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
#include <boot/elf.h>
#include <boot/elf_boot.h>
#include <string.h>
+#include <cpu/x86/multiboot.h>
#ifndef CMD_LINE
" 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"
::
"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
);
}
--- /dev/null
+/*
+ * 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;
+}
#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
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);
# 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
--- /dev/null
+/* 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
projects / coreboot.git / commitdiff