x86, irq: get nr_irqs from madt

[deliverable/linux.git] / arch / x86 / kernel / acpi / boot.c

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index c102af85df9ca4443b9b4a12db8b77ceccf90a82..3e9d163fd92f5e91565e70f4168b50217ed5791f 100644 (file)
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -58,7 +58,6 @@ EXPORT_SYMBOL(acpi_disabled);
 #ifdef CONFIG_X86_64
 
 #include <asm/proto.h>
-#include <asm/genapic.h>
 
 #else                          /* X86 */
 
@@ -97,8 +96,6 @@ static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
 #warning ACPI uses CMPXCHG, i486 and later hardware
 #endif
 
-static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
-
 /* --------------------------------------------------------------------------
                               Boot-time Configuration
    -------------------------------------------------------------------------- */
@@ -160,6 +157,8 @@ char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 struct acpi_mcfg_allocation *pci_mmcfg_config;
 int pci_mmcfg_config_num;
 
+static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
+
 static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg)
 {
        if (!strcmp(mcfg->header.oem_id, "SGI"))
@@ -253,10 +252,8 @@ static void __cpuinit acpi_register_lapic(int id, u8 enabled)
                return;
        }
 
-#ifdef CONFIG_X86_32
        if (boot_cpu_physical_apicid != -1U)
                ver = apic_version[boot_cpu_physical_apicid];
-#endif
 
        generic_processor_info(id, ver);
 }
@@ -775,11 +772,9 @@ static void __init acpi_register_lapic_address(unsigned long address)
 
        set_fixmap_nocache(FIX_APIC_BASE, address);
        if (boot_cpu_physical_apicid == -1U) {
-               boot_cpu_physical_apicid  = GET_APIC_ID(read_apic_id());
-#ifdef CONFIG_X86_32
+               boot_cpu_physical_apicid  = read_apic_id();
                apic_version[boot_cpu_physical_apicid] =
                         GET_APIC_VERSION(apic_read(APIC_LVR));
-#endif
        }
 }
 
@@ -962,6 +957,29 @@ void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
        nr_ioapics++;
 }
 
+int get_nr_irqs_via_madt(void)
+{
+       int idx;
+       int nr = 0;
+
+       for (idx = 0; idx < nr_ioapics; idx++) {
+               if (mp_ioapic_routing[idx].gsi_end > nr)
+                       nr = mp_ioapic_routing[idx].gsi_end;
+       }
+
+       nr++;
+
+       /* double it for hotplug and msi and nmi */
+       nr <<= 1;
+
+       /* something wrong ? */
+       if (nr < 32)
+               nr = 32;
+
+       return nr;
+
+}
+
 static void assign_to_mp_irq(struct mp_config_intsrc *m,
                                    struct mp_config_intsrc *mp_irq)
 {
@@ -1259,9 +1277,12 @@ static int __init acpi_parse_madt_ioapic_entries(void)
                return count;
        }
 
+
+       nr_irqs = get_nr_irqs_via_madt();
+
        count =
            acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
-                                 NR_IRQ_VECTORS);
+                                 nr_irqs);
        if (count < 0) {
                printk(KERN_ERR PREFIX
                       "Error parsing interrupt source overrides entry\n");
@@ -1281,7 +1302,7 @@ static int __init acpi_parse_madt_ioapic_entries(void)
 
        count =
            acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
-                                 NR_IRQ_VECTORS);
+                                 nr_irqs);
        if (count < 0) {
                printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
                /* TBD: Cleanup to allow fallback to MPS */
@@ -1351,7 +1372,9 @@ static void __init acpi_process_madt(void)
                                acpi_ioapic = 1;
 
                                smp_found_config = 1;
+#ifdef CONFIG_X86_32
                                setup_apic_routing();
+#endif
                        }
                }
                if (error == -EINVAL) {
@@ -1421,8 +1444,16 @@ static int __init force_acpi_ht(const struct dmi_system_id *d)
  */
 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
 {
-       pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d->ident);
-       acpi_skip_timer_override = 1;
+       /*
+        * The ati_ixp4x0_rev() early PCI quirk should have set
+        * the acpi_skip_timer_override flag already:
+        */
+       if (!acpi_skip_timer_override) {
+               WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
+               pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
+                       d->ident);
+               acpi_skip_timer_override = 1;
+       }
        return 0;
 }