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mpc5121: determine RAM size using get_ram_size()

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Configure CONFIG_SYS_MAX_RAM_SIZE address range in
DDR Local Access Window and determine the RAM size.
Fix DDR LAW afterwards using detected RAM size.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
This commit is contained in:
Anatolij Gustschin 2010-04-24 19:27:08 +02:00 • committed by Wolfgang Denk
parent 5d937e8b59
commit b9947bbb08
4 changed files with 9 additions and 1 deletions
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7
arch/powerpc/cpu/mpc512x/fixed_sdram.c
View file

@ -78,7 +78,7 @@ long int fixed_sdram(ddr512x_config_t *mddrc_config,
u32 *dram_init_seq, int seq_sz) u32 *dram_init_seq, int seq_sz)
{ {
volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
u32 msize = CONFIG_SYS_DDR_SIZE * 1024 * 1024; u32 msize = CONFIG_SYS_MAX_RAM_SIZE;
u32 msize_log2 = __ilog2(msize); u32 msize_log2 = __ilog2(msize);
u32 i; u32 i;
@ -148,5 +148,10 @@ long int fixed_sdram(ddr512x_config_t *mddrc_config,
out_be32(&im->mddrc.ddr_time_config0, mddrc_config->ddr_time_config0); out_be32(&im->mddrc.ddr_time_config0, mddrc_config->ddr_time_config0);
out_be32(&im->mddrc.ddr_sys_config, mddrc_config->ddr_sys_config); out_be32(&im->mddrc.ddr_sys_config, mddrc_config->ddr_sys_config);
msize = get_ram_size(CONFIG_SYS_DDR_BASE, CONFIG_SYS_MAX_RAM_SIZE);
/* Fix DDR Local Window for new size */
out_be32(&im->sysconf.ddrlaw.ar, __ilog2(msize) - 1);
sync_law(&im->sysconf.ddrlaw.ar);
return msize; return msize;
} }

1
include/configs/aria.h
View file

@ -78,6 +78,7 @@
#define CONFIG_SYS_DDR_SIZE 256 /* MB */ #define CONFIG_SYS_DDR_SIZE 256 /* MB */
#define CONFIG_SYS_DDR_BASE 0x00000000 #define CONFIG_SYS_DDR_BASE 0x00000000
#define CONFIG_SYS_SDRAM_BASE CONFIG_SYS_DDR_BASE #define CONFIG_SYS_SDRAM_BASE CONFIG_SYS_DDR_BASE
#define CONFIG_SYS_MAX_RAM_SIZE 0x20000000
#define CONFIG_SYS_IOCTRL_MUX_DDR 0x00000036 #define CONFIG_SYS_IOCTRL_MUX_DDR 0x00000036

1
include/configs/mecp5123.h
View file

@ -66,6 +66,7 @@
#define CONFIG_SYS_DDR_BASE 0x00000000 /* DDR is sys memory*/ #define CONFIG_SYS_DDR_BASE 0x00000000 /* DDR is sys memory*/
#define CONFIG_SYS_SDRAM_BASE CONFIG_SYS_DDR_BASE #define CONFIG_SYS_SDRAM_BASE CONFIG_SYS_DDR_BASE
#define CONFIG_SYS_MAX_RAM_SIZE 0x20000000
#define CONFIG_SYS_IOCTRL_MUX_DDR 0x00000036 #define CONFIG_SYS_IOCTRL_MUX_DDR 0x00000036

1
include/configs/mpc5121ads.h
View file

@ -85,6 +85,7 @@
#endif #endif
#define CONFIG_SYS_DDR_BASE 0x00000000 /* DDR is system memory*/ #define CONFIG_SYS_DDR_BASE 0x00000000 /* DDR is system memory*/
#define CONFIG_SYS_SDRAM_BASE CONFIG_SYS_DDR_BASE #define CONFIG_SYS_SDRAM_BASE CONFIG_SYS_DDR_BASE
#define CONFIG_SYS_MAX_RAM_SIZE 0x20000000
#define CONFIG_SYS_IOCTRL_MUX_DDR 0x00000036 #define CONFIG_SYS_IOCTRL_MUX_DDR 0x00000036