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/*
* (C) 2003 Bruno Ducrot
* (C) 2004 Dominik Brodowski <linux@dominikbrodowski.de>
*
* Licensed under the terms of the GNU GPL License version 2.
*
* Based on code found in
* linux/include/asm-i386/ist.h and linux/arch/i386/kernel/setup.c
* and originally developed by Andy Grover <andrew.grover@intel.com>
*/
#include <stdio.h>
#include <string.h>
#include <lrmi.h>
int main (void)
{
struct LRMI_regs r;
int retval;
if (!LRMI_init())
return 0;
memset(&r, 0, sizeof(r));
r.eax = 0x0000E980;
r.edx = 0x47534943;
retval = LRMI_int(0x15, &r);
if (!retval) {
printf("Failed!\n");
return 0;
}
if (r.eax == 0x47534943) {
printf("BIOS supports GSIC call:\n");
printf("\tsignature: %c%c%c%c\n",
(r.eax >> 24) & 0xff,
(r.eax >> 16) & 0xff,
(r.eax >> 8) & 0xff,
(r.eax) & 0xff);
printf("\tcommand port = 0x%.4x\n",
r.ebx & 0xffff);
printf("\tcommand = 0x%.4x\n",
(r.ebx >> 16) & 0xffff);
printf("\tevent port = 0x%.8x\n", r.ecx);
printf("\tflags = 0x%.8x\n", r.edx);
if (((r.ebx >> 16) & 0xffff) != 0x82) {
printf("non-default command value. If speedstep-smi "
"doesn't work out of the box,\nyou may want to "
"try out the default value by passing "
"smi_cmd=0x82 to the module\n ON YOUR OWN "
"RISK.\n");
}
if ((r.ebx & 0xffff) != 0xb2) {
printf("non-default command port. If speedstep-smi "
"doesn't work out of the box,\nyou may want to "
"try out the default value by passing "
"smi_port=0x82 to the module\n ON YOUR OWN "
"RISK.\n");
}
} else {
printf("BIOS DOES NOT support GSIC call. Dumping registers anyway:\n");
printf("eax = 0x%.8x\n", r.eax);
printf("ebx = 0x%.8x\n", r.ebx);
printf("ecx = 0x%.8x\n", r.ecx);
printf("edx = 0x%.8x\n", r.edx);
printf("Note also that some BIOS do not support the initial "
"GSIC call, but the newer\nspeedstep-smi driver may "
"work.\nFor this, you need to pass some arguments to "
"the speedstep-smi driver:\n");
printf("\tsmi_cmd=0x?? smi_port=0x?? smi_sig=1\n");
printf("\nUnfortunately, you have to know what exactly are "
"smi_cmd and smi_port, and this\nis system "
"dependant.\n");
}
return 1;
}
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