ARM: implement relocation for ARM926

Change the implementation for arm926 to relocate the code to
an arbitrary address in RAM.

Adapt the TX25 (i.MX25), magnesium board to test the changes.

On the tx25 board TEXT_BASE is set to the final relocation
address to prevent one more copying of u-boot code
when relocating. More info see:
doc/README.arm-relocation

da850 board:
Tested-by: Ben Gardiner <bengardiner@nanometrics.ca>

Portions of this work were supported by funding from
the CE Linux Forum.

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Ben Gardiner <bengardiner@nanometrics.ca>

5 files changed, 45 insertions, 11 deletions

diff --git a/board/karo/tx25/config.mk b/board/karo/tx25/config.mk
index 732a14a..51ca1ab 100644
--- a/board/karo/tx25/config.mk
+++ b/board/karo/tx25/config.mk
@@ -1,5 +1,5 @@
 ifdef CONFIG_NAND_SPL
-TEXT_BASE = 0x81ec0000
+TEXT_BASE = 0x810c0000
 else
-TEXT_BASE = 0x81f00000
+TEXT_BASE = 0x81fc0000
 endif
diff --git a/board/karo/tx25/tx25.c b/board/karo/tx25/tx25.c
index 2608698..dc57d5c 100644
--- a/board/karo/tx25/tx25.c
+++ b/board/karo/tx25/tx25.c
@@ -159,7 +159,14 @@ int board_late_init(void)
 
 int dram_init (void)
 {
+	/* dram_init must store complete ramsize in gd->ram_size */
+	gd->ram_size = get_ram_size((volatile void *)PHYS_SDRAM_1,
+				PHYS_SDRAM_1_SIZE);
+	return 0;
+}
 
+void dram_init_banksize(void)
+{
 	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
 	gd->bd->bi_dram[0].size = get_ram_size((volatile void *)PHYS_SDRAM_1,
 			PHYS_SDRAM_1_SIZE);
@@ -167,9 +174,9 @@ int dram_init (void)
 	gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
 	gd->bd->bi_dram[1].size = get_ram_size((volatile void *)PHYS_SDRAM_2,
 			PHYS_SDRAM_2_SIZE);
-#endif
+#else
 
-	return 0;
+#endif
 }
 
 int checkboard(void)
diff --git a/board/keymile/km_arm/km_arm.c b/board/keymile/km_arm/km_arm.c
index d7cbd7a..7c0b858 100644
--- a/board/keymile/km_arm/km_arm.c
+++ b/board/keymile/km_arm/km_arm.c
@@ -225,6 +225,7 @@ U_BOOT_CMD(
 	);
 #endif
 
+#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
 int dram_init(void)
 {
 	int i;
@@ -234,9 +235,32 @@ int dram_init(void)
 		gd->bd->bi_dram[i].size = get_ram_size((long *)kw_sdram_bar(i),
 						       kw_sdram_bs(i));
 	}
+
+	return 0;
+}
+#else
+int dram_init(void)
+{
+	/* dram_init must store complete ramsize in gd->ram_size */
+	/* Fix this */
+	gd->ram_size = get_ram_size((volatile void *)kw_sdram_bar(0),
+				kw_sdram_bs(0));
 	return 0;
 }
 
+void dram_init_banksize(void)
+{
+	int i;
+
+	for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+		gd->bd->bi_dram[i].start = kw_sdram_bar(i);
+		gd->bd->bi_dram[i].size = kw_sdram_bs(i);
+		gd->bd->bi_dram[i].size = get_ram_size((long *)kw_sdram_bar(i),
+						       kw_sdram_bs(i));
+	}
+}
+#endif
+
 /* Configure and enable MV88E1118 PHY */
 void reset_phy(void)
 {
diff --git a/board/logicpd/imx27lite/config.mk b/board/logicpd/imx27lite/config.mk
index a2e7768..2f9c4e6 100644
--- a/board/logicpd/imx27lite/config.mk
+++ b/board/logicpd/imx27lite/config.mk
@@ -1 +1 @@
-TEXT_BASE = 0xA7F00000
+TEXT_BASE = 0xc0000000
diff --git a/board/logicpd/imx27lite/imx27lite.c b/board/logicpd/imx27lite/imx27lite.c
index 4427415..6eb5cc2 100644
--- a/board/logicpd/imx27lite/imx27lite.c
+++ b/board/logicpd/imx27lite/imx27lite.c
@@ -66,19 +66,22 @@ int board_init (void)
 
 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,
+				PHYS_SDRAM_1_SIZE);
+	return 0;
+}
 
-#if CONFIG_NR_DRAM_BANKS > 0
-	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
-	gd->bd->bi_dram[0].size = get_ram_size((volatile void *)PHYS_SDRAM_1,
+void dram_init_banksize(void)
+{
+	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
+	gd->bd->bi_dram[0].size = get_ram_size((volatile void *)CONFIG_SYS_SDRAM_BASE,
 			PHYS_SDRAM_1_SIZE);
-#endif
 #if CONFIG_NR_DRAM_BANKS > 1
 	gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
 	gd->bd->bi_dram[1].size = get_ram_size((volatile void *)PHYS_SDRAM_2,
 			PHYS_SDRAM_2_SIZE);
 #endif
-
-	return 0;
 }
 
 int checkboard(void)