From 8c46a785e3ae8d624b74bf1bc4af80b307466fd3 Mon Sep 17 00:00:00 2001 From: Vladimir 'phcoder' Serbinenko Date: Sat, 3 Apr 2010 14:14:48 +0200 Subject: [PATCH] mips multiboot2 support --- conf/mips.rmk | 7 +++++++ include/grub/i386/multiboot.h | 14 ++++++++++++++ include/grub/mips/multiboot.h | 36 +++++++++++++++++++++++++++++++++++ include/multiboot2.h | 3 ++- loader/i386/multiboot.c | 18 ++++++------------ loader/i386/multiboot_elfxx.c | 4 ++-- loader/i386/multiboot_mbi2.c | 3 ++- 7 files changed, 69 insertions(+), 16 deletions(-) create mode 100644 include/grub/mips/multiboot.h diff --git a/conf/mips.rmk b/conf/mips.rmk index face4127d..1776a5d18 100644 --- a/conf/mips.rmk +++ b/conf/mips.rmk @@ -30,4 +30,11 @@ relocator_mod_CFLAGS = $(COMMON_CFLAGS) relocator_mod_ASFLAGS = $(COMMON_ASFLAGS) relocator_mod_LDFLAGS = $(COMMON_LDFLAGS) +pkglib_MODULES += multiboot2.mod +multiboot2_mod_SOURCES = loader/i386/multiboot.c \ + loader/i386/multiboot_mbi2.c +multiboot2_mod_CFLAGS = $(COMMON_CFLAGS) -DGRUB_USE_MULTIBOOT2 +multiboot2_mod_LDFLAGS = $(COMMON_LDFLAGS) +multiboot2_mod_ASFLAGS = $(COMMON_ASFLAGS) + include $(srcdir)/conf/common.mk diff --git a/include/grub/i386/multiboot.h b/include/grub/i386/multiboot.h index 8131e9477..1c711fad4 100644 --- a/include/grub/i386/multiboot.h +++ b/include/grub/i386/multiboot.h @@ -24,4 +24,18 @@ extern char *grub_multiboot_payload_orig; extern grub_addr_t grub_multiboot_payload_dest; extern grub_size_t grub_multiboot_payload_size; +#define MULTIBOOT_INITIAL_STATE { .eax = MULTIBOOT_BOOTLOADER_MAGIC, \ + .ecx = 0, \ + .edx = 0, \ + /* Set esp to some random location in low memory to avoid breaking */ \ + /* non-compliant kernels. */ \ + .esp = 0x7ff00 \ + } +#define MULTIBOOT_ENTRY_REGISTER eip +#define MULTIBOOT_MBI_REGISTER ebx +#define MULTIBOOT_ARCHITECTURE_CURRENT MULTIBOOT_ARCHITECTURE_I386 + +#define MULTIBOOT_ELF32_MACHINE EM_386 +#define MULTIBOOT_ELF64_MACHINE EM_X86_64 + #endif /* ! GRUB_MULTIBOOT_CPU_HEADER */ diff --git a/include/grub/mips/multiboot.h b/include/grub/mips/multiboot.h new file mode 100644 index 000000000..a27229efe --- /dev/null +++ b/include/grub/mips/multiboot.h @@ -0,0 +1,36 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2002,2003,2004,2007,2008,2009 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 . + */ + +#ifndef GRUB_MULTIBOOT_CPU_HEADER +#define GRUB_MULTIBOOT_CPU_HEADER 1 + +extern grub_uint32_t grub_multiboot_payload_eip; +extern char *grub_multiboot_payload_orig; +extern grub_addr_t grub_multiboot_payload_dest; +extern grub_size_t grub_multiboot_payload_size; + +#define MULTIBOOT_INITIAL_STATE { .gpr[4] = MULTIBOOT_BOOTLOADER_MAGIC, \ + .jumpreg = 1 } +#define MULTIBOOT_ENTRY_REGISTER gpr[1] +#define MULTIBOOT_MBI_REGISTER gpr[5] +#define MULTIBOOT_ARCHITECTURE_CURRENT MULTIBOOT_ARCHITECTURE_MIPS32 + +#define MULTIBOOT_ELF32_MACHINE