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authorBradley Smith <bradjsmith@btinternet.com>2008-02-07 00:16:27 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 08:42:33 -0800
commitfe04f22fd2bc84dfcc0ef1c7acb863bd98b9ac93 (patch)
tree8e0af562cd03fd5bfef643c9bdd98c23a72f5e7b /drivers/char
parent9a7744f9823b9ddf14c47c475e81c1326b1a2787 (diff)
I8K: allow i8k driver to be built on x86_64 systems
Adds #if clause and additional inline assembly so that the driver builds on x86_64 systems. Signed-off-by: Bradley Smith <bradjsmith@btinternet.com> Cc: Frank Sorenson <frank@tuxrocks.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/i8k.c29
1 files changed, 28 insertions, 1 deletions
diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c
index 179223a1741..3d181021a86 100644
--- a/drivers/char/i8k.c
+++ b/drivers/char/i8k.c
@@ -113,6 +113,33 @@ static int i8k_smm(struct smm_regs *regs)
int rc;
int eax = regs->eax;
+#if defined(CONFIG_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;