Implemented basics of the architecture specific get_system_info(), also

added get_cpuid() function (does not respect the cpu parameter yet).


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10314 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kernel/core/arch/x86/Jamfile

@@ -19,6 +19,7 @@ KernelStaticLibrary libx86 :
 	arch_vm_translation_map.c
 	arch_x86.S
 	arch_interrupts.S
+	arch_system_info.c
 	bios.cpp
 	:
 	-fno-pic -Wno-unused

src/kernel/core/arch/x86/arch_system_info.c

@@ -0,0 +1,99 @@
+/*
+ * Copyright 2004, Axel Dörfler, [email protected]. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include <OS.h>
+#include <arch/system_info.h>
+#include <boot/kernel_args.h>
+
+#include <string.h>
+
+
+extern void cpuid(uint32 selector, cpuid_info *info);
+extern uint32 cv_factor;
+
+
+cpu_type sCpuType;
+int32 sCpuRevision;
+int64 sCpuClockSpeed;
+
+
+status_t
+get_cpuid(cpuid_info *info, uint32 eax_register, uint32 cpu_num)
+{
+	// ToDo: cpu_num is ignored, we should use the call_all_cpus() function
+	//		to fix this.
+
+	cpuid(eax_register, info);
+
+	if (eax_register == 0) {
+		// fixups for this special case
+		char *vendor = info->eax_0.vendorid;
+		uint32 data[4];
+
+		memcpy(data, info, sizeof(uint32) * 4);
+
+		// the high-order word is non-zero on some Cyrix CPUs
+		info->eax_0.max_eax = data[0] & 0xffff;
+
+		// the vendor string bytes need a little re-ordering
+		*((uint32 *)&vendor[0]) = data[1];
+		*((uint32 *)&vendor[4]) = data[3];
+		*((uint32 *)&vendor[8]) = data[2];
+	}
+
+	return B_OK;
+}
+
+
+status_t
+arch_get_system_info(system_info *info, size_t size)
+{
+	info->cpu_type = sCpuType;
+	info->cpu_revision = sCpuRevision;
+
+	// - various cpu_info
+	info->cpu_clock_speed = sCpuClockSpeed;
+	// - bus_clock_speed
+	info->platform_type = B_AT_CLONE_PLATFORM;
+
+	// ToDo: clock speeds could be retrieved via SMBIOS/DMI
+	return B_OK;
+}
+
+
+status_t
+arch_system_info_init(struct kernel_args *args)
+{
+	cpuid_info cpuInfo;
+	if (get_cpuid(&cpuInfo, 0, 0) == B_OK) {
+		int32 base;
+
+		// set CPU type and revision
+
+		if (!strncmp(cpuInfo.eax_0.vendorid, "GenuineIntel", 12))
+			base = B_CPU_INTEL_X86;
+		else if (!strncmp(cpuInfo.eax_0.vendorid, "AuthenticAMD", 12))
+			base = B_CPU_AMD_X86;
+		else {
+			// ToDo: fix me, add Transmeta, VIA, ...!
+			base = B_CPU_INTEL_X86;
+		}
+
+		get_cpuid(&cpuInfo, 1, 0);
+
+		sCpuType = base + cpuInfo.eax_1.model + (cpuInfo.eax_1.family << 4);
+		sCpuRevision = (cpuInfo.eax_1.type << 12)
+			| (cpuInfo.eax_1.family << 8)
+			| (cpuInfo.eax_1.model << 4)
+			| cpuInfo.eax_1.stepping;
+	} else {
+		sCpuType = B_CPU_INTEL_X86;
+	}
+
+	sCpuClockSpeed = args->arch_args.cpu_clock_speed;
+	return B_OK;
+}
+