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1/*
2 * include/asm/processor.h
3 *
4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
5 */
6
7#ifndef __ASM_SPARC64_PROCESSOR_H
8#define __ASM_SPARC64_PROCESSOR_H
9
10/*
11 * Sparc64 implementation of macro that returns current
12 * instruction pointer ("program counter").
13 */
14#define current_text_addr() ({ void *pc; __asm__("rd %%pc, %0" : "=r" (pc)); pc; })
15
16#include <asm/asi.h>
17#include <asm/pstate.h>
18#include <asm/ptrace.h>
19#include <asm/page.h>
20
21/* Don't hold the runqueue lock over context switch */
22#define __ARCH_WANT_UNLOCKED_CTXSW
23
24/* The sparc has no problems with write protection */
25#define wp_works_ok 1
26#define wp_works_ok__is_a_macro /* for versions in ksyms.c */
27
28/*
29 * User lives in his very own context, and cannot reference us. Note
30 * that TASK_SIZE is a misnomer, it really gives maximum user virtual
31 * address that the kernel will allocate out.
32 *
33 * XXX No longer using virtual page tables, kill this upper limit...
34 */
35#define VA_BITS 44
36#ifndef __ASSEMBLY__
37#define VPTE_SIZE (1UL << (VA_BITS - PAGE_SHIFT + 3))
38#else
39#define VPTE_SIZE (1 << (VA_BITS - PAGE_SHIFT + 3))
40#endif
41
42#define TASK_SIZE_OF(tsk) \
43 (test_tsk_thread_flag(tsk,TIF_32BIT) ? \
44 (1UL << 32UL) : ((unsigned long)-VPTE_SIZE))
45#define TASK_SIZE \
46 (test_thread_flag(TIF_32BIT) ? \
47 (1UL << 32UL) : ((unsigned long)-VPTE_SIZE))
48#ifdef __KERNEL__
49
50#define STACK_TOP32 ((1UL << 32UL) - PAGE_SIZE)
51#define STACK_TOP64 (0x0000080000000000UL - (1UL << 32UL))
52
53#define STACK_TOP (test_thread_flag(TIF_32BIT) ? \
54 STACK_TOP32 : STACK_TOP64)
55
56#define STACK_TOP_MAX STACK_TOP64
57
58#endif
59
60#ifndef __ASSEMBLY__
61
62typedef struct {
63 unsigned char seg;
64} mm_segment_t;
65
66/* The Sparc processor specific thread struct. */
67/* XXX This should die, everything can go into thread_info now. */
68struct thread_struct {
69#ifdef CONFIG_DEBUG_SPINLOCK
70 /* How many spinlocks held by this thread.
71 * Used with spin lock debugging to catch tasks
72 * sleeping illegally with locks held.
