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Date: Sun, 28 Oct 2007 17:25:19 +0000
From: Bradley Smith <bradjsmith@...nternet.com>
To: linux-kernel@...r.kernel.org, dz@...ian.org
Subject: [PATCH 1/2] I8K: Allow i8k driver to be built on x86_64 systems
From: Bradley Smith <bradjsmith@...nternet.com>
Adds #if clause and additional inline assembly so that the driver
builds on x86_64 systems.
Signed-off-by: Bradley Smith <bradjsmith@...nternet.com>
---
--- linux-2.6/drivers/char/i8k.c.orig 2007-10-28 12:27:34.000000000 +0000
+++ linux-2.6/drivers/char/i8k.c 2007-10-28 14:27:56.000000000 +0000
@@ -113,6 +113,33 @@ static int i8k_smm(struct smm_regs *regs
int rc;
int eax = regs->eax;
+#if defined(__x86_64__)
+ asm("pushq %%rax\n\t"
+ "movl 0(%%rax),%%edx\n\t"
+ "pushq %%rdx\n\t"
+ "movl 4(%%rax),%%ebx\n\t"
+ "movl 8(%%rax),%%ecx\n\t"
+ "movl 12(%%rax),%%edx\n\t"
+ "movl 16(%%rax),%%esi\n\t"
+ "movl 20(%%rax),%%edi\n\t"
+ "popq %%rax\n\t"
+ "out %%al,$0xb2\n\t"
+ "out %%al,$0x84\n\t"
+ "xchgq %%rax,(%%rsp)\n\t"
+ "movl %%ebx,4(%%rax)\n\t"
+ "movl %%ecx,8(%%rax)\n\t"
+ "movl %%edx,12(%%rax)\n\t"
+ "movl %%esi,16(%%rax)\n\t"
+ "movl %%edi,20(%%rax)\n\t"
+ "popq %%rdx\n\t"
+ "movl %%edx,0(%%rax)\n\t"
+ "lahf\n\t"
+ "shrl $8,%%eax\n\t"
+ "andl $1,%%eax\n"
+ :"=a"(rc)
+ : "a"(regs)
+ : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory");
+#else
asm("pushl %%eax\n\t"
"movl 0(%%eax),%%edx\n\t"
"push %%edx\n\t"
@@ -137,7 +164,7 @@ static int i8k_smm(struct smm_regs *regs
"andl $1,%%eax\n":"=a"(rc)
: "a"(regs)
: "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory");
-
+#endif
if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax)
return -EINVAL;
-
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