+++ /dev/null
-/* linux.c - boot Linux zImage or bzImage */
-/*
- * GRUB -- GRand Unified Bootloader
- * Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2007,2008,2009,2010 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/loader.h>
-#include <grub/machine/loader.h>
-#include <grub/machine/memory.h>
-#include <grub/file.h>
-#include <grub/err.h>
-#include <grub/disk.h>
-#include <grub/misc.h>
-#include <grub/types.h>
-#include <grub/mm.h>
-#include <grub/dl.h>
-#include <grub/env.h>
-#include <grub/term.h>
-#include <grub/cpu/linux.h>
-#include <grub/ieee1275/ieee1275.h>
-#include <grub/command.h>
-#include <grub/i18n.h>
-
-#define GRUB_OFW_LINUX_PARAMS_ADDR 0x90000
-#define GRUB_OFW_LINUX_KERNEL_ADDR 0x100000
-#define GRUB_OFW_LINUX_INITRD_ADDR 0x800000
-
-#define GRUB_OFW_LINUX_CL_OFFSET 0x1e00
-#define GRUB_OFW_LINUX_CL_LENGTH 0x100
-
-static grub_dl_t my_mod;
-
-static grub_size_t kernel_size;
-static char *kernel_addr, *kernel_cmdline;
-static grub_size_t initrd_size;
-
-static grub_err_t
-grub_linux_unload (void)
-{
- grub_free (kernel_cmdline);
- grub_free (kernel_addr);
- kernel_cmdline = 0;
- kernel_addr = 0;
- initrd_size = 0;
-
- grub_dl_unref (my_mod);
-
- return GRUB_ERR_NONE;
-}
-
-/*
-static int
-grub_ieee1275_debug (void)
-{
- struct enter_args
- {
- struct grub_ieee1275_common_hdr common;
- }
- args;
-
- INIT_IEEE1275_COMMON (&args.common, "enter", 0, 0);
-
- if (IEEE1275_CALL_ENTRY_FN (&args) == -1)
- return -1;
-
- return 0;
-}
-*/
-
-static grub_err_t
-grub_linux_boot (void)
-{
- struct linux_kernel_params *params;
- struct linux_kernel_header *lh;
- char *prot_code;
- char *bootpath;
- grub_ssize_t len;
-
- bootpath = grub_env_get ("root");
- if (bootpath)
- grub_ieee1275_set_property (grub_ieee1275_chosen,
- "bootpath", bootpath,
- grub_strlen (bootpath) + 1,
- &len);
-
- params = (struct linux_kernel_params *) GRUB_OFW_LINUX_PARAMS_ADDR;
- lh = (struct linux_kernel_header *) params;
-
- grub_memset ((char *) params, 0, GRUB_OFW_LINUX_CL_OFFSET);
-
- params->alt_mem = grub_mmap_get_upper () >> 10;
- params->ext_mem = params->alt_mem;
-
- lh->cmd_line_ptr = (char *)
- (GRUB_OFW_LINUX_PARAMS_ADDR + GRUB_OFW_LINUX_CL_OFFSET);
-
- params->cl_magic = GRUB_LINUX_CL_MAGIC;
- params->cl_offset = GRUB_OFW_LINUX_CL_OFFSET;
-
- {
- grub_term_output_t term;
- int found = 0;
- FOR_ACTIVE_TERM_OUTPUTS(term)
- if (grub_strcmp (term->name, "ofconsole") == 0)
- {
- grub_uint16_t pos = grub_term_getxy (term);
- params->video_cursor_x = pos >> 8;
- params->video_cursor_y = pos & 0xff;
- params->video_width = grub_term_width (term);
- params->video_height = grub_term_height (term);
- found = 1;
- break;
- }
- if (!found)
- {
- params->video_cursor_x = 0;
- params->video_cursor_y = 0;
- params->video_width = 80;
- params->video_height = 25;
- }
- }
-
- params->font_size = 16;
-
- params->ofw_signature = GRUB_LINUX_OFW_SIGNATURE;
- params->ofw_num_items = 1;
- params->ofw_cif_handler = (grub_uint32_t) grub_ieee1275_entry_fn;
- params->ofw_idt = 0;
-
- if (initrd_size)
- {
- lh->type_of_loader = 1;
- lh->ramdisk_image = GRUB_OFW_LINUX_INITRD_ADDR;
- lh->ramdisk_size = initrd_size;
- }
-
- if (kernel_cmdline)
- grub_strcpy (lh->cmd_line_ptr, kernel_cmdline);
-
- prot_code = (char *) GRUB_OFW_LINUX_KERNEL_ADDR;
- grub_memcpy (prot_code, kernel_addr, kernel_size);
-
- asm volatile ("movl %0, %%esi" : : "m" (params));
- asm volatile ("movl %%esi, %%esp" : : );
