[PATCH] i386: i386 create e820.c to handle standard io/mem resources
authorbibo,mao <bibo.mao@intel.com>
Thu, 7 Dec 2006 01:14:06 +0000 (02:14 +0100)
committerAndi Kleen <andi@basil.nowhere.org>
Thu, 7 Dec 2006 01:14:06 +0000 (02:14 +0100)
This patch creates new file named e820.c to hanle standard io/mem
resources, moving request_standard_resources function from setup.c
to e820.c. Also this patch modifies Makfile to compile file e820.c.

Signed-off-by: bibo,mao <bibo.mao@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
 Makefile |    2
 arch/i386/kernel/Makefile |    2
 arch/i386/kernel/e820.c   |  289 ++++++++++++++++++++++++++++++++++++++++++++++
 arch/i386/kernel/setup.c  |  276 -------------------------------------------
 3 files changed, 293 insertions(+), 274 deletions(-)

arch/i386/kernel/Makefile
arch/i386/kernel/e820.c [new file with mode: 0644]
arch/i386/kernel/setup.c

index 1a884b6e6e5c97d472fb5c0e8c10d982f806d2f9..f614854bd71f4e114b7221e8044a1e7be769c507 100644 (file)
@@ -6,7 +6,7 @@ extra-y := head.o init_task.o vmlinux.lds
 
 obj-y  := process.o signal.o entry.o traps.o irq.o \
                ptrace.o time.o ioport.o ldt.o setup.o i8259.o sys_i386.o \
-               pci-dma.o i386_ksyms.o i387.o bootflag.o \
+               pci-dma.o i386_ksyms.o i387.o bootflag.o e820.o\
                quirks.o i8237.o topology.o alternative.o i8253.o tsc.o
 
