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authorStefan Roese <sr@denx.de>2008-06-02 17:13:55 +0200
committerStefan Roese <sr@denx.de>2008-06-03 20:22:03 +0200
commitec724f883ee3f3925e6c55027e8ffa70ada83303 (patch)
treefe01db2e9f65d2743d237714fae0526bd45bfc45 /cpu/ppc4xx/44x_spd_ddr2.c
parent17ceb069b85fbb9269c4dc09b2c237f88334c5ba (diff)
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ppc4xx: Change Kilauea to use the common DDR2 init function
This patch changes the kilauea and kilauea_nand (for NAND booting) board port to not use a board specific DDR2 init routine anymore. Now the common code from cpu/ppc4xx is used. Thanks to Grant Erickson for all his basic work on this 405EX early bootup. 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.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/cpu/ppc4xx/44x_spd_ddr2.c b/cpu/ppc4xx/44x_spd_ddr2.c
index aa4a530..5214918 100644
--- a/cpu/ppc4xx/44x_spd_ddr2.c
+++ b/cpu/ppc4xx/44x_spd_ddr2.c
@@ -3083,6 +3083,16 @@ static void ppc440sp_sdram_register_dump(void)
*---------------------------------------------------------------------------*/
long initdram(int board_type)
{
+ /*
+ * Only run this SDRAM init code once. For NAND booting
+ * targets like Kilauea, we call initdram() early from the
+ * 4k NAND booting image (CONFIG_NAND_SPL) from nand_boot().
+ * Later on the NAND U-Boot image runs (CONFIG_NAND_U_BOOT)
+ * which calls initdram() again. This time the controller
+ * mustn't be reconfigured again since we're already running
+ * from SDRAM.
+ */
+#if !defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL)
unsigned long val;
/* Set Memory Bank Configuration Registers */
@@ -3178,6 +3188,7 @@ long initdram(int board_type)
#if defined(CONFIG_DDR_ECC)
ecc_init(CFG_SDRAM_BASE, CFG_MBYTES_SDRAM << 20);
#endif /* defined(CONFIG_DDR_ECC) */
+#endif /* !defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL) */
return (CFG_MBYTES_SDRAM << 20);
}