x86: seperate probe_roms into another file

it is only needed for 32bit

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/Makefile

@@ -19,6 +19,7 @@ obj-y			:= process_$(BITS).o signal_$(BITS).o entry_$(BITS).o
 obj-y			+= traps_$(BITS).o irq_$(BITS).o
 obj-y			+= time_$(BITS).o ioport.o ldt.o
 obj-y			+= setup_$(BITS).o i8259.o irqinit_$(BITS).o setup.o
+obj-$(CONFIG_X86_32)	+= probe_roms_32.o
 obj-$(CONFIG_X86_32)	+= sys_i386_32.o i386_ksyms_32.o
 obj-$(CONFIG_X86_64)	+= sys_x86_64.o x8664_ksyms_64.o
 obj-$(CONFIG_X86_64)	+= syscall_64.o vsyscall_64.o setup64.o

arch/x86/kernel/probe_roms_32.c

@@ -0,0 +1,166 @@
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/uaccess.h>
+#include <linux/mmzone.h>
+#include <linux/ioport.h>
+#include <linux/seq_file.h>
+#include <linux/console.h>
+#include <linux/init.h>
+#include <linux/edd.h>
+#include <linux/dmi.h>
+#include <linux/pfn.h>
+#include <linux/pci.h>
+#include <asm/pci-direct.h>
+
+
+#include <asm/e820.h>
+#include <asm/mmzone.h>
+#include <asm/setup.h>
+#include <asm/sections.h>
+#include <asm/io.h>
+#include <setup_arch.h>
+
+static struct resource system_rom_resource = {
+	.name	= "System ROM",
+	.start	= 0xf0000,
+	.end	= 0xfffff,
+	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+};
+
+static struct resource extension_rom_resource = {
+	.name	= "Extension ROM",
+	.start	= 0xe0000,
+	.end	= 0xeffff,
+	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+};
+
+static struct resource adapter_rom_resources[] = { {
+	.name 	= "Adapter ROM",
+	.start	= 0xc8000,
+	.end	= 0,
+	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+}, {
+	.name 	= "Adapter ROM",
+	.start	= 0,
+	.end	= 0,
+	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+}, {
+	.name 	= "Adapter ROM",
+	.start	= 0,
+	.end	= 0,
+	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+}, {
+	.name 	= "Adapter ROM",
+	.start	= 0,
+	.end	= 0,
+	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+}, {
+	.name 	= "Adapter ROM",
+	.start	= 0,
+	.end	= 0,
+	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+}, {
+	.name 	= "Adapter ROM",
+	.start	= 0,
+	.end	= 0,
+	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+} };
+
+static struct resource video_rom_resource = {
+	.name 	= "Video ROM",
+	.start	= 0xc0000,
+	.end	= 0xc7fff,
+	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
+};
+
+#define ROMSIGNATURE 0xaa55
+
+static int __init romsignature(const unsigned char *rom)
+{
+	const unsigned short * const ptr = (const unsigned short *)rom;
+	unsigned short sig;
+
+	return probe_kernel_address(ptr, sig) == 0 && sig == ROMSIGNATURE;
+}
+
+static int __init romchecksum(const unsigned char *rom, unsigned long length)
+{
+	unsigned char sum, c;
+
+	for (sum = 0; length && probe_kernel_address(rom++, c) == 0; length--)
+		sum += c;
+	return !length && !sum;
+}
+
+void __init probe_roms(void)
+{
+	const unsigned char *rom;
+	unsigned long start, length, upper;
+	unsigned char c;
+	int i;
+
+	/* video rom */
+	upper = adapter_rom_resources[0].start;
+	for (start = video_rom_resource.start; start < upper; start += 2048) {
+		rom = isa_bus_to_virt(start);
+		if (!romsignature(rom))
+			continue;
+
+		video_rom_resource.start = start;
+
+		if (probe_kernel_address(rom + 2, c) != 0)
+			continue;
+
+		/* 0 < length <= 0x7f * 512, historically */
+		length = c * 512;
+
+		/* if checksum okay, trust length byte */
+		if (length && romchecksum(rom, length))
+			video_rom_resource.end = start + length - 1;
+
+		request_resource(&iomem_resource, &video_rom_resource);
+		break;
+	}
+
+	start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
+	if (start < upper)
+		start = upper;
+
+	/* system rom */
+	request_resource(&iomem_resource, &system_rom_resource);
+	upper = system_rom_resource.start;
+
+	/* check for extension rom (ignore length byte!) */
+	rom = isa_bus_to_virt(extension_rom_resource.start);
+	if (romsignature(rom)) {
+		length = extension_rom_resource.end - extension_rom_resource.start + 1;
+		if (romchecksum(rom, length)) {
+			request_resource(&iomem_resource, &extension_rom_resource);
+			upper = extension_rom_resource.start;
+		}
+	}
+
+	/* check for adapter roms on 2k boundaries */
+	for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper; start += 2048) {
+		rom = isa_bus_to_virt(start);
+		if (!romsignature(rom))
+			continue;
+
+		if (probe_kernel_address(rom + 2, c) != 0)
+			continue;
+
+		/* 0 < length <= 0x7f * 512, historically */
+		length = c * 512;
+
+		/* but accept any length that fits if checksum okay */
+		if (!length || start + length > upper || !romchecksum(rom, length))
+			continue;
+
+		adapter_rom_resources[i].start = start;
+		adapter_rom_resources[i].end = start + length - 1;
+		request_resource(&iomem_resource, &adapter_rom_resources[i]);
+
+		start = adapter_rom_resources[i++].end & ~2047UL;
+	}
+}
+

arch/x86/kernel/setup_32.c

@@ -606,8 +606,6 @@ static void set_mca_bus(int x)
 static void set_mca_bus(int x) { }
 #endif
 
