vserver 1.9.3

[linux-2.6.git] / arch / x86_64 / kernel / i8259.c

diff --git a/arch/x86_64/kernel/i8259.c b/arch/x86_64/kernel/i8259.c
index 304b6a3..f5d084a 100644 (file)
--- a/arch/x86_64/kernel/i8259.c
+++ b/arch/x86_64/kernel/i8259.c
@@ -47,6 +47,12 @@
        BI(x,8) BI(x,9) BI(x,a) BI(x,b) \
        BI(x,c) BI(x,d) BI(x,e) BI(x,f)
 
+#define BUILD_14_IRQS(x) \
+       BI(x,0) BI(x,1) BI(x,2) BI(x,3) \
+       BI(x,4) BI(x,5) BI(x,6) BI(x,7) \
+       BI(x,8) BI(x,9) BI(x,a) BI(x,b) \
+       BI(x,c) BI(x,d)
+
 /*
  * ISA PIC or low IO-APIC triggered (INTA-cycle or APIC) interrupts:
  * (these are usually mapped to vectors 0x20-0x2f)
@@ -68,9 +74,15 @@ BUILD_16_IRQS(0x0)
 BUILD_16_IRQS(0x4) BUILD_16_IRQS(0x5) BUILD_16_IRQS(0x6) BUILD_16_IRQS(0x7)
 BUILD_16_IRQS(0x8) BUILD_16_IRQS(0x9) BUILD_16_IRQS(0xa) BUILD_16_IRQS(0xb)
 BUILD_16_IRQS(0xc) BUILD_16_IRQS(0xd)
+
+#ifdef CONFIG_PCI_MSI
+       BUILD_14_IRQS(0xe)
+#endif
+
 #endif
 
 #undef BUILD_16_IRQS
+#undef BUILD_14_IRQS
 #undef BI
 
 
@@ -83,6 +95,12 @@ BUILD_16_IRQS(0xc) BUILD_16_IRQS(0xd)
        IRQ(x,8), IRQ(x,9), IRQ(x,a), IRQ(x,b), \
        IRQ(x,c), IRQ(x,d), IRQ(x,e), IRQ(x,f)
 
+#define IRQLIST_14(x) \
+       IRQ(x,0), IRQ(x,1), IRQ(x,2), IRQ(x,3), \
+       IRQ(x,4), IRQ(x,5), IRQ(x,6), IRQ(x,7), \
+       IRQ(x,8), IRQ(x,9), IRQ(x,a), IRQ(x,b), \
+       IRQ(x,c), IRQ(x,d)
+
 void (*interrupt[NR_IRQS])(void) = {
        IRQLIST_16(0x0),
 
@@ -91,11 +109,17 @@ void (*interrupt[NR_IRQS])(void) = {
        IRQLIST_16(0x4), IRQLIST_16(0x5), IRQLIST_16(0x6), IRQLIST_16(0x7),
        IRQLIST_16(0x8), IRQLIST_16(0x9), IRQLIST_16(0xa), IRQLIST_16(0xb),
        IRQLIST_16(0xc), IRQLIST_16(0xd)
+
+#ifdef CONFIG_PCI_MSI
+       , IRQLIST_14(0xe)
+#endif
+
 #endif
 };
 
 #undef IRQ
 #undef IRQLIST_16
+#undef IRQLIST_14
 
 /*
  * This is the 'legacy' 8259A Programmable Interrupt Controller,
@@ -305,7 +329,7 @@ spurious_8259A_irq:
                 * lets ACK and report it. [once per IRQ]
                 */
                if (!(spurious_irq_mask & irqmask)) {
-                       printk("spurious 8259A interrupt: IRQ%d.\n", irq);
+                       printk(KERN_DEBUG "spurious 8259A interrupt: IRQ%d.\n", irq);
                        spurious_irq_mask |= irqmask;
                }
                atomic_inc(&irq_err_count);
@@ -318,7 +342,7 @@ spurious_8259A_irq:
        }
 }
 
-void __init init_8259A(int auto_eoi)
+void init_8259A(int auto_eoi)
 {
        unsigned long flags;
 
@@ -361,11 +385,62 @@ void __init init_8259A(int auto_eoi)
        spin_unlock_irqrestore(&i8259A_lock, flags);
 }
 
+static char irq_trigger[2];
+/**
+ * ELCR registers (0x4d0, 0x4d1) control edge/level of IRQ
+ */
+static void restore_ELCR(char *trigger)
+{
+       outb(trigger[0], 0x4d0);
+       outb(trigger[1], 0x4d1);
+}
+
+static void save_ELCR(char *trigger)
+{
+       /* IRQ 0,1,2,8,13 are marked as reserved */
+       trigger[0] = inb(0x4d0) & 0xF8;
+       trigger[1] = inb(0x4d1) & 0xDE;
+}
+
+static int i8259A_resume(struct sys_device *dev)
+{
+       init_8259A(0);
+       restore_ELCR(irq_trigger);
+       return 0;
+}
+
+static int i8259A_suspend(struct sys_device *dev, u32 state)
+{
+       save_ELCR(irq_trigger);
+       return 0;
+}
+
+static struct sysdev_class i8259_sysdev_class = {
+       set_kset_name("i8259"),
+       .suspend = i8259A_suspend,
+       .resume = i8259A_resume,
+};
+
+static struct sys_device device_i8259A = {
+       .id     = 0,
+       .cls    = &i8259_sysdev_class,
+};
+
+static int __init i8259A_init_sysfs(void)
+{
+       int error = sysdev_class_register(&i8259_sysdev_class);
+       if (!error)
+               error = sysdev_register(&device_i8259A);
+       return error;
+}
+
+device_initcall(i8259A_init_sysfs);
+
 /*
  * IRQ2 is cascade interrupt to second interrupt controller
  */
 
-static struct irqaction irq2 = { no_action, 0, 0, "cascade", NULL, NULL};
+static struct irqaction irq2 = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL};
 
 void __init init_ISA_irqs (void)
 {
@@ -378,7 +453,7 @@ void __init init_ISA_irqs (void)
 
        for (i = 0; i < NR_IRQS; i++) {
                irq_desc[i].status = IRQ_DISABLED;
-               irq_desc[i].action = 0;
+               irq_desc[i].action = NULL;
                irq_desc[i].depth = 1;
 
                if (i < 16) {