123 lines
4.0 KiB
C
123 lines
4.0 KiB
C
#include "shell.h"
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#include "fetch.h"
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#include "../libc/string.h"
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#include "../libc/stdio.h"
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#include "../drivers/tty.h"
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#include "../drivers/ports.h"
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#include "../drivers/timer.h"
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void helper() {
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puts("\nList of available commands:\n"
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"\nhelp - Print this helper"
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"\nint - Test some interrupts"
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"\nbanner - Show banner"
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"\nclear, cls - Clear the screen"
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"\nregs - Prints register dump"
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"\ntimer - Prints timer tick"
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"\nabout - About this kernel"
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"\nreboot - Reboot the system"
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);
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}
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void test_interrupts() {
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// Testing some interrupts
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asm("int $0"); // Division by zero
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asm("int $4"); // Stack overflow
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asm("int $1"); // Page fault
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}
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void about() {
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printf_color("\n====== IceOS v0.0.1 (c) 2019 Marco 'icebit' Cetica ======\n\n",
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LIGHT_CYAN, BLACK);
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printf_color(
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"iceOS is a x86 monolithic kernel written in C from scratch.\n"
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"This project doesn't aim to be a fully functional operating system\n"
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"with tons of drivers and graphical applications,\nit's just a learning tool "
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"to teach myself concepts like\nOperating Systems, Computer Architecture and Digital Electronics.\n"
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"\n\n"
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"iceOS comes with the following features:\n"
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"- Bare metal booting;\n"
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"- VGA driver;\n"
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"- Interrupts implementation;\n"
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"- PIC & PIT implementation;\n"
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"- PS2 driver;\n"
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"- Support for x86 architecture;\n"
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"- GRUB as bootloader;\n",
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LIGHT_GREEN, BLACK);
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}
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void register_dump() {
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register uint32_t eax_v asm("eax");
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register uint32_t ebx_v asm("ebx");
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register uint32_t ecx_v asm("ecx");
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register uint32_t edx_v asm("edx");
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register uint32_t esx_v asm("esi");
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register uint32_t edi_v asm("edi");
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register uint32_t ebp_v asm("ebp");
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register uint32_t esp_v asm("esp");
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printf_color("\n===================================\n"
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" BEGIN 32 BITS CPU REGISTER DUMP \n"
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"===================================\n",
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LIGHT_BROWN, BLACK);
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printf(" EAX: %x\n"
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" EBX: %x\n"
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" ECX: %x\n"
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" EDX: %x\n"
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" ESX: %x\n"
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" EDI: %x\n"
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" EBP: %x\n"
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" ESP: %x\n",
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eax_v, ebx_v, ecx_v, edx_v, esx_v, edi_v, ebp_v, esp_v);
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printf_color("\n==================================\n"
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" END 32 BITS CPU REGISTER DUMP \n"
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"==================================\n",
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LIGHT_BROWN, BLACK);
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}
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void timer_dump() {
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uint8_t buf[8];
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uitoa(tick, buf, 10);
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printf_color("\nTicks since boot: ",
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LIGHT_GREEN, BLACK);
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printf_color((const char*)buf,
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LIGHT_CYAN, BLACK);
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}
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void reboot() {
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uint8_t tmp;
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asm("cli"); // First disable all interrupts
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// Clear keyboard buffers
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do {
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tmp = inb(0x64); // Keyboard interface
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if(check_flag(tmp, 0) != 0)
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inb(0x60); // Clear keyboard data
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} while(check_flag(tmp, 1) != 0);
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outb(0x64, 0xFE); // Reset the CPU
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}
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void processCommand(uint8_t *cmd) {
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if(strcmp(cmd, (uint8_t*)"help") == 0)
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helper();
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else if(strcmp(cmd, (uint8_t*)"int") == 0)
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test_interrupts();
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else if(strcmp(cmd, (uint8_t*)"clear") == 0 || strcmp(cmd, (uint8_t*)"cls") == 0)
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clear_prompt();
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else if(strcmp(cmd, (uint8_t*)"about") == 0)
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about();
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else if(strcmp(cmd, (uint8_t*)"regs") == 0)
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register_dump();
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else if(strcmp(cmd, (uint8_t*)"timer") == 0)
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timer_dump();
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else if(strcmp(cmd, (uint8_t*)"fetch") == 0)
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system_fetcher();
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else if(strcmp(cmd, (uint8_t*)"reboot") == 0)
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reboot();
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else if(strcmp(cmd, (uint8_t*)"") == 0)
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puts("");
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else
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puts("\nCommand not found!");
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}
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