Author: jcrouse Date: 2008-11-11 21:20:54 +0100 (Tue, 11 Nov 2008) New Revision: 3745
Added: trunk/coreboot-v2/src/arch/i386/boot/multiboot.c trunk/coreboot-v2/src/include/cpu/x86/multiboot.h Modified: trunk/coreboot-v2/src/arch/i386/boot/Config.lb trunk/coreboot-v2/src/arch/i386/boot/boot.c trunk/coreboot-v2/src/arch/i386/boot/tables.c trunk/coreboot-v2/src/config/Options.lb Log: [PATCH] coreboot-v2: Add multiboot support
Signed-off-by: Robert Millan rmh@aybabtu.com Acked-by: Jordan Crouse jordan@cosmicpneguin.net Acked-by: Peter Stuge peter@stuge.se
Modified: trunk/coreboot-v2/src/arch/i386/boot/Config.lb =================================================================== --- trunk/coreboot-v2/src/arch/i386/boot/Config.lb 2008-11-11 19:53:42 UTC (rev 3744) +++ trunk/coreboot-v2/src/arch/i386/boot/Config.lb 2008-11-11 20:20:54 UTC (rev 3745) @@ -1,8 +1,12 @@ uses HAVE_PIRQ_TABLE uses HAVE_ACPI_TABLES +uses CONFIG_MULTIBOOT
object boot.o object coreboot_table.o +if CONFIG_MULTIBOOT +object multiboot.o +end object tables.o if HAVE_PIRQ_TABLE object pirq_routing.o
Modified: trunk/coreboot-v2/src/arch/i386/boot/boot.c =================================================================== --- trunk/coreboot-v2/src/arch/i386/boot/boot.c 2008-11-11 19:53:42 UTC (rev 3744) +++ trunk/coreboot-v2/src/arch/i386/boot/boot.c 2008-11-11 20:20:54 UTC (rev 3745) @@ -3,6 +3,7 @@ #include <boot/elf.h> #include <boot/elf_boot.h> #include <string.h> +#include <cpu/x86/multiboot.h>
#ifndef CMD_LINE @@ -139,7 +140,7 @@ " rep movsl\n\t"
/* Now jump to the loaded image */ - " movl $0x0E1FB007, %%eax\n\t" + " movl %5, %%eax\n\t" " movl 0(%%esp), %%ebx\n\t" " call *4(%%esp)\n\t"
@@ -175,7 +176,12 @@
:: "g" (lb_start), "g" (buffer), "g" (lb_size), - "g" (entry), "g"(adjusted_boot_notes) + "g" (entry), +#if CONFIG_MULTIBOOT + "g"(mbi), "g" (MB_MAGIC2) +#else + "g"(adjusted_boot_notes), "g" (0x0E1FB007) +#endif ); }
Added: trunk/coreboot-v2/src/arch/i386/boot/multiboot.c =================================================================== --- trunk/coreboot-v2/src/arch/i386/boot/multiboot.c (rev 0) +++ trunk/coreboot-v2/src/arch/i386/boot/multiboot.c 2008-11-11 20:20:54 UTC (rev 3745) @@ -0,0 +1,117 @@ +/* + * support for Multiboot payloads + * + * Copyright (C) 2008 Robert Millan + * + * This program 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 2 of the License, or + * (at your option) any later version. + * + * This program 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 this program; if not, see http://www.gnu.org/licenses/. + * + */ + +#include <cpu/x86/multiboot.h> +#include <string.h> +#include <device/resource.h> +#include <console/console.h> + +typedef unsigned long long u64; + +static struct multiboot_mmap_entry *mb_mem; +struct multiboot_info *mbi; + +static struct { + u64 addr; + u64 len; +} reserved_mem[2]; + +static void build_mb_mem_range_nooverlap(u64 addr, u64 len) +{ + int i; + for (i = 0; i < sizeof(reserved_mem) / sizeof(reserved_mem[0]); i++) { + /* free region fully contained in reserved region, abort */ + if (addr >= reserved_mem[i].addr && addr + len <= reserved_mem[i].addr + reserved_mem[i].len) + return; + /* reserved region splits free region */ + if (addr < reserved_mem[i].addr && addr + len > reserved_mem[i].addr + reserved_mem[i].len) { + build_mb_mem_range_nooverlap(addr, reserved_mem[i].addr - addr); + build_mb_mem_range_nooverlap(reserved_mem[i].addr + reserved_mem[i].len, (addr + len) - (reserved_mem[i].addr + reserved_mem[i].len)); + return; + } + /* left overlap */ + if (addr < reserved_mem[i].addr + reserved_mem[i].len && addr + len > reserved_mem[i].addr + reserved_mem[i].len) { + len += addr; + addr = reserved_mem[i].addr + reserved_mem[i].len; + len -= addr; + /* len += addr - old_addr */ + continue; + } + /* right overlap */ + if (addr < reserved_mem[i].addr && addr + len > reserved_mem[i].addr) { + len = reserved_mem[i].addr - addr; + continue; + } + /* none of the above, just add it */ + } + + mb_mem->addr = addr; + mb_mem->len = len; + mb_mem->type = 1; + mb_mem->size = sizeof(*mb_mem) - sizeof(mb_mem->size); + mb_mem++; +} + +static void build_mb_mem_range(void *gp, struct device *dev, struct resource *res) +{ + build_mb_mem_range_nooverlap(res->base, res->size); +} + +#define ROUND(_r,_a) ((_r) + (((_a) - 1)) & ~((_a) - 1)) + +unsigned long write_multiboot_info( + unsigned long low_table_start, unsigned long low_table_end, + unsigned long rom_table_start, unsigned long rom_table_end) +{ + struct multiboot_info *mbi; + int i; + + mbi = rom_table_end; + memset(mbi, 0, sizeof(*mbi)); + rom_table_end += sizeof(*mbi); + + mbi->mmap_addr = (u32) rom_table_end; + mb_mem = rom_table_end; + + /* reserved regions */ + reserved_mem[0].addr = low_table_start; + reserved_mem[0].len = ROUND(low_table_end - low_table_start, 4096); + reserved_mem[1].addr = rom_table_start; + reserved_mem[1].len = ROUND(rom_table_end - rom_table_start, 4096); + + for (i = 0; i < sizeof(reserved_mem) / sizeof(reserved_mem[0]); i++) { + mb_mem->addr = reserved_mem[i].addr; + mb_mem->len = reserved_mem[i].len; + mb_mem->type = 2; + mb_mem->size = sizeof(*mb_mem) - sizeof(mb_mem->size); + mb_mem++; + } + + /* free regions */ + search_global_resources( IORESOURCE_MEM | IORESOURCE_CACHEABLE, + IORESOURCE_MEM | IORESOURCE_CACHEABLE, build_mb_mem_range, NULL); + + mbi->mmap_length = ((u32) mb_mem) - mbi->mmap_addr; + mbi->flags |= MB_INFO_MEM_MAP; + + printk_info("Multiboot Information structure has been written.\n"); + + return mb_mem; +}
Modified: trunk/coreboot-v2/src/arch/i386/boot/tables.c =================================================================== --- trunk/coreboot-v2/src/arch/i386/boot/tables.c 2008-11-11 19:53:42 UTC (rev 3744) +++ trunk/coreboot-v2/src/arch/i386/boot/tables.c 2008-11-11 20:20:54 UTC (rev 3745) @@ -9,6 +9,7 @@ #include <arch/smp/mpspec.h> #include <arch/acpi.h> #include <string.h> +#include <cpu/x86/multiboot.h> #include "coreboot_table.h"
// Global Descriptor Table, defined in c_start.S @@ -106,6 +107,14 @@ move_gdt(low_table_end); low_table_end += &gdt_end - &gdt;
+#if CONFIG_MULTIBOOT + /* The Multiboot information structure */ + mbi = rom_table_end; + rom_table_end = write_multiboot_info( + low_table_start, low_table_end, + rom_table_start, rom_table_end); +#endif + /* The coreboot table must be in 0-4K or 960K-1M */ write_coreboot_table(low_table_start, low_table_end, rom_table_start, rom_table_end);
Modified: trunk/coreboot-v2/src/config/Options.lb =================================================================== --- trunk/coreboot-v2/src/config/Options.lb 2008-11-11 19:53:42 UTC (rev 3744) +++ trunk/coreboot-v2/src/config/Options.lb 2008-11-11 20:20:54 UTC (rev 3745) @@ -608,6 +608,11 @@ # Boot options ###############################################
+define CONFIG_MULTIBOOT + default 1 + export always + comment "Use Multiboot (rather than ELF boot notes) to boot the payload" +end define CONFIG_IDE_PAYLOAD default 0 export always
