| 0,0 → 1,167 |
|---|
| /* |
| * Copyright (c) 2001-2004 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup ia32 |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #include <arch/cpu.h> |
| #include <arch/cpuid.h> |
| #include <arch/pm.h> |
| |
| #include <arch.h> |
| #include <arch/types.h> |
| #include <print.h> |
| #include <fpu_context.h> |
| |
| #include <arch/smp/apic.h> |
| #include <arch/syscall.h> |
| |
| /* |
| * Identification of CPUs. |
| * Contains only non-MP-Specification specific SMP code. |
| */ |
| #define AMD_CPUID_EBX 0x68747541 |
| #define AMD_CPUID_ECX 0x444d4163 |
| #define AMD_CPUID_EDX 0x69746e65 |
| |
| #define INTEL_CPUID_EBX 0x756e6547 |
| #define INTEL_CPUID_ECX 0x6c65746e |
| #define INTEL_CPUID_EDX 0x49656e69 |
| |
| |
| enum vendor { |
| VendorUnknown = 0, |
| VendorAMD, |
| VendorIntel |
| }; |
| |
| static char *vendor_str[] = { |
| "Unknown Vendor", |
| "AMD", |
| "Intel" |
| }; |
| |
| void fpu_disable(void) |
| { |
| asm volatile ( |
| "mov %%cr0, %%eax\n" |
| "or $8, %%eax\n" |
| "mov %%eax, %%cr0\n" |
| ::: "%eax" |
| ); |
| } |
| |
| void fpu_enable(void) |
| { |
| asm volatile ( |
| "mov %%cr0, %%eax\n" |
| "and $0xffFFffF7, %%eax\n" |
| "mov %%eax,%%cr0\n" |
| ::: "%eax" |
| ); |
| } |
| |
| void cpu_arch_init(void) |
| { |
| cpuid_feature_info fi; |
| cpuid_extended_feature_info efi; |
| cpu_info_t info; |
| uint32_t help = 0; |
| |
| CPU->arch.tss = tss_p; |
| CPU->arch.tss->iomap_base = &CPU->arch.tss->iomap[0] - ((uint8_t *) CPU->arch.tss); |
| |
| CPU->fpu_owner = NULL; |
| |
| cpuid(1, &info); |
| |
| fi.word = info.cpuid_edx; |
| efi.word = info.cpuid_ecx; |
| |
| if (fi.bits.fxsr) |
| fpu_fxsr(); |
| else |
| fpu_fsr(); |
| |
| if (fi.bits.sse) { |
| asm volatile ( |
| "mov %%cr4, %[help]\n" |
| "or %[mask], %[help]\n" |
| "mov %[help], %%cr4\n" |
| : [help] "+r" (help) |
| : [mask] "i" (CR4_OSFXSR_MASK | (1 << 10)) |
| ); |
| } |
| |
| /* Setup fast SYSENTER/SYSEXIT syscalls */ |
| syscall_setup_cpu(); |
| } |
| |
| void cpu_identify(void) |
| { |
| cpu_info_t info; |
| |
| CPU->arch.vendor = VendorUnknown; |
| if (has_cpuid()) { |
| cpuid(0, &info); |
| |
| /* |
| * Check for AMD processor. |
| */ |
| if ((info.cpuid_ebx == AMD_CPUID_EBX) |
| && (info.cpuid_ecx == AMD_CPUID_ECX) |
| && (info.cpuid_edx == AMD_CPUID_EDX)) |
| CPU->arch.vendor = VendorAMD; |
| |
| /* |
| * Check for Intel processor. |
| */ |
| if ((info.cpuid_ebx == INTEL_CPUID_EBX) |
| && (info.cpuid_ecx == INTEL_CPUID_ECX) |
| && (info.cpuid_edx == INTEL_CPUID_EDX)) |
| CPU->arch.vendor = VendorIntel; |
| |
| cpuid(1, &info); |
| CPU->arch.family = (info.cpuid_eax >> 8) & 0x0f; |
| CPU->arch.model = (info.cpuid_eax >> 4) & 0x0f; |
| CPU->arch.stepping = (info.cpuid_eax >> 0) & 0x0f; |
| } |
| } |
| |
| void cpu_print_report(cpu_t* cpu) |
| { |
| printf("cpu%u: (%s family=%u model=%u stepping=%u) %" PRIu16 " MHz\n", |
| cpu->id, vendor_str[cpu->arch.vendor], cpu->arch.family, |
| cpu->arch.model, cpu->arch.stepping, cpu->frequency_mhz); |
| } |
| |
| /** @} |
| */ |