- asm volatile ("movl %0, %%ecx" : : "m" (prot_code));
- asm volatile ("xorl %%ebx, %%ebx" : : );
- asm volatile ("jmp *%%ecx" : : );
-
- return GRUB_ERR_NONE;
-}
-
-static grub_err_t
-grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
- int argc, char *argv[])
-{
- grub_file_t file = 0;
- struct linux_kernel_header lh;
- grub_uint8_t setup_sects;
- grub_size_t real_size, prot_size;
- int i;
- char *dest;
-
- grub_dl_ref (my_mod);
-
- if (argc == 0)
- {
- grub_error (GRUB_ERR_BAD_ARGUMENT, "no kernel specified");
- goto fail;
- }
-
- file = grub_file_open (argv[0]);
- if (! file)
- goto fail;
-
- if (grub_file_read (file, &lh, sizeof (lh)) != sizeof (lh))
- {
- grub_error (GRUB_ERR_READ_ERROR, "cannot read the Linux header");
- goto fail;
- }
-
- if ((lh.boot_flag != grub_cpu_to_le16 (0xaa55)) ||
- (lh.header != grub_cpu_to_le32 (GRUB_LINUX_MAGIC_SIGNATURE)))
- {
- grub_error (GRUB_ERR_BAD_OS, "invalid magic number");
- goto fail;
- }
-
- setup_sects = lh.setup_sects;
- if (! setup_sects)
- setup_sects = GRUB_LINUX_DEFAULT_SETUP_SECTS;
-
- real_size = setup_sects << GRUB_DISK_SECTOR_BITS;
- prot_size = grub_file_size (file) - real_size - GRUB_DISK_SECTOR_SIZE;
-
- grub_printf (" [Linux-%s, setup=0x%x, size=0x%x]\n",
- "bzImage", real_size, prot_size);
-
- grub_file_seek (file, real_size + GRUB_DISK_SECTOR_SIZE);
- if (grub_errno)
- goto fail;
-
- kernel_cmdline = grub_malloc (GRUB_OFW_LINUX_CL_LENGTH);
- if (! kernel_cmdline)
- goto fail;
-
- dest = kernel_cmdline;
- for (i = 1;
- i < argc
- && dest + grub_strlen (argv[i]) + 1 < (kernel_cmdline
- + GRUB_OFW_LINUX_CL_LENGTH);
- i++)
- {
- *dest++ = ' ';
- dest = grub_stpcpy (dest, argv[i]);
- }
-
- kernel_addr = grub_malloc (prot_size);
- if (! kernel_addr)
- goto fail;
-
- kernel_size = prot_size;
- if (grub_file_read (file, kernel_addr, prot_size) != (int) prot_size)
- grub_error (GRUB_ERR_FILE_READ_ERROR, "couldn't read file");
-
- if (grub_errno == GRUB_ERR_NONE)
- grub_loader_set (grub_linux_boot, grub_linux_unload, 1);
-
-fail:
-
- if (file)
- grub_file_close (file);
-
- if (grub_errno != GRUB_ERR_NONE)
- {
- grub_free (kernel_cmdline);
- grub_free (kernel_addr);
- kernel_cmdline = 0;
- kernel_addr = 0;
-
- grub_dl_unref (my_mod);
- }
-
- return grub_errno;
-}
-
-static grub_err_t
-grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
- int argc, char *argv[])
-{
- grub_file_t file = 0;
-
- if (argc == 0)
- {
- grub_error (GRUB_ERR_BAD_ARGUMENT, "no module specified");
- goto fail;
- }
-
- if (! kernel_addr)
- {
- grub_error (GRUB_ERR_BAD_ARGUMENT, "you need to load the kernel first");
- goto fail;
- }
-
- file = grub_file_open (argv[0]);
- if (! file)
- goto fail;
-
- initrd_size = grub_file_size (file);
- if (grub_file_read (file, (void *) GRUB_OFW_LINUX_INITRD_ADDR,
- initrd_size) != (int) initrd_size)
- {
- grub_error (GRUB_ERR_FILE_READ_ERROR, "couldn't read file");
- goto fail;
- }
-
-fail:
- if (file)
- grub_file_close (file);
-
- return grub_errno;
-}
-
-static grub_command_t cmd_linux, cmd_initrd;
-
-GRUB_MOD_INIT(linux)
-{
- cmd_linux = grub_register_command ("linux", grub_cmd_linux,
- 0, N_("Load Linux."));
- cmd_initrd = grub_register_command ("initrd", grub_cmd_initrd,
- 0, N_("Load initrd."));
- my_mod = mod;
-}
-
-GRUB_MOD_FINI(linux)
-{
- grub_unregister_command (cmd_linux);
- grub_unregister_command (cmd_initrd);
-}
projects / thirdparty / grub.git / commitdiff
