_t green;
uint8_t blue;
} __attribute__ ((__packed__));
struct fbuf_rgb_info {
uint8_t red_pos;
uint8_t red_mask;
uint8_t green_pos;
uint8_t green_mask;
uint8_t blue_pos;
uint8_t blue_mask;
} __attribute__ ((__packed__));
struct boot_device_tag boot_device;
bool have_boot_device = false;
bool have_mmap = false;
@ -88,14 +129,26 @@ enum error_codes {
struct tag_start *tag_pointer;
uint32_t main(void) {
put_sz("Multiboot info:\n");
put_sz("Multiboot info:");
while (tag_pointer->type) {
put_sz(" Tag type 0x");
put_sz("\n Tag type 0x");
put_32_hex(tag_pointer->type);
put_sz(" with size 0x");
put_32_hex(tag_pointer->size);
switch (tag_pointer->type) {
case LOADER_NAME:
put_sz(": bootloader name\n ");
put_sz((uint8_t *)(tag_pointer + 1));
break;
case MEMORY_INFO:
put_sz(": memory size\n Lower memory: 0x");
put_32_hex((tag_pointer + 1)->type);
put_sz("\n Upper memory: 0x");
put_32_hex((tag_pointer + 1)->size);
break;
case BOOT_DEVICE:
boot_device = *(struct boot_device_tag *)(tag_pointer + 1);
have_boot_device = true;
@ -107,17 +160,15 @@ uint32_t main(void) {
if (boot_device.subpartition != 0xffffffff) {
put_sz("\n Subpartition number: ");
put_32_hex(boot_device.subpartition);
put_char('\n');
}
else
put_sz("\n No subpartition\n");
put_sz("\n No subpartition");
}
else
put_sz("\n No partition\n");
put_sz("\n No partition");
break;
case MEMORY_MAP:
{
case MEMORY_MAP: {
uint32_t size = *(uint32_t *)(tag_pointer + 1);
struct mmap_tag_entry *tag = (struct mmap_tag_entry *)(tag_pointer + 2);
struct mmap_tag_entry *end = (struct mmap_tag_entry *)((uint32_t)tag_pointer + tag_pointer->size);
@ -177,7 +228,6 @@ uint32_t main(void) {
put_sz(" Total usable memory: 0x");
put_32_hex(usable);
put_char('\n');
bool dirty;
do {
@ -202,8 +252,70 @@ uint32_t main(void) {
have_mmap = true;
break;
}
case VBE_INFO: {
struct vbe_tag *vbe_info = (struct vbe_tag *)(tag_pointer + 1);
put_sz(": VBE information");
if (vbe_info->v2_length) {
put_sz("\n v2: 0x");
put_16_hex(vbe_info->v2_segment);
put_sz(":0x");
put_16_hex(vbe_info->v2_offset);
put_sz(" + 0x");
put_16_hex(vbe_info->v2_length);
}
put_sz("\n v3 mode: 0x");
put_16_hex(vbe_info->mode);
break;
}
case FBUF_INFO: {
struct fbuf_tag *fbuf_info = (struct fbuf_tag *)(tag_pointer + 1);
put_sz(": framebuffer information\n Address: 0x");
put_32_hex(fbuf_info->address_high);
put_char(':');
put_32_hex(fbuf_info->address_low);
put_sz("\n Pitch: ");
put_32_dec(fbuf_info->pitch);
put_sz("B\n Size: ");
put_32_dec(fbuf_info->width);
put_sz(" x ");
put_32_dec(fbuf_info->height);
put_sz(" x ");
put_8_dec(fbuf_info->bpp);
switch (fbuf_info->color_type) {
case PALETTE:
put_sz("b\n Palette:");
uint32_t l = *(uint32_t *)(fbuf_info + 1);
struct fbuf_palette_entry *palette = (struct fbuf_palette_entry *)((uint32_t *)(fbuf_info + 1) + 1);
for (uint32_t i = 0; i < l; ++i) {
put_sz("\n #");
put_8_hex(palette[i].red);
put_8_hex(palette[i].green);
put_8_hex(palette[i].blue);
}
break;
case RGB:
put_sz("b\n RGB:");
//TODO
break;
case TEXT:
put_sz("b\n Text mode");
break;
default:
put_sz(": ignoring\n");
put_sz("b\n Unknown mode 0x");
put_8_hex(fbuf_info->color_type);
}
break;
}
case IMAGE_BASE_ADDR:
put_sz(": image address\n 0x");
put_32_hex(*(uint32_t *)(tag_pointer + 1));
break;
default:
put_sz(": ignoring");
}
tag_pointer = (struct tag_start *)(((uint32_t)tag_pointer + tag_pointer->size - 1 & 0xfffffff8) + 8);
@ -214,13 +326,17 @@ uint32_t main(void) {
if (!have_mmap)
return NO_MMAP;
put_sz("\nReady!\n Memory map size: 0x");
put_sz("\n\nReady!\n Memory map size: 0x");
put_32_hex(sizeof(struct mmap_entry) * MMAP_SIZE);
put_sz("\n Process table size: 0x");
put_32_hex(sizeof(struct proc_info) * 65536);
put_sz("\n File table size: 0x");
put_32_hex(sizeof(struct file_info) * 65536);
put_char('\n');
put_sz("\n\n");
put_sz("No file support yet. Halting.");
while (1)
asm ("hlt");
uint8_t rc_buffer[4096];

45
src/kernel/vga.c
View file

@ -21,10 +21,11 @@ OF THIS SOFTWARE.
#include "serial.h"
#include <stdbool.h>
uint16_t cursor_pos = 0;
uint8_t color = 0x70;
#define VGA_BUFFER ((uint8_t *)0x000b8000)
#define cols 80
#define rows 25
uint16_t cursor_pos = 0;
uint8_t color = 0x70;
void clear(void) {
uint32_t fill = 0x00200020 | (color << 24) | (color << 8);
@ -82,6 +83,46 @@ void put_32_hex(uint32_t n) {
}
}
void put_16_hex(uint16_t n) {
for (uint8_t i = 0; i < 4; ++i) {
put_char("0123456789abcdef"[n >> 12]);
n <<= 4;
}
}
void put_8_hex(uint8_t n) {
put_char("0123456789abcdef"[n >> 4]);
put_char("0123456789abcdef"[n & 0x0f]);
}
void put_32_dec(uint32_t n) {
if (n) {
bool sig = false;
for (uint32_t m = 1000000000; m; m /= 10) {
if (((n / m) % 10) || sig) {
sig = true;
put_char((uint8_t)'0' + (n / m) % 10);
}
}
}
else
put_char('0');
}
void put_8_dec(uint8_t n) {
if (n) {
bool sig = false;
for (uint8_t m = 100; m; m /= 10) {
if (((n / m) % 10) || sig) {
sig = true;
put_char((uint8_t)'0' + (n / m) % 10);
}
}
}
else
put_char('0');
}
void move_cursor(uint8_t col, uint8_t row) {
cursor_pos = (col + row * cols) * 2;
}

5
src/kernel/vga.h
View file

@ -22,11 +22,14 @@ OF THIS SOFTWARE.
#ifndef VGA_H
#define VGA_H
#define VGA_BUFFER ((uint8_t *)0x000b8000)
void clear(void);
void put_char(uint8_t ch);
void put_sz(uint8_t *s);
void put_32_hex(uint32_t n);
void put_16_hex(uint16_t n);
void put_8_hex(uint8_t n);
void put_32_dec(uint32_t n);
void put_8_dec(uint8_t n);
void move_cursor(uint8_t col, uint8_t row);
void set_color(uint8_t c);