ARM: Define CPU part numbers and implementors
authorChristoffer Dall <c.dall@virtualopensystems.com>
Tue, 18 Dec 2012 04:06:37 +0000 (04:06 +0000)
committerWill Deacon <will.deacon@arm.com>
Fri, 11 Jan 2013 14:56:30 +0000 (14:56 +0000)
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>
arch/arm/include/asm/cputype.h

index a59dcb5ab5fce4ab92f8c372248c3a482d1507dc..ad41ec2471e87e7ac5cdf71839b764532e116d06 100644 (file)
@@ -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);