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#include "def.h"
#include "gfx.h"
#include "halt.h"
#include "heap.h"
#include "font.h"
#include "interrupts.h"
#include "pic.h"
#include "io.h"
#include "ata.h"
#include "pci.h"
#include "ps2.h"
#include "thread.h"
#include "shell.h"
#include "fs.h"
#include "gfx.h"
#include "clock.h"
#include "rng.h"
#include "debug.h"
typedef enum {
MEM_USABLE = 1,
MEM_RESERVED = 2,
} mem_region_type;
typedef struct __attribute__((packed)) {
void *start;
usize size;
usize type;
} mem_region;
char keymap[256] = { '\0' };
void keyboard_handler()
{
str buffer = NILS;
usize cap = 0;
print(S("$ "));
bool shift = false;
for (;;) {
event *e = yield(nil);
u8 code = e->data.scancode;
kfree(e);
bool stop = (code & (1 << 7)) != 0;
code &= ~(1 << 7);
char c = keymap[code*2+shift];
if (c == '\xe') {
shift = !stop;
} else if (stop) {
} else if (c == '\b') {
if (buffer.len > 0) {
print_char(c);
buffer.len--;
}
} else if (c == '\n') {
print_char(c);
shell_run_cmd(buffer);
buffer.len = 0;
print(S("$ "));
} else if (c != '\0') {
print_char(c);
if (buffer.len == cap)
buffer.data = krealloc(buffer.data, cap = cap ? cap*2 : 1);
buffer.data[buffer.len++] = c;
}
}
}
void kmain()
{
// PML3
for (u64 page = 0; page < 512*512; page++)
((u64 *) 0x200000)[page] = (page << 30) | 0b10000011; // bit 7 is for huge pages
// PML4
for (u64 tbl = 0; tbl < 512; tbl++)
((u64 *) 0x1000)[tbl] = (0x200000 + tbl * 0x1000) | 0b11;
#define MMAP for (mem_region *mreg = (void *) 0x500; mreg->start != nil; mreg++)
// heap init
heap_init();
MMAP {
// remove anything between 0x100000 and 0x400000. it is used for kernel and page tables
usize start = (usize) mreg->start;
if (start >= 0x100000 && start < 0x400000) {
if (start + mreg->size <= 0x400000) {
mreg->size = 0; // kill it
} else {
mreg->size = start + mreg->size - 0x400000;
mreg->start = (void *) 0x400000;
}
}
// add to heap
if (mreg->type == MEM_USABLE) // usable
heap_add(mreg->start, mreg->size);
}
// font init
font_init();
font_set_size(1);
font_load_builtin();
font_clear_screen();
print(S("welcome to cuddles\n"));
// memory map
print(S("heap memory:\n"));
MMAP {
print_num_pad((u64) mreg->start, 16, 16, ' ');
print(S(" | "));
print_num_pad((u64) mreg->start + mreg->size, 16, 16, ' ');
print(S(" | "));
print_dec(mreg->type);
print(S("\n"));
}
print(S("gfx framebuffer at "));
print_hex(gfx_info->framebuffer);
print(S("-"));
print_hex((u64) gfx_info->framebuffer + gfx_info->pitch * gfx_info->height);
print(S("\n"));
u32 vendor[4];
asm volatile("cpuid":"=a"(vendor[0]),"=b"(vendor[1]),
"=c"(vendor[3]),"=d"(vendor[2]):"a"(0));
print(S("cpu vendor: "));
print((str) { 12, (void *) &vendor[1] });
print(S("\n"));
u32 features;
asm volatile("cpuid":"=d"(features):"a"(1):"ebx","ecx");
print(S("cpu features: "));
print_num_pad(features, 2, 32, '0');
print(S("\n"));
srand(clock_cycles());
interrupts_init();
pic_init();
thread_init();
ata_init();
ps2_init();
debug_init();
pci_init();
shell_run_cmd(S("run init"));
thread *keyboard_thread = thread_create(S("keyboard"), &keyboard_handler);
irq_services[1] = keyboard_thread;
unmask_irq(1);
unmask_irq(2);
clock_init();
enable_irqs();
thread_sched(nil, nil);
freeze();
}
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