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| author | Mingkai Hu <Mingkai.hu@freescale.com> | 2011-01-24 17:09:55 +0000 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-04-04 22:26:16 -0500 |
| commit | 97039ab98c551c7860bc0977d684ef686159e0d7 (patch) | |
| tree | 5bf4b5dc664a69e5aff47155078e7b3ba1596c59 /common/env_mmc.c | |
| parent | c2a63f48fb6cc5e242133dacb5a9bcb8c29db53e (diff) | |
| download | u-boot-imx-97039ab98c551c7860bc0977d684ef686159e0d7.zip u-boot-imx-97039ab98c551c7860bc0977d684ef686159e0d7.tar.gz u-boot-imx-97039ab98c551c7860bc0977d684ef686159e0d7.tar.bz2 | |
env_mmc: Allow board code to override the environment address
On some boards the environment may not be located at a fixed address in
the MMC/SDHC card. This allows those boards to implement their own
means to report what address the environment is located at.
Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
Signed-off-by: Zhao Chenhui <b35336@freescale.com>
Acked-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'common/env_mmc.c')
| -rw-r--r-- | common/env_mmc.c | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/common/env_mmc.c b/common/env_mmc.c index 71dcc4c..83f40f4 100644 --- a/common/env_mmc.c +++ b/common/env_mmc.c @@ -1,5 +1,5 @@ /* - * (C) Copyright 2008-2010 Freescale Semiconductor, Inc. + * (C) Copyright 2008-2011 Freescale Semiconductor, Inc. * * See file CREDITS for list of people who contributed to this * project. @@ -51,6 +51,19 @@ static void use_default(void); DECLARE_GLOBAL_DATA_PTR; +#if !defined(CONFIG_ENV_OFFSET) +#define CONFIG_ENV_OFFSET 0 +#endif + +static int __mmc_get_env_addr(struct mmc *mmc, u32 *env_addr) +{ + *env_addr = CONFIG_ENV_OFFSET; + return 0; +} +__attribute__((weak, alias("__mmc_get_env_addr"))) +int mmc_get_env_addr(struct mmc *mmc, u32 *env_addr); + + uchar env_get_char_spec(int index) { return *((uchar *)(gd->env_addr + index)); @@ -102,10 +115,14 @@ int saveenv(void) ssize_t len; char *res; struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV); + u32 offset; if (init_mmc_for_env(mmc)) return 1; + if(mmc_get_env_addr(mmc, &offset)) + return 1; + res = (char *)&env_new.data; len = hexport_r(&env_htab, '\0', &res, ENV_SIZE); if (len < 0) { @@ -114,7 +131,7 @@ int saveenv(void) } env_new.crc = crc32(0, env_new.data, ENV_SIZE); printf("Writing to MMC(%d)... ", CONFIG_SYS_MMC_ENV_DEV); - if (write_env(mmc, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, (u_char *)&env_new)) { + if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)&env_new)) { puts("failed\n"); return 1; } @@ -141,16 +158,22 @@ inline int read_env(struct mmc *mmc, unsigned long size, void env_relocate_spec(void) { #if !defined(ENV_IS_EMBEDDED) - char buf[CONFIG_ENV_SIZE]; + char buf[CONFIG_ENV_SIZE]; struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV); + u32 offset; if (init_mmc_for_env(mmc)) { use_default(); return; } - if (read_env(mmc, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, buf)) { + if(mmc_get_env_addr(mmc, &offset)) { + use_default(); + return ; + } + + if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) { use_default(); return; } |