diff options
Diffstat (limited to 'cpu/ppc4xx/44x_spd_ddr2.c')
| -rw-r--r-- | cpu/ppc4xx/44x_spd_ddr2.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/cpu/ppc4xx/44x_spd_ddr2.c b/cpu/ppc4xx/44x_spd_ddr2.c index 1c36324..c7ed161 100644 --- a/cpu/ppc4xx/44x_spd_ddr2.c +++ b/cpu/ppc4xx/44x_spd_ddr2.c @@ -2172,6 +2172,11 @@ static void program_memory_queue(unsigned long *dimm_populated, unsigned long i; unsigned long bank_0_populated = 0; phys_size_t total_size = 0; +#if defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \ + defined(CONFIG_460EX) || defined(CONFIG_460GT) || \ + defined(CONFIG_460SX) + unsigned long val; +#endif /*------------------------------------------------------------------ * Reset the rank_base_address. @@ -2249,17 +2254,31 @@ static void program_memory_queue(unsigned long *dimm_populated, } } -#if defined(CONFIG_460EX) || defined(CONFIG_460GT) +#if defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \ + defined(CONFIG_460EX) || defined(CONFIG_460GT) || \ + defined(CONFIG_460SX) + /* - * Enable high bandwidth access on 460EX/GT. - * This should/could probably be done on other - * PPC's too, like 440SPe. + * Enable high bandwidth access * This is currently not used, but with this setup * it is possible to use it later on in e.g. the Linux * EMAC driver for performance gain. */ mtdcr(SDRAM_PLBADDULL, 0x00000000); /* MQ0_BAUL */ mtdcr(SDRAM_PLBADDUHB, 0x00000008); /* MQ0_BAUH */ + + /* + * Set optimal value for Memory Queue HB/LL Configuration registers + */ + + val = (mfdcr(SDRAM_CONF1HB) | SDRAM_CONF1HB_AAFR | SDRAM_CONF1HB_RPEN | SDRAM_CONF1HB_RFTE); + mtdcr(SDRAM_CONF1HB, val); + + val = (mfdcr(SDRAM_CONF1LL) | SDRAM_CONF1LL_AAFR | SDRAM_CONF1LL_RPEN | SDRAM_CONF1LL_RFTE); + mtdcr(SDRAM_CONF1LL, val); + + val = (mfdcr(SDRAM_CONFPATHB) | SDRAM_CONFPATHB_TPEN); + mtdcr(SDRAM_CONFPATHB, val); #endif } |