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Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
[linux-2.6/mini2440.git] / arch / ia64 / include / asm / intrinsics.h
blob111ed52228921cac226a8994e404e3100defb73c
1 #ifndef _ASM_IA64_INTRINSICS_H
2 #define _ASM_IA64_INTRINSICS_H
3
4 /*
5 * Compiler-dependent intrinsics.
6 *
7 * Copyright (C) 2002-2003 Hewlett-Packard Co
8 * David Mosberger-Tang <davidm@hpl.hp.com>
9 */
10
11 #ifndef __ASSEMBLY__
12
13 #include <linux/types.h>
14 /* include compiler specific intrinsics */
15 #include <asm/ia64regs.h>
16 #ifdef __INTEL_COMPILER
17 # include <asm/intel_intrin.h>
18 #else
19 # include <asm/gcc_intrin.h>
20 #endif
21
22 #define ia64_native_get_psr_i() (ia64_native_getreg(_IA64_REG_PSR) & IA64_PSR_I)
23
24 #define ia64_native_set_rr0_to_rr4(val0, val1, val2, val3, val4) \
25 do { \
26 ia64_native_set_rr(0x0000000000000000UL, (val0)); \
27 ia64_native_set_rr(0x2000000000000000UL, (val1)); \
28 ia64_native_set_rr(0x4000000000000000UL, (val2)); \
29 ia64_native_set_rr(0x6000000000000000UL, (val3)); \
30 ia64_native_set_rr(0x8000000000000000UL, (val4)); \
31 } while (0)
32
33 /*
34 * Force an unresolved reference if someone tries to use
35 * ia64_fetch_and_add() with a bad value.
36 */
37 extern unsigned long __bad_size_for_ia64_fetch_and_add (void);
38 extern unsigned long __bad_increment_for_ia64_fetch_and_add (void);
39
40 #define IA64_FETCHADD(tmp,v,n,sz,sem) \
41 ({ \
42 switch (sz) { \
43 case 4: \
44 tmp = ia64_fetchadd4_##sem((unsigned int *) v, n); \
45 break; \
46 \
47 case 8: \
48 tmp = ia64_fetchadd8_##sem((unsigned long *) v, n); \
49 break; \
50 \
51 default: \
52 __bad_size_for_ia64_fetch_and_add(); \
53 } \
54 })
55
56 #define ia64_fetchadd(i,v,sem) \
57 ({ \
58 __u64 _tmp; \
59 volatile __typeof__(*(v)) *_v = (v); \
60 /* Can't use a switch () here: gcc isn't always smart enough for that... */ \
61 if ((i) == -16) \
62 IA64_FETCHADD(_tmp, _v, -16, sizeof(*(v)), sem); \
63 else if ((i) == -8) \
64 IA64_FETCHADD(_tmp, _v, -8, sizeof(*(v)), sem); \
65 else if ((i) == -4) \
66 IA64_FETCHADD(_tmp, _v, -4, sizeof(*(v)), sem); \
67 else if ((i) == -1) \
68 IA64_FETCHADD(_tmp, _v, -1, sizeof(*(v)), sem); \
69 else if ((i) == 1) \
70 IA64_FETCHADD(_tmp, _v, 1, sizeof(*(v)), sem); \
71 else if ((i) == 4) \
72 IA64_FETCHADD(_tmp, _v, 4, sizeof(*(v)), sem); \
73 else if ((i) == 8) \
74 IA64_FETCHADD(_tmp, _v, 8, sizeof(*(v)), sem); \
75 else if ((i) == 16) \
76 IA64_FETCHADD(_tmp, _v, 16, sizeof(*(v)), sem); \
77 else \
78 _tmp = __bad_increment_for_ia64_fetch_and_add(); \
79 (__typeof__(*(v))) (_tmp); /* return old value */ \
80 })
81
82 #define ia64_fetch_and_add(i,v) (ia64_fetchadd(i, v, rel) + (i)) /* return new value */
83
84 /*
85 * This function doesn't exist, so you'll get a linker error if
86 * something tries to do an invalid xchg().
87 */
88 extern void ia64_xchg_called_with_bad_pointer (void);
89
90 #define __xchg(x,ptr,size) \
91 ({ \
92 unsigned long __xchg_result; \
93 \
94 switch (size) { \
95 case 1: \
96 __xchg_result = ia64_xchg1((__u8 *)ptr, x); \
97 break; \
98 \
99 case 2: \
100 __xchg_result = ia64_xchg2((__u16 *)ptr, x); \
101 break; \
102 \
103 case 4: \
104 __xchg_result = ia64_xchg4((__u32 *)ptr, x); \
105 break; \
106 \
107 case 8: \
108 __xchg_result = ia64_xchg8((__u64 *)ptr, x); \
109 break; \
110 default: \
111 ia64_xchg_called_with_bad_pointer(); \
112 } \
113 __xchg_result; \
114 })
115
116 #define xchg(ptr,x) \
117 ((__typeof__(*(ptr))) __xchg ((unsigned long) (x), (ptr), sizeof(*(ptr))))
118
119 /*
120 * Atomic compare and exchange. Compare OLD with MEM, if identical,
121 * store NEW in MEM. Return the initial value in MEM. Success is
122 * indicated by comparing RETURN with OLD.
123 */
124
125 #define __HAVE_ARCH_CMPXCHG 1
126
127 /*
128 * This function doesn't exist, so you'll get a linker error
129 * if something tries to do an invalid cmpxchg().
