mirror of https://gitee.com/openkylin/linux.git
[PATCH] i386: i386 create e820.c to handle standard io/mem resources
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(-)
This commit is contained in:
bibo,mao
Andi Kleen
parent
8e3de538ee
commit
269c2d81ed
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@ -6,7 +6,7 @@ extra-y := head.o init_task.o vmlinux.lds
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obj-y := process.o signal.o entry.o traps.o irq.o \
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ptrace.o time.o ioport.o ldt.o setup.o i8259.o sys_i386.o \
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pci-dma.o i386_ksyms.o i387.o bootflag.o \
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pci-dma.o i386_ksyms.o i387.o bootflag.o e820.o\
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quirks.o i8237.o topology.o alternative.o i8253.o tsc.o
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obj-$(CONFIG_STACKTRACE) += stacktrace.o
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@ -0,0 +1,289 @@
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/bootmem.h>
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#include <linux/ioport.h>
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#include <linux/string.h>
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#include <linux/kexec.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/efi.h>
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#include <asm/pgtable.h>
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#include <asm/page.h>
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#include <asm/e820.h>
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#ifdef CONFIG_EFI
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int efi_enabled = 0;
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EXPORT_SYMBOL(efi_enabled);
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#endif
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struct e820map e820;
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struct resource data_resource = {
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.name = "Kernel data",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM
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};
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struct resource code_resource = {
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.name = "Kernel code",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM
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};
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static struct resource system_rom_resource = {
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.name = "System ROM",
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.start = 0xf0000,
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.end = 0xfffff,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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};
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static struct resource extension_rom_resource = {
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.name = "Extension ROM",
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.start = 0xe0000,
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.end = 0xeffff,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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};
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static struct resource adapter_rom_resources[] = { {
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.name = "Adapter ROM",
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.start = 0xc8000,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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}, {
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.name = "Adapter ROM",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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}, {
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.name = "Adapter ROM",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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}, {
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.name = "Adapter ROM",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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}, {
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.name = "Adapter ROM",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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}, {
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.name = "Adapter ROM",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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} };
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static struct resource video_rom_resource = {
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.name = "Video ROM",
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.start = 0xc0000,
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.end = 0xc7fff,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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};
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static struct resource video_ram_resource = {
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.name = "Video RAM area",
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.start = 0xa0000,
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.end = 0xbffff,
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM
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};
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static struct resource standard_io_resources[] = { {
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.name = "dma1",
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.start = 0x0000,
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.end = 0x001f,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "pic1",
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.start = 0x0020,
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.end = 0x0021,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "timer0",
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.start = 0x0040,
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.end = 0x0043,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "timer1",
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.start = 0x0050,
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.end = 0x0053,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "keyboard",
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.start = 0x0060,
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.end = 0x006f,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "dma page reg",
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.start = 0x0080,
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.end = 0x008f,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "pic2",
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.start = 0x00a0,
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.end = 0x00a1,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "dma2",
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.start = 0x00c0,
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.end = 0x00df,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "fpu",
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.start = 0x00f0,
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.end = 0x00ff,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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} };
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#define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
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static int __init romchecksum(unsigned char *rom, unsigned long length)
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{
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unsigned char *p, sum = 0;
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for (p = rom; p < rom + length; p++)
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sum += *p;
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return sum == 0;
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}
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static void __init probe_roms(void)
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{
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unsigned long start, length, upper;
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unsigned char *rom;
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int i;
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/* video rom */
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upper = adapter_rom_resources[0].start;
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for (start = video_rom_resource.start; start < upper; start += 2048) {
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rom = isa_bus_to_virt(start);
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if (!romsignature(rom))
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continue;
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video_rom_resource.start = start;
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/* 0 < length <= 0x7f * 512, historically */
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length = rom[2] * 512;
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/* if checksum okay, trust length byte */
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if (length && romchecksum(rom, length))
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video_rom_resource.end = start + length - 1;
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request_resource(&iomem_resource, &video_rom_resource);
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break;
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}
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start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
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if (start < upper)
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start = upper;
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/* system rom */
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request_resource(&iomem_resource, &system_rom_resource);
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upper = system_rom_resource.start;
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/* check for extension rom (ignore length byte!) */
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rom = isa_bus_to_virt(extension_rom_resource.start);
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if (romsignature(rom)) {
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length = extension_rom_resource.end - extension_rom_resource.start + 1;
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if (romchecksum(rom, length)) {
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request_resource(&iomem_resource, &extension_rom_resource);
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upper = extension_rom_resource.start;
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}
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}
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/* check for adapter roms on 2k boundaries */
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for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper; start += 2048) {
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rom = isa_bus_to_virt(start);
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if (!romsignature(rom))
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continue;
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/* 0 < length <= 0x7f * 512, historically */
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length = rom[2] * 512;
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/* but accept any length that fits if checksum okay */
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if (!length || start + length > upper || !romchecksum(rom, length))
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continue;
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adapter_rom_resources[i].start = start;
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adapter_rom_resources[i].end = start + length - 1;
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request_resource(&iomem_resource, &adapter_rom_resources[i]);
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start = adapter_rom_resources[i++].end & ~2047UL;
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}
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}
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/*
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* Request address space for all standard RAM and ROM resources
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* and also for regions reported as reserved by the e820.
