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