529 lines
14 KiB
C
529 lines
14 KiB
C
/* linux.c - boot Linux */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2003,2004,2005,2007,2009,2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/elf.h>
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#include <grub/elfload.h>
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#include <grub/loader.h>
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#include <grub/dl.h>
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#include <grub/mm.h>
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#include <grub/misc.h>
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#include <grub/command.h>
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#include <grub/mips/relocator.h>
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#include <grub/memory.h>
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#include <grub/i18n.h>
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#include <grub/lib/cmdline.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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#pragma GCC diagnostic ignored "-Wcast-align"
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/* For frequencies. */
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#include <grub/machine/time.h>
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#ifdef GRUB_MACHINE_MIPS_LOONGSON
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#include <grub/pci.h>
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#include <grub/machine/kernel.h>
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const char loongson_machtypes[][60] =
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{
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[GRUB_ARCH_MACHINE_YEELOONG] = "machtype=lemote-yeeloong-2f-8.9inches",
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[GRUB_ARCH_MACHINE_FULOONG2F] = "machtype=lemote-fuloong-2f-box",
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[GRUB_ARCH_MACHINE_FULOONG2E] = "machtype=lemote-fuloong-2e-unknown"
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};
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#endif
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static grub_dl_t my_mod;
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static int loaded;
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static grub_size_t linux_size;
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static struct grub_relocator *relocator;
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static grub_uint8_t *playground;
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static grub_addr_t target_addr, entry_addr;
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#ifdef GRUB_MACHINE_MIPS_QEMU_MIPS
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static char *params;
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#else
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static int linux_argc;
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static grub_off_t argv_off;
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#ifdef GRUB_MACHINE_MIPS_LOONGSON
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static grub_off_t envp_off;
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#endif
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static grub_off_t rd_addr_arg_off, rd_size_arg_off;
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#endif
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static int initrd_loaded = 0;
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static grub_err_t
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grub_linux_boot (void)
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{
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struct grub_relocator32_state state;
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grub_memset (&state, 0, sizeof (state));
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/* Boot the kernel. */
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state.gpr[1] = entry_addr;
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#ifdef GRUB_MACHINE_MIPS_QEMU_MIPS
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{
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grub_err_t err;
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grub_relocator_chunk_t ch;
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grub_uint32_t *memsize;
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grub_uint32_t *magic;
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char *str;
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err = grub_relocator_alloc_chunk_addr (relocator, &ch,
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((16 << 20) - 264),
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grub_strlen (params) + 1 + 8);
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if (err)
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return err;
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memsize = get_virtual_current_address (ch);
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magic = memsize + 1;
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*memsize = grub_mmap_get_lower ();
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*magic = 0x12345678;
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str = (char *) (magic + 1);
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grub_strcpy (str, params);
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}
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#endif
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#ifndef GRUB_MACHINE_MIPS_QEMU_MIPS
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state.gpr[4] = linux_argc;
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state.gpr[5] = target_addr + argv_off;
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#ifdef GRUB_MACHINE_MIPS_LOONGSON
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state.gpr[6] = target_addr + envp_off;
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#else
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state.gpr[6] = 0;
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#endif
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state.gpr[7] = 0;
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#endif
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state.jumpreg = 1;
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grub_relocator32_boot (relocator, state);
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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grub_linux_unload (void)
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{
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grub_relocator_unload (relocator);
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grub_dl_unref (my_mod);
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#ifdef GRUB_MACHINE_MIPS_QEMU_MIPS
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grub_free (params);
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params = 0;
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#endif
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loaded = 0;
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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grub_linux_load32 (grub_elf_t elf, const char *filename,
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void **extra_mem, grub_size_t extra_size)
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{
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Elf32_Addr base;
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int extraoff;
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grub_err_t err;
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/* Linux's entry point incorrectly contains a virtual address. */
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entry_addr = elf->ehdr.ehdr32.e_entry;
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linux_size = grub_elf32_size (elf, &base, 0);
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if (linux_size == 0)
