1#ifndef __SPARC64_SYSTEM_H
2#define __SPARC64_SYSTEM_H
3
4#include <asm/ptrace.h>
5#include <asm/processor.h>
6#include <asm/visasm.h>
7
8#ifndef __ASSEMBLY__
9
10#include <linux/irqflags.h>
11#include <asm-generic/cmpxchg-local.h>
12
13
14
15
16enum sparc_cpu {
17 sun4 = 0x00,
18 sun4c = 0x01,
19 sun4m = 0x02,
20 sun4d = 0x03,
21 sun4e = 0x04,
22 sun4u = 0x05,
23 sun_unknown = 0x06,
24 ap1000 = 0x07,
25};
26
27#define sparc_cpu_model sun4u
28
29
30#define ARCH_SUN4C 0
31
32extern const char *sparc_cpu_type;
33extern const char *sparc_fpu_type;
34extern const char *sparc_pmu_type;
35
36extern char reboot_command[];
37
38
39
40
41
42
43
44
45
46
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51
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57
58
59#define membar_safe(type) \
60do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \
61 " membar " type "\n" \
62 "1:\n" \
63 : : : "memory"); \
64} while (0)
65
66
67
68
69
70#define mb() membar_safe("#StoreLoad")
71#define rmb() __asm__ __volatile__("":::"memory")
72#define wmb() __asm__ __volatile__("":::"memory")
73
74#endif
75
76#define nop() __asm__ __volatile__ ("nop")
77
78#define read_barrier_depends() do { } while(0)
79#define set_mb(__var, __value) \
80 do { __var = __value; membar_safe("#StoreLoad"); } while(0)
81
82#ifdef CONFIG_SMP
83#define smp_mb() mb()
84#define smp_rmb() rmb()
85#define smp_wmb() wmb()
86#else
87#define smp_mb() __asm__ __volatile__("":::"memory")
88#define smp_rmb() __asm__ __volatile__("":::"memory")
89#define smp_wmb() __asm__ __volatile__("":::"memory")
90#endif
91
92#define smp_read_barrier_depends() do { } while(0)
93
94#define flushi(addr) __asm__ __volatile__ ("flush %0" : : "r" (addr) : "memory")
95
96#define flushw_all() __asm__ __volatile__("flushw")
97
98
99#define read_pcr(__p) __asm__ __volatile__("rd %%pcr, %0" : "=r" (__p))
100#define write_pcr(__p) __asm__ __volatile__("wr %0, 0x0, %%pcr" : : "r" (__p))
101#define read_pic(__p) __asm__ __volatile__("rd %%pic, %0" : "=r" (__p))
102
103
104
105
106
107#define write_pic(__p) \
108 __asm__ __volatile__("ba,pt %%xcc, 99f\n\t" \
109 ".align 64\n" \
110 "99:wr %0, 0x0, %%pic\n\t" \
111 "rd %%pic, %%g0" : : "r" (__p))
112#define reset_pic() write_pic(0)
113
114#ifndef __ASSEMBLY__
115
116extern void sun_do_break(void);
117extern int stop_a_enabled;
118extern int scons_pwroff;
119
120extern void fault_in_user_windows(void);
121extern void synchronize_user_stack(void);
122
123extern void __flushw_user(void);
124#define flushw_user() __flushw_user()
125
126#define flush_user_windows flushw_user
127#define flush_register_windows flushw_all
128
129
130#define __ARCH_WANT_UNLOCKED_CTXSW
131#define prepare_arch_switch(next) \
132do { \
133 flushw_all(); \
134} while (0)
135
136
137
138
139
140
141
142
143
144
145#define switch_to(prev, next, last) \
146do { if (test_thread_flag(TIF_PERFCTR)) { \
147 unsigned long __tmp; \
148 read_pcr(__tmp); \
149 current_thread_info()->pcr_reg = __tmp; \
150 read_pic(__tmp); \
151 current_thread_info()->kernel_cntd0 += (unsigned int)(__tmp);\
152 current_thread_info()->kernel_cntd1 += ((__tmp) >> 32); \
153 } \
154 flush_tlb_pending(); \
155 save_and_clear_fpu(); \
156 \
157 \
158 __asm__ __volatile__("wr %%g0, %0, %%asi" \
159 : : "r" (__thread_flag_byte_ptr(task_thread_info(next))[TI_FLAG_BYTE_CURRENT_DS]));\
160 trap_block[current_thread_info()->cpu].thread = \
161 task_thread_info(next); \
162 __asm__ __volatile__( \
163 "mov %%g4, %%g7\n\t" \
164 "stx %%i6, [%%sp + 2047 + 0x70]\n\t" \
165 "stx %%i7, [%%sp + 2047 + 0x78]\n\t" \
166 "rdpr %%wstate, %%o5\n\t" \
167 "stx %%o6, [%%g6 + %6]\n\t" \
168 "stb %%o5, [%%g6 + %5]\n\t" \
169 "rdpr %%cwp, %%o5\n\t" \
170 "stb %%o5, [%%g6 + %8]\n\t" \
171 "wrpr %%g0, 15, %%pil\n\t" \
172 "mov %4, %%g6\n\t" \
173 "ldub [%4 + %8], %%g1\n\t" \
174 "wrpr %%g1, %%cwp\n\t" \
175 "ldx [%%g6 + %6], %%o6\n\t" \
176 "ldub [%%g6 + %5], %%o5\n\t" \
177 "ldub [%%g6 + %7], %%o7\n\t" \
178 "wrpr %%o5, 0x0, %%wstate\n\t" \
179 "ldx [%%sp + 2047 + 0x70], %%i6\n\t" \
