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>
diff --git a/arch/arm/cpu/arm926ejs/orion5x/dram.c b/arch/arm/cpu/arm926ejs/orion5x/dram.c
index c719798..c5c8ab7 100644
--- a/arch/arm/cpu/arm926ejs/orion5x/dram.c
+++ b/arch/arm/cpu/arm926ejs/orion5x/dram.c
@@ -49,7 +49,7 @@
result = winregs[bank].base;
return result;
}
-
+#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
int dram_init(void)
{
int i;
@@ -62,3 +62,25 @@
}
return 0;
}
+#else
+int dram_init (void)
+{
+ /* dram_init must store complete ramsize in gd->ram_size */
+ gd->ram_size = get_ram_size(
+ (volatile long *) orion5x_sdram_bar(0),
+ CONFIG_MAX_RAM_BANK_SIZE);
+ return 0;
+}
+
+void dram_init_banksize (void)
+{
+ int i;
+
+ for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+ gd->bd->bi_dram[i].start = orion5x_sdram_bar(i);
+ gd->bd->bi_dram[i].size = get_ram_size(
+ (volatile long *) (gd->bd->bi_dram[i].start),
+ CONFIG_MAX_RAM_BANK_SIZE);
+ }
+}
+#endif