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return grub_errno;
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target_addr = base;
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/* Pad it; the kernel scribbles over memory beyond its load address. */
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linux_size += 0x100000;
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linux_size = ALIGN_UP (base + linux_size, 4) - base;
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extraoff = linux_size;
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linux_size += extra_size;
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relocator = grub_relocator_new ();
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if (!relocator)
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return grub_errno;
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{
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grub_relocator_chunk_t ch;
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err = grub_relocator_alloc_chunk_addr (relocator, &ch,
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target_addr & 0x1fffffff,
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linux_size);
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if (err)
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return err;
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playground = get_virtual_current_address (ch);
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}
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*extra_mem = playground + extraoff;
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/* Now load the segments into the area we claimed. */
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return grub_elf32_load (elf, filename, playground - base, GRUB_ELF_LOAD_FLAGS_NONE, 0, 0);
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}
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static grub_err_t
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grub_linux_load64 (grub_elf_t elf, const char *filename,
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void **extra_mem, grub_size_t extra_size)
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{
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Elf64_Addr base;
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int extraoff;
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grub_err_t err;
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/* Linux's entry point incorrectly contains a virtual address. */
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entry_addr = elf->ehdr.ehdr64.e_entry;
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linux_size = grub_elf64_size (elf, &base, 0);
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if (linux_size == 0)
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return grub_errno;
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target_addr = base;
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/* Pad it; the kernel scribbles over memory beyond its load address. */
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linux_size += 0x100000;
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linux_size = ALIGN_UP (base + linux_size, 4) - base;
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extraoff = linux_size;
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linux_size += extra_size;
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relocator = grub_relocator_new ();
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if (!relocator)
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return grub_errno;
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{
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grub_relocator_chunk_t ch;
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err = grub_relocator_alloc_chunk_addr (relocator, &ch,
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target_addr & 0x1fffffff,
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linux_size);
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if (err)
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return err;
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playground = get_virtual_current_address (ch);
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}
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*extra_mem = playground + extraoff;
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/* Now load the segments into the area we claimed. */
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return grub_elf64_load (elf, filename, playground - base, GRUB_ELF_LOAD_FLAGS_NONE, 0, 0);
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}
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static grub_err_t
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grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
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int argc, char *argv[])
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{
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grub_elf_t elf = 0;
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int size;
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void *extra = NULL;
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#ifndef GRUB_MACHINE_MIPS_QEMU_MIPS
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int i;
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grub_uint32_t *linux_argv;
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char *linux_args;
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#endif
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grub_err_t err;
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#ifdef GRUB_MACHINE_MIPS_LOONGSON
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char *linux_envs;
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grub_uint32_t *linux_envp;
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#endif
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if (argc == 0)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
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elf = grub_elf_open (argv[0]);
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if (! elf)
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return grub_errno;
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if (elf->ehdr.ehdr32.e_type != ET_EXEC)
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{
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grub_elf_close (elf);
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return grub_error (GRUB_ERR_UNKNOWN_OS,
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N_("this ELF file is not of the right type"));
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}
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/* Release the previously used memory. */
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grub_loader_unset ();
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loaded = 0;
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#ifdef GRUB_MACHINE_MIPS_QEMU_MIPS
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size = 0;
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#else
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/* For arguments. */
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linux_argc = argc;
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#ifdef GRUB_MACHINE_MIPS_LOONGSON
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linux_argc++;
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#endif
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/* Main arguments. */
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size = (linux_argc) * sizeof (grub_uint32_t);
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/* Initrd address and size. */
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size += 2 * sizeof (grub_uint32_t);
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/* NULL terminator. */
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size += sizeof (grub_uint32_t);
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/* First argument is always "a0". */
