Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / arch / powerpc / platforms / cell / spu_base.c

diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index 8547e86bfb42ff2650c50dea4bdb3533e647a1b6..acfaccea5f4fa4d08f36bab9efe60d24a366f554 100644 (file)
--- 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;