EM_MIPS +#define MULTIBOOT_ELF64_MACHINE EM_MIPS + +#endif /* ! GRUB_MULTIBOOT_CPU_HEADER */ diff --git a/include/multiboot2.h b/include/multiboot2.h index 647109c0b..275debe75 100644 --- a/include/multiboot2.h +++ b/include/multiboot2.h @@ -61,7 +61,8 @@ #define MULTIBOOT_HEADER_TAG_FRAMEBUFFER 5 #define MULTIBOOT_HEADER_TAG_MODULE_ALIGN 6 -#define GRUB_MULTIBOOT_ARCHITECTURE_I386 0 +#define MULTIBOOT_ARCHITECTURE_I386 0 +#define MULTIBOOT_ARCHITECTURE_MIPS32 4 #define MULTIBOOT_HEADER_TAG_OPTIONAL 1 #define MULTIBOOT_CONSOLE_FLAGS_CONSOLE_REQUIRED 1 diff --git a/loader/i386/multiboot.c b/loader/i386/multiboot.c index 99d1cf906..1a22cd3a6 100644 --- a/loader/i386/multiboot.c +++ b/loader/i386/multiboot.c @@ -41,7 +41,7 @@ #include #include #include -#include +#include #include #include #include @@ -121,16 +121,9 @@ grub_multiboot_boot (void) { grub_size_t mbi_size; grub_err_t err; - struct grub_relocator32_state state = - { - .eax = MULTIBOOT_BOOTLOADER_MAGIC, - .ecx = 0, - .edx = 0, - .eip = grub_multiboot_payload_eip, - /* Set esp to some random location in low memory to avoid breaking - non-compliant kernels. */ - .esp = 0x7ff00 - }; + struct grub_relocator32_state state = MULTIBOOT_INITIAL_STATE; + + state.MULTIBOOT_ENTRY_REGISTER = grub_multiboot_payload_eip; mbi_size = grub_multiboot_get_mbi_size (); if (grub_multiboot_alloc_mbi < mbi_size) @@ -143,7 +136,8 @@ grub_multiboot_boot (void) grub_multiboot_alloc_mbi = mbi_size; } - state.ebx = grub_multiboot_payload_dest + grub_multiboot_pure_size; + state.MULTIBOOT_MBI_REGISTER = grub_multiboot_payload_dest + + grub_multiboot_pure_size; err = grub_multiboot_make_mbi (grub_multiboot_payload_orig, grub_multiboot_payload_dest, grub_multiboot_pure_size, mbi_size); diff --git a/loader/i386/multiboot_elfxx.c b/loader/i386/multiboot_elfxx.c index 05fb2c1c1..92a52d3a8 100644 --- a/loader/i386/multiboot_elfxx.c +++ b/loader/i386/multiboot_elfxx.c @@ -18,13 +18,13 @@ #if defined(MULTIBOOT_LOAD_ELF32) # define XX 32 -# define E_MACHINE EM_386 +# define E_MACHINE MULTIBOOT_ELF32_MACHINE # define ELFCLASSXX ELFCLASS32 # define Elf_Ehdr Elf32_Ehdr # define Elf_Phdr Elf32_Phdr #elif defined(MULTIBOOT_LOAD_ELF64) # define XX 64 -# define E_MACHINE EM_X86_64 +# define E_MACHINE MULTIBOOT_ELF64_MACHINE # define ELFCLASSXX ELFCLASS64 # define Elf_Ehdr Elf64_Ehdr # define Elf_Phdr Elf64_Phdr diff --git a/loader/i386/multiboot_mbi2.c b/loader/i386/multiboot_mbi2.c index 1910d656e..8b67f9383 100644 --- a/loader/i386/multiboot_mbi2.c +++ b/loader/i386/multiboot_mbi2.c @@ -90,7 +90,8 @@ grub_multiboot_load (grub_file_t file) { if (header->magic == MULTIBOOT_HEADER_MAGIC && !(header->magic + header->architecture - + header->header_length + header->checksum)) + + header->header_length + header->checksum) + && header->architecture == MULTIBOOT_ARCHITECTURE_CURRENT) break; }