diff options
Diffstat (limited to 'src/arch/armv7/boot/multiboot.c')
-rw-r--r-- | src/arch/armv7/boot/multiboot.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/src/arch/armv7/boot/multiboot.c b/src/arch/armv7/boot/multiboot.c new file mode 100644 index 0000000000..4059f2736b --- /dev/null +++ b/src/arch/armv7/boot/multiboot.c @@ -0,0 +1,77 @@ +/* + * 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> +#include <boot/coreboot_tables.h> +#include <arch/coreboot_tables.h> + +struct multiboot_info *mbi = NULL; + +unsigned long write_multiboot_info(unsigned long rom_table_end) +{ + static struct multiboot_mmap_entry *mb_mem; + struct lb_memory* coreboot_table; + int entries; + int i; + + mbi = (struct multiboot_info *)rom_table_end; + + memset(mbi, 0, sizeof(*mbi)); + rom_table_end += sizeof(*mbi); + + mbi->mmap_addr = (u32) rom_table_end; + mb_mem = (struct multiboot_mmap_entry *)rom_table_end; + + /* copy regions from coreboot tables */ + coreboot_table = get_lb_mem(); + entries = (coreboot_table->size - sizeof(*coreboot_table))/sizeof(coreboot_table->map[0]); + + if (coreboot_table == NULL || entries < 1) { + printk(BIOS_INFO, "%s: Cannot find coreboot table.\n", __func__); + return (unsigned long) mb_mem; + } + + for (i = 0; i < entries; i++) { + uint64_t entry_start = unpack_lb64(coreboot_table->map[i].start); + uint64_t entry_size = unpack_lb64(coreboot_table->map[i].size); + mb_mem->addr = entry_start; + mb_mem->len = entry_size; + switch (coreboot_table->map[i].type) { + case LB_MEM_RAM: + mb_mem->type = MULTIBOOT_MEMORY_AVAILABLE; + break; + default: // anything other than usable RAM + mb_mem->type = MULTIBOOT_MEMORY_RESERVED; + break; + } + mb_mem->size = sizeof(*mb_mem) - sizeof(mb_mem->size); + mb_mem++; + } + + mbi->mmap_length = ((u32) mb_mem) - mbi->mmap_addr; + mbi->flags |= MB_INFO_MEM_MAP; + + printk(BIOS_INFO, "Multiboot Information structure has been written.\n"); + + return (unsigned long)mb_mem; +} |