microblaze: Add SPL support
Add support for U-BOOT SPL. NOR and RAM mode are supported.
There are 3 images in NOR flash. u-boot.img, dtb and kernel.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/microblaze/cpu/start.S b/arch/microblaze/cpu/start.S
index 8928024..1757bbf 100644
--- a/arch/microblaze/cpu/start.S
+++ b/arch/microblaze/cpu/start.S
@@ -22,6 +22,11 @@
*/
mts rmsr, r0 /* disable cache */
+
+#if defined(CONFIG_SPL_BUILD)
+ addi r1, r0, CONFIG_SPL_STACK_ADDR
+ addi r1, r1, -4 /* Decrement SP to top of memory */
+#else
addi r1, r0, CONFIG_SYS_INIT_SP_OFFSET
addi r1, r1, -4 /* Decrement SP to top of memory */
@@ -115,6 +120,7 @@
sh r7, r0, r8
rsubi r8, r10, 0x26
sh r6, r0, r8
+#endif /* BUILD_SPL */
/* Flush cache before enable cache */
addik r5, r0, 0
@@ -139,9 +145,14 @@
cmp r6, r5, r4 /* check if we have reach the end */
bnei r6, 2b
3: /* jumping to board_init */
+#ifndef CONFIG_SPL_BUILD
brai board_init_f
+#else
+ brai board_init_r
+#endif
1: bri 1b
+#ifndef CONFIG_SPL_BUILD
/*
* Read 16bit little endian
*/
@@ -174,3 +185,4 @@
rtsd r15, 8
or r0, r0, r0
.end out16
+#endif