diff options
| author | Stefan Roese <sr@denx.de> | 2008-03-11 15:05:26 +0100 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2008-03-15 07:28:03 +0100 |
| commit | 8ac41e3e37c3080c6b1d9461d654161cfe2aa492 (patch) | |
| tree | 6faa792ed2c3a6f353dae20d465707d30f4c411f /cpu/ppc4xx/44x_spd_ddr2.c | |
| parent | 56e410178375d9f20be25fb24e180974f0ae120b (diff) | |
ppc4xx: Add basic support for AMCC 460EX/460GT (1/5)
This patch adds basic support for the AMCC 460EX/460GT PPC's.
Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'cpu/ppc4xx/44x_spd_ddr2.c')
| -rw-r--r-- | cpu/ppc4xx/44x_spd_ddr2.c | 41 |
1 files changed, 37 insertions, 4 deletions
diff --git a/cpu/ppc4xx/44x_spd_ddr2.c b/cpu/ppc4xx/44x_spd_ddr2.c index 3bafea3a9..9e722b998 100644 --- a/cpu/ppc4xx/44x_spd_ddr2.c +++ b/cpu/ppc4xx/44x_spd_ddr2.c @@ -42,7 +42,8 @@ #include <asm/mmu.h> #if defined(CONFIG_SPD_EEPROM) && \ - (defined(CONFIG_440SP) || defined(CONFIG_440SPE)) + (defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \ + defined(CONFIG_460EX) || defined(CONFIG_460GT)) /*-----------------------------------------------------------------------------+ * Defines @@ -579,6 +580,13 @@ long int initdram(int board_type) ppc440sp_sdram_register_dump(); + /* + * Clear potential errors resulting from auto-calibration. + * If not done, then we could get an interrupt later on when + * exceptions are enabled. + */ + set_mcsr(get_mcsr()); + return dram_size; } @@ -2125,6 +2133,7 @@ static void program_memory_queue(unsigned long *dimm_populated, unsigned long baseadd_size; unsigned long i; unsigned long bank_0_populated = 0; + unsigned long total_size = 0; /*------------------------------------------------------------------ * Reset the rank_base_address. @@ -2147,28 +2156,38 @@ static void program_memory_queue(unsigned long *dimm_populated, * Set the sizes *-----------------------------------------------------------------*/ baseadd_size = 0; - rank_size_bytes = 4 * 1024 * 1024 * rank_size_id; switch (rank_size_id) { + case 0x01: + baseadd_size |= SDRAM_RXBAS_SDSZ_1024; + total_size = 1024; + break; case 0x02: - baseadd_size |= SDRAM_RXBAS_SDSZ_8; + baseadd_size |= SDRAM_RXBAS_SDSZ_2048; + total_size = 2048; break; case 0x04: - baseadd_size |= SDRAM_RXBAS_SDSZ_16; + baseadd_size |= SDRAM_RXBAS_SDSZ_4096; + total_size = 4096; break; case 0x08: baseadd_size |= SDRAM_RXBAS_SDSZ_32; + total_size = 32; break; case 0x10: baseadd_size |= SDRAM_RXBAS_SDSZ_64; + total_size = 64; break; case 0x20: baseadd_size |= SDRAM_RXBAS_SDSZ_128; + total_size = 128; break; case 0x40: baseadd_size |= SDRAM_RXBAS_SDSZ_256; + total_size = 256; break; case 0x80: baseadd_size |= SDRAM_RXBAS_SDSZ_512; + total_size = 512; break; default: printf("DDR-SDRAM: DIMM %d memory queue configuration.\n", @@ -2178,6 +2197,7 @@ static void program_memory_queue(unsigned long *dimm_populated, printf("Replace the DIMM module with a supported DIMM.\n\n"); spd_ddr_init_hang (); } + rank_size_bytes = total_size << 20; if ((dimm_populated[dimm_num] != SDRAM_NONE) && (dimm_num == 1)) bank_0_populated = 1; @@ -2190,6 +2210,19 @@ static void program_memory_queue(unsigned long *dimm_populated, } } } + +#if defined(CONFIG_460EX) || defined(CONFIG_460GT) + /* + * Enable high bandwidth access on 460EX/GT. + * This should/could probably be done on other + * PPC's too, like 440SPe. + * 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 */ +#endif } /*-----------------------------------------------------------------------------+ |