1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0+ 3# 4# Script to build an EFI thing suitable for booting with QEMU, possibly running 5# it also. 6 7# This just an example. It assumes that 8 9# - you build U-Boot in ${ubdir}/<name> where <name> is the U-Boot board config 10# - /mnt/x is a directory used for mounting 11# - you have access to the 'pure UEFI' builds for QEMU 12# 13# UEFI binaries for QEMU used for testing this script: 14# 15# OVMF-pure-efi.i386.fd at 16# https://drive.google.com/file/d/1jWzOAZfQqMmS2_dAK2G518GhIgj9r2RY/view?usp=sharing 17 18# OVMF-pure-efi.x64.fd at 19# https://drive.google.com/file/d/1c39YI9QtpByGQ4V0UNNQtGqttEzS-eFV/view?usp=sharing 20 21set -e 22 23usage() { 24 echo "Usage: $0 [-a | -p] [other opts]" 1>&2 25 echo 1>&2 26 echo " -a - Package up the app" 1>&2 27 echo " -o - Use old EFI app build (before 32/64 split)" 1>&2 28 echo " -p - Package up the payload" 1>&2 29 echo " -P - Create a partition table" 1>&2 30 echo " -r - Run QEMU with the image" 1>&2 31 echo " -s - Run QEMU with serial only (no display)" 1>&2 32 echo " -w - Use word version (32-bit)" 1>&2 33 exit 1 34} 35 36# 32- or 64-bit EFI 37bitness=64 38 39# app or payload ? 40type=app 41 42# create a partition table and put the filesystem in that (otherwise put the 43# filesystem in the raw device) 44part= 45 46# run the image with QEMU 47run= 48 49# run QEMU without a display (U-Boot must be set to stdout=serial) 50serial= 51 52# before the 32/64 split of the app 53old= 54 55# Set ubdir to the build directory where you build U-Boot out-of-tree 56# We avoid in-tree build because it gets confusing trying different builds 57ubdir=/tmp/b/ 58 59while getopts "aopPrsw" opt; do 60 case "${opt}" in 61 a) 62 type=app 63 ;; 64 p) 65 type=payload 66 ;; 67 r) 68 run=1 69 ;; 70 s) 71 serial=1 72 ;; 73 w) 74 bitness=32 75 ;; 76 o) 77 old=1 78 ;; 79 P) 80 part=1 81 ;; 82 *) 83 usage 84 ;; 85 esac 86done 87 88run_qemu() { 89 extra= 90 if [[ "${bitness}" = "64" ]]; then 91 qemu=qemu-system-x86_64 92 bios=OVMF-pure-efi.x64.fd 93 else 94 qemu=qemu-system-i386 95 bios=OVMF-pure-efi.i386.fd 96 fi 97 if [[ -n "${serial}" ]]; then 98 extra="-display none -serial mon:stdio" 99 fi 100 echo "Running ${qemu}" 101 # Use 512MB since U-Boot EFI likes to have 256MB to play with 102 "${qemu}" -bios "${bios}" \ 103 -m 512 \ 104 -drive id=disk,file="${IMG}",if=none,format=raw \ 105 -nic none -device ahci,id=ahci \ 106 -device ide-hd,drive=disk,bus=ahci.0 ${extra} 107} 108 109setup_files() { 110 echo "Packaging ${BUILD}" 111 mkdir -p $TMP 112 cat >$TMP/startup.nsh <<EOF 113fs0:u-boot-${type}.efi 114EOF 115 sudo cp ${ubdir}/${BUILD}/u-boot-${type}.efi $TMP 116 117 # Can copy in other files here: 118 #sudo cp ${ubdir}/$BUILD/image.bin $TMP/chromeos.rom 119 #sudo cp /boot/vmlinuz-5.4.0-77-generic $TMP/vmlinuz 120} 121 122# Copy files into the filesystem 123copy_files() { 124 sudo cp $TMP/* $MNT 125} 126 127# Create a filesystem on a raw device and copy in the files 128setup_raw() { 129 mkfs.vfat "${IMG}" >/dev/null 130 sudo mount -o loop "${IMG}" $MNT 131 copy_files 132 sudo umount $MNT 133} 134 135# Create a partition table and put the filesystem in the first partition 136# then copy in the files 137setup_part() { 138 # Create a gpt partition table with one partition 139 parted "${IMG}" mklabel gpt 2>/dev/null 140 141 # This doesn't work correctly. It creates: 142 # Number Start End Size File system Name Flags 143 # 1 1049kB 24.1MB 23.1MB boot msftdata 144 # Odd if the same is entered interactively it does set the FS type 145 parted -s -a optimal -- "${IMG}" mkpart boot fat32 1MiB 23MiB 146 147 # Map this partition to a loop device 148 kp="$(sudo kpartx -av ${IMG})" 149 read boot_dev<<<$(grep -o 'loop.*p.' <<< "${kp}") 150 test "${boot_dev}" 151 dev="/dev/mapper/${boot_dev}" 152 153 mkfs.vfat "${dev}" >/dev/null 154 155 sudo mount -o loop "${dev}" $MNT 156 157 copy_files 158 159 # Sync here since this makes kpartx more likely to work the first time 160 sync 161 sudo umount $MNT 162 163 # For some reason this needs a sleep or it sometimes fails, if it was 164 # run recently (in the last few seconds) 165 if ! sudo kpartx -d "${IMG}" > /dev/null; then 166 sleep .5 167 sudo kpartx -d "${IMG}" > /dev/null || \ 168 echo "Failed to remove ${boot_dev}, use: sudo kpartx -d ${IMG}" 169 fi 170} 171 172TMP="/tmp/efi${bitness}${type}" 173MNT=/mnt/x 174BUILD="efi-x86_${type}${bitness}" 175IMG=try.img 176 177if [[ -n "${old}" && "${bitness}" = "32" ]]; then 178 BUILD="efi-x86_${type}" 179fi 180 181setup_files 182 183qemu-img create "${IMG}" 24M >/dev/null 184 185if [[ -n "${part}" ]]; then 186 setup_part 187else 188 setup_raw 189fi 190 191if [[ -n "${run}" ]]; then 192 run_qemu 193fi 194