diff options
| author | Larry Johnson <lrj@acm.org> | 2008-03-30 20:33:04 -0500 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2008-03-31 12:20:59 +0200 |
| commit | eb14ebe813a0cb5d47905228da446a5ad692473b (patch) | |
| tree | 7d152b2f6338f2d411688dc581fa057f67c4bf7c /cpu | |
| parent | 02e3892021112f21067d9ed1d04ae4182725ba52 (diff) | |
ppc4xx: Add CFG_MEM_TOP_HIDE to Denali SPD-based SDRAM setup
Signed-off-by: Larry Johnson <lrj@acm.org>
Diffstat (limited to 'cpu')
| -rw-r--r-- | cpu/ppc4xx/denali_spd_ddr2.c | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/cpu/ppc4xx/denali_spd_ddr2.c b/cpu/ppc4xx/denali_spd_ddr2.c index 60f89c97fc8..e20c9ebf879 100644 --- a/cpu/ppc4xx/denali_spd_ddr2.c +++ b/cpu/ppc4xx/denali_spd_ddr2.c @@ -1093,10 +1093,10 @@ long int initdram(int board_type) program_ddr0_06(dimm_ranks, iic0_dimm_addr, num_dimm_banks, sdram_freq); - /*------------------------------------------------------------------ + /* * TODO: tFAW not found in SPD. Value of 13 taken from Sequoia - * board SDRAM, but may be overly concervate. - *-----------------------------------------------------------------*/ + * board SDRAM, but may be overly conservative. + */ mtsdram(DDR0_07, DDR0_07_NO_CMD_INIT_ENCODE(0) | DDR0_07_TFAW_ENCODE(13) | DDR0_07_AUTO_REFRESH_MODE_ENCODE(1) | @@ -1181,26 +1181,29 @@ long int initdram(int board_type) denali_wait_for_dlllock(); #if defined(CONFIG_DDR_DATA_EYE) - /* -----------------------------------------------------------+ - * Perform data eye search if requested. - * ----------------------------------------------------------*/ - program_tlb(0, CFG_SDRAM_BASE, dram_size, TLB_WORD2_I_ENABLE); + /* + * Map the first 1 MiB of memory in the TLB, and perform the data eye + * search. + */ + program_tlb(0, CFG_SDRAM_BASE, TLB_1MB_SIZE, TLB_WORD2_I_ENABLE); denali_core_search_data_eye(); denali_sdram_register_dump(); - remove_tlb(CFG_SDRAM_BASE, dram_size); + remove_tlb(CFG_SDRAM_BASE, TLB_1MB_SIZE); #endif #if defined(CONFIG_ZERO_SDRAM) || defined(CONFIG_DDR_ECC) program_tlb(0, CFG_SDRAM_BASE, dram_size, 0); sync(); - eieio(); /* Zero the memory */ debug("Zeroing SDRAM..."); - dcbz_area(CFG_SDRAM_BASE, dram_size); +#if defined(CFG_MEM_TOP_HIDE) + dcbz_area(CFG_SDRAM_BASE, dram_size - CFG_MEM_TOP_HIDE); +#else +#error Please define CFG_MEM_TOP_HIDE (see README) in your board config file +#endif dflush(); debug("Completed\n"); sync(); - eieio(); remove_tlb(CFG_SDRAM_BASE, dram_size); #if defined(CONFIG_DDR_ECC) @@ -1211,7 +1214,6 @@ long int initdram(int board_type) u32 val; sync(); - eieio(); /* Clear error status */ mfsdram(DDR0_00, val); mtsdram(DDR0_00, val | DDR0_00_INT_ACK_ALL); @@ -1229,7 +1231,6 @@ long int initdram(int board_type) print_mcsr(); #endif sync(); - eieio(); } #endif /* defined(CONFIG_DDR_ECC) */ #endif /* defined(CONFIG_ZERO_SDRAM) || defined(CONFIG_DDR_ECC) */ |