180 "ldx [%%sp + 2047 + 0x78], %%i7\n\t" \
181 "ldx [%%g6 + %9], %%g4\n\t" \
182 "wrpr %%g0, 14, %%pil\n\t" \
183 "brz,pt %%o7, switch_to_pc\n\t" \
184 " mov %%g7, %0\n\t" \
185 "sethi %%hi(ret_from_syscall), %%g1\n\t" \
186 "jmpl %%g1 + %%lo(ret_from_syscall), %%g0\n\t" \
187 " nop\n\t" \
188 ".globl switch_to_pc\n\t" \
189 "switch_to_pc:\n\t" \
190 : "=&r" (last), "=r" (current), "=r" (current_thread_info_reg), \
191 "=r" (__local_per_cpu_offset) \
192 : "0" (task_thread_info(next)), \
193 "i" (TI_WSTATE), "i" (TI_KSP), "i" (TI_NEW_CHILD), \
194 "i" (TI_CWP), "i" (TI_TASK) \
195 : "cc", \
196 "g1", "g2", "g3", "g7", \
197 "l1", "l2", "l3", "l4", "l5", "l6", "l7", \
198 "i0", "i1", "i2", "i3", "i4", "i5", \
199 "o0", "o1", "o2", "o3", "o4", "o5", "o7"); \
200 \
201 if (test_thread_flag(TIF_PERFCTR)) { \
202 write_pcr(current_thread_info()->pcr_reg); \
203 reset_pic(); \
204 } \
205} while(0)
206
207static inline unsigned long xchg32(__volatile__ unsigned int *m, unsigned int val)
208{
209 unsigned long tmp1, tmp2;
210
211 __asm__ __volatile__(
212" mov %0, %1\n"
213"1: lduw [%4], %2\n"
214" cas [%4], %2, %0\n"
215" cmp %2, %0\n"
216" bne,a,pn %%icc, 1b\n"
217" mov %1, %0\n"
218 : "=&r" (val), "=&r" (tmp1), "=&r" (tmp2)
219 : "0" (val), "r" (m)
220 : "cc", "memory");
221 return val;
222}
223
224static inline unsigned long xchg64(__volatile__ unsigned long *m, unsigned long val)
225{
226 unsigned long tmp1, tmp2;
227
228 __asm__ __volatile__(
229" mov %0, %1\n"
230"1: ldx [%4], %2\n"
231" casx [%4], %2, %0\n"
232" cmp %2, %0\n"
233" bne,a,pn %%xcc, 1b\n"
234" mov %1, %0\n"
235 : "=&r" (val), "=&r" (tmp1), "=&r" (tmp2)
236 : "0" (val), "r" (m)
237 : "cc", "memory");
238 return val;
239}
240
241#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
242
243extern void __xchg_called_with_bad_pointer(void);
244
245static inline unsigned long __xchg(unsigned long x, __volatile__ void * ptr,
246 int size)
247{
248 switch (size) {
249 case 4:
250 return xchg32(ptr, x);
251 case 8:
252 return xchg64(ptr, x);
253 };
254 __xchg_called_with_bad_pointer();
255 return x;
256}
257
258extern void die_if_kernel(char *str, struct pt_regs *regs) __attribute__ ((noreturn));
259
260
261
262
263
264
265
266#define __HAVE_ARCH_CMPXCHG 1
267
268static inline unsigned long
269__cmpxchg_u32(volatile int *m, int old, int new)
270{
271 __asm__ __volatile__("cas [%2], %3, %0"
272 : "=&r" (new)
273 : "0" (new), "r" (m), "r" (old)
274 : "memory");
275
276 return new;
277}
278
279static inline unsigned long
280__cmpxchg_u64(volatile long *m, unsigned long old, unsigned long new)
281{
282 __asm__ __volatile__("casx [%2], %3, %0"
283 : "=&r" (new)
284 : "0" (new), "r" (m), "r" (old)
285 : "memory");
286
287 return new;
288}
289
290
291
292extern void __cmpxchg_called_with_bad_pointer(void);
293
294static inline unsigned long
295__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
296{
297 switch (size) {
298 case 4:
299 return __cmpxchg_u32(ptr, old, new);
300 case 8:
301 return __cmpxchg_u64(ptr, old, new);
302 }
303 __cmpxchg_called_with_bad_pointer();
304 return old;
305}
306
307#define cmpxchg(ptr,o,n) \
308 ({ \
309 __typeof__(*(ptr)) _o_ = (o); \
310 __typeof__(*(ptr)) _n_ = (n); \
311 (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \
312 (unsigned long)_n_, sizeof(*(ptr))); \
313 })
314
315
316
317
318
319
320static inline unsigned long __cmpxchg_local(volatile void *ptr,
321 unsigned long old,
322 unsigned long new, int size)
323{
324 switch (size) {
325 case 4:
326 case 8: return __cmpxchg(ptr, old, new, size);
327 default:
328 return __cmpxchg_local_generic(ptr, old, new, size);
329 }
330
331 return old;
332}
333
334#define cmpxchg_local(ptr, o, n) \
335 ((__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o), \
336 (unsigned long)(n), sizeof(*(ptr))))
337#define cmpxchg64_local(ptr, o, n) \
338 ({ \
339 BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
340 cmpxchg_local((ptr), (o), (n)); \
341 })
342
343#endif
344
345#define arch_align_stack(x) (x)
346
347#endif
348