github.com/mvdan/u-root-coreutils@v0.0.0-20230122170626-c2eef2898555/cmds/exp/uefiboot/main.go (about)

     1  // Copyright 2021 the u-root Authors. All rights reserved
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // uefiboot loads the firmware generated by EDK2's UefiPayLoadPkg to boot a UEFI based OS
     6  //
     7  // Synopsis:
     8  //     uefiboot [ARGS] payload
     9  //
    10  // Options:
    11  //     -d: print debug output
    12  //     -i n: Address where to load the payload image
    13  //     -serial_addr  n: serial IO port address
    14  //     -serial_width n: serial port register width
    15  //     -serial_hertz n: serial port input hertz
    16  //     -serial_baud  n: serial port baud rate
    17  
    18  package main
    19  
    20  import (
    21  	"flag"
    22  	"log"
    23  	"math"
    24  
    25  	"github.com/mvdan/u-root-coreutils/pkg/boot"
    26  	"github.com/mvdan/u-root-coreutils/pkg/boot/uefi"
    27  )
    28  
    29  var (
    30  	debug       = flag.Bool("d", false, "Print debug output")
    31  	imageBase   = flag.Uint64("i", 0x800000, "Where to load payload image")
    32  	serialAddr  = flag.Uint("serial_addr", 0x3f8, "Serial IO port address")
    33  	serialWidth = flag.Uint("serial_width", 1, "Serial port reg width")
    34  	serialHertz = flag.Uint("serial_hertz", 1843200, "Serial port input hertz")
    35  	serialBaud  = flag.Uint("serial_baud", 115200, "Serial port baud rate")
    36  )
    37  
    38  var v = func(string, ...interface{}) {}
    39  
    40  func main() {
    41  	flag.Parse()
    42  	if len(flag.Args()) != 1 {
    43  		log.Fatal("Usage: uefiboot <payload>")
    44  	}
    45  	fv, err := uefi.New(flag.Args()[0])
    46  	if err != nil {
    47  		log.Fatal(err)
    48  	}
    49  	if *serialAddr > math.MaxUint32 {
    50  		log.Fatal("Unsupported: serial_addr is greater than uint32.")
    51  	}
    52  	fv.ImageBase, fv.SerialConfig = uintptr(*imageBase), uefi.SerialPortConfig{
    53  		Type:       uefi.SerialPortTypeIO,
    54  		BaseAddr:   uint32(*serialAddr),
    55  		RegWidth:   uint32(*serialWidth),
    56  		InputHertz: uint32(*serialHertz),
    57  		Baud:       uint32(*serialBaud),
    58  	}
    59  
    60  	if err := fv.Load(*debug); err != nil {
    61  		log.Fatal(err)
    62  	}
    63  
    64  	if err := boot.Execute(); err != nil {
    65  		log.Fatal(err)
    66  	}
    67  }