Add support for CONFIG_EFI_PARTITION (GUID Partition Table)

The GUID (Globally Unique Identifier) Partition Table (GPT) is a part
of EFI. See http://en.wikipedia.org/wiki/GUID_Partition_Table

Based on linux/fs/partitions/efi.[ch]

Signed-off-by: Richard Retanubun <RichardRetanubun@RugggedCom.com>

1 files changed, 138 insertions, 0 deletions

diff --git a/disk/part_efi.h b/disk/part_efi.h
new file mode 100644
index 0000000..aad905d
--- /dev/null
+++ b/disk/part_efi.h
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2008 RuggedCom, Inc.
+ * Richard Retanubun <RichardRetanubun@RuggedCom.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * See also linux/fs/partitions/efi.h
+ *
+ * EFI GUID Partition Table
+ * Per Intel EFI Specification v1.02
+ * http://developer.intel.com/technology/efi/efi.htm
+*/
+
+#ifndef _DISK_PART_EFI_H
+#define _DISK_PART_EFI_H
+
+#define MSDOS_MBR_SIGNATURE 0xAA55
+#define EFI_PMBR_OSTYPE_EFI 0xEF
+#define EFI_PMBR_OSTYPE_EFI_GPT 0xEE
+
+#define GPT_BLOCK_SIZE 512
+#define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
+#define GPT_HEADER_REVISION_V1 0x00010000
+#define GPT_PRIMARY_PARTITION_TABLE_LBA 1ULL
+#define GPT_ENTRY_NAME "gpt"
+
+#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
+((efi_guid_t) \
+{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
+  (b) & 0xff, ((b) >> 8) & 0xff, \
+  (c) & 0xff, ((c) >> 8) & 0xff, \
+  (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
+
+#define PARTITION_SYSTEM_GUID \
+    EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \
+              0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)
+#define LEGACY_MBR_PARTITION_GUID \
+    EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \
+              0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F)
+#define PARTITION_MSFT_RESERVED_GUID \
+    EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \
+              0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE)
+#define PARTITION_BASIC_DATA_GUID \
+    EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \
+              0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7)
+#define PARTITION_LINUX_RAID_GUID \
+    EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \
+              0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e)
+#define PARTITION_LINUX_SWAP_GUID \
+    EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \
+              0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f)
+#define PARTITION_LINUX_LVM_GUID \
+    EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \
+              0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28)
+
+/* linux/include/efi.h */
+typedef unsigned short efi_char16_t;
+
+typedef struct {
+	unsigned char b[16];
+} efi_guid_t;
+
+/* based on linux/include/genhd.h */
+struct partition {
+	unsigned char boot_ind;	/* 0x80 - active */
+	unsigned char head;	/* starting head */
+	unsigned char sector;	/* starting sector */
+	unsigned char cyl;	/* starting cylinder */
+	unsigned char sys_ind;	/* What partition type */
+	unsigned char end_head;	/* end head */
+	unsigned char end_sector;	/* end sector */
+	unsigned char end_cyl;	/* end cylinder */
+	unsigned char start_sect[4];	/* starting sector counting from 0 */
+	unsigned char nr_sects[4];	/* nr of sectors in partition */
+} __attribute__ ((packed));
+
+/* based on linux/fs/partitions/efi.h */
+typedef struct _gpt_header {
+	unsigned char signature[8];
+	unsigned char revision[4];
+	unsigned char header_size[4];
+	unsigned char header_crc32[4];
+	unsigned char reserved1[4];
+	unsigned char my_lba[8];
+	unsigned char alternate_lba[8];
+	unsigned char first_usable_lba[8];
+	unsigned char last_usable_lba[8];
+	efi_guid_t disk_guid;
+	unsigned char partition_entry_lba[8];
+	unsigned char num_partition_entries[4];
+	unsigned char sizeof_partition_entry[4];
+	unsigned char partition_entry_array_crc32[4];
+	unsigned char reserved2[GPT_BLOCK_SIZE - 92];
+} __attribute__ ((packed)) gpt_header;
+
+typedef struct _gpt_entry_attributes {
+	unsigned long long required_to_function:1;
+	unsigned long long reserved:47;
+	unsigned long long type_guid_specific:16;
+} __attribute__ ((packed)) gpt_entry_attributes;
+
+typedef struct _gpt_entry {
+	efi_guid_t partition_type_guid;
+	efi_guid_t unique_partition_guid;
+	unsigned char starting_lba[8];
+	unsigned char ending_lba[8];
+	gpt_entry_attributes attributes;
+	efi_char16_t partition_name[72 / sizeof(efi_char16_t)];
+}
+__attribute__ ((packed)) gpt_entry;
+
+typedef struct _legacy_mbr {
+	unsigned char boot_code[440];
+	unsigned char unique_mbr_signature[4];
+	unsigned char unknown[2];
+	struct partition partition_record[4];
+	unsigned char signature[2];
+} __attribute__ ((packed)) legacy_mbr;
+
+#endif				/* _DISK_PART_EFI_H */