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*/
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static void __init
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legacy_init_iomem_resources(struct resource *code_resource, struct resource *data_resource)
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{
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int i;
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probe_roms();
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for (i = 0; i < e820.nr_map; i++) {
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struct resource *res;
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#ifndef CONFIG_RESOURCES_64BIT
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if (e820.map[i].addr + e820.map[i].size > 0x100000000ULL)
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continue;
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#endif
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res = kzalloc(sizeof(struct resource), GFP_ATOMIC);
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switch (e820.map[i].type) {
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case E820_RAM: res->name = "System RAM"; break;
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case E820_ACPI: res->name = "ACPI Tables"; break;
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case E820_NVS: res->name = "ACPI Non-volatile Storage"; break;
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default: res->name = "reserved";
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}
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res->start = e820.map[i].addr;
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res->end = res->start + e820.map[i].size - 1;
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res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
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if (request_resource(&iomem_resource, res)) {
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kfree(res);
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continue;
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}
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if (e820.map[i].type == E820_RAM) {
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/*
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* We don't know which RAM region contains kernel data,
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* so we try it repeatedly and let the resource manager
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* test it.
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*/
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request_resource(res, code_resource);
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request_resource(res, data_resource);
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#ifdef CONFIG_KEXEC
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request_resource(res, &crashk_res);
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#endif
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}
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}
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}
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/*
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* Request address space for all standard resources
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*
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* This is called just before pcibios_init(), which is also a
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* subsys_initcall, but is linked in later (in arch/i386/pci/common.c).
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*/
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static int __init request_standard_resources(void)
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{
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int i;
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printk("Setting up standard PCI resources\n");
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if (efi_enabled)
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efi_initialize_iomem_resources(&code_resource, &data_resource);
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else
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legacy_init_iomem_resources(&code_resource, &data_resource);
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/* EFI systems may still have VGA */
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request_resource(&iomem_resource, &video_ram_resource);
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/* request I/O space for devices used on all i[345]86 PCs */
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for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
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request_resource(&ioport_resource, &standard_io_resources[i]);
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return 0;
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}
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subsys_initcall(request_standard_resources);
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@ -76,11 +76,9 @@ int disable_pse __devinitdata = 0;
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/*
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* Machine setup..
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*/
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#ifdef CONFIG_EFI
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int efi_enabled = 0;
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EXPORT_SYMBOL(efi_enabled);
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#endif
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extern struct e820map e820;
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extern struct resource code_resource;
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extern struct resource data_resource;
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/* cpu data as detected by the assembly code in head.S */
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struct cpuinfo_x86 new_cpu_data __initdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
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@ -134,7 +132,6 @@ struct ist_info ist_info;
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defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
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EXPORT_SYMBOL(ist_info);
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#endif
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struct e820map e820;
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extern void early_cpu_init(void);
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extern int root_mountflags;
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@ -149,203 +146,6 @@ static char command_line[COMMAND_LINE_SIZE];
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unsigned char __initdata boot_params[PARAM_SIZE];
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static struct resource data_resource = {
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.name = "Kernel data",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM
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};
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static struct resource code_resource = {
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.name = "Kernel code",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM
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};
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static struct resource system_rom_resource = {
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.name = "System ROM",
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.start = 0xf0000,
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.end = 0xfffff,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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};
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static struct resource extension_rom_resource = {
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.name = "Extension ROM",
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.start = 0xe0000,
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.end = 0xeffff,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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};
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static struct resource adapter_rom_resources[] = { {
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.name = "Adapter ROM",
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.start = 0xc8000,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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}, {
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.name = "Adapter ROM",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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}, {
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.name = "Adapter ROM",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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}, {
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.name = "Adapter ROM",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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}, {
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.name = "Adapter ROM",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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}, {
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.name = "Adapter ROM",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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} };
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static struct resource video_rom_resource = {
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.name = "Video ROM",
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.start = 0xc0000,
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.end = 0xc7fff,
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.flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
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};
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static struct resource video_ram_resource = {
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.name = "Video RAM area",
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.start = 0xa0000,
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.end = 0xbffff,
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM
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};
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static struct resource standard_io_resources[] = { {
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.name = "dma1",
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.start = 0x0000,
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.end = 0x001f,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "pic1",
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.start = 0x0020,
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.end = 0x0021,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "timer0",
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.start = 0x0040,
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.end = 0x0043,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "timer1",
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.start = 0x0050,
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.end = 0x0053,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "keyboard",
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.start = 0x0060,
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.end = 0x006f,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "dma page reg",
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.start = 0x0080,
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.end = 0x008f,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "pic2",
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.start = 0x00a0,
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.end = 0x00a1,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "dma2",
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.start = 0x00c0,
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.end = 0x00df,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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}, {
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.name = "fpu",
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.start = 0x00f0,
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.end = 0x00ff,
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.flags = IORESOURCE_BUSY | IORESOURCE_IO
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} };
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#define romsignature(x) (*(unsigned short *)(x) == 0xaa55)
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static int __init romchecksum(unsigned char *rom, unsigned long length)
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{
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unsigned char *p, sum = 0;
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for (p = rom; p < rom + length; p++)
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sum += *p;
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return sum == 0;
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}
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static void __init probe_roms(void)
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{
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unsigned long start, length, upper;
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unsigned char *rom;
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int i;
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/* 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)
|
||||
{
|
||||
|
|
|
|||
Loading…
Reference in New Issue