1 files changed, 70 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index 8547e86bfb4..acfaccea5f4 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -37,6 +37,7 @@
 #include <asm/spu_csa.h>
 #include <asm/xmon.h>
 #include <asm/prom.h>
+#include <asm/kexec.h>
 
 const struct spu_management_ops *spu_management_ops;
 EXPORT_SYMBOL_GPL(spu_management_ops);
@@ -727,6 +728,75 @@ static ssize_t spu_stat_show(struct sys_device *sysdev,
 
 static SYSDEV_ATTR(stat, 0644, spu_stat_show, NULL);
 
+#ifdef CONFIG_KEXEC
+
+struct crash_spu_info {
+        struct spu *spu;
+        u32 saved_spu_runcntl_RW;
+        u32 saved_spu_status_R;
+        u32 saved_spu_npc_RW;
+        u64 saved_mfc_sr1_RW;
+        u64 saved_mfc_dar;
+        u64 saved_mfc_dsisr;
+};
+
+#define CRASH_NUM_SPUS  16      /* Enough for current hardware */
+static struct crash_spu_info crash_spu_info[CRASH_NUM_SPUS];
+
+static void crash_kexec_stop_spus(void)
+{
+        struct spu *spu;
+        int i;
+        u64 tmp;
+
+        for (i = 0; i < CRASH_NUM_SPUS; i++) {
+                if (!crash_spu_info[i].spu)
+                        continue;
+
+                spu = crash_spu_info[i].spu;
+
+                crash_spu_info[i].saved_spu_runcntl_RW =
+                        in_be32(&spu->problem->spu_runcntl_RW);
+                crash_spu_info[i].saved_spu_status_R =
+                        in_be32(&spu->problem->spu_status_R);
+                crash_spu_info[i].saved_spu_npc_RW =
+                        in_be32(&spu->problem->spu_npc_RW);
+
+                crash_spu_info[i].saved_mfc_dar    = spu_mfc_dar_get(spu);
+                crash_spu_info[i].saved_mfc_dsisr  = spu_mfc_dsisr_get(spu);
+                tmp = spu_mfc_sr1_get(spu);
+                crash_spu_info[i].saved_mfc_sr1_RW = tmp;
+
+                tmp &= ~MFC_STATE1_MASTER_RUN_CONTROL_MASK;
+                spu_mfc_sr1_set(spu, tmp);
+
+                __delay(200);
+        }
+}
+
+static void crash_register_spus(struct list_head *list)
+{
+        struct spu *spu;
+        int ret;
+
+        list_for_each_entry(spu, list, full_list) {
+                if (WARN_ON(spu->number >= CRASH_NUM_SPUS))
+                        continue;
+
+                crash_spu_info[spu->number].spu = spu;
+        }
+
+        ret = crash_shutdown_register(&crash_kexec_stop_spus);
+        if (ret)
+                printk(KERN_ERR "Could not register SPU crash handler");
+}
+
+#else
+static inline void crash_register_spus(struct list_head *list)
+{
+}
+#endif
+
 static int __init init_spu_base(void)
 {
         int i, ret = 0;