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Kernel Initialization
[Kernel]

Functions
void	print_ok ()
	Print the [ OK ] tag.
void	print_error ()
	Print the [ ERROR ] tag.
void	k_main ()
	This is the beginning of the kernel!!! You can figure it as the init task... Warning: To obviate memory faults, first of all, we MUST initialize paging with the init_paging() routine.
Variables
task_t *	curr_task
	A pointer to the current running task structure. Declared in task.c.
queue_t *	ready_queue
	A pointer to ready queue. Declared in task.c.
multiboot_info_t *	boot_info
	The multiboot information pointer from GRUB.
dword	PHYS_MEM_DIM
	The physical memory dimension. Initialized in paging.c.
int	i
	Used to create initial consoles.

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Detailed Description

The initialization routine.

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Function Documentation

void k_main (    )

This is the beginning of the kernel!!! You can figure it as the init task... Warning: To obviate memory faults, first of all, we MUST initialize paging with the init_paging() routine. Definition at line 148 of file main.c. { // First of all we MUST initialize paging!!! // init_paging(); // Initialize video // init_video(); init_main_console(); // Now we can print some informations... // kprintf("\n\r<Starting initialization>\n\r"); kprintf("\n\rKernel is running at virtual address:"); kprintf("\r %#010x\n\r", (dword)&k_main); // Get some multiboot informations // boot_info = (multiboot_info_t *)PHYSICAL((dword)boot_info); if (boot_info->flags & 0x02) { // set_color(DEFAULT_COLOR); kprintf( "Total amount of conventional memory:"); kprintf("\r %uKB\n\r", ((dword)boot_info->mem_lower)); kprintf( "Total amount of extended memory:"); kprintf("\r %uMB\n\r", PHYS_MEM_DIM/1024/1024); kprintf("\n\r"); } else { set_color(LIGHT_RED); kprintf("\n\rError reading multiboot informations... halting!"); } // Initialize clock // kprintf("Initializing system clock..."); init_clock(); print_ok(); // Reprogram the PIC 8259 (interrupt controller) // kprintf("Reprogramming PIC 8259..."); reprogram_PIC(); print_ok(); // Installing GDT // kprintf("Installing kernel GDT..."); install_GDT(); print_ok(); // Installing IDT // kprintf("Installing kernel IDT..."); install_IDT(); print_ok(); // Initialize memory manager // kprintf("Initializing memory manager..."); kmalloc_init(); print_ok(); // Initialize memory manager // kprintf("Initializing DMA allocator..."); dma_alloc_init(); print_ok(); // Initialize multitasking // kprintf("Initializing multitasking..."); init_multitasking(); print_ok(); // Initialize the Real-Time Clock // kprintf("Initializing Real-Time Clock..."); time_init(); print_ok(); // Initialize the keyboard // kprintf("Initializing keyboard..."); init_keyboard(); print_ok(); // Initialize the floppy // kprintf("Initializing floppy driver..."); if ( init_floppy() ) print_ok(); else print_error(); // Auto-mount FAT12 on the floppy // kprintf("Auto-mounting FAT12 file-system on floppy..."); if ( Read_FAT() ) print_ok(); else print_error(); // ******************* Luca Giovacchini ************************* // Initialize the ide driver // kprintf("Initializing ide driver..."); // init ide return error that are not critical so we will ignore that InitIde(); print_ok(); ShowIdeSubData(); kprintf("\n\r"); // ************************************************************** // ********************** Filippo Brogi ************************* // Initialize the ext2 file-system // kprintf("Auto-mounting ext2 file-system on /dev/hda1..."); if ( init_ext2() ) print_ok(); else { kprintf("\n\rUnable to read the super block!!!"); print_error(); } // ************************************************************** // Initialize virtual consoles // kprintf("Creating virtual consoles..."); create_virtual_console(); set_color(GREEN); print_ok(); // Initialization complete // kprintf("\n\r<Initialization complete>\n\r"); set_color(WHITE); kprintf("\n\r*** Welcome to %s - Kernel [v%s] ***\n\r", KERNEL_NAME, KERNEL_VERSION); set_color(DEFAULT_COLOR); // Create a shell task for every console // for(i=1; i<=10; i++) { curr_task->console = i; if ( i>1 ) clrscr(); create_kthread(&shell, "MiniShell"); // create_process(&shell, &shell, 0, "MiniShell", KERNEL_PRIVILEGE); } curr_task->console=1; set_curr_console(1); // Well done!!! // auto_kill( 0 ); }

void print_error (    )

Print the [ ERROR ] tag. Definition at line 132 of file main.c. { set_color(DEFAULT_COLOR); kprintf("\r [ ]"); set_color(LIGHT_RED); gotoxy(49, -1); kprintf("ERROR\n\r"); set_color(DEFAULT_COLOR); }

void print_ok (    )

Print the [ OK ] tag. Definition at line 121 of file main.c. { set_color(DEFAULT_COLOR); kprintf("\r [ ]"); set_color(GREEN); gotoxy(50, -1); kprintf("OK\n\r"); set_color(DEFAULT_COLOR); }

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Variable Documentation

multiboot_info_t* boot_info

The multiboot information pointer from GRUB. Definition at line 114 of file main.c.

task_t* curr_task

A pointer to the current running task structure. Declared in task.c. Definition at line 110 of file main.c.

int i

Used to create initial consoles. Definition at line 118 of file main.c.

dword PHYS_MEM_DIM

The physical memory dimension. Initialized in paging.c. Definition at line 116 of file main.c.

queue_t* ready_queue

A pointer to ready queue. Declared in task.c. Definition at line 112 of file main.c.

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