Merge with /shiny/git/linux-2.6/.git

[karo-tx-linux.git] / arch / i386 / pci / irq.c

diff --git a/arch/i386/pci/irq.c b/arch/i386/pci/irq.c
index 83458f81e661ef7283936565e396f594780137e6..766b104ac1a1a55917c435698f25ec5992ff5b88 100644 (file)
--- a/arch/i386/pci/irq.c
+++ b/arch/i386/pci/irq.c
@@ -57,6 +57,35 @@ struct irq_router_handler {
 
 int (*pcibios_enable_irq)(struct pci_dev *dev) = NULL;
 
+/*
+ *  Check passed address for the PCI IRQ Routing Table signature
+ *  and perform checksum verification.
+ */
+
+static inline struct irq_routing_table * pirq_check_routing_table(u8 *addr)
+{
+       struct irq_routing_table *rt;
+       int i;
+       u8 sum;
+
+       rt = (struct irq_routing_table *) addr;
+       if (rt->signature != PIRQ_SIGNATURE ||
+           rt->version != PIRQ_VERSION ||
+           rt->size % 16 ||
+           rt->size < sizeof(struct irq_routing_table))
+               return NULL;
+       sum = 0;
+       for (i=0; i < rt->size; i++)
+               sum += addr[i];
+       if (!sum) {
+               DBG("PCI: Interrupt Routing Table found at 0x%p\n", rt);
+               return rt;
+       }
+       return NULL;
+}
+
+
+
 /*
  *  Search 0xf0000 -- 0xfffff for the PCI IRQ Routing Table.
  */
@@ -65,23 +94,17 @@ static struct irq_routing_table * __init pirq_find_routing_table(void)
 {
        u8 *addr;
        struct irq_routing_table *rt;
-       int i;
-       u8 sum;
 
+       if (pirq_table_addr) {
+               rt = pirq_check_routing_table((u8 *) __va(pirq_table_addr));
+               if (rt)
+                       return rt;
+               printk(KERN_WARNING "PCI: PIRQ table NOT found at pirqaddr\n");
+       }
        for(addr = (u8 *) __va(0xf0000); addr < (u8 *) __va(0x100000); addr += 16) {
-               rt = (struct irq_routing_table *) addr;
-               if (rt->signature != PIRQ_SIGNATURE ||
-                   rt->version != PIRQ_VERSION ||
-                   rt->size % 16 ||
-                   rt->size < sizeof(struct irq_routing_table))
-                       continue;
-               sum = 0;
-               for(i=0; i<rt->size; i++)
-                       sum += addr[i];
-               if (!sum) {
-                       DBG("PCI: Interrupt Routing Table found at 0x%p\n", rt);
+               rt = pirq_check_routing_table(addr);
+               if (rt)
                        return rt;
-               }
        }
        return NULL;
 }
@@ -1028,24 +1051,28 @@ static int __init pcibios_irq_init(void)
 subsys_initcall(pcibios_irq_init);
 
 
-static void pirq_penalize_isa_irq(int irq)
+static void pirq_penalize_isa_irq(int irq, int active)
 {
        /*
         *  If any ISAPnP device reports an IRQ in its list of possible
         *  IRQ's, we try to avoid assigning it to PCI devices.
         */
-       if (irq < 16)
-               pirq_penalty[irq] += 100;
+       if (irq < 16) {
+               if (active)
+                       pirq_penalty[irq] += 1000;
+               else
+                       pirq_penalty[irq] += 100;
+       }
 }
 
-void pcibios_penalize_isa_irq(int irq)
+void pcibios_penalize_isa_irq(int irq, int active)
 {
 #ifdef CONFIG_ACPI_PCI
        if (!acpi_noirq)
-               acpi_penalize_isa_irq(irq);
+               acpi_penalize_isa_irq(irq, active);
        else
 #endif
-               pirq_penalize_isa_irq(irq);
+               pirq_penalize_isa_irq(irq, active);
 }
 
 static int pirq_enable_irq(struct pci_dev *dev)