From 81af3d4a0077f354029e92aea71eb737d20f6a3e Mon Sep 17 00:00:00 2001 From: Robert Millan Date: Tue, 11 Nov 2008 20:20:54 +0000 Subject: [PATCH] coreboot-v2: Add multiboot support Signed-off-by: Robert Millan Acked-by: Jordan Crouse Acked-by: Peter Stuge git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3745 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1 --- src/arch/i386/boot/Config.lb | 4 ++ src/arch/i386/boot/boot.c | 10 +++- src/arch/i386/boot/multiboot.c | 117 +++++++++++++++++++++++++++++++++++++++++ src/arch/i386/boot/tables.c | 9 ++++ 4 files changed, 138 insertions(+), 2 deletions(-) create mode 100644 src/arch/i386/boot/multiboot.c (limited to 'src/arch/i386') diff --git a/src/arch/i386/boot/Config.lb b/src/arch/i386/boot/Config.lb index 4f8a8680ec..bacd1b0181 100644 --- a/src/arch/i386/boot/Config.lb +++ b/src/arch/i386/boot/Config.lb @@ -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 diff --git a/src/arch/i386/boot/boot.c b/src/arch/i386/boot/boot.c index edba2d1c3d..c1cdf594a4 100644 --- a/src/arch/i386/boot/boot.c +++ b/src/arch/i386/boot/boot.c @@ -3,6 +3,7 @@ #include #include #include +#include #ifndef CMD_LINE @@ -139,7 +140,7 @@ void jmp_to_elf_entry(void *entry, unsigned long buffer) " 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 @@ void jmp_to_elf_entry(void *entry, unsigned long buffer) :: "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 ); } diff --git a/src/arch/i386/boot/multiboot.c b/src/arch/i386/boot/multiboot.c new file mode 100644 index 0000000000..af9b625877 --- /dev/null +++ b/src/arch/i386/boot/multiboot.c @@ -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 . + * + */ + +#include +#include +#include +#include + +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; +} diff --git a/src/arch/i386/boot/tables.c b/src/arch/i386/boot/tables.c index 373a0f9bfc..5201010f01 100644 --- a/src/arch/i386/boot/tables.c +++ b/src/arch/i386/boot/tables.c @@ -9,6 +9,7 @@ #include #include #include +#include #include "coreboot_table.h" // Global Descriptor Table, defined in c_start.S @@ -106,6 +107,14 @@ struct lb_memory *write_tables(void) 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); -- cgit v1.2.3