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+/*
+ * Copyright (c) 2010, 2012 Richard Braun.
+ *
+ * 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 3 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 _X86_MULTIBOOT_H
+#define _X86_MULTIBOOT_H
+
+/*
+ * Magic number provided by the OS to the boot loader.
+ */
+#define MULTIBOOT_OS_MAGIC 0x1badb002
+
+/*
+ * Multiboot flags requesting services from the boot loader.
+ */
+#define MULTIBOOT_OS_MEMORY_INFO 0x2
+
+#define MULTIBOOT_OS_FLAGS MULTIBOOT_OS_MEMORY_INFO
+
+/*
+ * Magic number to identify a multiboot compliant boot loader.
+ */
+#define MULTIBOOT_LOADER_MAGIC 0x2badb002
+
+/*
+ * Multiboot flags set by the boot loader.
+ */
+#define MULTIBOOT_LOADER_MEMORY 0x01
+#define MULTIBOOT_LOADER_CMDLINE 0x04
+#define MULTIBOOT_LOADER_MODULES 0x08
+#define MULTIBOOT_LOADER_SHDR 0x20
+#define MULTIBOOT_LOADER_MMAP 0x40
+
+#ifndef __ASSEMBLER__
+
+#include <kern/macros.h>
+#include <kern/stdint.h>
+
+/*
+ * A multiboot module.
+ */
+struct multiboot_raw_module {
+ uint32_t mod_start;
+ uint32_t mod_end;
+ uint32_t string;
+ uint32_t reserved;
+} __packed;
+
+/*
+ * Memory map entry.
+ */
+struct multiboot_raw_mmap_entry {
+ uint32_t size;
+ uint64_t base_addr;
+ uint64_t length;
+ uint32_t type;
+} __packed;
+
+/*
+ * Multiboot information structure as passed by the boot loader.
+ */
+struct multiboot_raw_info {
+ uint32_t flags;
+ uint32_t mem_lower;
+ uint32_t mem_upper;
+ uint32_t unused0;
+ uint32_t cmdline;
+ uint32_t mods_count;
+ uint32_t mods_addr;
+ uint32_t shdr_num;
+ uint32_t shdr_size;
+ uint32_t shdr_addr;
+ uint32_t shdr_strndx;
+ uint32_t mmap_length;
+ uint32_t mmap_addr;
+ uint32_t unused1[9];
+} __packed;
+
+/*
+ * Versions of the multiboot structures suitable for use with 64-bit pointers.
+ */
+
+struct multiboot_module {
+ void *mod_start;
+ void *mod_end;
+ char *string;
+};
+
+struct multiboot_info {
+ uint32_t flags;
+ char *cmdline;
+ struct multiboot_module *mods_addr;
+ uint32_t mods_count;
+};
+
+#endif /* __ASSEMBLER__ */
+
+#endif /* _X86_MULTIBOOT_H */