cpuid: Adding cpuid to detect x86 CPU information and features.

kernel/arch/include/x86/cpuid.h

@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2009 Renê de Souza Pinto
+ * Tempos - Tempos is an Educational and multi purpose Operating System
+ *
+ * File: cpuid.h
+ * Written by: Julio Faracco
+ * This file is part of TempOS.
+ *
+ * TempOS is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * TempOS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef CPU_H
+
+        #define CPU_H
+
+        #include <unistd.h>
+
+	#define NCAPINTS		19	/* N 32-bit words worth of info */
+	#define NBUGINTS		1	/* N 32-bit bug flags */
+
+	/* CPU Vendor-strings. */
+	#define CPUID_VENDOR_OLDAMD       "AMDisbetter!" /* early engineering samples of AMD K5 processor */
+	#define CPUID_VENDOR_AMD          "AuthenticAMD"
+	#define CPUID_VENDOR_INTEL        "GenuineIntel"
+	#define CPUID_VENDOR_CENTAUR      "CentaurHauls"
+	#define CPUID_VENDOR_OLDTRANSMETA "TransmetaCPU"
+	#define CPUID_VENDOR_TRANSMETA    "GenuineTMx86"
+	#define CPUID_VENDOR_CYRIX        "CyrixInstead"
+	#define CPUID_VENDOR_CENTAUR      "CentaurHauls"
+	#define CPUID_VENDOR_NEXGEN       "NexGenDriven"
+	#define CPUID_VENDOR_UMC          "UMC UMC UMC "
+	#define CPUID_VENDOR_SIS          "SiS SiS SiS "
+	#define CPUID_VENDOR_NSC          "Geode by NSC"
+	#define CPUID_VENDOR_RISE         "RiseRiseRise"
+	#define CPUID_VENDOR_VORTEX       "Vortex86 SoC"
+	#define CPUID_VENDOR_VIA          "VIA VIA VIA "
+
+	/* CPU Vendor-strings from Virtual Machines.*/
+	#define CPUID_VENDOR_KVM	  "KVMKVMKVM"
+	#define CPUID_VENDOR_VMWARE       "VMwareVMware"
+	#define CPUID_VENDOR_XENHVM       "XenVMMXenVMM"
+	#define CPUID_VENDOR_MICROSOFT_HV "Microsoft Hv"
+	#define CPUID_VENDOR_PARALLELS    " lrpepyh vr"
+	#define CPUID_VENDOR_BHYVE	  "bhyve bhyve "
+
+	enum cpuid_leafs {
+		CPUID_1_EDX=0,
+		CPUID_8000_0001_EDX,
+		CPUID_8086_0001_EDX,
+		CPUID_LNX_1,
+		CPUID_1_ECX,
+		CPUID_C000_0001_EDX,
+		CPUID_8000_0001_ECX,
+		CPUID_LNX_2,
+		CPUID_LNX_3,
+
+		CPUID_7_0_EBX,
+		CPUID_D_1_EAX,
+		CPUID_F_0_EDX,
+		CPUID_F_1_EDX,
+		CPUID_8000_0008_EBX,
+
+		CPUID_6_EAX,
+		CPUID_8000_000A_EDX,
+		CPUID_7_ECX,
+		CPUID_8000_0007_EBX,
+		CPUID_7_EDX,
+	};
+
+	enum cpuid_requests {
+		CPUID_GETVENDORSTRING=0,
+		CPUID_GETFEATURES,
+		CPUID_GETTLB,
+		CPUID_GETSERIAL,
+		CPUID_ADDITIONALCACHE,
+		CPUID_MWAIT,
+		CPUID_GETPOWER,
+		CPUID_INTELADDITIONAL,
+
+		CPUID_EXTENDED=0x80000000,
+		CPUID_FEATURES,
+		CPUID_BRANDSTRING,
+		CPUID_BRANDSTRINGMORE,
+		CPUID_BRANDSTRINGEND,
+		CPUID_L1TLB,
+		CPUID_EXTENDEDL2,
+		CPUID_ADVANCEDPOWER,
+		CPUID_VIRTPHYADDR
+	};
+
+	struct cpuinfo_x86 {
+		uchar8_t		x86;		/* CPU family */
+		uchar8_t		x86_vendor;	/* CPU vendor */
+		uchar8_t		x86_model;	/* CPU model */
+		uchar8_t		x86_stepping;
+		/* Number of 4K pages in DTLB/ITLB combined(in pages): */
+		/* For 64 bits processors. */
+		//int			x86_tlbsize;
+		uchar8_t		x86_virt_bits;
+		uchar8_t		x86_phys_bits;
+		uchar8_t		x86_coreid_bits;
+		uchar8_t		cu_id;
+		uint32_t		extended_cpuid_level;
+		int			cpuid_level;
+		uint32_t		x86_capability[NCAPINTS + NBUGINTS];
+		char                    x86_vendor_id[16];
+		char                    x86_model_id[64];
+		unsigned int            x86_cache_size;
+		int			x86_cache_alignment;
+		int			x86_power;
+		uint16_t		x86_clflush_size;
+	};
+
+	int cpuid (uint32_t leaf, uint32_t *eax, uint32_t *ebx,
+		   uint32_t *ecx, uint32_t *edx);
+
+	int cpuid_count (uint32_t leaf, uint32_t subleaf,
+ 			 uint32_t *eax, uint32_t *ebx,
+			 uint32_t *ecx, uint32_t *edx);
+
+	void cpuinfo(void);
+
+#endif /* CPU_H */

kernel/arch/x86/Build.mk

@@ -5,7 +5,7 @@
 # TBS - Build configuration file
 #
 
-obj-y += exceptions.o gdt.o idt.o io.o dump_cpu.o
+obj-y += exceptions.o gdt.o idt.o io.o dump_cpu.o cpuid.o
 
 obj-x86asm += isr.o task.o