x86: move ioapic code where it belongs

The commit 3992872 hacked the
ioapic resource mapping into apic.c for no good reason.
Move the code into io_apic_64.c where it belongs.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/apic_64.c

@@ -49,7 +49,6 @@ static int apic_calibrate_pmtmr __initdata;
 int local_apic_timer_c2_ok;
 EXPORT_SYMBOL_GPL(local_apic_timer_c2_ok);
 
-static struct resource *ioapic_resources;
 static struct resource lapic_resource = {
 	.name = "Local APIC",
 	.flags = IORESOURCE_MEM | IORESOURCE_BUSY,
@@ -714,64 +713,6 @@ static int __init detect_init_APIC (void)
 	return 0;
 }
 
-#ifdef CONFIG_X86_IO_APIC
-static struct resource * __init ioapic_setup_resources(void)
-{
-#define IOAPIC_RESOURCE_NAME_SIZE 11
-	unsigned long n;
-	struct resource *res;
-	char *mem;
-	int i;
-
-	if (nr_ioapics <= 0)
-		return NULL;
-
-	n = IOAPIC_RESOURCE_NAME_SIZE + sizeof(struct resource);
-	n *= nr_ioapics;
-
-	mem = alloc_bootmem(n);
-	res = (void *)mem;
-
-	if (mem != NULL) {
-		memset(mem, 0, n);
-		mem += sizeof(struct resource) * nr_ioapics;
-
-		for (i = 0; i < nr_ioapics; i++) {
-			res[i].name = mem;
-			res[i].flags = IORESOURCE_MEM | IORESOURCE_BUSY;
-			sprintf(mem,  "IOAPIC %u", i);
-			mem += IOAPIC_RESOURCE_NAME_SIZE;
-		}
-	}
-
-	ioapic_resources = res;
-
-	return res;
-}
-
-static int __init ioapic_insert_resources(void)
-{
-	int i;
-	struct resource *r = ioapic_resources;
-
-	if (!r) {
-		printk("IO APIC resources could be not be allocated.\n");
-		return -1;
-	}
-
-	for (i = 0; i < nr_ioapics; i++) {
-		insert_resource(&iomem_resource, r);
-		r++;
-	}
-
-	return 0;
-}
-
-/* Insert the IO APIC resources after PCI initialization has occured to handle
- * IO APICS that are mapped in on a BAR in PCI space. */
-late_initcall(ioapic_insert_resources);
-#endif
-
 void __init init_apic_mappings(void)
 {
 	unsigned long apic_phys;
@@ -801,34 +742,6 @@ void __init init_apic_mappings(void)
 	 * default configuration (or the MP table is broken).
 	 */
 	boot_cpu_id = GET_APIC_ID(apic_read(APIC_ID));
-
-	{
-		unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0;
-		int i;
-		struct resource *ioapic_res;
-
-		ioapic_res = ioapic_setup_resources();
-		for (i = 0; i < nr_ioapics; i++) {
-			if (smp_found_config) {
-				ioapic_phys = mp_ioapics[i].mpc_apicaddr;
-			} else {
-				ioapic_phys = (unsigned long)
-					alloc_bootmem_pages(PAGE_SIZE);
-				ioapic_phys = __pa(ioapic_phys);
-			}
-			set_fixmap_nocache(idx, ioapic_phys);
-			apic_printk(APIC_VERBOSE,
-				    "mapped IOAPIC to %016lx (%016lx)\n",
-				    __fix_to_virt(idx), ioapic_phys);
-			idx++;
-
-			if (ioapic_res != NULL) {
-				ioapic_res->start = ioapic_phys;
-				ioapic_res->end = ioapic_phys + (4 * 1024) - 1;
-				ioapic_res++;
-			}
-		}
-	}
 }
 
 /*

arch/x86/kernel/io_apic_64.c

@@ -35,6 +35,7 @@
 #ifdef CONFIG_ACPI
 #include <acpi/acpi_bus.h>
 #endif
+#include <linux/bootmem.h>
 
 #include <asm/idle.h>
 #include <asm/io.h>
@@ -2288,3 +2289,92 @@ void __init setup_ioapic_dest(void)
 }
 #endif
 
+#define IOAPIC_RESOURCE_NAME_SIZE 11
+
+static struct resource *ioapic_resources;
+
+static struct resource * __init ioapic_setup_resources(void)
+{
+	unsigned long n;
+	struct resource *res;
+	char *mem;
+	int i;
+
+	if (nr_ioapics <= 0)
+		return NULL;
+
+	n = IOAPIC_RESOURCE_NAME_SIZE + sizeof(struct resource);
+	n *= nr_ioapics;
+
+	mem = alloc_bootmem(n);
+	res = (void *)mem;
+
+	if (mem != NULL) {
+		memset(mem, 0, n);
+		mem += sizeof(struct resource) * nr_ioapics;
+
+		for (i = 0; i < nr_ioapics; i++) {
+			res[i].name = mem;
+			res[i].flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+			sprintf(mem,  "IOAPIC %u", i);
+			mem += IOAPIC_RESOURCE_NAME_SIZE;
+		}
+	}
+
+	ioapic_resources = res;
+
+	return res;
+}
+
+void __init ioapic_init_mappings(void)
+{
+	unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0;
+	struct resource *ioapic_res;
+	int i;
+
+	ioapic_res = ioapic_setup_resources();
+	for (i = 0; i < nr_ioapics; i++) {
+		if (smp_found_config) {
+			ioapic_phys = mp_ioapics[i].mpc_apicaddr;
+		} else {
+			ioapic_phys = (unsigned long)
+				alloc_bootmem_pages(PAGE_SIZE);
+			ioapic_phys = __pa(ioapic_phys);
+		}
+		set_fixmap_nocache(idx, ioapic_phys);
+		apic_printk(APIC_VERBOSE,
+			    "mapped IOAPIC to %016lx (%016lx)\n",
+			    __fix_to_virt(idx), ioapic_phys);
+		idx++;
+
+		if (ioapic_res != NULL) {
+			ioapic_res->start = ioapic_phys;
+			ioapic_res->end = ioapic_phys + (4 * 1024) - 1;
+			ioapic_res++;
+		}
+	}
+}
+
+static int __init ioapic_insert_resources(void)
+{
+	int i;
+	struct resource *r = ioapic_resources;
+
+	if (!r) {
+		printk(KERN_ERR
+		       "IO APIC resources could be not be allocated.\n");
+		return -1;
+	}
+
+	for (i = 0; i < nr_ioapics; i++) {
+		insert_resource(&iomem_resource, r);
+		r++;
+	}
+
+	return 0;
+}
+
+/* Insert the IO APIC resources after PCI initialization has occured to handle
+ * IO APICS that are mapped in on a BAR in PCI space. */
+late_initcall(ioapic_insert_resources);
+

arch/x86/kernel/setup_64.c

@@ -433,6 +433,7 @@ void __init setup_arch(char **cmdline_p)
 	if (smp_found_config)
 		get_smp_config();
 	init_apic_mappings();
+	ioapic_init_mappings();
 
 	/*
 	 * We trust e820 completely. No explicit ROM probing in memory.

include/asm-x86/io_apic_64.h

@@ -127,6 +127,8 @@ extern int io_apic_get_redir_entries (int ioapic);
 extern int io_apic_set_pci_routing (int ioapic, int pin, int irq, int, int);
 #endif
 
+extern void ioapic_init_mappings(void);
+
 extern int sis_apic_bug; /* dummy */ 
 
 #endif