diff options
Diffstat (limited to 'grub-core/loader/ia64/efi/linux.c')
| -rw-r--r-- | grub-core/loader/ia64/efi/linux.c | 607 |
1 files changed, 607 insertions, 0 deletions
diff --git a/grub-core/loader/ia64/efi/linux.c b/grub-core/loader/ia64/efi/linux.c new file mode 100644 index 0000000..7987fd1 --- /dev/null +++ b/grub-core/loader/ia64/efi/linux.c @@ -0,0 +1,607 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2008,2010 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/file.h> +#include <grub/disk.h> +#include <grub/err.h> +#include <grub/misc.h> +#include <grub/types.h> +#include <grub/command.h> +#include <grub/dl.h> +#include <grub/mm.h> +#include <grub/cache.h> +#include <grub/kernel.h> +#include <grub/efi/api.h> +#include <grub/efi/efi.h> +#include <grub/elf.h> +#include <grub/i18n.h> +#include <grub/env.h> +#include <grub/linux.h> +#include <grub/verify.h> + +GRUB_MOD_LICENSE ("GPLv3+"); + +#pragma GCC diagnostic ignored "-Wcast-align" + +#define ALIGN_MIN (256*1024*1024) + +#define GRUB_ELF_SEARCH 1024 + +#define BOOT_PARAM_SIZE 16384 + +struct ia64_boot_param +{ + grub_uint64_t command_line; /* physical address of command line. */ + grub_uint64_t efi_systab; /* physical address of EFI system table */ + grub_uint64_t efi_memmap; /* physical address of EFI memory map */ + grub_uint64_t efi_memmap_size; /* size of EFI memory map */ + grub_uint64_t efi_memdesc_size; /* size of an EFI memory map descriptor */ + grub_uint32_t efi_memdesc_version; /* memory descriptor version */ + struct + { + grub_uint16_t num_cols; /* number of columns on console output dev */ + grub_uint16_t num_rows; /* number of rows on console output device */ + grub_uint16_t orig_x; /* cursor's x position */ + grub_uint16_t orig_y; /* cursor's y position */ + } console_info; + grub_uint64_t fpswa; /* physical address of the fpswa interface */ + grub_uint64_t initrd_start; + grub_uint64_t initrd_size; +}; + +typedef struct +{ + grub_uint32_t revision; + grub_uint32_t reserved; + void *fpswa; +} fpswa_interface_t; +static fpswa_interface_t *fpswa; + +#define NEXT_MEMORY_DESCRIPTOR(desc, size) \ + ((grub_efi_memory_descriptor_t *) ((char *) (desc) + (size))) + +static grub_dl_t my_mod; + +static int loaded; + +/* Kernel base and size. */ +static void *kernel_mem; +static grub_efi_uintn_t kernel_pages; +static grub_uint64_t entry; + +/* Initrd base and size. */ +static void *initrd_mem; +static grub_efi_uintn_t initrd_pages; +static grub_efi_uintn_t initrd_size; + +static struct ia64_boot_param *boot_param; +static grub_efi_uintn_t boot_param_pages; + +static inline grub_size_t +page_align (grub_size_t size) +{ + return (size + (1 << 12) - 1) & (~((1 << 12) - 1)); +} + +static void +query_fpswa (void) +{ + grub_efi_handle_t fpswa_image; + grub_efi_boot_services_t *bs; + grub_efi_status_t status; + grub_efi_uintn_t size; + static const grub_efi_guid_t fpswa_protocol = + { 0xc41b6531, 0x97b9, 0x11d3, + {0x9a, 0x29, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d} }; + + if (fpswa != NULL) + return; + + size = sizeof(grub_efi_handle_t); + + bs = grub_efi_system_table->boot_services; + status = bs->locate_handle (GRUB_EFI_BY_PROTOCOL, + (void *) &fpswa_protocol, + NULL, &size, &fpswa_image); + if (status != GRUB_EFI_SUCCESS) + { + grub_printf ("%s\n", _("Could not locate FPSWA driver")); + return; + } + status = bs->handle_protocol (fpswa_image, + (void *) &fpswa_protocol, (void *) &fpswa); + if (status != GRUB_EFI_SUCCESS) + { + grub_printf ("%s\n", + _("FPSWA protocol wasn't able to find the interface")); + return; + } +} + +static void +free_pages (void) +{ + if (kernel_mem) + { + grub_efi_free_pages ((grub_addr_t) kernel_mem, kernel_pages); + kernel_mem = 0; + } + + if (initrd_mem) + { + grub_efi_free_pages ((grub_addr_t) initrd_mem, initrd_pages); + initrd_mem = 