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I8K: allow i8k driver to be built on x86_64 systems

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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>
This commit is contained in:
Bradley Smith 2008-02-07 00:16:27 -08:00 committed by Linus Torvalds
parent 9a7744f982
commit fe04f22fd2
1 changed files with 28 additions and 1 deletions
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29
drivers/char/i8k.c
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@ -113,6 +113,33 @@ static int i8k_smm(struct smm_regs *regs)
int rc; int rc;
int eax = regs->eax; 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" asm("pushl %%eax\n\t"
"movl 0(%%eax),%%edx\n\t" "movl 0(%%eax),%%edx\n\t"
"push %%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) "andl $1,%%eax\n":"=a"(rc)
: "a"(regs) : "a"(regs)
: "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory"); : "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory");
#endif
if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax) if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax)
return -EINVAL; return -EINVAL;