arm: Tegra2: Fix ELDK42 gcc failure with inline asm stack pointer load
The 4.2.2 gcc in the ELDK42 release doesn't like the direct SP
load using a constant in tegra2_start. Change it to use a load
thru another reg using mov sp, %0 : : "r"(CONST).
Tested on my Seaboard T20-A03, U-Boot loads and runs OK. Also
compiled all tegra2 builds with both gcc 4.2.2 and 4.4.1 OK.
Signed-off-by: Tom Warren <twarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/cpu/armv7/tegra2/ap20.c b/arch/arm/cpu/armv7/tegra2/ap20.c
index 4c44bb3..f0450f4 100644
--- a/arch/arm/cpu/armv7/tegra2/ap20.c
+++ b/arch/arm/cpu/armv7/tegra2/ap20.c
@@ -298,11 +298,11 @@
writel(0xC0, &pmt->pmt_cfg_ctl);
/*
- * If we are ARM7 - give it a different stack. We are about to
- * start up the A9 which will want to use this one.
- */
- asm volatile("ldr sp, =%c0\n"
- : : "i"(AVP_EARLY_BOOT_STACK_LIMIT));
+ * If we are ARM7 - give it a different stack. We are about to
+ * start up the A9 which will want to use this one.
+ */
+ asm volatile("mov sp, %0\n"
+ : : "r"(AVP_EARLY_BOOT_STACK_LIMIT));
start_cpu((u32)_start);
halt_avp();