0; + } + + if (boot_param) + { + /* Free bootparam. */ + grub_efi_free_pages ((grub_efi_physical_address_t) boot_param, + boot_param_pages); + boot_param = 0; + } +} + +static void * +allocate_pages (grub_uint64_t align, grub_uint64_t size_pages, + grub_uint64_t nobase) +{ + grub_uint64_t size; + grub_efi_uintn_t desc_size; + grub_efi_memory_descriptor_t *mmap, *mmap_end; + grub_efi_uintn_t mmap_size, tmp_mmap_size; + grub_efi_memory_descriptor_t *desc; + void *mem = NULL; + + size = size_pages << 12; + + mmap_size = grub_efi_find_mmap_size (); + if (!mmap_size) + return 0; + + /* Read the memory map temporarily, to find free space. */ + mmap = grub_malloc (mmap_size); + if (! mmap) + return 0; + + tmp_mmap_size = mmap_size; + if (grub_efi_get_memory_map (&tmp_mmap_size, mmap, 0, &desc_size, 0) <= 0) + { + grub_error (GRUB_ERR_IO, "cannot get memory map"); + goto fail; + } + + mmap_end = NEXT_MEMORY_DESCRIPTOR (mmap, tmp_mmap_size); + + /* First, find free pages for the real mode code + and the memory map buffer. */ + for (desc = mmap; + desc < mmap_end; + desc = NEXT_MEMORY_DESCRIPTOR (desc, desc_size)) + { + grub_uint64_t start, end; + grub_uint64_t aligned_start; + + if (desc->type != GRUB_EFI_CONVENTIONAL_MEMORY) + continue; + + start = desc->physical_start; + end = start + (desc->num_pages << 12); + /* Align is a power of 2. */ + aligned_start = (start + align - 1) & ~(align - 1); + if (aligned_start + size > end) + continue; + if (aligned_start == nobase) + aligned_start += align; + if (aligned_start + size > end) + continue; + mem = grub_efi_allocate_fixed (aligned_start, size_pages); + if (! mem) + { + grub_error (GRUB_ERR_OUT_OF_MEMORY, "cannot allocate memory"); + goto fail; + } + break; + } + + if (! mem) + { + grub_error (GRUB_ERR_OUT_OF_MEMORY, "cannot allocate memory"); + goto fail; + } + + grub_free (mmap); + return mem; + + fail: + grub_free (mmap); + free_pages (); + return 0; +} + +static void +set_boot_param_console (void) +{ + grub_efi_simple_text_output_interface_t *conout; + grub_efi_uintn_t cols, rows; + + conout = grub_efi_system_table->con_out; + if (conout->query_mode (conout, conout->mode->mode, &cols, &rows) + != GRUB_EFI_SUCCESS) + return; + + grub_dprintf ("linux", + "Console info: cols=%lu rows=%lu x=%u y=%u\n", + cols, rows, + conout->mode->cursor_column, conout->mode->cursor_row); + + boot_param->console_info.num_cols = cols; + boot_param->console_info.num_rows = rows; + boot_param->console_info.orig_x = conout->mode->cursor_column; + boot_param->console_info.orig_y = conout->mode->cursor_row; +} + +static grub_err_t +grub_linux_boot (void) +{ + grub_efi_uintn_t mmap_size; + grub_efi_uintn_t map_key; + grub_efi_uintn_t desc_size; + grub_efi_uint32_t desc_version; + grub_efi_memory_descriptor_t *mmap_buf; + grub_err_t err; + + /* FPSWA. */ + query_fpswa (); + boot_param->fpswa = (grub_uint64_t)fpswa; + + /* Initrd. */ + boot_param->initrd_start = (grub_uint64_t)initrd_mem; + boot_param->initrd_size = (grub_uint64_t)initrd_size; + + set_boot_param_console (); + + grub_dprintf ("linux", "Jump to %016lx\n", entry); + + /* MDT. + Must be done after grub_machine_fini because map_key is used by + exit_boot_services. */ + mmap_size = grub_efi_find_mmap_size (); + if (! mmap_size) + return grub_errno; + mmap_buf = grub_efi_allocate_any_pages (page_align (mmap_size) >> 12); + if (! mmap_buf) + return grub_error (GRUB_ERR_IO, "cannot allocate memory map"); + err = grub_efi_finish_boot_services (&mmap_size, mmap_buf, &map_key, + &desc_size, &desc_version); + if (err) + return err; + + boot_param->efi_memmap = (grub_uint64_t)mmap_buf; + boot_param->efi_memmap_size = mmap_size; + boot_param->efi_memdesc_size = desc_size; + boot_param->efi_memdesc_version = desc_version; + + /* See you next boot. */ + asm volatile ("mov r28=%1; br.sptk.few %0" :: "b"(entry),"r"(boot_param)); + + /* Never reach here. */ + return GRUB_ERR_NONE; +} + +static grub_err_t +grub_linux_unload (void) +{ + free_pages (); + grub_dl_unref (my_mod); + loaded = 0; + return GRUB_ERR_NONE; +} + +static grub_err_t +grub_load_elf64 (grub_file_t file, void *buffer, const char *filename) +{ + Elf64_Ehdr *ehdr = (Elf64_Ehdr *) buffer; + Elf64_Phdr *phdr; + int i; + grub_uint64_t low_addr; + grub_uint64_t high_addr; + grub_uint64_t align; + grub_uint64_t reloc_offset; + const char *relocate; + + if (ehdr->e_ident[EI_MAG0] != ELFMAG0 + || ehdr->e_ident[EI_MAG1] != ELFMAG1 + || ehdr->e_ident[EI_MAG2] != ELFMAG2 + || ehdr->e_ident[EI_MAG3] != ELFMAG3 + || ehdr->e_ident[EI_DATA] != ELFDATA2LSB) + return grub_error(GRUB_ERR_UNKNOWN_OS, + N_("invalid arch-independent ELF magic")); + + if (ehdr->e_ident[EI_CLASS] != ELFCLASS64 + || ehdr->e_version != EV_CURRENT + || ehdr->e_machine != EM_IA_64) + return grub_error (GRUB_ERR_UNKNOWN_OS, + N_("invalid arch-dependent ELF magic")); + + if (ehdr->e_type != ET_EXEC) + return grub_error (GRUB_ERR_UNKNOWN_OS, + N_("this ELF file is not of the right type")); + + /* FIXME: Should we support program headers at strange locations? */ + if (ehdr->e_phoff + ehdr->e_phnum * ehdr->e_phentsize > GRUB_ELF_SEARCH) + return grub_error (GRUB_ERR_BAD_OS, "program header at a too high offset"); + + entry = ehdr->e_entry; + + /* Compute low, high and align addresses. */ + low_addr = ~0UL; + high_addr = 0; + align = 0; + for (i = 0; i < ehdr->e_phnum; i++) + { + phdr = (Elf64_Phdr *) ((char *) buffer + ehdr->e_phoff + + i * ehdr->e_phentsize); + if (phdr->p_type == PT_LOAD) + { + if (phdr->p_paddr < low_addr) + low_addr = phdr->p_paddr; + if (phdr->p_paddr + phdr->p_memsz > high_addr) + high_addr = phdr->p_paddr + phdr->p_memsz; + if (phdr->p_align > align) + align = phdr->p_align; + } + } + + if (align < ALIGN_MIN) + align = ALIGN_MIN; + + if (high_addr == 0) + return grub_error (GRUB_ERR_BAD_OS, "no program entries"); + + kernel_pages = page_align (high_addr - low_addr) >> 12; + + /* Undocumented on purpose. */ + relocate = grub_env_get ("linux_relocate"); + if (!relocate || grub_strcmp (relocate, "force") != 0) + { + kernel_mem = grub_efi_allocate_fixed (low_addr, kernel_pages); + reloc_offset = 0; + } + /* Try to relocate. */ + if (! kernel_mem && (!relocate || grub_strcmp (relocate, "off") != 0)) + { + kernel_mem = allocate_pages (align, kernel_pages, low_addr); + if (kernel_mem) + { + reloc_offset = (grub_uint64_t)kernel_mem - low_addr; + grub_dprintf ("linux", " Relocated at %p (offset=%016lx)\n", + kernel_mem, reloc_offset); + entry += reloc_offset; + } + } + if (! kernel_mem) + return grub_error (GRUB_ERR_OUT_OF_MEMORY, + "cannot allocate memory for OS"); + + /* Load every loadable segment in memory. */ + for (i = 0; i < ehdr->e_phnum; i++) + { + phdr = (Elf64_Phdr *) ((char *) buffer + ehdr->e_phoff + + i * ehdr->e_phentsize); + if (phdr->p_type == PT_LOAD) + { + grub_dprintf ("linux", " [paddr=%lx load=%lx memsz=%08lx " + "off=%lx flags=%x]\n", + phdr->p_paddr, phdr->p_paddr + reloc_offset, + phdr->p_memsz, phdr->p_offset, phdr->p_flags); + + if (grub_file_seek (file, phdr->p_offset) == (grub_off_t)-1) + return grub_errno; + + if (grub_file_read (file, (void *) (phdr->p_paddr + reloc_offset), + phdr->p_filesz) + != (grub_ssize_t) phdr->p_filesz) + { + if (!grub_errno) + grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"), + filename); + return grub_errno; + } + + if (phdr->p_filesz < phdr->p_memsz) + grub_memset + ((char *)(phdr->p_paddr + reloc_offset + phdr->p_filesz), + 0, phdr->p_memsz - phdr->p_filesz); + + /* Sync caches if necessary. */ + if (phdr->p_flags & PF_X) + grub_arch_sync_caches + ((void *)(phdr->p_paddr + reloc_offset), phdr->p_memsz); + } + } + loaded = 1; + return 