[POWERPC] cell: add RAS support
[linux-2.6.git] / arch / powerpc / platforms / cell / pervasive.c
index 7eed8c6..695ac4e 100644 (file)
 #include <asm/reg.h>
 
 #include "pervasive.h"
+#include "cbe_regs.h"
 
 static DEFINE_SPINLOCK(cbe_pervasive_lock);
-struct cbe_pervasive {
-       struct pmd_regs __iomem *regs;
-       unsigned int thread;
-};
-
-/* can't use per_cpu from setup_arch */
-static struct cbe_pervasive cbe_pervasive[NR_CPUS];
 
 static void __init cbe_enable_pause_zero(void)
 {
        unsigned long thread_switch_control;
        unsigned long temp_register;
-       struct cbe_pervasive *p;
-       int thread;
+       struct cbe_pmd_regs __iomem *pregs;
 
        spin_lock_irq(&cbe_pervasive_lock);
-       p = &cbe_pervasive[smp_processor_id()];
-
-       if (!cbe_pervasive->regs)
+       pregs = cbe_get_cpu_pmd_regs(smp_processor_id());
+       if (pregs == NULL)
                goto out;
 
        pr_debug("Power Management: CPU %d\n", smp_processor_id());
 
         /* Enable Pause(0) control bit */
-       temp_register = in_be64(&p->regs->pm_control);
+       temp_register = in_be64(&pregs->pm_control);
 
-       out_be64(&p->regs->pm_control,
-                temp_register|PMD_PAUSE_ZERO_CONTROL);
+       out_be64(&pregs->pm_control,
+                temp_register | CBE_PMD_PAUSE_ZERO_CONTROL);
 
        /* Enable DEC and EE interrupt request */
        thread_switch_control  = mfspr(SPRN_TSC_CELL);
@@ -75,25 +67,16 @@ static void __init cbe_enable_pause_zero(void)
        switch ((mfspr(SPRN_CTRLF) & CTRL_CT)) {
        case CTRL_CT0:
                thread_switch_control |= TSC_CELL_DEC_ENABLE_0;
-               thread = 0;
                break;
        case CTRL_CT1:
                thread_switch_control |= TSC_CELL_DEC_ENABLE_1;
-               thread = 1;
                break;
        default:
                printk(KERN_WARNING "%s: unknown configuration\n",
                        __FUNCTION__);
-               thread = -1;
                break;
        }
 
-       if (p->thread != thread)
-               printk(KERN_WARNING "%s: device tree inconsistant, "
-                                    "cpu %i: %d/%d\n", __FUNCTION__,
-                                    smp_processor_id(),
-                                    p->thread, thread);
-
        mtspr(SPRN_TSC_CELL, thread_switch_control);
 
 out:
@@ -104,6 +87,11 @@ static void cbe_idle(void)
 {
        unsigned long ctrl;
 
+       /* Why do we do that on every idle ? Couldn't that be done once for
+        * all or do we lose the state some way ? Also, the pm_control
+        * register setting, that can't be set once at boot ? We really want
+        * to move that away in order to implement a simple powersave
+        */
        cbe_enable_pause_zero();
 
        while (1) {
@@ -152,8 +140,15 @@ static int cbe_system_reset_exception(struct pt_regs *regs)
                timer_interrupt(regs);
                break;
        case SRR1_WAKEMT:
-               /* no action required */
                break;
+#ifdef CONFIG_CBE_RAS
+       case SRR1_WAKESYSERR:
+               cbe_system_error_exception(regs);
+               break;
+       case SRR1_WAKETHERM:
+               cbe_thermal_exception(regs);
+               break;
+#endif /* CONFIG_CBE_RAS */
        default:
                /* do system reset */
                return 0;
@@ -162,68 +157,11 @@ static int cbe_system_reset_exception(struct pt_regs *regs)
        return 1;
 }
 
-static int __init cbe_find_pmd_mmio(int cpu, struct cbe_pervasive *p)
-{
-       struct device_node *node;
-       unsigned int *int_servers;
-       char *addr;
-       unsigned long real_address;
-       unsigned int size;
-
-       struct pmd_regs __iomem *pmd_mmio_area;
-       int hardid, thread;
-       int proplen;
-
-       pmd_mmio_area = NULL;
-       hardid = get_hard_smp_processor_id(cpu);
-       for (node = NULL; (node = of_find_node_by_type(node, "cpu"));) {
-               int_servers = (void *) get_property(node,
-                               "ibm,ppc-interrupt-server#s", &proplen);
-               if (!int_servers) {
-                       printk(KERN_WARNING "%s misses "
-                               "ibm,ppc-interrupt-server#s property",
-                               node->full_name);
-                       continue;
-               }
-               for (thread = 0; thread < proplen / sizeof (int); thread++) {
-                       if (hardid == int_servers[thread]) {
-                               addr = get_property(node, "pervasive", NULL);
-                               goto found;
-                       }
-               }
-       }
-
-       printk(KERN_WARNING "%s: CPU %d not found\n", __FUNCTION__, cpu);
-       return -EINVAL;
-
-found:
-       real_address = *(unsigned long*) addr;
-       addr += sizeof (unsigned long);
-       size = *(unsigned int*) addr;
-
-       pr_debug("pervasive area for CPU %d at %lx, size %x\n",
-                       cpu, real_address, size);
-       p->regs = ioremap(real_address, size);
-       p->thread = thread;
-       return 0;
-}
-
-void __init cell_pervasive_init(void)
+void __init cbe_pervasive_init(void)
 {
-       struct cbe_pervasive *p;
-       int cpu;
-       int ret;
-
        if (!cpu_has_feature(CPU_FTR_PAUSE_ZERO))
                return;
 
-       for_each_possible_cpu(cpu) {
-               p = &cbe_pervasive[cpu];
-               ret = cbe_find_pmd_mmio(cpu, p);
-               if (ret)
-                       return;
-       }
-
        ppc_md.idle_loop = cbe_idle;
        ppc_md.system_reset_exception = cbe_system_reset_exception;
 }