Enrico Fraccaroli
83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
/// MentOS, The Mentoring Operating system project
|
|
/// @file boot.h
|
|
/// @brief Bootloader structures
|
|
/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
|
|
/// See LICENSE.md for details.
|
|
|
|
#pragma once
|
|
|
|
#include "multiboot.h"
|
|
|
|
/// @brief Mentos structure to communicate bootloader info to the kernel
|
|
typedef struct boot_info_t {
|
|
/// Boot magic number.
|
|
unsigned int magic;
|
|
|
|
/*
|
|
* Bootloader physical range
|
|
* it can be overwritten to do other things
|
|
* */
|
|
|
|
/// bootloader code start
|
|
unsigned int bootloader_phy_start;
|
|
/// bootloader code end
|
|
unsigned int bootloader_phy_end;
|
|
|
|
/*
|
|
* Kernel virtual and physical range
|
|
* must not be overwritten
|
|
* it's assumed to be contiguous, so section holes are just wasted space
|
|
* */
|
|
|
|
/// kernel physical code start
|
|
unsigned int kernel_phy_start;
|
|
/// kernel physical code end
|
|
unsigned int kernel_phy_end;
|
|
|
|
/// kernel code start
|
|
unsigned int kernel_start;
|
|
/// kernel code end
|
|
unsigned int kernel_end;
|
|
|
|
/// kernel size.
|
|
unsigned int kernel_size;
|
|
|
|
/// Address after the modules.
|
|
unsigned int module_end;
|
|
|
|
/*
|
|
* Range of addressable lowmemory, is memory that is available
|
|
* (not used by the kernel executable nor by the bootloader)
|
|
* and can be accessed by the kernel at any time
|
|
* */
|
|
|
|
/// lowmem physical addressable start
|
|
unsigned int lowmem_phy_start;
|
|
/// lowmem physical addressable end
|
|
unsigned int lowmem_phy_end;
|
|
|
|
/// lowmem addressable start
|
|
unsigned int lowmem_start;
|
|
/// lowmem addressable end
|
|
unsigned int lowmem_end;
|
|
|
|
/// stack end (comes after lowmem_end, and is the end of the low mapped memory)
|
|
unsigned int stack_end;
|
|
|
|
/*
|
|
* Range of non-addressable highmemory, is memory that can be
|
|
* accessed by the kernel only if previously mapped
|
|
* */
|
|
|
|
/// highmem addressable start
|
|
unsigned int highmem_phy_start;
|
|
/// highmem addressable end
|
|
unsigned int highmem_phy_end;
|
|
|
|
/// multiboot info
|
|
multiboot_info_t *multiboot_header;
|
|
|
|
/// stack suggested start address (also set by the bootloader)
|
|
unsigned int stack_base;
|
|
} boot_info_t;
|