1 files changed, 77 insertions, 0 deletions
diff --git a/src/arch/x86/boot/multiboot.c b/src/arch/x86/boot/multiboot.c
new file mode 100644
index 0000000000..4059f2736b
--- /dev/null
+++ b/src/arch/x86/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;
+}