ARM: Define CPU part numbers and implementors

Define implementor IDs, part numbers and Xscale architecture versions in
cputype.h.  Also create accessor functions for reading the implementor,
part number, and Xscale architecture versions from the CPUID regiser.

Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h
index a59dcb5ab5fce4ab92f8c372248c3a482d1507dc..ad41ec2471e87e7ac5cdf71839b764532e116d06 100644 (file)
--- a/arch/arm/include/asm/cputype.h
+++ b/arch/arm/include/asm/cputype.h
@@ -64,6 +64,24 @@ extern unsigned int processor_id;
 #define read_cpuid_ext(reg) 0
 #endif
 
+#define ARM_CPU_IMP_ARM                        0x41
+#define ARM_CPU_IMP_INTEL              0x69
+
+#define ARM_CPU_PART_ARM1136           0xB360
+#define ARM_CPU_PART_ARM1156           0xB560
+#define ARM_CPU_PART_ARM1176           0xB760
+#define ARM_CPU_PART_ARM11MPCORE       0xB020
+#define ARM_CPU_PART_CORTEX_A8         0xC080
+#define ARM_CPU_PART_CORTEX_A9         0xC090
+#define ARM_CPU_PART_CORTEX_A5         0xC050
+#define ARM_CPU_PART_CORTEX_A15                0xC0F0
+#define ARM_CPU_PART_CORTEX_A7         0xC070
+
+#define ARM_CPU_XSCALE_ARCH_MASK       0xe000
+#define ARM_CPU_XSCALE_ARCH_V1         0x2000
+#define ARM_CPU_XSCALE_ARCH_V2         0x4000
+#define ARM_CPU_XSCALE_ARCH_V3         0x6000
+
 /*
  * The CPU ID never changes at run time, so we might as well tell the
  * compiler that it's constant.  Use this function to read the CPU ID
@@ -74,6 +92,21 @@ static inline unsigned int __attribute_const__ read_cpuid_id(void)
        return read_cpuid(CPUID_ID);
 }
 
+static inline unsigned int __attribute_const__ read_cpuid_implementor(void)
+{
+       return (read_cpuid_id() & 0xFF000000) >> 24;
+}
+
+static inline unsigned int __attribute_const__ read_cpuid_part_number(void)
+{
+       return read_cpuid_id() & 0xFFF0;
+}
+
+static inline unsigned int __attribute_const__ xscale_cpu_arch_version(void)
+{
+       return read_cpuid_part_number() & ARM_CPU_XSCALE_ARCH_MASK;
+}
+
 static inline unsigned int __attribute_const__ read_cpuid_cachetype(void)
 {
        return read_cpuid(CPUID_CACHETYPE);