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size += ALIGN_UP (sizeof ("a0"), 4);
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/* Normal arguments. */
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for (i = 1; i < argc; i++)
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size += ALIGN_UP (grub_strlen (argv[i]) + 1, 4);
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#ifdef GRUB_MACHINE_MIPS_LOONGSON
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size += ALIGN_UP (sizeof (loongson_machtypes[0]), 4);
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#endif
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/* rd arguments. */
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size += ALIGN_UP (sizeof ("rd_start=0xXXXXXXXXXXXXXXXX"), 4);
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size += ALIGN_UP (sizeof ("rd_size=0xXXXXXXXXXXXXXXXX"), 4);
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/* For the environment. */
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size += sizeof (grub_uint32_t);
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size += 4 * sizeof (grub_uint32_t);
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size += ALIGN_UP (sizeof ("memsize=XXXXXXXXXXXXXXXXXXXX"), 4)
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+ ALIGN_UP (sizeof ("highmemsize=XXXXXXXXXXXXXXXXXXXX"), 4)
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+ ALIGN_UP (sizeof ("busclock=XXXXXXXXXX"), 4)
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+ ALIGN_UP (sizeof ("cpuclock=XXXXXXXXXX"), 4);
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#endif
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if (grub_elf_is_elf32 (elf))
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err = grub_linux_load32 (elf, argv[0], &extra, size);
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else
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if (grub_elf_is_elf64 (elf))
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err = grub_linux_load64 (elf, argv[0], &extra, size);
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else
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err = grub_error (GRUB_ERR_BAD_OS, N_("invalid arch-dependent ELF magic"));
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grub_elf_close (elf);
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if (err)
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return err;
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#ifdef GRUB_MACHINE_MIPS_QEMU_MIPS
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/* Create kernel command line. */
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size = grub_loader_cmdline_size(argc, argv);
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params = grub_malloc (size + sizeof (LINUX_IMAGE));
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if (! params)
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{
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grub_linux_unload ();
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return grub_errno;
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}
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grub_memcpy (params, LINUX_IMAGE, sizeof (LINUX_IMAGE));
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grub_create_loader_cmdline (argc, argv, params + sizeof (LINUX_IMAGE) - 1,
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size);
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#else
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linux_argv = extra;
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argv_off = (grub_uint8_t *) linux_argv - (grub_uint8_t *) playground;
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extra = linux_argv + (linux_argc + 1 + 2);
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linux_args = extra;
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grub_memcpy (linux_args, "a0", sizeof ("a0"));
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*linux_argv = (grub_uint8_t *) linux_args - (grub_uint8_t *) playground
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+ target_addr;
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linux_argv++;
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linux_args += ALIGN_UP (sizeof ("a0"), 4);
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#ifdef GRUB_MACHINE_MIPS_LOONGSON
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{
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unsigned mtype = grub_arch_machine;
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if (mtype >= ARRAY_SIZE (loongson_machtypes))
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mtype = 0;
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/* In Loongson platform, it is the responsibility of the bootloader/firmware
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to supply the OS kernel with machine type information. */
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grub_memcpy (linux_args, loongson_machtypes[mtype],
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sizeof (loongson_machtypes[mtype]));
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*linux_argv = (grub_uint8_t *) linux_args - (grub_uint8_t *) playground
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+ target_addr;
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linux_argv++;
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linux_args += ALIGN_UP (sizeof (loongson_machtypes[mtype]), 4);
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}
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#endif
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for (i = 1; i < argc; i++)
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{
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grub_memcpy (linux_args, argv[i], grub_strlen (argv[i]) + 1);
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*linux_argv = (grub_uint8_t *) linux_args - (grub_uint8_t *) playground
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+ target_addr;
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linux_argv++;
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linux_args += ALIGN_UP (grub_strlen (argv[i]) + 1, 4);
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}
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/* Reserve space for rd arguments. */
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rd_addr_arg_off = (grub_uint8_t *) linux_args - (grub_uint8_t *) playground;
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linux_args += ALIGN_UP (sizeof ("rd_start=0xXXXXXXXXXXXXXXXX"), 4);
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*linux_argv = 0;
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linux_argv++;
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rd_size_arg_off = (grub_uint8_t *) linux_args - (grub_uint8_t *) playground;
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linux_args += ALIGN_UP (sizeof ("rd_size=0xXXXXXXXXXXXXXXXX"), 4);
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*linux_argv = 0;
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linux_argv++;
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*linux_argv = 0;
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extra = linux_args;
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#ifdef GRUB_MACHINE_MIPS_LOONGSON
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linux_envp = extra;
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envp_off = (grub_uint8_t *) linux_envp - (grub_uint8_t *) playground;
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linux_envs = (char *) (linux_envp + 5);
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grub_snprintf (linux_envs, sizeof ("memsize=XXXXXXXXXXXXXXXXXXXX"),
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"memsize=%lld",
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(unsigned long long) grub_mmap_get_lower () >> 20);
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linux_envp[0] = (grub_uint8_t *) linux_envs - (grub_uint8_t *) playground
