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void kmain();
void init()
{
kmain();
}
#include "def.h"
#include "paging.h"
#include "gfx.h"
#include "halt.h"
#include "heap.h"
#include "font.h"
#include "interrupts.h"
#include "pic.h"
#include "io.h"
#include "memory.h"
#include "ata.h"
#include "fs.h"
#include "string.h"
#include "pci.h"
void eat_whitespace(char **str)
{
while (**str == ' ' || **str == '\t')
(*str)++;
}
void kmain()
{
heap_init();
#define MMAP for (MemRegion *mreg = (void *) 0x500; mreg->start != nil; mreg++)
// backup memory map
usize n_mreg = 0;
MMAP n_mreg++;
MemRegion mregs[n_mreg];
{
usize i = 0;
MMAP mregs[i++] = *mreg;
}
// setup paging
MMAP page_region(mreg);
page_region(&(MemRegion) {
.start = (void *) (u64) gfx_info->framebuffer,
.size = gfx_info->pitch * gfx_info->height,
.used = MEM_RESERVED,
});
// heap init
MMAP heap_add_region(mreg);
// gfx init
gfx_set_area(0, 0, gfx_info->width, gfx_info->height, 0xFF000000);
font_init();
font_set_size(1);
font_load_classic();
// memory map
print("memory map:\n");
for (usize i = 0; i < n_mreg; i++) {
print_num((u64) mregs[i].start, 16, 16);
print(" | ");
print_num((u64) mregs[i].start + mregs[i].size, 16, 16);
print(" | ");
print_num(mregs[i].used, 10, 0);
print("\n");
}
init_interrupts();
pic_init();
ata_init();
file f = fs_read("init");
if (f.data == nil)
panic("no init script");
// this is horrible horrible horrible
// if you read this i am genuinely sorry
char *init = malloc(f.len+1);
char *init_orig = init;
init[f.len] = '\0';
memcpy(init, f.data, f.len);
free(f.data);
for (;;) {
eat_whitespace(&init);
if (*init == '\0')
break;
else if (*init == '\n') {
init++;
continue;
}
if (strncmp(init, "echo ", strlen("echo ")) == 0) {
init += strlen("echo ");
usize idx = find_char(init, '\n');
printn(init, idx);
print("\n");
init += idx;
} else if (strncmp(init, "cat ", strlen("cat ")) == 0) {
init += strlen("cat ");
usize idx = find_char(init, '\n');
char filename[idx+1];
filename[idx] = '\0';
memcpy(filename, init, idx);
file f = fs_read(filename);
if (f.data == nil) {
print("cat: file not found: ");
print(filename);
print("\n");
} else {
printn(f.data, f.len);
free(f.data);
}
init += idx;
} else if (strncmp(init, "font ", strlen("font ")) == 0) {
init += strlen("font ");
usize idx = find_char(init, '\n');
char filename[idx+1];
filename[idx] = '\0';
memcpy(filename, init, idx);
file f = fs_read(filename);
if (f.data == nil) {
print("font: file not found: ");
print(filename);
print("\n");
} else {
if (f.len == 16*256)
font_load_blob(f.data);
else
print("font: file has wrong size\n");
free(f.data);
}
init += idx;
} else if (strncmp(init, "img ", strlen("img ")) == 0) {
init += strlen("img ");
usize idx = find_char(init, '\n');
char filename[idx+1];
filename[idx] = '\0';
memcpy(filename, init, idx);
file f = fs_read(filename);
if (f.data == nil) {
print("img: file not found: ");
print(filename);
print("\n");
} else {
if (f.len < 2 * sizeof(u32))
print("img: missing header\n");
else {
u32 width = ((u32 *) f.data)[0];
u32 height = ((u32 *) f.data)[1];
if (f.len != 2 * sizeof(u32) + width * height * sizeof(color))
panic("img: invalid file size\n");
gfx_draw_img(gfx_info->width-width, 0, width, height, f.data + 2 * sizeof(u32));
}
free(f.data);
}
init += idx;
} else if (strncmp(init, "lspci", strlen("lspci")) == 0) {
pci_enumerate();
init += find_char(init, '\n');
} else if (strncmp(init, "charset_demo", strlen("charset_demo")) == 0) {
const u8 max = '~' - '!' + 1;
char str[max + 1];
str[max] = '\0';
for (u8 i = 0; i < max; i++)
str[i] = i + '!';
print("charset demo:\n");
print(str);
print("\n");
init += find_char(init, '\n');
} else {
print("unknown command: ");
usize idx = find_char(init, '\n');
printn(init, idx);
print("\n");
init += idx;
}
}
free(init_orig);
halt();
}
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