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authorLarry Johnson <lrj@acm.org>2008-03-30 20:33:04 -0500
committerStefan Roese <sr@denx.de>2008-03-31 12:20:59 +0200
commiteb14ebe813a0cb5d47905228da446a5ad692473b (patch)
tree7d152b2f6338f2d411688dc581fa057f67c4bf7c /cpu
parent02e3892021112f21067d9ed1d04ae4182725ba52 (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.c27
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) */