Added: trunk/coreboot-v2/src/include/cpu/x86/multiboot.h =================================================================== --- trunk/coreboot-v2/src/include/cpu/x86/multiboot.h (rev 0) +++ trunk/coreboot-v2/src/include/cpu/x86/multiboot.h 2008-11-11 20:20:54 UTC (rev 3745) @@ -0,0 +1,175 @@ +/* multiboot.h - multiboot header file. */ +/* + * Copyright (C) 2003 Free Software Foundation, Inc. + * Copyright (C) 2008 Robert Millan + * + * This program 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 2 of the License, or + * (at your option) any later version. + * + * This program 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 this program; if not, see http://www.gnu.org/licenses/. + */ + +#ifndef MULTIBOOT_H +#define MULTIBOOT_H + +#include <stdint.h> + +/* How many bytes from the start of the file we search for the header. */ +#define MB_SEARCH 8192 + +/* The magic field should contain this. */ +#define MB_MAGIC 0x1BADB002 + +/* This should be in %eax. */ +#define MB_MAGIC2 0x2BADB002 + +/* The bits in the required part of flags field we don't support. */ +#define MB_UNSUPPORTED 0x0000fffc + +/* Alignment of multiboot modules. */ +#define MB_MOD_ALIGN 0x00001000 + +/* + * Flags set in the 'flags' member of the multiboot header. + */ + +/* Align all boot modules on i386 page (4KB) boundaries. */ +#define MB_PAGE_ALIGN 0x00000001 + +/* Must pass memory information to OS. */ +#define MB_MEMORY_INFO 0x00000002 + +/* Must pass video information to OS. */ +#define MB_VIDEO_MODE 0x00000004 + +/* This flag indicates the use of the address fields in the header. */ +#define MB_AOUT_KLUDGE 0x00010000 + +/* + * Flags to be set in the 'flags' member of the multiboot info structure. + */ + +/* is there basic lower/upper memory information? */ +#define MB_INFO_MEMORY 0x00000001 +/* is there a boot device set? */ +#define MB_INFO_BOOTDEV 0x00000002 +/* is the command-line defined? */ +#define MB_INFO_CMDLINE 0x00000004 +/* are there modules to do something with? */ +#define MB_INFO_MODS 0x00000008 + +/* These next two are mutually exclusive */ + +/* is there a symbol table loaded? */ +#define MB_INFO_AOUT_SYMS 0x00000010 +/* is there an ELF section header table? */ +#define MB_INFO_ELF_SHDR 0x00000020 + +/* is there a full memory map? */ +#define MB_INFO_MEM_MAP 0x00000040 + +/* Is there drive info? */ +#define MB_INFO_DRIVE_INFO 0x00000080 + +/* Is there a config table? */ +#define MB_INFO_CONFIG_TABLE 0x00000100 + +/* Is there a boot loader name? */ +#define MB_INFO_BOOT_LOADER_NAME 0x00000200 + +/* Is there a APM table? */ +#define MB_INFO_APM_TABLE 0x00000400 + +/* Is there video information? */ +#define MB_INFO_VIDEO_INFO 0x00000800 + +struct multiboot_header { + /* Must be MB_MAGIC - see above. */ + uint32_t magic; + + /* Feature flags. */ + uint32_t flags; + + /* The above fields plus this one must equal 0 mod 2^32. */ + uint32_t checksum; + + /* These are only valid if MB_AOUT_KLUDGE is set. */ + uint32_t header_addr; + uint32_t load_addr; + uint32_t load_end_addr; + uint32_t bss_end_addr; + uint32_t entry_addr; + + /* These are only valid if MB_VIDEO_MODE is set. */ + uint32_t mode_type; + uint32_t width; + uint32_t height; + uint32_t depth; +}; + +struct multiboot_info { + /* Multiboot info version number */ + uint32_t flags; + + /* Available memory from BIOS */ + uint32_t mem_lower; + uint32_t mem_upper; + + /* "root" partition */ + uint32_t boot_device; + + /* Kernel command line */ + uint32_t cmdline; + + /* Boot-Module list */ + uint32_t mods_count; + uint32_t mods_addr; + + uint32_t syms[4]; + + /* Memory Mapping buffer */ + uint32_t mmap_length; + uint32_t mmap_addr; + + /* Drive Info buffer */ + uint32_t drives_length; + uint32_t drives_addr; + + /* ROM configuration table */ + uint32_t config_table; + + /* Boot Loader Name */ + uint32_t boot_loader_name; + + /* APM table */ + uint32_t apm_table; + + /* Video */ + uint32_t vbe_control_info; + uint32_t vbe_mode_info; + uint16_t vbe_mode; + uint16_t vbe_interface_seg; + uint16_t vbe_interface_off; + uint16_t vbe_interface_len; +}; + +struct multiboot_mmap_entry { + uint32_t size; + uint64_t addr; + uint64_t len; + uint32_t type; +} __attribute__ ((packed)); + +extern struct multiboot_info *mbi; + +unsigned long write_multiboot_info(unsigned long, unsigned long, unsigned long, unsigned long); + +#endif