diff options
Diffstat (limited to 'grub-core/kern/i386/coreboot')
| -rw-r--r-- | grub-core/kern/i386/coreboot/cbtable.c | 44 | ||||
| -rw-r--r-- | grub-core/kern/i386/coreboot/init.c | 143 | ||||
| -rw-r--r-- | grub-core/kern/i386/coreboot/startup.S | 62 |
3 files changed, 249 insertions, 0 deletions
diff --git a/grub-core/kern/i386/coreboot/cbtable.c b/grub-core/kern/i386/coreboot/cbtable.c new file mode 100644 index 0000000..34a2b59 --- /dev/null +++ b/grub-core/kern/i386/coreboot/cbtable.c @@ -0,0 +1,44 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2007,2008,2013 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/i386/coreboot/memory.h> +#include <grub/coreboot/lbio.h> +#include <grub/types.h> +#include <grub/err.h> +#include <grub/misc.h> +#include <grub/dl.h> + +GRUB_MOD_LICENSE ("GPLv3+"); + +grub_linuxbios_table_header_t +grub_linuxbios_get_tables (void) +{ + grub_linuxbios_table_header_t table_header; + /* Assuming table_header is aligned to its size (8 bytes). */ + for (table_header = (grub_linuxbios_table_header_t) 0x500; + table_header < (grub_linuxbios_table_header_t) 0x1000; table_header++) + if (grub_linuxbios_check_signature (table_header)) + return table_header; + + for (table_header = (grub_linuxbios_table_header_t) 0xf0000; + table_header < (grub_linuxbios_table_header_t) 0x100000; table_header++) + if (grub_linuxbios_check_signature (table_header)) + return table_header; + + return 0; +} diff --git a/grub-core/kern/i386/coreboot/init.c b/grub-core/kern/i386/coreboot/init.c new file mode 100644 index 0000000..3314f02 --- /dev/null +++ b/grub-core/kern/i386/coreboot/init.c @@ -0,0 +1,143 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009,2013 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/mm.h> +#include <grub/machine/time.h> +#include <grub/machine/memory.h> +#include <grub/machine/console.h> +#include <grub/offsets.h> +#include <grub/types.h> +#include <grub/err.h> +#include <grub/dl.h> +#include <grub/misc.h> +#include <grub/loader.h> +#include <grub/env.h> +#include <grub/cache.h> +#include <grub/time.h> +#include <grub/symbol.h> +#include <grub/cpu/io.h> +#include <grub/cpu/floppy.h> +#include <grub/cpu/tsc.h> +#include <grub/video.h> + +extern grub_uint8_t _start[]; +extern grub_uint8_t _end[]; +extern grub_uint8_t _edata[]; + +void __attribute__ ((noreturn)) +grub_exit (void) +{ + /* We can't use grub_fatal() in this function. This would create an infinite + loop, since grub_fatal() calls grub_abort() which in turn calls grub_exit(). */ + while (1) + grub_cpu_idle (); +} + +grub_addr_t grub_modbase = GRUB_KERNEL_I386_COREBOOT_MODULES_ADDR; +static grub_uint64_t modend; +static int have_memory = 0; + +/* Helper for grub_machine_init. */ +static int +heap_init (grub_uint64_t addr, grub_uint64_t size, grub_memory_type_t type, + void *data __attribute__ ((unused))) +{ + grub_uint64_t begin = addr, end = addr + size; + +#if GRUB_CPU_SIZEOF_VOID_P == 4 + /* Restrict ourselves to 32-bit memory space. */ + if (begin > GRUB_ULONG_MAX) + return 0; + if (end > GRUB_ULONG_MAX) + end = GRUB_ULONG_MAX; +#endif + + if (type != GRUB_MEMORY_AVAILABLE) + return 0; + + /* Avoid the lower memory. */ + if (begin < GRUB_MEMORY_MACHINE_LOWER_SIZE) + begin = GRUB_MEMORY_MACHINE_LOWER_SIZE; + + if (modend && begin < modend) + begin = modend; + + if (end <= begin) + return 0; + + grub_mm_init_region ((void *) (grub_addr_t) begin, (grub_size_t) (end - begin)); + + have_memory = 1; + + return 0; +} + +#ifndef GRUB_MACHINE_MULTIBOOT + +void +grub_machine_init (void) +{ + modend = grub_modules_get_end (); + + grub_video_coreboot_fb_early_init (); + + grub_vga_text_init (); + + grub_machine_mmap_iterate (heap_init, NULL); + if (!have_memory) + grub_fatal ("No memory found"); + + grub_video_coreboot_fb_late_init (); + + grub_font_init (); + grub_gfxterm_init (); + + grub_tsc_init (); +} + +#else + +void +grub_machine_init (void) +{ + modend = grub_modules_get_end (); + + grub_vga_text_init (); + + grub_machine_mmap_init (); + grub_machine_mmap_iterate (heap_init, NULL); + + grub_tsc_init (); +} + +#endif + +void +grub_machine_get_bootlocation (char **device __attribute__ ((unused)), + char **path __attribute__ ((unused))) +{ +} + +void +grub_machine_fini (int flags) +{ + if (flags & GRUB_LOADER_FLAG_NORETURN) + grub_vga_text_fini (); + grub_stop_floppy (); +} diff --git a/grub-core/kern/i386/coreboot/startup.S b/grub-core/kern/i386/coreboot/startup.S new file mode 100644 index 0000000..df6adba --- /dev/null +++ b/grub-core/kern/i386/coreboot/startup.S @@ -0,0 +1,62 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2008 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/symbol.h> +#include <grub/machine/memory.h> +#include <grub/offsets.h> +#include <multiboot.h> +#include <multiboot2.h> + +/* + * Note: GRUB is compiled with the options -mrtd and -mregparm=3. + * So the first three arguments are passed in %eax, %edx, and %ecx, + * respectively, and if a function has a fixed number of arguments + * and the number if greater than three, the function must return + * with "ret $N" where N is ((the number of arguments) - 3) * 4. + */ + + .file "startup.S" + .text + .globl start, _start +start: +_start: +#ifdef GRUB_MACHINE_MULTIBOOT + cmpl $MULTIBOOT_BOOTLOADER_MAGIC, %eax + jne 0f + movl %ebx, EXT_C(startup_multiboot_info) +0: +#endif + + /* initialize the stack */ + movl $GRUB_MEMORY_MACHINE_PROT_STACK, %esp + + /* jump to the main body of C code */ + jmp EXT_C(grub_main) + +/* + * Support for booting GRUB from a Multiboot boot loader (e.g. GRUB itself). + */ + .p2align 2 /* force 4-byte alignment */ +multiboot_header: + /* magic */ + .long 0x1BADB002 + /* flags */ + .long MULTIBOOT_MEMORY_INFO + /* checksum */ + .long -0x1BADB002 - MULTIBOOT_MEMORY_INFO + |