292 lines
7.1 KiB
C
292 lines
7.1 KiB
C
/* init.c -- Initialize GRUB on the newworld mac (PPC). */
|
|
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2003,2004,2005,2007,2008 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 <grub/kernel.h>
|
|
#include <grub/dl.h>
|
|
#include <grub/disk.h>
|
|
#include <grub/mm.h>
|
|
#include <grub/partition.h>
|
|
#include <grub/normal.h>
|
|
#include <grub/fs.h>
|
|
#include <grub/setjmp.h>
|
|
#include <grub/env.h>
|
|
#include <grub/misc.h>
|
|
#include <grub/time.h>
|
|
#include <grub/machine/console.h>
|
|
#include <grub/machine/kernel.h>
|
|
#include <grub/cpu/kernel.h>
|
|
#include <grub/ieee1275/ofdisk.h>
|
|
#include <grub/ieee1275/ieee1275.h>
|
|
|
|
/* The minimal heap size we can live with. */
|
|
#define HEAP_MIN_SIZE (unsigned long) (2 * 1024 * 1024)
|
|
|
|
/* The maximum heap size we're going to claim */
|
|
#define HEAP_MAX_SIZE (unsigned long) (4 * 1024 * 1024)
|
|
|
|
/* If possible, we will avoid claiming heap above this address, because it
|
|
seems to cause relocation problems with OSes that link at 4 MiB */
|
|
#define HEAP_MAX_ADDR (unsigned long) (4 * 1024 * 1024)
|
|
|
|
extern char _start[];
|
|
extern char _end[];
|
|
|
|
void
|
|
grub_exit (void)
|
|
{
|
|
grub_ieee1275_exit ();
|
|
}
|
|
|
|
/* Translate an OF filesystem path (separated by backslashes), into a GRUB
|
|
path (separated by forward slashes). */
|
|
static void
|
|
grub_translate_ieee1275_path (char *filepath)
|
|
{
|
|
char *backslash;
|
|
|
|
backslash = grub_strchr (filepath, '\\');
|
|
while (backslash != 0)
|
|
{
|
|
*backslash = '/';
|
|
backslash = grub_strchr (filepath, '\\');
|
|
}
|
|
}
|
|
|
|
void
|
|
grub_machine_set_prefix (void)
|
|
{
|
|
char bootpath[64]; /* XXX check length */
|
|
char *filename;
|
|
char *prefix;
|
|
|
|
if (grub_env_get ("prefix"))
|
|
/* We already set prefix in grub_machine_init(). */
|
|
return;
|
|
|
|
if (grub_prefix[0])
|
|
{
|
|
grub_env_set ("prefix", grub_prefix);
|
|
/* Prefix is hardcoded in the core image. */
|
|
return;
|
|
}
|
|
|
|
if (grub_ieee1275_get_property (grub_ieee1275_chosen, "bootpath", &bootpath,
|
|
sizeof (bootpath), 0))
|
|
{
|
|
/* Should never happen. */
|
|
grub_printf ("/chosen/bootpath property missing!\n");
|
|
grub_env_set ("prefix", "");
|
|
return;
|
|
}
|
|
|
|
/* Transform an OF device path to a GRUB path. */
|
|
|
|
prefix = grub_ieee1275_encode_devname (bootpath);
|
|
|
|
filename = grub_ieee1275_get_filename (bootpath);
|
|
if (filename)
|
|
{
|
|
char *newprefix;
|
|
char *lastslash = grub_strrchr (filename, '\\');
|
|
|
|
/* Truncate at last directory. */
|
|
if (lastslash)
|
|
{
|
|
*lastslash = '\0';
|
|
grub_translate_ieee1275_path (filename);
|
|
|
|
newprefix = grub_asprintf ("%s%s", prefix, filename);
|
|
if (newprefix)
|
|
{
|
|
grub_free (prefix);
|
|
prefix = newprefix;
|
|
}
|
|
}
|
|
}
|
|
|
|
grub_env_set ("prefix", prefix);
|
|
|
|
grub_free (filename);
|
|
grub_free (prefix);
|
|
}
|
|
|
|
/* Claim some available memory in the first /memory node. */
|
|
static void grub_claim_heap (void)
|
|
{
|
|
unsigned long total = 0;
|
|
|
|
auto int NESTED_FUNC_ATTR heap_init (grub_uint64_t addr, grub_uint64_t len, grub_uint32_t type);
|
|
int NESTED_FUNC_ATTR heap_init (grub_uint64_t addr, grub_uint64_t len, grub_uint32_t type)
|
|
{
|
|
if (type != 1)
|
|
return 0;
|
|
|
|
len -= 1; /* Required for some firmware. */
|
|
|
|
/* Never exceed HEAP_MAX_SIZE */
|
|
if (total + len > HEAP_MAX_SIZE)
|
|
len = HEAP_MAX_SIZE - total;
|
|
|
|
