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// SPDX-License-Identifier: GPL-2.0
#ifndef BOOTPARAMS_H
#define BOOTPARAMS_H
/**
* \file
*
* Provides definitions for the boot params structure passed to us by
* intermediate bootloaders when using the Linux boot protocol. This matches
* the Linux boot_params struct, although we only define the fields we are
* interested in.
*
*//*
* Copyright (C) 2020-2022 Martin Whitaker.
*/
#include <stdint.h>
#include <boot.h>
typedef struct {
uint8_t orig_x;
uint8_t orig_y;
uint16_t ext_mem_k;
uint16_t orig_video_page;
uint8_t orig_video_mode;
uint8_t orig_video_cols;
uint8_t flags;
uint8_t unused2;
uint16_t orig_video_ega_bx;
uint16_t unused3;
uint8_t orig_video_lines;
uint8_t orig_video_isVGA;
uint16_t orig_video_points;
uint16_t lfb_width;
uint16_t lfb_height;
uint16_t lfb_depth;
uint32_t lfb_base;
uint32_t lfb_size;
uint16_t cl_magic, cl_offset;
uint16_t lfb_linelength;
uint8_t red_size;
uint8_t red_pos;
uint8_t green_size;
uint8_t green_pos;
uint8_t blue_size;
uint8_t blue_pos;
uint8_t rsvd_size;
uint8_t rsvd_pos;
uint16_t vesapm_seg;
uint16_t vesapm_off;
uint16_t pages;
uint16_t vesa_attributes;
uint32_t capabilities;
uint32_t ext_lfb_base;
uint8_t _reserved[2];
} __attribute__((packed)) screen_info_t;
#define VIDEO_TYPE_VLFB 0x23 // VESA VGA in graphic mode
#define VIDEO_TYPE_EFI 0x70 // EFI graphic mode
#define VIDEO_TYPE_NONE 0xff // no video display (added for Memtest86+)
#define LFB_CAPABILITY_64BIT_BASE (1 << 1)
typedef struct {
uint32_t loader_signature;
uint32_t sys_tab;
uint32_t mem_desc_size;
uint32_t mem_desc_version;
uint32_t mem_map;
uint32_t mem_map_size;
uint32_t sys_tab_hi;
uint32_t mem_map_hi;
} __attribute__((packed)) efi_info_t;
#define EFI32_LOADER_SIGNATURE ('E' | ('L' << 8) | ('3' << 16) | ('2' << 24))
#define EFI64_LOADER_SIGNATURE ('E' | ('L' << 8) | ('6' << 16) | ('4' << 24))
typedef enum {
E820_NONE = 0,
E820_RAM = 1,
E820_RESERVED = 2,
E820_ACPI = 3, // usable as RAM once ACPI tables have been read
E820_NVS = 4
} e820_type_t;
typedef struct {
uint64_t addr;
uint64_t size;
uint32_t type;
} __attribute__((packed)) e820_entry_t;
typedef struct {
screen_info_t screen_info;
uint8_t unused1[0x070 - 0x040];
uint64_t acpi_rsdp_addr;
uint8_t unused2[0x1c0 - 0x078];
efi_info_t efi_info;
uint8_t unused3[0x1e8 - 0x1e0];
uint8_t e820_entries;
uint8_t unused4[0x214 - 0x1e9];
uint32_t code32_start;
uint8_t unused5[0x228 - 0x218];
uint32_t cmd_line_ptr;
uint8_t unused6[0x238 - 0x22c];
uint32_t cmd_line_size;
uint8_t unused7[0x2d0 - 0x23c];
e820_entry_t e820_map[E820_MAP_SIZE];
uint8_t unused8[0xeec - 0xd00];
} __attribute__((packed)) boot_params_t;
#endif /* BOOTPARAMS_H */
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