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author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-12-01 09:51:44 +1100 |
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committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-12-01 09:51:44 +1100 |
commit | aaad509cdca2ed5f2c92a26f5279ec0e89c4fd5f (patch) | |
tree | dfffc0d8f3d21f6736b7f09219c95e2370052d8a /lib/libnvram/nvram.h | |
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Initial import of slof-JX-1.7.0-4
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'lib/libnvram/nvram.h')
-rw-r--r-- | lib/libnvram/nvram.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/lib/libnvram/nvram.h b/lib/libnvram/nvram.h new file mode 100644 index 0000000..d15b85e --- /dev/null +++ b/lib/libnvram/nvram.h @@ -0,0 +1,90 @@ +/****************************************************************************** + * Copyright (c) 2004, 2008 IBM Corporation + * All rights reserved. + * This program and the accompanying materials + * are made available under the terms of the BSD License + * which accompanies this distribution, and is available at + * http://www.opensource.org/licenses/bsd-license.php + * + * Contributors: + * IBM Corporation - initial implementation + *****************************************************************************/ + +#ifndef __NVRAM_H +#define __NVRAM_H 1 + +/* data structures */ + +typedef struct { + unsigned long addr; + long len; +} partition_t; + +/* macros */ + +#define DEBUG(x...) +// #define DEBUG(x...) printf(x); + +#ifndef ALIGN +#define ALIGN(x, a) (((x) + ((a) - 1)) & ~((a) - 1)) +#endif + +#define NULL ((void *)0) + +#define PARTITION_HEADER_SIZE 16 + +/* FIXME this should be done complete and in a more prominent place */ +#define __LITTLE_ENDIAN 1234 +#define __BIG_ENDIAN 4321 +#ifdef __i386__ +#define __BYTE_ORDER __LITTLE_ENDIAN +#else +#define __BYTE_ORDER __BIG_ENDIAN +#endif +#if __BYTE_ORDER == __BIG_ENDIAN +#define cpu_to_be64(x) (x) +#define be64_to_cpu(x) (x) +#define cpu_to_be32(x) (x) +#define be32_to_cpu(x) (x) +#else +#include <byteswap.h> +#define cpu_to_be64(x) bswap_64(x) +#define be64_to_cpu(x) bswap_64(x) +#define cpu_to_be32(x) bswap_32(x) +#define be32_to_cpu(x) bswap_32(x) +#endif + +/* exported functions */ + +#define nvram_access_proto(type,name) \ + type nvram_read_##name(unsigned int offset); \ + void nvram_write_##name(unsigned int offset, type data); + +nvram_access_proto(uint8_t, byte) +nvram_access_proto(uint16_t, word) +nvram_access_proto(uint32_t, dword) +nvram_access_proto(uint64_t, qword) + +/* nvram.c */ + +char *get_nvram_buffer(int len); +void free_nvram_buffer(char *buffer); +int nvramlog_printf(const char* fmt, ...); +partition_t get_partition(unsigned int type, char *name); +void erase_nvram(int offset, int len); +int wipe_partition(partition_t partition, int header_only); +partition_t new_nvram_partition(int type, char *name, int len); +int increase_nvram_partition_size(partition_t partition, int newsize); +int clear_nvram_partition(partition_t part); +int delete_nvram_partition(partition_t part); +void reset_nvram(void); +void wipe_nvram(void); +void nvram_debug(void); + +/* envvar.c */ +char *get_env(partition_t part, char *envvar); +int add_env(partition_t part, char *envvar, char *value); +int del_env(partition_t part, char *envvar); +int set_env(partition_t part, char *envvar, char *value); + +#endif |