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/* SPDX-License-Identifier: GPL-2.0-only */
#include <pci/pci.h>
#include "msrtool.h"
static struct cpuid_t id;
struct cpuid_t *cpuid(void) {
uint32_t outeax;
uint32_t outebx;
/* First, we need determine which vendor we have */
#if defined(__DARWIN__) && !defined(__LP64__)
asm volatile (
"pushl %%ebx \n"
"cpuid \n"
"popl %%ebx \n"
: "=b" (outebx) : "a" (0) : "%ecx", "%edx"
);
#else
asm ("cpuid" : "=b" (outebx) : "a" (0) : "%ecx", "%edx");
#endif
id.vendor = outebx;
/* Then, identificate CPU itself */
#if defined(__DARWIN__) && !defined(__LP64__)
asm volatile (
"pushl %%ebx \n"
"cpuid \n"
"popl %%ebx \n"
: "=a" (outeax) : "a" (1) : "%ecx", "%edx"
);
#else
asm ("cpuid" : "=a" (outeax) : "a" (1) : "%ebx", "%ecx", "%edx");
#endif
id.stepping = outeax & 0xf;
outeax >>= 4;
id.model = outeax & 0xf;
outeax >>= 4;
id.family = outeax & 0xf;
outeax >>= 8;
id.ext_model = outeax & 0xf;
outeax >>= 4;
id.ext_family = outeax & 0xff;
if ((0xf == id.family) || ((VENDOR_INTEL == id.vendor)
&& (0x6 == id.family))) {
/* Intel says always do this, AMD says only for family f */
id.model |= (id.ext_model << 4);
id.family += id.ext_family;
}
printf_verbose("CPU: family %x, model %x, stepping %x\n",
id.family, id.model, id.stepping);
return &id;
}
struct pci_dev *pci_dev_find(uint16_t vendor, uint16_t device) {
struct pci_dev *temp;
struct pci_filter filter;
pci_filter_init(NULL, &filter);
filter.vendor = vendor;
filter.device = device;
for (temp = pacc->devices; temp; temp = temp->next)
if (pci_filter_match(&filter, temp))
return temp;
return NULL;
}
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