249 lines
6.5 KiB
C
249 lines
6.5 KiB
C
/*
|
|
* Copyright (C) 2001-2003 Hewlett-Packard Co.
|
|
* Contributed by Stephane Eranian <eranian@hpl.hp.com>
|
|
* Contributed by Mike Johnston <johnston@intel.com>
|
|
* Contributed by Chris Ahna <christopher.j.ahna@intel.com>
|
|
*
|
|
* This file is part of the ELILO, the EFI Linux boot loader.
|
|
*
|
|
* ELILO is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* ELILO is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with ELILO; see the file COPYING. If not, write to the Free
|
|
* Software Foundation, 59 Temple Place - Suite 330, Boston, MA
|
|
* 02111-1307, USA.
|
|
*
|
|
* Please check out the elilo.txt for complete documentation on how
|
|
* to use this program.
|
|
*/
|
|
|
|
#include <efi.h>
|
|
#include <efilib.h>
|
|
|
|
#include "elilo.h"
|
|
#include "loader.h"
|
|
|
|
boot_params_t *param_start = NULL;
|
|
UINTN param_size = 0;
|
|
|
|
UINTN kernel_size = 0x400000; /* 4M (default x86 bzImage size limit) */
|
|
|
|
static INTN
|
|
bzImage_probe(CHAR16 *kname)
|
|
{
|
|
EFI_STATUS efi_status;
|
|
UINTN size;
|
|
fops_fd_t fd;
|
|
UINT8 bootsect[512];
|
|
|
|
DBG_PRT((L"probe_bzImage_boot()\n"));
|
|
|
|
if (!kname) {
|
|
ERR_PRT((L"kname == " PTR_FMT, kname));
|
|
free_kmem();
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Open kernel image.
|
|
*/
|
|
DBG_PRT((L"opening %s...\n", kname));
|
|
|
|
efi_status = fops_open(kname, &fd);
|
|
if (EFI_ERROR(efi_status)) {
|
|
ERR_PRT((L"Could not open %s.", kname));
|
|
free_kmem();
|
|
return -1;
|
|
}
|
|
/*
|
|
* Read boot sector.
|
|
*/
|
|
|
|
DBG_PRT((L"\nreading boot sector...\n"));
|
|
|
|
size = sizeof bootsect;
|
|
efi_status = fops_read(fd, bootsect, &size);
|
|
if (EFI_ERROR(efi_status) || size != sizeof bootsect) {
|
|
ERR_PRT((L"Could not read boot sector from %s.", kname));
|
|
fops_close(fd);
|
|
free_kmem();
|
|
return -1;
|
|
}
|
|
/*
|
|
* Verify boot sector signature.
|
|
*/
|
|
|
|
if (bootsect[0x1FE] != 0x55 || bootsect[0x1FF] != 0xAA) {
|
|
ERR_PRT((L"%s is not a bzImage kernel image.\n", kname));
|
|
fops_close(fd);
|
|
free_kmem();
|
|
return -1;
|
|
}
|
|
/*
|
|
* Check for out of range setup data size.
|
|
* Will almost always be 7, but we will accept 1 to 64.
|
|
*/
|
|
|
|
DBG_PRT((L"bootsect[1F1h] == %d setup sectors\n", bootsect[0x1F1]));
|
|
|
|
if (bootsect[0x1F1] < 1 || bootsect[0x1F1] > 64) {
|
|
ERR_PRT((L"%s is not a valid bzImage kernel image.",
|
|
kname));
|
|
fops_close(fd);
|
|
free_kmem();
|
|
return -1;
|
|
}
|
|
/*
|
|
* Allocate and read setup data.
|
|
*/
|
|
|
|
DBG_PRT((L"reading setup data...\n"));
|
|
|
|
param_size = (bootsect[0x1F1] + 1) * 512;
|
|
param_start = alloc(param_size, EfiLoaderData);
|
|
|
|
DBG_PRT((L"param_size=%d param_start=" PTR_FMT, param_size, param_start));
|
|
|
|
if (!param_start) {
|
|
ERR_PRT((L"Could not allocate %d bytes of setup data.",
|
|
param_size));
|
|
fops_close(fd);
|
|
free_kmem();
|
|
return -1;
|
|
}
|
|
|
|
CopyMem(param_start, bootsect, sizeof bootsect);
|
|
|
|
size = param_size - 512;
|
|
efi_status = fops_read(fd, ((UINT8 *)param_start) + 512, &size);
|
|
|
|
if (EFI_ERROR(efi_status) || size != param_size - 512) {
|
|
ERR_PRT((L"Could not read %d bytes of setup data.",
|
|
param_size - 512));
|
|
free(param_start);
|
|
param_start = NULL;
|
|
param_size = 0;
|
|
fops_close(fd);
|
|
free_kmem();
|
|
return -1;
|
|
}
|
|
/*
|
|
* Check for setup data signature.
