/* init.c -- Initialize GRUB on the newworld mac (PPC). */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2003,2004,2005,2007,2008,2009 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 .
*/
#include
#include
#include
#include
#include
#include
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#include
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#include
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#include
#include
/* 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) (32 * 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) (32 * 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_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_xasprintf ("%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_memory_type_t type);
int NESTED_FUNC_ATTR heap_init (grub_uint64_t addr, grub_uint64_t len,
grub_memory_type_t type)
{
if (type != 1)
return 0;
if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_NO_PRE1_5M_CLAIM))
{
if (addr + len <= 0x180000)
return 0;
if (addr < 0x180000)
{
len = addr + len - 0x180000;
addr = 0x180000;
}
}
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);
}
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_early ();
grub_claim_heap ();
grub_console_init_lately ();
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_KERNEL_MACHINE_MOD_GAP, GRUB_KERNEL_MACHINE_MOD_ALIGN);
}