New patch to review for coreboot: soc/imgtec/pistachio: add implementation for system reset

[Ionela Voinescu]

Ionela Voinescu ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/12755

-gerrit

commit 77c3c6e10c533baedd948b8fd00576a7ae6a88d8
Author: Ionela Voinescu 
Date:   Thu Dec 17 13:11:50 2015 +0000

soc/imgtec/pistachio: add implementation for system reset

Implement system reset by calling the watchdog soft reset.
    Following the soft reset, the SoC will reset to the same logic
    state and therefore have the same effect as a hard (power-on)
    reset except for:
     - watchdog scratch registers will be unaffected (hard reset
       will clear them)
     - the real time clock will be unaffected

BUG=none
    TEST=tested on Pistachio bring up board

Change-Id: I1332c2249c756f6d8574fc5c407de52f88e60f08
    Signed-off-by: Ionela Voinescu 
---
 src/soc/imgtec/pistachio/reset.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/soc/imgtec/pistachio/reset.c b/src/soc/imgtec/pistachio/reset.c
index 7bf4d03..fc581df 100644
--- a/src/soc/imgtec/pistachio/reset.c
+++ b/src/soc/imgtec/pistachio/reset.c
@@ -13,13 +13,15 @@
  * GNU General Public License for more details.
  */

+#include <arch/io.h>
 #include <console/console.h>
 #include <reset.h>

+#define PISTACHIO_WD_ADDR		0xB8102100
+#define PISTACHIO_WD_SW_RST_OFFSET	0x0000
+
 void hard_reset(void)
 {
-	printk(BIOS_EMERG, "reset failed!\n");
-	/* TBD */
-	for (;;)
-		;
+	/* Generate system reset */
+	write32(PISTACHIO_WD_ADDR + PISTACHIO_WD_SW_RST_OFFSET, 0x1);
 }