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| author | Paul Gortmaker <paul.gortmaker@windriver.com> | 2009-09-25 11:14:11 -0400 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2009-09-30 08:29:47 -0500 |
| commit | dd9ca98f2600000e5c2744735040100b770650e7 (patch) | |
| tree | 0eeacea3bc8b43a5025fbadeb808166a0c94962d /include | |
| parent | 8280912e0657e96a7b7d8da7003656d62b0fd109 (diff) | |
| download | u-boot-imx-dd9ca98f2600000e5c2744735040100b770650e7.zip u-boot-imx-dd9ca98f2600000e5c2744735040100b770650e7.tar.gz u-boot-imx-dd9ca98f2600000e5c2744735040100b770650e7.tar.bz2 | |
sbc8548: reclaim wasted sector in boot flash
By nature of being based off the MPC8548CDS board, this
board inherited an ENV_SIZE setting of 256k. But since
it has a smaller flash device (8MB soldered on), it has
a native sector size of 128k, and hence the ENV_SIZE was
causing 2 sectors to be used for the environment.
By removing the unused sector, we can push TEXT_BASE up
closer to the end of address space and reclaim that
sector for any other application. This also fixes the
mismatch between TEXT_BASE and MONITOR_LEN reported by
Kumar earlier.
Since this board also supports the ability to boot off
the 64MB SODIMM flash, this change is forward looking
with that in mind; i.e. the settings for MONITOR_LEN
and ENV_SIZE will work when the 512k sectors of the
SODIMM flash are used for alternate boot in the future.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/configs/sbc8548.h | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/include/configs/sbc8548.h b/include/configs/sbc8548.h index d10792a..aeac2de 100644 --- a/include/configs/sbc8548.h +++ b/include/configs/sbc8548.h @@ -330,7 +330,14 @@ #define CONFIG_SYS_GBL_DATA_OFFSET (CONFIG_SYS_INIT_RAM_END - CONFIG_SYS_GBL_DATA_SIZE) #define CONFIG_SYS_INIT_SP_OFFSET CONFIG_SYS_GBL_DATA_OFFSET -#define CONFIG_SYS_MONITOR_LEN (256 * 1024) /* Reserve 256 kB for Mon */ +/* + * For soldered on flash, (128kB/sector) we use 2 sectors for u-boot and + * one for env+bootpg (TEXT_BASE=0xfffa_0000, 384kB total). For SODIMM + * flash (512kB/sector) we use 1 sector for u-boot, and one for env+bootpg + * (TEXT_BASE=0xfff0_0000, 1MB total). This dynamically sets the right + * thing for MONITOR_LEN in both cases. + */ +#define CONFIG_SYS_MONITOR_LEN (~TEXT_BASE + 1) #define CONFIG_SYS_MALLOC_LEN (128 * 1024) /* Reserved for malloc */ /* Serial Port */ @@ -448,9 +455,16 @@ * Environment */ #define CONFIG_ENV_IS_IN_FLASH 1 -#define CONFIG_ENV_ADDR (CONFIG_SYS_MONITOR_BASE + 0x40000) -#define CONFIG_ENV_SECT_SIZE 0x40000 /* 256K(one sector) for env */ #define CONFIG_ENV_SIZE 0x2000 +#if TEXT_BASE == 0xfff00000 /* Boot from 64MB SODIMM */ +#define CONFIG_ENV_ADDR (CONFIG_SYS_MONITOR_BASE + 0x80000) +#define CONFIG_ENV_SECT_SIZE 0x80000 /* 512K(one sector) for env */ +#elif TEXT_BASE == 0xfffa0000 /* Boot from 8MB soldered flash */ +#define CONFIG_ENV_ADDR (CONFIG_SYS_MONITOR_BASE + 0x40000) +#define CONFIG_ENV_SECT_SIZE 0x20000 /* 128K(one sector) for env */ +#else +#warning undefined environment size/location. +#endif #define CONFIG_LOADS_ECHO 1 /* echo on for serial download */ #define CONFIG_SYS_LOADS_BAUD_CHANGE 1 /* allow baudrate change */ |