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https://github.com/memtest86plus/memtest86plus.git
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13d9569041
Most legacy BIOSs will support USB legacy keyboard emulation. Using that will avoid having to reserve memory for the USB drivers, and should improve the chance of having a working keyboard without having to work around various USB device quirks.
112 lines
3.0 KiB
C
112 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef BOOTPARAMS_H
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#define BOOTPARAMS_H
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/**
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* \file
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*
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* Provides definitions for the boot params structure passed to us by
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* intermediate bootloaders when using the Linux boot protocol. This matches
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* the Linux boot_params struct, although we only define the fields we are
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* interested in.
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*
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*//*
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* Copyright (C) 2020-2022 Martin Whitaker.
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*/
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#include <stdint.h>
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#include <boot.h>
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typedef struct {
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uint8_t orig_x;
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uint8_t orig_y;
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uint16_t ext_mem_k;
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uint16_t orig_video_page;
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uint8_t orig_video_mode;
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uint8_t orig_video_cols;
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uint8_t flags;
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uint8_t unused2;
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uint16_t orig_video_ega_bx;
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uint16_t unused3;
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uint8_t orig_video_lines;
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uint8_t orig_video_isVGA;
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uint16_t orig_video_points;
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uint16_t lfb_width;
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uint16_t lfb_height;
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uint16_t lfb_depth;
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uint32_t lfb_base;
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uint32_t lfb_size;
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uint16_t cl_magic, cl_offset;
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uint16_t lfb_linelength;
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uint8_t red_size;
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uint8_t red_pos;
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uint8_t green_size;
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uint8_t green_pos;
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uint8_t blue_size;
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uint8_t blue_pos;
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uint8_t rsvd_size;
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uint8_t rsvd_pos;
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uint16_t vesapm_seg;
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uint16_t vesapm_off;
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uint16_t pages;
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uint16_t vesa_attributes;
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uint32_t capabilities;
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uint32_t ext_lfb_base;
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uint8_t _reserved[2];
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} __attribute__((packed)) screen_info_t;
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#define VIDEO_TYPE_VLFB 0x23 // VESA VGA in graphic mode
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#define VIDEO_TYPE_EFI 0x70 // EFI graphic mode
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#define LFB_CAPABILITY_64BIT_BASE (1 << 1)
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typedef struct {
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uint32_t loader_signature;
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uint32_t sys_tab;
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uint32_t mem_desc_size;
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uint32_t mem_desc_version;
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uint32_t mem_map;
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uint32_t mem_map_size;
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uint32_t sys_tab_hi;
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uint32_t mem_map_hi;
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} __attribute__((packed)) efi_info_t;
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#define EFI32_LOADER_SIGNATURE ('E' | ('L' << 8) | ('3' << 16) | ('2' << 24))
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#define EFI64_LOADER_SIGNATURE ('E' | ('L' << 8) | ('6' << 16) | ('4' << 24))
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typedef enum {
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E820_NONE = 0,
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E820_RAM = 1,
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E820_RESERVED = 2,
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E820_ACPI = 3, // usable as RAM once ACPI tables have been read
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E820_NVS = 4
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} e820_type_t;
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typedef struct {
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uint64_t addr;
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uint64_t size;
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uint32_t type;
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} __attribute__((packed)) e820_entry_t;
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typedef struct {
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screen_info_t screen_info;
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uint8_t unused1[0x070 - 0x040];
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uint64_t acpi_rsdp_addr;
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uint8_t unused2[0x1c0 - 0x078];
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efi_info_t efi_info;
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uint8_t unused3[0x1e8 - 0x1e0];
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uint8_t e820_entries;
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uint8_t unused4[0x214 - 0x1e9];
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uint32_t code32_start;
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uint8_t unused5[0x228 - 0x218];
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uint32_t cmd_line_ptr;
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uint8_t unused6[0x238 - 0x22c];
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uint32_t cmd_line_size;
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uint8_t unused7[0x2d0 - 0x23c];
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e820_entry_t e820_map[E820_MAP_SIZE];
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uint8_t unused8[0xeec - 0xd00];
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} __attribute__((packed)) boot_params_t;
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#endif /* BOOTPARAMS_H */
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