| /* 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_malloc (grub_strlen (prefix) |
| + grub_strlen (filename)); |
| grub_sprintf (newprefix, "%s%s", prefix, filename); |
| 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\n", |
| 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); |
| } |