ipv6: fix race condition regarding dst->expires and dst->from.
[pandora-kernel.git] / arch / arm / include / asm / cputype.h
1 #ifndef __ASM_ARM_CPUTYPE_H
2 #define __ASM_ARM_CPUTYPE_H
3
4 #include <linux/stringify.h>
5 #include <linux/kernel.h>
6
7 #define CPUID_ID        0
8 #define CPUID_CACHETYPE 1
9 #define CPUID_TCM       2
10 #define CPUID_TLBTYPE   3
11 #define CPUID_MPIDR     5
12
13 #define CPUID_EXT_PFR0  "c1, 0"
14 #define CPUID_EXT_PFR1  "c1, 1"
15 #define CPUID_EXT_DFR0  "c1, 2"
16 #define CPUID_EXT_AFR0  "c1, 3"
17 #define CPUID_EXT_MMFR0 "c1, 4"
18 #define CPUID_EXT_MMFR1 "c1, 5"
19 #define CPUID_EXT_MMFR2 "c1, 6"
20 #define CPUID_EXT_MMFR3 "c1, 7"
21 #define CPUID_EXT_ISAR0 "c2, 0"
22 #define CPUID_EXT_ISAR1 "c2, 1"
23 #define CPUID_EXT_ISAR2 "c2, 2"
24 #define CPUID_EXT_ISAR3 "c2, 3"
25 #define CPUID_EXT_ISAR4 "c2, 4"
26 #define CPUID_EXT_ISAR5 "c2, 5"
27
28 #define MPIDR_SMP_BITMASK (0x3 << 30)
29 #define MPIDR_SMP_VALUE (0x2 << 30)
30
31 #define MPIDR_MT_BITMASK (0x1 << 24)
32
33 #define MPIDR_HWID_BITMASK 0xFFFFFF
34
35 #define MPIDR_LEVEL_BITS 8
36 #define MPIDR_LEVEL_MASK ((1 << MPIDR_LEVEL_BITS) - 1)
37
38 #define MPIDR_AFFINITY_LEVEL(mpidr, level) \
39         ((mpidr >> (MPIDR_LEVEL_BITS * level)) & MPIDR_LEVEL_MASK)
40
41 extern unsigned int processor_id;
42
43 #ifdef CONFIG_CPU_CP15
44 #define read_cpuid(reg)                                                 \
45         ({                                                              \
46                 unsigned int __val;                                     \
47                 asm("mrc        p15, 0, %0, c0, c0, " __stringify(reg)  \
48                     : "=r" (__val)                                      \
49                     :                                                   \
50                     : "cc");                                            \
51                 __val;                                                  \
52         })
53 #define read_cpuid_ext(ext_reg)                                         \
54         ({                                                              \
55                 unsigned int __val;                                     \
56                 asm("mrc        p15, 0, %0, c0, " ext_reg               \
57                     : "=r" (__val)                                      \
58                     :                                                   \
59                     : "cc");                                            \
60                 __val;                                                  \
61         })
62 #else
63 #define read_cpuid(reg) (processor_id)
64 #define read_cpuid_ext(reg) 0
65 #endif
66
67 /*
68  * The CPU ID never changes at run time, so we might as well tell the
69  * compiler that it's constant.  Use this function to read the CPU ID
70  * rather than directly reading processor_id or read_cpuid() directly.
71  */
72 static inline unsigned int __attribute_const__ read_cpuid_id(void)
73 {
74         return read_cpuid(CPUID_ID);
75 }
76
77 static inline unsigned int __attribute_const__ read_cpuid_cachetype(void)
78 {
79         return read_cpuid(CPUID_CACHETYPE);
80 }
81
82 static inline unsigned int __attribute_const__ read_cpuid_tcmstatus(void)
83 {
84         return read_cpuid(CPUID_TCM);
85 }
86
87 static inline unsigned int __attribute_const__ read_cpuid_mpidr(void)
88 {
89         return read_cpuid(CPUID_MPIDR);
90 }
91
92 /*
93  * Intel's XScale3 core supports some v6 features (supersections, L2)
94  * but advertises itself as v5 as it does not support the v6 ISA.  For
95  * this reason, we need a way to explicitly test for this type of CPU.
96  */
97 #ifndef CONFIG_CPU_XSC3
98 #define cpu_is_xsc3()   0
99 #else
100 static inline int cpu_is_xsc3(void)
101 {
102         unsigned int id;
103         id = read_cpuid_id() & 0xffffe000;
104         /* It covers both Intel ID and Marvell ID */
105         if ((id == 0x69056000) || (id == 0x56056000))
106                 return 1;
107
108         return 0;
109 }
110 #endif
111
112 #if !defined(CONFIG_CPU_XSCALE) && !defined(CONFIG_CPU_XSC3)
113 #define cpu_is_xscale() 0
114 #else
115 #define cpu_is_xscale() 1
116 #endif
117
118 #endif