1/* 2 * Copyright 2017, Data61 3 * Commonwealth Scientific and Industrial Research Organisation (CSIRO) 4 * ABN 41 687 119 230. 5 * 6 * This software may be distributed and modified according to the terms of 7 * the GNU General Public License version 2. Note that NO WARRANTY is provided. 8 * See "LICENSE_GPLv2.txt" for details. 9 * 10 * @TAG(DATA61_GPL) 11 */ 12 13/* Configuration for MultiBoot, see MultiBoot Specification: 14 www.gnu.org/software/grub/manual/multiboot 15 We use a flags field of 3, indicating that we want modules loaded on page 16 boundaries and access to the memory map information. We do not set bit 16, 17 indicating that the structure of the image should be taken from its ELF 18 headers. */ 19 20#include <config.h> 21#include <machine/assembler.h> 22 23#define MULTIBOOT_HEADER_MAGIC 0x1BADB002 24 25#ifdef CONFIG_MULTIBOOT_GRAPHICS_MODE_NONE 26 #define MULTIBOOT_HEADER_FLAGS 3 27 #define MULTIBOOT_GRAPHICS_TEXT 0 28#else /* CONFIG_MULTIBOOT_GRAPHICS_MODE_NONE */ 29 #define MULTIBOOT_HEADER_FLAGS 7 30 #ifdef CONFIG_MULTIBOOT_GRAPHICS_MODE_TEXT 31 #define MULTIBOOT_GRAPHICS_TEXT 1 32 #else /* CONFIG_MULTIBOOT_GRAPHICS_MODE_TEXT */ 33 #define MULTIBOOT_GRAPHICS_TEXT 0 34 #endif /* CONFIG_MULTIBOOT_GRAPHICS_MODE_TEXT */ 35#endif /* CONFIG_MULTIBOOT_GRAPHICS_MODE_NONE */ 36 37/* These configs will be set if a graphics mode is set. if they aren't 38 * then we can put whatever in the multiboot header and it will be ignored. 39 * This seems to be the easiest way to make things compile */ 40#ifndef CONFIG_MULTIBOOT_GRAPHICS_MODE_HEIGHT 41#define CONFIG_MULTIBOOT_GRAPHICS_MODE_HEIGHT 0 42#endif 43#ifndef CONFIG_MULTIBOOT_GRAPHICS_MODE_WIDTH 44#define CONFIG_MULTIBOOT_GRAPHICS_MODE_WIDTH 0 45#endif 46#ifndef CONFIG_MULTIBOOT_GRAPHICS_MODE_DEPTH 47#define CONFIG_MULTIBOOT_GRAPHICS_MODE_DEPTH 0 48#endif 49 50.section .mbh 51#ifdef CONFIG_MULTIBOOT1_HEADER 52 /* MultiBoot header */ 53 .align 4 54 .long MULTIBOOT_HEADER_MAGIC; /*magic*/ 55 .long MULTIBOOT_HEADER_FLAGS; /*flags*/ 56 .long - MULTIBOOT_HEADER_FLAGS - MULTIBOOT_HEADER_MAGIC; /*checksum*/ 57 .long 0 /*header_addr*/ 58 .long 0 /*load_addr*/ 59 .long 0 /*load_end_addr*/ 60 .long 0 /*bss_end_addr*/ 61 .long 0 /*entry_addr*/ 62 .long MULTIBOOT_GRAPHICS_TEXT /*mode_type*/ 63 .long CONFIG_MULTIBOOT_GRAPHICS_MODE_WIDTH /*width*/ 64 .long CONFIG_MULTIBOOT_GRAPHICS_MODE_HEIGHT /*height*/ 65 .long CONFIG_MULTIBOOT_GRAPHICS_MODE_DEPTH /*depth*/ 66#endif 67#ifdef CONFIG_MULTIBOOT2_HEADER 68 .align 8 69 __mbi2_start: 70 /* magic multi-boot 2 header */ 71 .long 0xe85250d6 72 .long 0x0 73 .long (__mbi2_end - __mbi2_start) 74 .long -(0xe85250d6 + (__mbi2_end - __mbi2_start)) 75 /* end tag - type, flags, size */ 76 .word 0x0 77 .word 0x0 78 .long 0x8 79 __mbi2_end: 80#endif 81