 obj-$(CONFIG_STACKTRACE)       += stacktrace.o
diff --git a/arch/i386/kernel/e820.c b/arch/i386/kernel/e820.c
new file mode 100644 (file)
index 0000000..cce7060
--- /dev/null
@@ -0,0 +1,289 @@
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/ioport.h>
+#include <linux/string.h>
+#include <linux/kexec.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/efi.h>
+
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <asm/e820.h>
+
+#ifdef CONFIG_EFI
+int efi_enabled = 0;
+EXPORT_SYMBOL(efi_enabled);
+#endif
+
+struct e820map e820;
+struct resource data_resource = {
+       .name   = "Kernel data",
+       .start  = 0,
+       .end    = 0,
+       .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
+struct resource code_resource = {
+       .name   = "Kernel code",
+       .start  = 0,
+       .end    = 0,
+       .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
+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
+};
+
+static struct resource video_ram_resource = {
+       .name   = "Video RAM area",
+       .start  = 0xa0000,
+       .end    = 0xbffff,
+       .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
+static struct resource standard_io_resources[] = { {
+       .name   = "dma1",
+       .start  = 0x0000,
+       .end    = 0x001f,
+       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
+}, {
+       .name   = "pic1",
+       .start  = 0x0020,
+       .end    = 0x0021,
+       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
+}, {
+       .name   = "timer0",
+       .start  = 0x0040,
+       .end    = 0x0043,
+       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
+}, {
+       .name   = "timer1",
+       .start  = 0x0050,
+       .end    = 0x0053,
+       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
+}, {
+       .name   = "keyboard",
+       .start  = 0x0060,
+       .end    = 0x006f,
+       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
+}, {
+       .name   = "dma page reg",
+       .start  = 0x0080,
+       .end    = 0x008f,
+       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
+}, {
+       .name   = "pic2",
+       .start  = 0x00a0,
+       .end    = 0x00a1,
+       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
+}, {
+       .name   = "dma2",
+       .start  = 0x00c0,
+       .end    = 0x00df,
+       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
+}, {
+       .name   = "fpu",
+       .start  = 0x00f0,
+       .end    = 0x00ff,
+       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
+} };
+
+#define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
+
+static int __init romchecksum(unsigned char *rom, unsigned long length)
+{
+       unsigned char *p, sum = 0;
+
+       for (p = rom; p < rom + length; p++)
+               sum += *p;
+       return sum == 0;
+}
+
+static void __init probe_roms(void)
+{
+       unsigned long start, length, upper;
+       unsigned char *rom;
+       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;
+
+               /* 0 < length <= 0x7f * 512, historically */
+               length = rom[2] * 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;
+
+               /* 0 < length <= 0x7f * 512, historically */
+               length = rom[2] * 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;
+       }
+}
+
+/*
+ * Request address space for all standard RAM and ROM resources
+ * and also for regions reported as reserved by the e820.
+ */
+static void __init
+legacy_init_iomem_resources(struct resource *code_resource, struct resource *data_resource)
+{
+       int i;
+
+       probe_roms();
+       for (i = 0; i < e820.nr_map; i++) {
+               struct resource *res;
+#ifndef CONFIG_RESOURCES_64BIT
+               if (e820.map[i].addr + e820.map[i].size > 0x100000000ULL)
+                       continue;
+#endif
+               res = kzalloc(sizeof(struct resource), GFP_ATOMIC);
+               switch (e820.map[i].type) {
+               case E820_RAM:  res->name = "System RAM"; break;
+               case E820_ACPI: res->name = "ACPI Tables"; break;
+               case E820_NVS:  res->name = "ACPI Non-volatile Storage"; break;
+               default:        res->name = "reserved";
+               }
+               res->start = e820.map[i].addr;
+               res->end = res->start + e820.map[i].size - 1;
+               res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+               if (request_resource(&iomem_resource, res)) {
+                       kfree(res);
+                       continue;
+               }
+               if (e820.map[i].type == E820_RAM) {
+                       /*
+                        *  We don't know which RAM region contains kernel data,
+                        *  so we try it repeatedly and let the resource manager
+                        *  test it.
+                        */
+                       request_resource(res, code_resource);
+                       request_resource(res, data_resource);
+#ifdef CONFIG_KEXEC
+                       request_resource(res, &crashk_res);
+#endif
+               }
+       }
+}
+
+/*
+ * Request address space for all standard resources
+ *
+ * This is called just before pcibios_init(), which is also a
+ * subsys_initcall, but is linked in later (in arch/i386/pci/common.c).
+ */
+static int __init request_standard_resources(void)
+{
+       int i;
+
+       printk("Setting up standard PCI resources\n");
+       if (efi_enabled)
+               efi_initialize_iomem_resources(&code_resource, &data_resource);
+       else
+               legacy_init_iomem_resources(&code_resource, &data_resource);
+
+       /* EFI systems may still have VGA */
+       request_resource(&iomem_resource, &video_ram_resource);
+
+       /* request I/O space for devices used on all i[345]86 PCs */
+       for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
+               request_resource(&ioport_resource, &standard_io_resources[i]);
+       return 0;
+}
+
+subsys_initcall(request_standard_resources);
index 61539afbdf233b1e329b0827a99e1e86028a8058..acd2d9392abb937b3afc530d5ea08b7f362c0ed0 100644 (file)
@@ -76,11 +76,9 @@ int disable_pse __devinitdata = 0;
 /*
  * Machine setup..
  */
-
-#ifdef CONFIG_EFI
-int efi_enabled = 0;
-EXPORT_SYMBOL(efi_enabled);
-#endif
+extern struct e820map e820;
+extern struct resource code_resource;
+extern struct resource data_resource;
 
 /* cpu data as detected by the assembly code in head.S */
 struct cpuinfo_x86 new_cpu_data __initdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
@@ -134,7 +132,6 @@ struct ist_info ist_info;
        defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
 EXPORT_SYMBOL(ist_info);
 #endif
-struct e820map e820;
 
 extern void early_cpu_init(void);
 extern int root_mountflags;
@@ -149,203 +146,6 @@ static char command_line[COMMAND_LINE_SIZE];
 
 unsigned char __initdata boot_params[PARAM_SIZE];
 
