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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2013 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <grub/util/install.h>
#include <grub/emu/config.h>
#include <grub/emu/exec.h>
#include <grub/emu/misc.h>
#include <sys/types.h>
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/utsname.h>
static int
is_not_empty_directory (const char *dir)
{
DIR *d;
struct dirent *de;
d = opendir (dir);
if (!d)
return 0;
while ((de = readdir (d)))
{
if (strcmp (de->d_name, ".") == 0
|| strcmp (de->d_name, "..") == 0)
continue;
closedir (d);
return 1;
}
closedir (d);
return 0;
}
static int
is_64_kernel (void)
{
struct utsname un;
if (uname (&un) < 0)
return 0;
return strcmp (un.machine, "x86_64") == 0;
}
static int
read_platform_size (void)
{
FILE *fp;
char *buf = NULL;
size_t len = 0;
int ret = 0;
/* Newer kernels can tell us directly about the size of the
* underlying firmware - let's see if that interface is there. */
fp = grub_util_fopen ("/sys/firmware/efi/fw_platform_size", "r");
if (fp != NULL)
{
if (getline (&buf, &len, fp) >= 3) /* 2 digits plus newline */
{
if (strncmp (buf, "32", 2) == 0)
ret = 32;
else if (strncmp (buf, "64", 2) == 0)
ret = 64;
}
free (buf);
fclose (fp);
}
if (ret == 0)
{
/* Unrecognised - fall back to matching the kernel size
* instead */
if (is_64_kernel ())
ret = 64;
else
ret = 32;
}
return ret;
}
const char *
grub_install_get_default_arm_platform (void)
{
/*
* On Linux, we need the efivars kernel modules. If no EFI is available this
* module just does nothing besides a small hello and if we detect efi we'll
* load it anyway later. So it should be safe to try to load it here.
*/
grub_util_exec_redirect_all ((const char * []){ "modprobe", "efivars", NULL },
NULL, NULL, "/dev/null");
grub_util_info ("Looking for /sys/firmware/efi ..");
if (is_not_empty_directory ("/sys/firmware/efi"))
{
const char *pkglibdir = grub_util_get_pkglibdir ();
const char *platform;
char *pd;
int found;
grub_util_info ("...found");
platform = "arm-efi";
pd = grub_util_path_concat (2, pkglibdir, platform);
found = grub_util_is_directory (pd);
free (pd);
if (found)
return platform;
else
grub_util_info ("... but %s platform not available", platform);
}
grub_util_info ("... not found");
return "arm-uboot";
}
const char *
grub_install_get_default_x86_platform (void)
{
/*
On Linux, we need the efivars kernel modules.
If no EFI is available this module just does nothing
besides a small hello and if we detect efi we'll load it
anyway later. So it should be safe to
try to load it here.
*/
grub_util_exec_redirect_all ((const char * []){ "modprobe", "efivars", NULL },
NULL, NULL, "/dev/null");
grub_util_info ("Looking for /sys/firmware/efi ..");
if (is_not_empty_directory ("/sys/firmware/efi"))
{
const char *pkglibdir = grub_util_get_pkglibdir ();
const char *platform;
char *pd;
int found;
grub_util_info ("...found");
if (read_platform_size() == 64)
platform = "x86_64-efi";
else
platform = "i386-efi";
pd = grub_util_path_concat (2, pkglibdir, platform);
found = grub_util_is_directory (pd);
free (pd);
if (found)
return platform;
else
grub_util_info ("... but %s platform not available", platform);
}
grub_util_info ("... not found. Looking for /proc/device-tree ..");
if (is_not_empty_directory ("/proc/device-tree"))
{
grub_util_info ("...found");
return "i386-ieee1275";
}
grub_util_info ("... not found");
return "i386-pc";
}
const char *
grub_install_get_default_powerpc_machtype (void)
{
FILE *fp;
char *buf = NULL;
size_t len = 0;
const char *machtype = "generic";
fp = grub_util_fopen ("/proc/cpuinfo", "r");
if (! fp)
return machtype;
while (getline (&buf, &len, fp) > 0)
{
if (strncmp (buf, "pmac-generation",
sizeof ("pmac-generation") - 1) == 0)
{
if (strstr (buf, "NewWorld"))
{
machtype = "pmac_newworld";
break;
}
if (strstr (buf, "OldWorld"))
{
machtype = "pmac_oldworld";
break;
}
}
if (strncmp (buf, "motherboard", sizeof ("motherboard") - 1) == 0 &&
strstr (buf, "AAPL"))
{
machtype = "pmac_oldworld";
break;
}
if (strncmp (buf, "machine", sizeof ("machine") - 1) == 0 &&
strstr (buf, "CHRP IBM"))
{
if (strstr (buf, "qemu"))
{
machtype = "chrp_ibm_qemu";
break;
}
else
{
machtype = "chrp_ibm";
break;
}
}
if (strncmp (buf, "platform", sizeof ("platform") - 1) == 0)
{
if (strstr (buf, "Maple"))
{
machtype = "maple";
break;
}
if (strstr (buf, "Cell"))
{
machtype = "cell";
break;
}
}
}
free (buf);
fclose (fp);
return machtype;
}
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