130 */
131 extern long ia64_cmpxchg_called_with_bad_pointer (void);
132
133 #define ia64_cmpxchg(sem,ptr,old,new,size) \
134 ({ \
135 __u64 _o_, _r_; \
136 \
137 switch (size) { \
138 case 1: _o_ = (__u8 ) (long) (old); break; \
139 case 2: _o_ = (__u16) (long) (old); break; \
140 case 4: _o_ = (__u32) (long) (old); break; \
141 case 8: _o_ = (__u64) (long) (old); break; \
142 default: break; \
143 } \
144 switch (size) { \
145 case 1: \
146 _r_ = ia64_cmpxchg1_##sem((__u8 *) ptr, new, _o_); \
147 break; \
148 \
149 case 2: \
150 _r_ = ia64_cmpxchg2_##sem((__u16 *) ptr, new, _o_); \
151 break; \
152 \
153 case 4: \
154 _r_ = ia64_cmpxchg4_##sem((__u32 *) ptr, new, _o_); \
155 break; \
156 \
157 case 8: \
158 _r_ = ia64_cmpxchg8_##sem((__u64 *) ptr, new, _o_); \
159 break; \
160 \
161 default: \
162 _r_ = ia64_cmpxchg_called_with_bad_pointer(); \
163 break; \
164 } \
165 (__typeof__(old)) _r_; \
166 })
167
168 #define cmpxchg_acq(ptr, o, n) \
169 ia64_cmpxchg(acq, (ptr), (o), (n), sizeof(*(ptr)))
170 #define cmpxchg_rel(ptr, o, n) \
171 ia64_cmpxchg(rel, (ptr), (o), (n), sizeof(*(ptr)))
172
173 /* for compatibility with other platforms: */
174 #define cmpxchg(ptr, o, n) cmpxchg_acq((ptr), (o), (n))
175 #define cmpxchg64(ptr, o, n) cmpxchg_acq((ptr), (o), (n))
176
177 #define cmpxchg_local cmpxchg
178 #define cmpxchg64_local cmpxchg64
179
180 #ifdef CONFIG_IA64_DEBUG_CMPXCHG
181 # define CMPXCHG_BUGCHECK_DECL int _cmpxchg_bugcheck_count = 128;
182 # define CMPXCHG_BUGCHECK(v) \
183 do { \
184 if (_cmpxchg_bugcheck_count-- <= 0) { \
185 void *ip; \
186 extern int printk(const char *fmt, ...); \
187 ip = (void *) ia64_getreg(_IA64_REG_IP); \
188 printk("CMPXCHG_BUGCHECK: stuck at %p on word %p\n", ip, (v)); \
189 break; \
190 } \
191 } while (0)
192 #else /* !CONFIG_IA64_DEBUG_CMPXCHG */
193 # define CMPXCHG_BUGCHECK_DECL
194 # define CMPXCHG_BUGCHECK(v)
195 #endif /* !CONFIG_IA64_DEBUG_CMPXCHG */
196
197 #endif
198
199 #ifdef __KERNEL__
200 #include <asm/paravirt_privop.h>
201 #endif
202
203 #ifndef __ASSEMBLY__
204 #if defined(CONFIG_PARAVIRT) && defined(__KERNEL__)
205 #ifdef ASM_SUPPORTED
206 # define IA64_INTRINSIC_API(name) paravirt_ ## name
207 #else
208 # define IA64_INTRINSIC_API(name) pv_cpu_ops.name
209 #endif
210 #define IA64_INTRINSIC_MACRO(name) paravirt_ ## name
211 #else
212 #define IA64_INTRINSIC_API(name) ia64_native_ ## name
213 #define IA64_INTRINSIC_MACRO(name) ia64_native_ ## name
214 #endif
215
216 /************************************************/
217 /* Instructions paravirtualized for correctness */
218 /************************************************/
219 /* fc, thash, get_cpuid, get_pmd, get_eflags, set_eflags */
220 /* Note that "ttag" and "cover" are also privilege-sensitive; "ttag"
221 * is not currently used (though it may be in a long-format VHPT system!)
222 */
223 #define ia64_fc IA64_INTRINSIC_API(fc)
224 #define ia64_thash IA64_INTRINSIC_API(thash)
225 #define ia64_get_cpuid IA64_INTRINSIC_API(get_cpuid)
226 #define ia64_get_pmd IA64_INTRINSIC_API(get_pmd)
227
228
229 /************************************************/
230 /* Instructions paravirtualized for performance */
231 /************************************************/
232 #define ia64_ssm IA64_INTRINSIC_MACRO(ssm)
233 #define ia64_rsm IA64_INTRINSIC_MACRO(rsm)
234 #define ia64_getreg IA64_INTRINSIC_MACRO(getreg)
235 #define ia64_setreg IA64_INTRINSIC_API(setreg)
236 #define ia64_set_rr IA64_INTRINSIC_API(set_rr)
237 #define ia64_get_rr IA64_INTRINSIC_API(get_rr)
238 #define ia64_ptcga IA64_INTRINSIC_API(ptcga)
239 #define ia64_get_psr_i IA64_INTRINSIC_API(get_psr_i)
240 #define ia64_intrin_local_irq_restore \
241 IA64_INTRINSIC_API(intrin_local_irq_restore)
242 #define ia64_set_rr0_to_rr4 IA64_INTRINSIC_API(set_rr0_to_rr4)
243
244 #endif /* !__ASSEMBLY__ */
245
246 #endif /* _ASM_IA64_INTRINSICS_H */
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