-static struct resource data_resource = {
-       .name   = "Kernel data",
-       .start  = 0,
-       .end    = 0,
-       .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
-};
-
-static struct resource code_resource = {
-       .name   = "Kernel code",
-       .start  = 0,
-       .end    = 0,
-       .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
-};
-
-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
-};
-
-static struct resource video_ram_resource = {
-       .name   = "Video RAM area",
-       .start  = 0xa0000,
-       .end    = 0xbffff,
-       .flags  = IORESOURCE_BUSY | IORESOURCE_MEM
-};
-
-static struct resource standard_io_resources[] = { {
-       .name   = "dma1",
-       .start  = 0x0000,
-       .end    = 0x001f,
-       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
-}, {
-       .name   = "pic1",
-       .start  = 0x0020,
-       .end    = 0x0021,
-       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
-}, {
-       .name   = "timer0",
-       .start  = 0x0040,
-       .end    = 0x0043,
-       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
-}, {
-       .name   = "timer1",
-       .start  = 0x0050,
-       .end    = 0x0053,
-       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
-}, {
-       .name   = "keyboard",
-       .start  = 0x0060,
-       .end    = 0x006f,
-       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
-}, {
-       .name   = "dma page reg",
-       .start  = 0x0080,
-       .end    = 0x008f,
-       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
-}, {
-       .name   = "pic2",
-       .start  = 0x00a0,
-       .end    = 0x00a1,
-       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
-}, {
-       .name   = "dma2",
-       .start  = 0x00c0,
-       .end    = 0x00df,
-       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
-}, {
-       .name   = "fpu",
-       .start  = 0x00f0,
-       .end    = 0x00ff,
-       .flags  = IORESOURCE_BUSY | IORESOURCE_IO
-} };
-
-#define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
-
-static int __init romchecksum(unsigned char *rom, unsigned long length)
-{
-       unsigned char *p, sum = 0;
-
-       for (p = rom; p < rom + length; p++)
-               sum += *p;
-       return sum == 0;
-}
-
-static void __init probe_roms(void)
-{
-       unsigned long start, length, upper;
-       unsigned char *rom;
-       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;
-
-               /* 0 < length <= 0x7f * 512, historically */
-               length = rom[2] * 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;
-
-               /* 0 < length <= 0x7f * 512, historically */
-               length = rom[2] * 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;
-       }
-}
-
 static void __init limit_regions(unsigned long long size)
 {
        unsigned long long current_addr = 0;
@@ -1200,77 +1000,7 @@ void __init remapped_pgdat_init(void)
        }
 }
 
-/*
- * Request address space for all standard RAM and ROM resources
- * and also for regions reported as reserved by the e820.
- */
-static void __init
-legacy_init_iomem_resources(struct resource *code_resource, struct resource *data_resource)
-{
-       int i;
-
-       probe_roms();
-       for (i = 0; i < e820.nr_map; i++) {
-               struct resource *res;
-#ifndef CONFIG_RESOURCES_64BIT
-               if (e820.map[i].addr + e820.map[i].size > 0x100000000ULL)
-                       continue;
-#endif
-               res = kzalloc(sizeof(struct resource), GFP_ATOMIC);
-               switch (e820.map[i].type) {
-               case E820_RAM:  res->name = "System RAM"; break;
-               case E820_ACPI: res->name = "ACPI Tables"; break;
-               case E820_NVS:  res->name = "ACPI Non-volatile Storage"; break;
-               default:        res->name = "reserved";
-               }
-               res->start = e820.map[i].addr;
-               res->end = res->start + e820.map[i].size - 1;
-               res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
-               if (request_resource(&iomem_resource, res)) {
-                       kfree(res);
-                       continue;
-               }
-               if (e820.map[i].type == E820_RAM) {
-                       /*
-                        *  We don't know which RAM region contains kernel data,
-                        *  so we try it repeatedly and let the resource manager
-                        *  test it.
-                        */
-                       request_resource(res, code_resource);
-                       request_resource(res, data_resource);
-#ifdef CONFIG_KEXEC
-                       request_resource(res, &crashk_res);
-#endif
-               }
-       }
-}
-
-/*
- * Request address space for all standard resources
- *
- * This is called just before pcibios_init(), which is also a
- * subsys_initcall, but is linked in later (in arch/i386/pci/common.c).
- */
-static int __init request_standard_resources(void)
-{
-       int i;
-
-       printk("Setting up standard PCI resources\n");
-       if (efi_enabled)
-               efi_initialize_iomem_resources(&code_resource, &data_resource);
-       else
-               legacy_init_iomem_resources(&code_resource, &data_resource);
-
-       /* EFI systems may still have VGA */
-       request_resource(&iomem_resource, &video_ram_resource);
-
-       /* request I/O space for devices used on all i[345]86 PCs */
-       for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
-               request_resource(&ioport_resource, &standard_io_resources[i]);
-       return 0;
-}
 
-subsys_initcall(request_standard_resources);
 
 static void __init register_memory(void)
 {