[U-Boot] [PATCH] [TESTING] da8xx: fixup ARM relocation support

[Ben Gardiner]

Split the existing dram_init for da8xx when ARM reloc is enabled, like the
changes to arch/arm/cpu/arm926ejs/orion5x/dram.c in
0f234d263b17ccf1b8fd776eb8c15b7cdb27a887 by Heiko Schocher <hs at denx.de>.

Without these changes gd->ram_size is '0' which leads to incorrect relocation
when CONFIG_SYS_ARM_WITHOUT_RELOC is defined and the board does not boot.

We use get_ram_size to dynamically calculate the available RAM because it runs
on different board version with different ram, as suggested by Heiko in private
communication.

Tested on a da850evm with 128M of DDR2 installed; with both
CONFIG_SYS_ARM_WITHOUT_RELOC defined and undefined.

Signed-off-by: Ben Gardiner <bengardiner at nanometrics.ca>
---
 board/davinci/common/misc.c |   17 +++++++++++++++++
 include/configs/da850evm.h  |    1 +
 2 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/board/davinci/common/misc.c b/board/davinci/common/misc.c
index 25ca326..e8acefe 100644
--- a/board/davinci/common/misc.c
+++ b/board/davinci/common/misc.c
@@ -33,6 +33,7 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
 int dram_init(void)
 {
 	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
@@ -40,6 +41,22 @@ int dram_init(void)
 
 	return(0);
 }
+#else
+int dram_init(void)
+{
+	/* dram_init must store complete ramsize in gd->ram_size */
+	gd->ram_size = get_ram_size(
+			(volatile void *)CONFIG_SYS_SDRAM_BASE,
+			CONFIG_MAX_RAM_BANK_SIZE);
+	return(0);
+}
+
+void dram_init_banksize (void)
+{
+	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
+	gd->bd->bi_dram[0].size = gd->ram_size;
+}
+#endif
 
 #ifdef CONFIG_DRIVER_TI_EMAC
 
diff --git a/include/configs/da850evm.h b/include/configs/da850evm.h
index 016a21e..c929f6b 100644
--- a/include/configs/da850evm.h
+++ b/include/configs/da850evm.h
@@ -47,6 +47,7 @@
 #define CONFIG_SYS_GBL_DATA_SIZE	128 /* reserved for initial data */
 #define PHYS_SDRAM_1		DAVINCI_DDR_EMIF_DATA_BASE /* DDR Start */
 #define PHYS_SDRAM_1_SIZE	(64 << 20) /* SDRAM size 64MB */
+#define CONFIG_MAX_RAM_BANK_SIZE (512 << 20) /*DDR2 Data region maximum size from SPRS586*/
 
 /* memtest start addr */
 #define CONFIG_SYS_MEMTEST_START	(PHYS_SDRAM_1 + 0x2000000)
-- 
1.7.0.4