0; +} + +static grub_err_t +grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)), + int argc, char *argv[]) +{ + grub_file_t file = 0; + char buffer[GRUB_ELF_SEARCH]; + char *cmdline, *p; + grub_ssize_t len; + int i; + + grub_dl_ref (my_mod); + + grub_loader_unset (); + + if (argc == 0) + { + grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected")); + goto fail; + } + + file = grub_file_open (argv[0], GRUB_FILE_TYPE_LINUX_KERNEL); + if (! file) + goto fail; + + len = grub_file_read (file, buffer, sizeof (buffer)); + if (len < (grub_ssize_t) sizeof (Elf64_Ehdr)) + { + if (!grub_errno) + grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"), + argv[0]); + goto fail; + } + + grub_dprintf ("linux", "Loading linux: %s\n", argv[0]); + + if (grub_load_elf64 (file, buffer, argv[0])) + goto fail; + + len = sizeof("BOOT_IMAGE=") + 8; + for (i = 0; i < argc; i++) + len += grub_strlen (argv[i]) + 1; + len += sizeof (struct ia64_boot_param) + 512; /* Room for extensions. */ + boot_param_pages = page_align (len) >> 12; + boot_param = grub_efi_allocate_any_pages (boot_param_pages); + if (boot_param == 0) + { + grub_error (GRUB_ERR_OUT_OF_MEMORY, + "cannot allocate memory for bootparams"); + goto fail; + } + + grub_memset (boot_param, 0, len); + cmdline = ((char *)(boot_param + 1)) + 256; + + /* Build cmdline. */ + p = grub_stpcpy (cmdline, "BOOT_IMAGE"); + for (i = 0; i < argc; i++) + { + *p++ = ' '; + p = grub_stpcpy (p, argv[i]); + } + cmdline[10] = '='; + + *p = '\0'; + + if (grub_verify_string (cmdline, GRUB_VERIFY_KERNEL_CMDLINE)) + goto fail; + + boot_param->command_line = (grub_uint64_t) cmdline; + boot_param->efi_systab = (grub_uint64_t) grub_efi_system_table; + + grub_errno = GRUB_ERR_NONE; + + grub_loader_set (grub_linux_boot, grub_linux_unload, 0); + + fail: + if (file) + grub_file_close (file); + + if (grub_errno != GRUB_ERR_NONE) + { + grub_efi_free_pages ((grub_efi_physical_address_t) boot_param, + boot_param_pages); + 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[]) +{ + struct grub_linux_initrd_context initrd_ctx = { 0, 0, 0 }; + + if (argc == 0) + { + grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected")); + goto fail; + } + + if (! loaded) + { + grub_error (GRUB_ERR_BAD_ARGUMENT, N_("you need to load the kernel first")); + goto fail; + } + + if (grub_initrd_init (argc, argv, &initrd_ctx)) + goto fail; + + initrd_size = grub_get_initrd_size (&initrd_ctx); + grub_dprintf ("linux", "Loading initrd\n"); + + initrd_pages = (page_align (initrd_size) >> 12); + initrd_mem = grub_efi_allocate_any_pages (initrd_pages); + if (! initrd_mem) + { + grub_error (GRUB_ERR_OUT_OF_MEMORY, "cannot allocate pages"); + goto fail; + } + + grub_dprintf ("linux", "[addr=0x%lx, size=0x%lx]\n", + (grub_uint64_t) initrd_mem, initrd_size); + + if (grub_initrd_load (&initrd_ctx, argv, initrd_mem)) + goto fail; + fail: + grub_initrd_close (&initrd_ctx); + return grub_errno; +} + +static grub_err_t +grub_cmd_fpswa (grub_command_t cmd __attribute__ ((unused)), + int argc __attribute__((unused)), + char *argv[] __attribute__((unused))) +{ + query_fpswa (); + if (fpswa == NULL) + grub_puts_ (N_("No FPSWA found")); + else + grub_printf (_("FPSWA revision: %x\n"), fpswa->revision); + return GRUB_ERR_NONE; +} + +static grub_command_t cmd_linux, cmd_initrd, cmd_fpswa; + +GRUB_MOD_INIT(linux) +{ + cmd_linux = grub_register_command ("linux", grub_cmd_linux, + N_("FILE [ARGS...]"), N_("Load Linux.")); + + cmd_initrd = grub_register_command ("initrd", grub_cmd_initrd, + N_("FILE"), N_("Load initrd.")); + + cmd_fpswa = grub_register_command ("fpswa", grub_cmd_fpswa, + "", N_("Display FPSWA version.")); + + my_mod = mod; +} + +GRUB_MOD_FINI(linux) +{ + grub_unregister_command (cmd_linux); + grub_unregister_command (cmd_initrd); + grub_unregister_command (cmd_fpswa); +} |