réplica de
https://github.com/Arnau478/quark.git
synced 2024-05-05 17:16:30 +02:00
77 líneas
2,3 KiB
C
77 líneas
2,3 KiB
C
#include <stdint.h>
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#include "lib/stdio.h"
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#include "hal/hal.h"
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#include "drivers/keyboard.h"
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#include "drivers/uart.h"
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#include "drivers/initrd.h"
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#include "fs/vfs.h"
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#include "arch/i686/mm/pmm.h"
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#include "arch/i686/mm/vmm.h"
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#include "multiboot.h"
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#include "lib/debug.h"
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#include "arch/i686/fdc.h"
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#include "shell.h"
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extern uint8_t end; // Kernel end
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void __attribute__((cdecl)) kmain(multiboot_info_t *multiboot_info){
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// Clear screen
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clear_screen();
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// Initialize chip-specific hardware
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hal_initialize();
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// Initialize serial
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uart_initialize(COM1, 2);
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// Initialize drivers
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keyboard_initialize();
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// Initialize physical memory manager
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uint32_t mem_size = 1024 + multiboot_info->mem_lower + multiboot_info->mem_upper*64;
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i686_pmm_initialize(mem_size, (int)(&end));
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// Memory map
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debug_printf("= Memory map =\n");
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for(int i = 0; i < multiboot_info->mmap_length; i += sizeof(multiboot_memory_map_t)){
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multiboot_memory_map_t *memory_map = (multiboot_memory_map_t *)(multiboot_info->mmap_addr + i);
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debug_printf("Start Addr: 0x%x%x | Length: 0x%x%x | Size: 0x%x | Type: %i\n", memory_map->addr_h, memory_map->addr_l, memory_map->len_h, memory_map->len_l, memory_map->size, memory_map->type);
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if(memory_map->type == 1){
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i686_pmm_init_region(memory_map->addr_l, memory_map->len_l);
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}
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}
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i686_pmm_deinit_region(0x100000, (int)(&end) - 0x100000); // Deinit the section the kernel is in
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// Initialize virtual memory
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i686_vmm_initialize();
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// Floppy disk controller
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i686_fdc_set_working_drive(0);
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i686_fdc_initialize();
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debug_printf("Multiboot modules: (%d)\n", multiboot_info->mods_count);
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if(multiboot_info->mods_count == 1){
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debug_printf("Loading initrd...\n");
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multiboot_module_t *module;
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module = (multiboot_module_t *)multiboot_info->mods_addr;
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debug_printf("Initrd module structure: start=0x%x end=0x%x cmdline=%s\n", module->start, module->end, module->cmdline);
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debug_printf("%d\n", module->start);
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}
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else{
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debug_printf("WARNING: mods_count is not 1, not loading the initrd");
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}
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// Initialize FS
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vfs_initialize();
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// Run shell
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shell();
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// Halt at end
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debug_printf("Kernel execution ended\n");
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for(;;);
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}
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