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/*
* libcaca Colour ASCII-Art library
* Copyright (c) 2006 Sam Hocevar <sam@hocevar.net>
* 2009 Jean-Yves Lamoureux <jylam@lnxscene.org>
* All Rights Reserved
*
* This library is free software. It comes without any warranty, to
* the extent permitted by applicable law. You can redistribute it
* and/or modify it under the terms of the Do What the Fuck You Want
* to Public License, Version 2, as published by Sam Hocevar. See
* http://www.wtfpl.net/ for more details.
*/
#include "kernel.h"
#include "klibc.h"
#include "drivers/timer.h"
#include "processor.h"
int processor_get_info(struct processor_info *processor_info)
{
processor_info->id = 0;
/* Vendor String */
int code = CPUID_GETVENDORSTRING;
unsigned int where[5];
char *s;
asm volatile ("cpuid":"=a" (*where), "=b"(*(where + 1)),
"=c"(*(where + 2)), "=d"(*(where + 3)):"0"(code));
s = (char *)where;
unsigned int a = 0;
unsigned int b = where[1];
unsigned int d = where[3];
unsigned int c = where[2];
where[0] = b;
where[1] = d;
where[2] = c;
where[3] = 0;
memcpy(processor_info->vendor, where, 13);
/* Features */
code = CPUID_GETFEATURES;
asm volatile ("cpuid":"=a" (a), "=d"(d):"0"(code):"ecx", "ebx");
processor_info->features = a;
processor_info->frequency = 0;
processor_info->frequency = processor_get_frequency(processor_info);
return 0;
}
u32 processor_get_frequency(struct processor_info * processor_info)
{
if (processor_info->frequency)
return processor_info->frequency;
u64 srdtsc64, erdtsc64;
u32 srdtsc_l, srdtsc_h;
u32 erdtsc_l, erdtsc_h;
rdtsc(srdtsc_l, srdtsc_h); /* Get RDTSC */
sleep(2); /* Sleep for 2 seconds */
rdtsc(erdtsc_l, erdtsc_h); /* Get RDTSC again */
srdtsc64 = srdtsc_h;
srdtsc64 <<= 32;
srdtsc64 |= srdtsc_l;
erdtsc64 = erdtsc_h;
erdtsc64 <<= 32;
erdtsc64 |= erdtsc_l;
u32 diff = erdtsc64 - srdtsc64; /* Cycle count for 2 seconds */
diff /= 2; /* Divide by 2 to get cycles per sec */
return diff;
}
void processor_print_info(struct processor_info *processor_info)
{
printf("CPU%d\n", processor_info->id);
printf("Vendor ID : %s\n", processor_info->vendor);
printf("Frequency : ");
if (processor_info->frequency > 1000000000)
{
printf("%dGhz",
processor_info->frequency / 1000000000);
}
else if (processor_info->frequency > 1000000)
{
printf("%dMhz",
processor_info->frequency / 1000000);
}
else if (processor_info->frequency > 1000)
{
printf("%dKhz\n",
processor_info->frequency / 1000);
}
else
{
printf("%dhz\n",
processor_info->frequency);
}
printf(" (or something like that)\n");
printf("Features : 0x%x\n", processor_info->features);
}
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