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Diffstat (limited to 'cfe/cfe/include/cfe_bootblock.h')
| -rw-r--r-- | cfe/cfe/include/cfe_bootblock.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/cfe/cfe/include/cfe_bootblock.h b/cfe/cfe/include/cfe_bootblock.h new file mode 100644 index 0000000..c3a93f0 --- /dev/null +++ b/cfe/cfe/include/cfe_bootblock.h @@ -0,0 +1,129 @@ +/* ********************************************************************* + * Broadcom Common Firmware Environment (CFE) + * + * Boot Block File: cfe_bootblock.h + * + * The structure of the boot block used on block-style devices + * like disks and CDROMs + * + * Author: Mitch Lichtenberg (mpl@broadcom.com) + * + ********************************************************************* + * + * Copyright 2000,2001,2002,2003 + * Broadcom Corporation. All rights reserved. + * + * This software is furnished under license and may be used and + * copied only in accordance with the following terms and + * conditions. Subject to these conditions, you may download, + * copy, install, use, modify and distribute modified or unmodified + * copies of this software in source and/or binary form. No title + * or ownership is transferred hereby. + * + * 1) Any source code used, modified or distributed must reproduce + * and retain this copyright notice and list of conditions + * as they appear in the source file. + * + * 2) No right is granted to use any trade name, trademark, or + * logo of Broadcom Corporation. The "Broadcom Corporation" + * name may not be used to endorse or promote products derived + * from this software without the prior written permission of + * Broadcom Corporation. + * + * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED + * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR + * PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT + * SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN + * PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR + * TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + ********************************************************************* */ + + +/* + * CFE boot block, modeled loosely on Alpha. + * + * It consists of: + * + * BSD disk label + * <blank space> + * Boot block info (5 u_int_64s) + * + * The boot block portion looks like: + * + * + * +-------+-------+-------+-------+-------+-------+-------+-------+ + * | BOOT_MAGIC_NUMBER | + * +-------+-------+-------+-------+-------+-------+-------+-------+ + * | Flags | Reserved | Vers | Header Checksum | + * +-------+-------+-------+-------+-------+-------+-------+-------+ + * | Secondary Loader Location (bytes) | + * +-------+-------+-------+-------+-------+-------+-------+-------+ + * | Loader Checksum | Size of loader (bytes) | + * +-------+-------+-------+-------+-------+-------+-------+-------+ + * | Reserved | Architecture Information | + * +-------+-------+-------+-------+-------+-------+-------+-------+ + * + * Boot block fields should always be read as 64-bit numbers. + * + */ + + +struct boot_block { + uint64_t bb_data[64]; /* data (disklabel, also as below) */ +}; +#define bb_magic bb_data[59] /* magic number */ +#define bb_hdrinfo bb_data[60] /* header checksum, ver, flags */ +#define bb_secstart bb_data[61] /* secondary start (bytes) */ +#define bb_secsize bb_data[62] /* secondary size (bytes) */ +#define bb_archinfo bb_data[63] /* architecture info */ + +#define BOOT_BLOCK_OFFSET 0 /* offset of boot block. */ +#define BOOT_BLOCK_BLOCKSIZE 512 /* block size for sec. size/start, + * and for boot block itself + */ +#define BOOT_BLOCK_SIZE 40 /* 5 64-bit words */ + +/* + * This is the highest block number that we look at when + * searching for a valid boot block + */ +#define BOOT_BLOCK_MAXLOC 16 + +/* + * Fields within the boot block + */ +#define _U64(x) ((uint64_t) x) +#define BOOT_MAGIC_NUMBER _U64(0x43465631424f4f54) +#define BOOT_HDR_CHECKSUM_MASK _U64(0x00000000FFFFFFFF) +#define BOOT_HDR_VER_MASK _U64(0x000000FF00000000) +#define BOOT_HDR_VER_SHIFT 32 +#define BOOT_HDR_FLAGS_MASK _U64(0xFF00000000000000) +#define BOOT_SECSIZE_MASK _U64(0x00000000FFFFFFFF) +#define BOOT_DATA_CHECKSUM_MASK _U64(0xFFFFFFFF00000000) +#define BOOT_DATA_CHECKSUM_SHIFT 32 +#define BOOT_ARCHINFO_MASK _U64(0x00000000FFFFFFFF) + +#define BOOT_HDR_VERSION 1 + +#define CHECKSUM_BOOT_DATA(data,len,cksum) \ + do { \ + uint32_t *_ptr = (uint32_t *) (data); \ + uint32_t _cksum; \ + int _i; \ + \ + _cksum = 0; \ + for (_i = 0; \ + _i < ((len) / sizeof (uint32_t)); \ + _i++) \ + _cksum += _ptr[_i]; \ + *(cksum) = _cksum; \ + } while (0) + + |