/* Avoid claiming anything above HEAP_MAX_ADDR, if possible. */
|
|
if ((addr < HEAP_MAX_ADDR) && /* if it's too late, don't bother */
|
|
(addr + len > HEAP_MAX_ADDR) && /* if it wasn't available anyway, don't bother */
|
|
(total + (HEAP_MAX_ADDR - addr) > HEAP_MIN_SIZE)) /* only limit ourselves when we can afford to */
|
|
len = HEAP_MAX_ADDR - addr;
|
|
|
|
/* In theory, firmware should already prevent this from happening by not
|
|
listing our own image in /memory/available. The check below is intended
|
|
as a safeguard in case that doesn't happen. However, it doesn't protect
|
|
us from corrupting our module area, which extends up to a
|
|
yet-undetermined region above _end. */
|
|
if ((addr < (grub_addr_t) _end) && ((addr + len) > (grub_addr_t) _start))
|
|
{
|
|
grub_printf ("Warning: attempt to claim over our own code!\n");
|
|
len = 0;
|
|
}
|
|
|
|
if (len)
|
|
{
|
|
/* Claim and use it. */
|
|
if (grub_claimmap (addr, len) < 0)
|
|
return grub_error (GRUB_ERR_OUT_OF_MEMORY,
|
|
"failed to claim heap at 0x%llx, len 0x%llx",
|
|
addr, len);
|
|
grub_mm_init_region ((void *) (grub_addr_t) addr, len);
|
|
}
|
|
|
|
total += len;
|
|
if (total >= HEAP_MAX_SIZE)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_CANNOT_INTERPRET))
|
|
heap_init (HEAP_MAX_ADDR - HEAP_MIN_SIZE, HEAP_MIN_SIZE, 1);
|
|
else
|
|
grub_machine_mmap_iterate (heap_init);
|
|
}
|
|
|
|
#ifdef __i386__
|
|
|
|
grub_uint32_t grub_upper_mem;
|
|
|
|
/* We need to call this before grub_claim_memory. */
|
|
static void
|
|
grub_get_extended_memory (void)
|
|
{
|
|
auto int NESTED_FUNC_ATTR find_ext_mem (grub_uint64_t addr, grub_uint64_t len, grub_uint32_t type);
|
|
int NESTED_FUNC_ATTR find_ext_mem (grub_uint64_t addr, grub_uint64_t len, grub_uint32_t type)
|
|
{
|
|
if (type == 1 && addr == 0x100000)
|
|
{
|
|
grub_upper_mem = len;
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
grub_machine_mmap_iterate (find_ext_mem);
|
|
}
|
|
|
|
#endif
|
|
|
|
static grub_uint64_t ieee1275_get_time_ms (void);
|
|
|
|
void
|
|
grub_machine_init (void)
|
|
{
|
|
char args[256];
|
|
grub_ssize_t actual;
|
|
|
|
grub_ieee1275_init ();
|
|
|
|
grub_console_init ();
|
|
#ifdef __i386__
|
|
grub_get_extended_memory ();
|
|
#endif
|
|
grub_claim_heap ();
|
|
grub_ofdisk_init ();
|
|
|
|
/* Process commandline. */
|
|
if (grub_ieee1275_get_property (grub_ieee1275_chosen, "bootargs", &args,
|
|
sizeof args, &actual) == 0
|
|
&& actual > 1)
|
|
{
|
|
int i = 0;
|
|
|
|
while (i < actual)
|
|
{
|
|
char *command = &args[i];
|
|
char *end;
|
|
char *val;
|
|
|
|
end = grub_strchr (command, ';');
|
|
if (end == 0)
|
|
i = actual; /* No more commands after this one. */
|
|
else
|
|
{
|
|
*end = '\0';
|
|
i += end - command + 1;
|
|
while (grub_isspace(args[i]))
|
|
i++;
|
|
}
|
|
|
|
/* Process command. */
|
|
val = grub_strchr (command, '=');
|
|
if (val)
|
|
{
|
|
*val = '\0';
|
|
grub_env_set (command, val + 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
grub_install_get_time_ms (ieee1275_get_time_ms);
|
|
}
|
|
|
|
void
|
|
grub_machine_fini (void)
|
|
{
|
|
grub_ofdisk_fini ();
|
|
grub_console_fini ();
|
|
}
|
|
|
|
static grub_uint64_t
|
|
ieee1275_get_time_ms (void)
|
|
{
|
|
grub_uint32_t msecs = 0;
|
|
|
|
grub_ieee1275_milliseconds (&msecs);
|
|
|
|
return msecs;
|
|
}
|
|
|
|
grub_uint32_t
|
|
grub_get_rtc (void)
|
|
{
|
|
return ieee1275_get_time_ms ();
|
|
}
|
|
|
|
grub_addr_t
|
|
grub_arch_modules_addr (void)
|
|
{
|
|
return ALIGN_UP((grub_addr_t) _end + GRUB_MOD_GAP, GRUB_MOD_ALIGN);
|
|
}
|