-static void probe_roms(void);
-
 /*
  * Determine if we were loaded by an EFI loader.  If so, then we have also been
  * passed the efi memmap, systab, etc., so we should use these data structures
@@ -843,147 +841,3 @@ void __init setup_arch(char **cmdline_p)
 #endif
 }
 
-static struct resource system_rom_resource = {
-	.name	= "System ROM",
-	.start	= 0xf0000,
-	.end	= 0xfffff,
-	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
-};
-
-static struct resource extension_rom_resource = {
-	.name	= "Extension ROM",
-	.start	= 0xe0000,
-	.end	= 0xeffff,
-	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
-};
-
-static struct resource adapter_rom_resources[] = { {
-	.name 	= "Adapter ROM",
-	.start	= 0xc8000,
-	.end	= 0,
-	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
-}, {
-	.name 	= "Adapter ROM",
-	.start	= 0,
-	.end	= 0,
-	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
-}, {
-	.name 	= "Adapter ROM",
-	.start	= 0,
-	.end	= 0,
-	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
-}, {
-	.name 	= "Adapter ROM",
-	.start	= 0,
-	.end	= 0,
-	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
-}, {
-	.name 	= "Adapter ROM",
-	.start	= 0,
-	.end	= 0,
-	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
-}, {
-	.name 	= "Adapter ROM",
-	.start	= 0,
-	.end	= 0,
-	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
-} };
-
-static struct resource video_rom_resource = {
-	.name 	= "Video ROM",
-	.start	= 0xc0000,
-	.end	= 0xc7fff,
-	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
-};
-
-#define ROMSIGNATURE 0xaa55
-
-static int __init romsignature(const unsigned char *rom)
-{
-	const unsigned short * const ptr = (const unsigned short *)rom;
-	unsigned short sig;
-
-	return probe_kernel_address(ptr, sig) == 0 && sig == ROMSIGNATURE;
-}
-
-static int __init romchecksum(const unsigned char *rom, unsigned long length)
-{
-	unsigned char sum, c;
-
-	for (sum = 0; length && probe_kernel_address(rom++, c) == 0; length--)
-		sum += c;
-	return !length && !sum;
-}
-
-static void __init probe_roms(void)
-{
-	const unsigned char *rom;
-	unsigned long start, length, upper;
-	unsigned char c;
-	int i;
-
-	/* video rom */
-	upper = adapter_rom_resources[0].start;
-	for (start = video_rom_resource.start; start < upper; start += 2048) {
-		rom = isa_bus_to_virt(start);
-		if (!romsignature(rom))
-			continue;
-
-		video_rom_resource.start = start;
-
-		if (probe_kernel_address(rom + 2, c) != 0)
-			continue;
-
-		/* 0 < length <= 0x7f * 512, historically */
-		length = c * 512;
-
-		/* if checksum okay, trust length byte */
-		if (length && romchecksum(rom, length))
-			video_rom_resource.end = start + length - 1;
-
-		request_resource(&iomem_resource, &video_rom_resource);
-		break;
-	}
-
-	start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
-	if (start < upper)
-		start = upper;
-
-	/* system rom */
-	request_resource(&iomem_resource, &system_rom_resource);
-	upper = system_rom_resource.start;
-
-	/* check for extension rom (ignore length byte!) */
-	rom = isa_bus_to_virt(extension_rom_resource.start);
-	if (romsignature(rom)) {
-		length = extension_rom_resource.end - extension_rom_resource.start + 1;
-		if (romchecksum(rom, length)) {
-			request_resource(&iomem_resource, &extension_rom_resource);
-			upper = extension_rom_resource.start;
-		}
-	}
-
-	/* check for adapter roms on 2k boundaries */
-	for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper; start += 2048) {
-		rom = isa_bus_to_virt(start);
-		if (!romsignature(rom))
-			continue;
-
-		if (probe_kernel_address(rom + 2, c) != 0)
-			continue;
-
-		/* 0 < length <= 0x7f * 512, historically */
-		length = c * 512;
-
-		/* but accept any length that fits if checksum okay */
-		if (!length || start + length > upper || !romchecksum(rom, length))
-			continue;
-
-		adapter_rom_resources[i].start = start;
-		adapter_rom_resources[i].end = start + length - 1;
-		request_resource(&iomem_resource, &adapter_rom_resources[i]);
-
-		start = adapter_rom_resources[i++].end & ~2047UL;
-	}
-}
-

include/asm-x86/setup.h

@@ -54,6 +54,7 @@ extern struct boot_params boot_params;
 #ifdef __i386__
 
 void __init i386_start_kernel(void);
+extern void probe_roms(void);
 
 extern unsigned long init_pg_tables_start;
 extern unsigned long init_pg_tables_end;