#undef DEBUG
-#include <linux/config.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/percpu.h>
#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)
+static void cbe_power_save(void)
{
- unsigned long thread_switch_control;
- unsigned long temp_register;
- struct cbe_pervasive *p;
- int thread;
-
- spin_lock_irq(&cbe_pervasive_lock);
- p = &cbe_pervasive[smp_processor_id()];
+ unsigned long ctrl, thread_switch_control;
- if (!cbe_pervasive->regs)
- goto out;
+ /*
+ * We need to hard disable interrupts, but we also need to mark them
+ * hard disabled in the PACA so that the local_irq_enable() done by
+ * our caller upon return propertly hard enables.
+ */
+ hard_irq_disable();
+ get_paca()->hard_enabled = 0;
- pr_debug("Power Management: CPU %d\n", smp_processor_id());
-
- /* Enable Pause(0) control bit */
- temp_register = in_be64(&p->regs->pm_control);
-
- out_be64(&p->regs->pm_control,
- temp_register|PMD_PAUSE_ZERO_CONTROL);
+ ctrl = mfspr(SPRN_CTRLF);
/* Enable DEC and EE interrupt request */
thread_switch_control = mfspr(SPRN_TSC_CELL);
thread_switch_control |= TSC_CELL_EE_ENABLE | TSC_CELL_EE_BOOST;
- switch ((mfspr(SPRN_CTRLF) & CTRL_CT)) {
+ switch (ctrl & 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:
- spin_unlock_irq(&cbe_pervasive_lock);
-}
-
-static void cbe_idle(void)
-{
- unsigned long ctrl;
-
- cbe_enable_pause_zero();
-
- while (1) {
- if (!need_resched()) {
- local_irq_disable();
- while (!need_resched()) {
- /* go into low thread priority */
- HMT_low();
-
- /*
- * atomically disable thread execution
- * and runlatch.
- * External and Decrementer exceptions
- * are still handled when the thread
- * is disabled but now enter in
- * cbe_system_reset_exception()
- */
- ctrl = mfspr(SPRN_CTRLF);
- ctrl &= ~(CTRL_RUNLATCH | CTRL_TE);
- mtspr(SPRN_CTRLT, ctrl);
- }
- /* restore thread prio */
- HMT_medium();
- local_irq_enable();
- }
-
- /*
- * turn runlatch on again before scheduling the
- * process we just woke up
- */
- ppc64_runlatch_on();
-
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
- }
+ /*
+ * go into low thread priority, medium priority will be
+ * restored for us after wake-up.
+ */
+ HMT_low();
+
+ /*
+ * atomically disable thread execution and runlatch.
+ * External and Decrementer exceptions are still handled when the
+ * thread is disabled but now enter in cbe_system_reset_exception()
+ */
+ ctrl &= ~(CTRL_RUNLATCH | CTRL_TE);
+ mtspr(SPRN_CTRLT, ctrl);
}
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;
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, _PAGE_NO_CACHE);
- 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_cpu(cpu) {
- p = &cbe_pervasive[cpu];
- ret = cbe_find_pmd_mmio(cpu, p);
- if (ret)
- return;
+ for_each_possible_cpu(cpu) {
+ struct cbe_pmd_regs __iomem *regs = cbe_get_cpu_pmd_regs(cpu);
+ if (!regs)
+ continue;
+
+ /* Enable Pause(0) control bit */
+ out_be64(®s->pmcr, in_be64(®s->pmcr) |
+ CBE_PMD_PAUSE_ZERO_CONTROL);
}
- ppc_md.idle_loop = cbe_idle;
+ ppc_md.power_save = cbe_power_save;
ppc_md.system_reset_exception = cbe_system_reset_exception;
}
git://git.onelab.eu / linux-2.6.git / blobdiff