|
|
*/
|
|
|
|
{
|
|
UINT8 *c = ((UINT8 *)param_start)+514;
|
|
DBG_PRT((L"param_start(c=" PTR_FMT "): %c-%c-%c-%c",
|
|
c, (CHAR16)c[0],(CHAR16) c[1], (CHAR16)c[2], (CHAR16)c[3]));
|
|
}
|
|
if (CompareMem(((UINT8 *)param_start) + 514, "HdrS", 4)) {
|
|
ERR_PRT((L"%s does not have a setup signature.",
|
|
kname));
|
|
free(param_start);
|
|
param_start = NULL;
|
|
param_size = 0;
|
|
fops_close(fd);
|
|
free_kmem();
|
|
return -1;
|
|
}
|
|
/*
|
|
* Allocate memory for kernel.
|
|
*/
|
|
|
|
/*
|
|
* Get correct address for kernel from header, if applicable & available.
|
|
*/
|
|
if ((param_start->s.hdr_major == 2) &&
|
|
(param_start->s.hdr_minor >= 6) &&
|
|
(param_start->s.kernel_start >= DEFAULT_KERNEL_START)) {
|
|
kernel_start = (void *)param_start->s.kernel_start;
|
|
VERB_PRT(3, Print(L"kernel header suggests kernel start at address "PTR_FMT"\n",
|
|
kernel_start));
|
|
}
|
|
|
|
kernel_load_address = NULL; /* allocate anywhere! */
|
|
|
|
if (alloc_kmem(kernel_start, EFI_SIZE_TO_PAGES(kernel_size)) != 0) {
|
|
/*
|
|
* Couldn't get desired address--just load it anywhere and move it later.
|
|
* (Easier than relocating kernel, and also works with non-relocatable kernels.)
|
|
*/
|
|
if (alloc_kmem_anywhere(&kernel_load_address, EFI_SIZE_TO_PAGES(kernel_size)) != 0) {
|
|
ERR_PRT((L"Could not allocate memory for kernel."));
|
|
free(param_start);
|
|
param_start = NULL;
|
|
param_size = 0;
|
|
fops_close(fd);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
VERB_PRT(3, Print(L"kernel_start: "PTR_FMT" kernel_size: %d loading at: "PTR_FMT"\n",
|
|
kernel_start, kernel_size, kernel_load_address));
|
|
|
|
|
|
/*
|
|
* Now read the rest of the kernel image into memory.
|
|
*/
|
|
|
|
DBG_PRT((L"reading kernel image...\n"));
|
|
|
|
size = kernel_size;
|
|
efi_status = fops_read(fd, kernel_load_address, &size);
|
|
if (EFI_ERROR(efi_status) || size < 0x10000) {
|
|
ERR_PRT((L"Error reading kernel image %s.", kname));
|
|
free(param_start);
|
|
param_start = NULL;
|
|
param_size = 0;
|
|
fops_close(fd);
|
|
free_kmem();
|
|
return -1;
|
|
}
|
|
|
|
DBG_PRT((L"kernel image read: %d bytes, %d Kbytes\n", size, size / 1024));
|
|
|
|
/*
|
|
* Boot sector, setup data and kernel image loaded.
|
|
*/
|
|
|
|
fops_close(fd);
|
|
return 0;
|
|
}
|
|
|
|
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
|
|
static INTN
|
|
bzImage_load(CHAR16 *kname, kdesc_t *kd)
|
|
{
|
|
DBG_PRT((L"load_bzImage_boot()\n"));
|
|
|
|
if (!kname || !kd) {
|
|
ERR_PRT((L"kname=" PTR_FMT " kd=" PTR_FMT, kname, kd));
|
|
free(param_start);
|
|
param_start = NULL;
|
|
param_size = 0;
|
|
free_kmem();
|
|
return -1;
|
|
}
|
|
kd->kstart = kd->kentry = kernel_start;
|
|
kd->kend = ((UINT8 *)kd->kstart) + kernel_size;
|
|
|
|
DBG_PRT((L"kstart=" PTR_FMT " kentry=" PTR_FMT " kend=" PTR_FMT "\n", kd->kstart, kd->kentry, kd->kend));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
|
|
loader_ops_t bzimage_loader = {
|
|
NULL,
|
|
L"bzImage_loader",
|
|
&bzImage_probe,
|
|
&bzImage_load
|
|
};
|