73 */
74 int smp_lock_count;
75 unsigned int smp_lock_pc;
76#else
77 int dummy; /* f'in gcc bug... */
78#endif
79};
80
81#endif /* !(__ASSEMBLY__) */
82
83#ifndef CONFIG_DEBUG_SPINLOCK
84#define INIT_THREAD { \
85 0, \
86}
87#else /* CONFIG_DEBUG_SPINLOCK */
88#define INIT_THREAD { \
89/* smp_lock_count, smp_lock_pc, */ \
90 0, 0, \
91}
92#endif /* !(CONFIG_DEBUG_SPINLOCK) */
93
94#ifndef __ASSEMBLY__
95
96#include <linux/types.h>
97
98/* Return saved PC of a blocked thread. */
99struct task_struct;
100extern unsigned long thread_saved_pc(struct task_struct *);
101
102/* On Uniprocessor, even in RMO processes see TSO semantics */
103#ifdef CONFIG_SMP
104#define TSTATE_INITIAL_MM TSTATE_TSO
105#else
106#define TSTATE_INITIAL_MM TSTATE_RMO
107#endif
108
109/* Do necessary setup to start up a newly executed thread. */
110#define start_thread(regs, pc, sp) \
111do { \
112 unsigned long __asi = ASI_PNF; \
113 regs->tstate = (regs->tstate & (TSTATE_CWP)) | (TSTATE_INITIAL_MM|TSTATE_IE) | (__asi << 24UL); \
114 regs->tpc = ((pc & (~3)) - 4); \
115 regs->tnpc = regs->tpc + 4; \
116 regs->y = 0; \
117 set_thread_wstate(1 << 3); \
118 if (current_thread_info()->utraps) { \
119 if (*(current_thread_info()->utraps) < 2) \
120 kfree(current_thread_info()->utraps); \
121 else \
122 (*(current_thread_info()->utraps))--; \
123 current_thread_info()->utraps = NULL; \
124 } \
125 __asm__ __volatile__( \
126 "stx %%g0, [%0 + %2 + 0x00]\n\t" \
127 "stx %%g0, [%0 + %2 + 0x08]\n\t" \
128 "stx %%g0, [%0 + %2 + 0x10]\n\t" \
129 "stx %%g0, [%0 + %2 + 0x18]\n\t" \
130 "stx %%g0, [%0 + %2 + 0x20]\n\t" \
131 "stx %%g0, [%0 + %2 + 0x28]\n\t" \
132 "stx %%g0, [%0 + %2 + 0x30]\n\t" \
133 "stx %%g0, [%0 + %2 + 0x38]\n\t" \
134 "stx %%g0, [%0 + %2 + 0x40]\n\t" \
135 "stx %%g0, [%0 + %2 + 0x48]\n\t" \
136 "stx %%g0, [%0 + %2 + 0x50]\n\t" \
137 "stx %%g0, [%0 + %2 + 0x58]\n\t" \
138 "stx %%g0, [%0 + %2 + 0x60]\n\t" \
139 "stx %%g0, [%0 + %2 + 0x68]\n\t" \
140 "stx %1, [%0 + %2 + 0x70]\n\t" \
141 "stx %%g0, [%0 + %2 + 0x78]\n\t" \
142 "wrpr %%g0, (1 << 3), %%wstate\n\t" \
143 : \
144 : "r" (regs), "r" (sp - sizeof(struct reg_window) - STACK_BIAS), \
145 "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
146} while (0)
147
148#define start_thread32(regs, pc, sp) \
149do { \
150 unsigned long __asi = ASI_PNF; \
151 pc &= 0x00000000ffffffffUL; \
152 sp &= 0x00000000ffffffffUL; \
153 regs->tstate = (regs->tstate & (TSTATE_CWP))|(TSTATE_INITIAL_MM|TSTATE_IE|TSTATE_AM) | (__asi << 24UL); \
154 regs->tpc = ((pc & (~3)) - 4); \
155 regs->tnpc = regs->tpc + 4; \
156 regs->y = 0; \
157 set_thread_wstate(2 << 3); \
158 if (current_thread_info()->utraps) { \
159 if (*(current_thread_info()->utraps) < 2) \
160 kfree(current_thread_info()->utraps); \
161 else \
162 (*(current_thread_info()->utraps))--; \
163 current_thread_info()->utraps = NULL; \
164 } \
165 __asm__ __volatile__( \
166 "stx %%g0, [%0 + %2 + 0x00]\n\t" \
167 "stx %%g0, [%0 + %2 + 0x08]\n\t" \
168 "stx %%g0, [%0 + %2 + 0x10]\n\t" \
169 "stx %%g0, [%0 + %2 + 0x18]\n\t" \
170 "stx %%g0, [%0 + %2 + 0x20]\n\t" \
171 "stx %%g0, [%0 + %2 + 0x28]\n\t" \
172 "stx %%g0, [%0 + %2 + 0x30]\n\t" \
