edac mpc85xx: add support for mpc8572

This adds support for the dual-core MPC8572 processor.  We have
to support making SPR changes on each core.  Also, since we can
have multiple memory controllers sharing an interrupt, flag the
interrupts with IRQF_SHARED.

Signed-off-by: Andrew Kilkenny <akilkenny@xes-inc.com>
Signed-off-by: Nate Case <ncase@xes-inc.com>
Acked-by: Dave Jiang <djiang@mvista.com>
Signed-off-by: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 26 insertions, 7 deletions

diff --git a/drivers/edac/mpc85xx_edac.c b/drivers/edac/mpc85xx_edac.c
index 2265d9ca1535..0cfcb2d075a0 100644
--- a/drivers/edac/mpc85xx_edac.c
+++ b/drivers/edac/mpc85xx_edac.c
@@ -17,6 +17,7 @@
 #include <linux/io.h>
 #include <linux/mod_devicetable.h>
 #include <linux/edac.h>
+#include <linux/smp.h>
 
 #include <linux/of_platform.h>
 #include <linux/of_device.h>
@@ -40,7 +41,7 @@ static u32 orig_pci_err_en;
 #endif
 
 static u32 orig_l2_err_disable;
-static u32 orig_hid1;
+static u32 orig_hid1[2];
 
 /************************ MC SYSFS parts ***********************************/
 
@@ -647,6 +648,9 @@ static struct of_device_id mpc85xx_l2_err_of_match[] = {
         {
          .compatible = "fsl,8568-l2-cache-controller",
          },
+        {
+         .compatible = "fsl,mpc8572-l2-cache-controller",
+         },
         {},
 };
 
@@ -912,7 +916,8 @@ static int __devinit mpc85xx_mc_err_probe(struct of_device *op,
                 /* register interrupts */
                 pdata->irq = irq_of_parse_and_map(op->node, 0);
                 res = devm_request_irq(&op->dev, pdata->irq,
-                                       mpc85xx_mc_isr, IRQF_DISABLED,
+                                       mpc85xx_mc_isr,
+                                        IRQF_DISABLED | IRQF_SHARED,
                                        "[EDAC] MC err", mci);
                 if (res < 0) {
                         printk(KERN_ERR "%s: Unable to request irq %d for "
@@ -980,6 +985,9 @@ static struct of_device_id mpc85xx_mc_err_of_match[] = {
         {
          .compatible = "fsl,8568-memory-controller",
          },
+        {
+         .compatible = "fsl,mpc8572-memory-controller",
+         },
         {},
 };
 
@@ -995,6 +1003,14 @@ static struct of_platform_driver mpc85xx_mc_err_driver = {
                    },
 };
 
+
+static void __init mpc85xx_mc_clear_rfxe(void *data)
+{
+        orig_hid1[smp_processor_id()] = mfspr(SPRN_HID1);
+        mtspr(SPRN_HID1, (orig_hid1[smp_processor_id()] & ~0x20000));
+}
+
+
 static int __init mpc85xx_mc_init(void)
 {
         int res = 0;
@@ -1030,19 +1046,22 @@ static int __init mpc85xx_mc_init(void)
          * need to clear HID1[RFXE] to disable machine check int
          * so we can catch it
          */
-        if (edac_op_state == EDAC_OPSTATE_INT) {
-                orig_hid1 = mfspr(SPRN_HID1);
-                mtspr(SPRN_HID1, (orig_hid1 & ~0x20000));
-        }
+        if (edac_op_state == EDAC_OPSTATE_INT)
+                on_each_cpu(mpc85xx_mc_clear_rfxe, NULL, 0);
 
         return 0;
 }
 
 module_init(mpc85xx_mc_init);
 
+static void __exit mpc85xx_mc_restore_hid1(void *data)
+{
+        mtspr(SPRN_HID1, orig_hid1[smp_processor_id()]);
+}
+
 static void __exit mpc85xx_mc_exit(void)
 {
-        mtspr(SPRN_HID1, orig_hid1);
+        on_each_cpu(mpc85xx_mc_restore_hid1, NULL, 0);
 #ifdef CONFIG_PCI
         of_unregister_platform_driver(&mpc85xx_pci_err_driver);
 #endif