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arm: Tegra2: Fix ELDK42 gcc failure with inline asm stack pointer load

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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>
This commit is contained in:
Tom Warren 2012-02-17 06:01:21 +00:00 committed by Albert ARIBAUD
parent 5c1ad3e6f8
commit d8bd820935
1 changed files with 5 additions and 5 deletions
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10
arch/arm/cpu/armv7/tegra2/ap20.c
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@ -298,11 +298,11 @@ void tegra2_start(void)
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();