From: Thomas Gleixner <tglx@linutronix.de> Date: Thu, 11 Oct 2007 09:15:19 +0000 (+0200) Subject: x86_64: prepare shared kernel/verify_cpu.S X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e0a84f689b4373cbaa6d3a5bc5c52a613005fed1;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git x86_64: prepare shared kernel/verify_cpu.S Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> --- diff --git a/arch/x86_64/boot/compressed/head.S b/arch/x86_64/boot/compressed/head.S index 9fd8030cc54f..49467640751f 100644 --- a/arch/x86_64/boot/compressed/head.S +++ b/arch/x86_64/boot/compressed/head.S @@ -174,7 +174,7 @@ no_longmode: hlt jmp 1b -#include "../../kernel/verify_cpu.S" +#include "../../kernel/verify_cpu_64.S" /* Be careful here startup_64 needs to be at a predictable * address so I can export it in an ELF header. Bootloaders diff --git a/arch/x86_64/kernel/acpi/wakeup.S b/arch/x86_64/kernel/acpi/wakeup.S index a06f2bcabef9..8b4357e1efe0 100644 --- a/arch/x86_64/kernel/acpi/wakeup.S +++ b/arch/x86_64/kernel/acpi/wakeup.S @@ -269,7 +269,7 @@ no_longmode: movb $0xbc,%al ; outb %al,$0x80 jmp no_longmode -#include "../verify_cpu.S" +#include "../verify_cpu_64.S" /* This code uses an extended set of video mode numbers. These include: * Aliases for standard modes diff --git a/arch/x86_64/kernel/trampoline_64.S b/arch/x86_64/kernel/trampoline_64.S index e7e2764c461b..607983b0d27b 100644 --- a/arch/x86_64/kernel/trampoline_64.S +++ b/arch/x86_64/kernel/trampoline_64.S @@ -126,7 +126,7 @@ startup_64: no_longmode: hlt jmp no_longmode -#include "verify_cpu.S" +#include "verify_cpu_64.S" # Careful these need to be in the same 64K segment as the above; tidt: diff --git a/arch/x86_64/kernel/verify_cpu.S b/arch/x86_64/kernel/verify_cpu.S deleted file mode 100644 index 45b6f8a975a1..000000000000 --- a/arch/x86_64/kernel/verify_cpu.S +++ /dev/null @@ -1,105 +0,0 @@ -/* - * - * verify_cpu.S - Code for cpu long mode and SSE verification. This - * code has been borrowed from boot/setup.S and was introduced by - * Andi Kleen. - * - * Copyright (c) 2007 Andi Kleen (ak@suse.de) - * Copyright (c) 2007 Eric Biederman (ebiederm@xmission.com) - * Copyright (c) 2007 Vivek Goyal (vgoyal@in.ibm.com) - * - * This source code is licensed under the GNU General Public License, - * Version 2. See the file COPYING for more details. - * - * This is a common code for verification whether CPU supports - * long mode and SSE or not. It is not called directly instead this - * file is included at various places and compiled in that context. - * Following are the current usage. - * - * This file is included by both 16bit and 32bit code. - * - * arch/x86_64/boot/setup.S : Boot cpu verification (16bit) - * arch/x86_64/boot/compressed/head.S: Boot cpu verification (32bit) - * arch/x86_64/kernel/trampoline.S: secondary processor verfication (16bit) - * arch/x86_64/kernel/acpi/wakeup.S:Verfication at resume (16bit) - * - * verify_cpu, returns the status of cpu check in register %eax. - * 0: Success 1: Failure - * - * The caller needs to check for the error code and take the action - * appropriately. Either display a message or halt. - */ - -#include <asm/cpufeature.h> - -verify_cpu: - pushfl # Save caller passed flags - pushl $0 # Kill any dangerous flags - popfl - - pushfl # standard way to check for cpuid - popl %eax - movl %eax,%ebx - xorl $0x200000,%eax - pushl %eax - popfl - pushfl - popl %eax - cmpl %eax,%ebx - jz verify_cpu_no_longmode # cpu has no cpuid - - movl $0x0,%eax # See if cpuid 1 is implemented - cpuid - cmpl $0x1,%eax - jb verify_cpu_no_longmode # no cpuid 1 - - xor %di,%di - cmpl $0x68747541,%ebx # AuthenticAMD - jnz verify_cpu_noamd - cmpl $0x69746e65,%edx - jnz verify_cpu_noamd - cmpl $0x444d4163,%ecx - jnz verify_cpu_noamd - mov $1,%di # cpu is from AMD - -verify_cpu_noamd: - movl $0x1,%eax # Does the cpu have what it takes - cpuid - andl $REQUIRED_MASK0,%edx - xorl $REQUIRED_MASK0,%edx - jnz verify_cpu_no_longmode - - movl $0x80000000,%eax # See if extended cpuid is implemented - cpuid - cmpl $0x80000001,%eax - jb verify_cpu_no_longmode # no extended cpuid - - movl $0x80000001,%eax # Does the cpu have what it takes - cpuid - andl $REQUIRED_MASK1,%edx - xorl $REQUIRED_MASK1,%edx - jnz verify_cpu_no_longmode - -verify_cpu_sse_test: - movl $1,%eax - cpuid - andl $SSE_MASK,%edx - cmpl $SSE_MASK,%edx - je verify_cpu_sse_ok - test %di,%di - jz verify_cpu_no_longmode # only try to force SSE on AMD - movl $0xc0010015,%ecx # HWCR - rdmsr - btr $15,%eax # enable SSE - wrmsr - xor %di,%di # don't loop - jmp verify_cpu_sse_test # try again - -verify_cpu_no_longmode: - popfl # Restore caller passed flags - movl $1,%eax - ret -verify_cpu_sse_ok: - popfl # Restore caller passed flags - xorl %eax, %eax - ret diff --git a/arch/x86_64/kernel/verify_cpu_64.S b/arch/x86_64/kernel/verify_cpu_64.S new file mode 100644 index 000000000000..45b6f8a975a1 --- /dev/null +++ b/arch/x86_64/kernel/verify_cpu_64.S @@ -0,0 +1,105 @@ +/* + * + * verify_cpu.S - Code for cpu long mode and SSE verification. This + * code has been borrowed from boot/setup.S and was introduced by + * Andi Kleen. + * + * Copyright (c) 2007 Andi Kleen (ak@suse.de) + * Copyright (c) 2007 Eric Biederman (ebiederm@xmission.com) + * Copyright (c) 2007 Vivek Goyal (vgoyal@in.ibm.com) + * + * This source code is licensed under the GNU General Public License, + * Version 2. See the file COPYING for more details. + * + * This is a common code for verification whether CPU supports + * long mode and SSE or not. It is not called directly instead this + * file is included at various places and compiled in that context. + * Following are the current usage. + * + * This file is included by both 16bit and 32bit code. + * + * arch/x86_64/boot/setup.S : Boot cpu verification (16bit) + * arch/x86_64/boot/compressed/head.S: Boot cpu verification (32bit) + * arch/x86_64/kernel/trampoline.S: secondary processor verfication (16bit) + * arch/x86_64/kernel/acpi/wakeup.S:Verfication at resume (16bit) + * + * verify_cpu, returns the status of cpu check in register %eax. + * 0: Success 1: Failure + * + * The caller needs to check for the error code and take the action + * appropriately. Either display a message or halt. + */ + +#include <asm/cpufeature.h> + +verify_cpu: + pushfl # Save caller passed flags + pushl $0 # Kill any dangerous flags + popfl + + pushfl # standard way to check for cpuid + popl %eax + movl %eax,%ebx + xorl $0x200000,%eax + pushl %eax + popfl + pushfl + popl %eax + cmpl %eax,%ebx + jz verify_cpu_no_longmode # cpu has no cpuid + + movl $0x0,%eax # See if cpuid 1 is implemented + cpuid + cmpl $0x1,%eax + jb verify_cpu_no_longmode # no cpuid 1 + + xor %di,%di + cmpl $0x68747541,%ebx # AuthenticAMD + jnz verify_cpu_noamd + cmpl $0x69746e65,%edx + jnz verify_cpu_noamd + cmpl $0x444d4163,%ecx + jnz verify_cpu_noamd + mov $1,%di # cpu is from AMD + +verify_cpu_noamd: + movl $0x1,%eax # Does the cpu have what it takes + cpuid + andl $REQUIRED_MASK0,%edx + xorl $REQUIRED_MASK0,%edx + jnz verify_cpu_no_longmode + + movl $0x80000000,%eax # See if extended cpuid is implemented + cpuid + cmpl $0x80000001,%eax + jb verify_cpu_no_longmode # no extended cpuid + + movl $0x80000001,%eax # Does the cpu have what it takes + cpuid + andl $REQUIRED_MASK1,%edx + xorl $REQUIRED_MASK1,%edx + jnz verify_cpu_no_longmode + +verify_cpu_sse_test: + movl $1,%eax + cpuid + andl $SSE_MASK,%edx + cmpl $SSE_MASK,%edx + je verify_cpu_sse_ok + test %di,%di + jz verify_cpu_no_longmode # only try to force SSE on AMD + movl $0xc0010015,%ecx # HWCR + rdmsr + btr $15,%eax # enable SSE + wrmsr + xor %di,%di # don't loop + jmp verify_cpu_sse_test # try again + +verify_cpu_no_longmode: + popfl # Restore caller passed flags + movl $1,%eax + ret +verify_cpu_sse_ok: + popfl # Restore caller passed flags + xorl %eax, %eax + ret