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+ target_addr;
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linux_envs += ALIGN_UP (grub_strlen (linux_envs) + 1, 4);
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grub_snprintf (linux_envs, sizeof ("highmemsize=XXXXXXXXXXXXXXXXXXXX"),
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"highmemsize=%lld",
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(unsigned long long) grub_mmap_get_upper () >> 20);
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linux_envp[1] = (grub_uint8_t *) linux_envs - (grub_uint8_t *) playground
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+ target_addr;
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linux_envs += ALIGN_UP (grub_strlen (linux_envs) + 1, 4);
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grub_snprintf (linux_envs, sizeof ("busclock=XXXXXXXXXX"),
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"busclock=%d", grub_arch_busclock);
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linux_envp[2] = (grub_uint8_t *) linux_envs - (grub_uint8_t *) playground
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+ target_addr;
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linux_envs += ALIGN_UP (grub_strlen (linux_envs) + 1, 4);
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grub_snprintf (linux_envs, sizeof ("cpuclock=XXXXXXXXXX"),
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"cpuclock=%d", grub_arch_cpuclock);
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linux_envp[3] = (grub_uint8_t *) linux_envs - (grub_uint8_t *) playground
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+ target_addr;
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linux_envs += ALIGN_UP (grub_strlen (linux_envs) + 1, 4);
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linux_envp[4] = 0;
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#endif
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#endif
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grub_loader_set (grub_linux_boot, grub_linux_unload, 1);
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initrd_loaded = 0;
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loaded = 1;
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grub_dl_ref (my_mod);
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
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int argc, char *argv[])
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{
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grub_file_t *files = 0;
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grub_size_t size = 0;
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void *initrd_src;
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grub_addr_t initrd_dest;
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grub_err_t err;
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int i;
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int nfiles = 0;
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grub_uint8_t *ptr;
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if (argc == 0)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
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if (!loaded)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("you need to load the kernel first"));
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if (initrd_loaded)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "only one initrd command can be issued.");
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files = grub_zalloc (argc * sizeof (files[0]));
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if (!files)
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goto fail;
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for (i = 0; i < argc; i++)
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{
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grub_file_filter_disable_compression ();
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files[i] = grub_file_open (argv[i]);
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if (! files[i])
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goto fail;
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nfiles++;
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size += ALIGN_UP (grub_file_size (files[i]), 4);
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}
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{
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grub_relocator_chunk_t ch;
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err = grub_relocator_alloc_chunk_align (relocator, &ch,
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(target_addr & 0x1fffffff)
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+ linux_size + 0x10000,
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(0x10000000 - size),
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size, 0x10000,
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GRUB_RELOCATOR_PREFERENCE_NONE, 0);
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if (err)
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goto fail;
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initrd_src = get_virtual_current_address (ch);
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initrd_dest = get_physical_target_address (ch) | 0x80000000;
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}
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ptr = initrd_src;
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for (i = 0; i < nfiles; i++)
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{
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grub_ssize_t cursize = grub_file_size (files[i]);
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if (grub_file_read (files[i], ptr, cursize) != cursize)
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{
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if (!grub_errno)
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grub_error (GRUB_ERR_FILE_READ_ERROR, N_("premature end of file %s"),
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argv[i]);
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goto fail;
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}
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ptr += cursize;
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grub_memset (ptr, 0, ALIGN_UP_OVERHEAD (cursize, 4));
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ptr += ALIGN_UP_OVERHEAD (cursize, 4);
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}
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#ifdef GRUB_MACHINE_MIPS_QEMU_MIPS
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{
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char *tmp;
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tmp = grub_xasprintf ("%s rd_start=0x%" PRIxGRUB_ADDR
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" rd_size=0x%" PRIxGRUB_ADDR, params,
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initrd_dest, size);
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if (!tmp)
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||
goto fail;
|
||
grub_free (params);
|
||
params = tmp;
|
||
}
|
||
#else
|
||
grub_snprintf ((char *) playground + rd_addr_arg_off,
|
||
sizeof ("rd_start=0xXXXXXXXXXXXXXXXX"), "rd_start=0x%llx",
|
||
(unsigned long long) initrd_dest);
|
||
((grub_uint32_t *) (playground + argv_off))[linux_argc]
|
||
= target_addr + rd_addr_arg_off;
|
||
linux_argc++;
|
||
|
||
grub_snprintf ((char *) playground + rd_size_arg_off,
|
||
sizeof ("rd_size=0xXXXXXXXXXXXXXXXXX"), "rd_size=0x%llx",
|
||
(unsigned long long) size);
|
||
((grub_uint32_t *) (playground + argv_off))[linux_argc]
|
||
= target_addr + rd_size_arg_off;
|
||
linux_argc++;
|
||
#endif
|
||
|
||
initrd_loaded = 1;
|
||
|
||
fail:
|
||
for (i = 0; i < nfiles; i++)
|
||
grub_file_close (files[i]);
|
||
grub_free (files);
|
||
|
||
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);
|
||
}
|