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| author | Guennadi Liakhovetski <lg@denx.de> | 2009-05-18 16:07:22 +0200 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2009-07-07 17:58:07 -0500 |
| commit | b74ab737369bbbe66c15cbe6c0d0b6a351b00c96 (patch) | |
| tree | db8ac354c673912879ea5632114b18f17a2d53cc /common/env_nand.c | |
| parent | 378adfcdf4bbd77ee4cbc3276d4733e218308a21 (diff) | |
| download | u-boot-imx-b74ab737369bbbe66c15cbe6c0d0b6a351b00c96.zip u-boot-imx-b74ab737369bbbe66c15cbe6c0d0b6a351b00c96.tar.gz u-boot-imx-b74ab737369bbbe66c15cbe6c0d0b6a351b00c96.tar.bz2 | |
nand_spl: read environment early, when booting from NAND using nand_spl
Currently, when booting from NAND using nand_spl, in the beginning the default
environment is used until later in boot process the dynamic environment is read
out. This way environment variables that must be interpreted early, like the
baudrate or "silent", cannot be modified dynamically and remain at their
default values. Fix this problem by reading out main and redundand (if used)
copies of the environment in the nand_spl code.
Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'common/env_nand.c')
| -rw-r--r-- | common/env_nand.c | 43 |
1 files changed, 30 insertions, 13 deletions
diff --git a/common/env_nand.c b/common/env_nand.c index 21bce25..90a1c45 100644 --- a/common/env_nand.c +++ b/common/env_nand.c @@ -68,9 +68,11 @@ extern int default_environment_size; char * env_name_spec = "NAND"; -#ifdef ENV_IS_EMBEDDED +#if defined(ENV_IS_EMBEDDED) extern uchar environment[]; env_t *env_ptr = (env_t *)(&environment[0]); +#elif defined(CONFIG_NAND_ENV_DST) +env_t *env_ptr = (env_t *)CONFIG_NAND_ENV_DST; #else /* ! ENV_IS_EMBEDDED */ env_t *env_ptr = 0; #endif /* ENV_IS_EMBEDDED */ @@ -102,23 +104,33 @@ uchar env_get_char_spec (int index) */ int env_init(void) { -#if defined(ENV_IS_EMBEDDED) +#if defined(ENV_IS_EMBEDDED) || defined(CONFIG_NAND_ENV_DST) int crc1_ok = 0, crc2_ok = 0; - env_t *tmp_env1, *tmp_env2; + env_t *tmp_env1; + +#ifdef CONFIG_ENV_OFFSET_REDUND + env_t *tmp_env2; - tmp_env1 = env_ptr; tmp_env2 = (env_t *)((ulong)env_ptr + CONFIG_ENV_SIZE); + crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc); +#endif + + tmp_env1 = env_ptr; crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc); - crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc); - if (!crc1_ok && !crc2_ok) + if (!crc1_ok && !crc2_ok) { + gd->env_addr = 0; gd->env_valid = 0; - else if(crc1_ok && !crc2_ok) + + return 0; + } else if (crc1_ok && !crc2_ok) { gd->env_valid = 1; - else if(!crc1_ok && crc2_ok) + } +#ifdef CONFIG_ENV_OFFSET_REDUND + else if (!crc1_ok && crc2_ok) { gd->env_valid = 2; - else { + } else { /* both ok - check serial */ if(tmp_env1->flags == 255 && tmp_env2->flags == 0) gd->env_valid = 2; @@ -132,14 +144,19 @@ int env_init(void) gd->env_valid = 1; } + if (gd->env_valid == 2) + env_ptr = tmp_env2; + else +#endif if (gd->env_valid == 1) env_ptr = tmp_env1; - else if (gd->env_valid == 2) - env_ptr = tmp_env2; -#else /* ENV_IS_EMBEDDED */ + + gd->env_addr = (ulong)env_ptr->data; + +#else /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */ gd->env_addr = (ulong)&default_environment[0]; gd->env_valid = 1; -#endif /* ENV_IS_EMBEDDED */ +#endif /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */ return (0); } |