David Hendricks (dhendrix@chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2350
-gerrit
commit 9f4c56689b01efcedf91a86acf7eb194fb7b6fc9 Author: David Hendricks dhendrix@chromium.org Date: Sun Feb 10 15:59:22 2013 -0800
snow: switch to stack in DRAM once in ramstage
This patch gives us some stack space in RAM and sets our stack pointer to once we begin ramstage.
Note: We may not need this patch after all since we should have plenty of stack space in SRAM. It might be simpler (and perhaps faster) to keep the stack in SRAM.
(credit to Gabe for this one, I'm just putting it up on gerrit)
Change-Id: I2e447d6359d52e4615e1cd7811e6f167e3dc314b Signed-off-by: David Hendricks dhendrix@chromium.org Signed-off-by: Gabe Black gabeblack@chromium.org --- src/arch/armv7/Kconfig | 4 ++++ src/mainboard/google/snow/ramstage.c | 13 ++++++++++++- 2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/src/arch/armv7/Kconfig b/src/arch/armv7/Kconfig index 488ca97..fe36d79 100644 --- a/src/arch/armv7/Kconfig +++ b/src/arch/armv7/Kconfig @@ -49,4 +49,8 @@ config ARM_DCACHE_POLICY_WRITETHROUGH bool default n
+config STACK_SIZE + hex + default 0x1000 + endmenu diff --git a/src/mainboard/google/snow/ramstage.c b/src/mainboard/google/snow/ramstage.c index d280dbe..2045c5f 100644 --- a/src/mainboard/google/snow/ramstage.c +++ b/src/mainboard/google/snow/ramstage.c @@ -17,6 +17,7 @@ * MA 02111-1307 USA */
+#include <lib.h> #include <console/console.h>
#if CONFIG_WRITE_HIGH_TABLES @@ -24,7 +25,7 @@ #endif
void hardwaremain(int boot_complete); -void main(void) +static void real_main(void) { console_init(); printk(BIOS_INFO, "hello from ramstage\n"); @@ -37,3 +38,13 @@ void main(void)
hardwaremain(0); } + +void main(void) +{ + __asm__ __volatile__( + "mov sp, %0\n\r" + "mov pc, %1\n\r" + : + :"r"(_estack), "r"(&real_main) + ); +}