boot.c File Reference

Bootloader. More...

Macros
#define	KERNEL_STACK_SIZE   0x100000
	Size of the kernel's stack.
#define	SERIAL_COM1   (0x03F8)
	Serial port for QEMU.

Functions
void	boot_kernel (uint32_t stack_pointer, uint32_t entry, struct boot_info_t *boot_info)
	External function implemented in boot.S. More...
static void	__outportb (uint16_t port, uint8_t data)
	Use this to write to I/O ports to send bytes to devices. More...
static void	__debug_putchar (char c)
	Writes the given character on the debug port. More...
static void	__debug_puts (char *s)
	Writes the given string on the debug port. More...
static uint32_t	__align_rup (uint32_t addr, uint32_t value)
	Align memory address to the specified value (round up). More...
static uint32_t	__align_rdown (uint32_t addr, uint32_t value)
	Align memory address to the specified value (round down). More...
static void	__setup_pages (uint32_t pfn_virt_start, uint32_t pfn_phys_start, uint32_t pfn_count)
	Prepares the page frames. More...
static void	__setup_boot_paging (void)
	Setup paging mapping all the low memory to two places: one is the physical address of the memory itself the other is in the virtual kernel address space.
static void	__get_kernel_low_high (elf_header_t *elf_hdr, uint32_t *virt_low, uint32_t *virt_high)
	Extract the starting and ending address of the kernel. More...
static uint32_t	__get_address_after_modules (multiboot_info_t *header)
	Returns the first address after the modules. More...
static void	__relocate_kernel_image (elf_header_t *elf_hdr)
	Relocate the kernel image. More...
void	boot_main (uint32_t magic, multiboot_info_t *header, uint32_t esp)
	Entry point of the bootloader. More...

Variables
char	_bootloader_start []
	Linker symbols for where the .data section of kernel.bin.o. More...
char	_bootloader_end []
	Linker symbol for where the bootloader ends.
static boot_info_t	boot_info
	Boot info provided to the kmain function.
static page_directory_t	boot_pgdir
	Boot page directory.
static page_table_t	boot_pgtables [1024]
	Boot page tables.

Detailed Description

Bootloader.

Copyright

(c) 2014-2024 This file is distributed under the MIT License. See LICENSE.md for details.