173 "stx %%g0, [%0 + %2 + 0x38]\n\t" \
174 "stx %%g0, [%0 + %2 + 0x40]\n\t" \
175 "stx %%g0, [%0 + %2 + 0x48]\n\t" \
176 "stx %%g0, [%0 + %2 + 0x50]\n\t" \
177 "stx %%g0, [%0 + %2 + 0x58]\n\t" \
178 "stx %%g0, [%0 + %2 + 0x60]\n\t" \
179 "stx %%g0, [%0 + %2 + 0x68]\n\t" \
180 "stx %1, [%0 + %2 + 0x70]\n\t" \
181 "stx %%g0, [%0 + %2 + 0x78]\n\t" \
182 "wrpr %%g0, (2 << 3), %%wstate\n\t" \
183 : \
184 : "r" (regs), "r" (sp - sizeof(struct reg_window32)), \
185 "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
186} while (0)
187
188/* Free all resources held by a thread. */
189#define release_thread(tsk) do { } while (0)
190
191extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
192
193extern unsigned long get_wchan(struct task_struct *task);
194
195#define task_pt_regs(tsk) (task_thread_info(tsk)->kregs)
196#define KSTK_EIP(tsk) (task_pt_regs(tsk)->tpc)
197#define KSTK_ESP(tsk) (task_pt_regs(tsk)->u_regs[UREG_FP])
198
199#define cpu_relax() barrier()
200
201/* Prefetch support. This is tuned for UltraSPARC-III and later.
202 * UltraSPARC-I will treat these as nops, and UltraSPARC-II has
203 * a shallower prefetch queue than later chips.
204 */
205#define ARCH_HAS_PREFETCH
206#define ARCH_HAS_PREFETCHW
207#define ARCH_HAS_SPINLOCK_PREFETCH
208
209static inline void prefetch(const void *x)
210{
211 /* We do not use the read prefetch mnemonic because that
212 * prefetches into the prefetch-cache which only is accessible
213 * by floating point operations in UltraSPARC-III and later.
214 * By contrast, "#one_write" prefetches into the L2 cache
215 * in shared state.
216 */
217 __asm__ __volatile__("prefetch [%0], #one_write"
218 : /* no outputs */
219 : "r" (x));
220}
221
222static inline void prefetchw(const void *x)
223{
224 /* The most optimal prefetch to use for writes is
225 * "#n_writes". This brings the cacheline into the
226 * L2 cache in "owned" state.
227 */
228 __asm__ __volatile__("prefetch [%0], #n_writes"
229 : /* no outputs */
230 : "r" (x));
231}
232
233#define spin_lock_prefetch(x) prefetchw(x)
234
235#define HAVE_ARCH_PICK_MMAP_LAYOUT
236
237#endif /* !(__ASSEMBLY__) */
238
239#endif /* !(__ASM_SPARC64_PROCESSOR_H) */
1/*
2 * include/asm/processor.h
3 *
4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
5 */
6
7#ifndef __ASM_SPARC64_PROCESSOR_H
8#define __ASM_SPARC64_PROCESSOR_H
9
10/*
11 * Sparc64 implementation of macro that returns current
12 * instruction pointer ("program counter").
13 */
14#define current_text_addr() ({ void *pc; __asm__("rd %%pc, %0" : "=r" (pc)); pc; })
15
16#include <asm/asi.h>
17#include <asm/pstate.h>
18#include <asm/ptrace.h>
19#include <asm/page.h>
20
21/* The sparc has no problems with write protection */
22#define wp_works_ok 1
23#define wp_works_ok__is_a_macro /* for versions in ksyms.c */
24
25/*
26 * User lives in his very own context, and cannot reference us. Note
27 * that TASK_SIZE is a misnomer, it really gives maximum user virtual
28 * address that the kernel will allocate out.
29 *
30 * XXX No longer using virtual page tables, kill this upper limit...
31 */
32#define VA_BITS 44
33#ifndef __ASSEMBLY__
34#define VPTE_SIZE (1UL << (VA_BITS - PAGE_SHIFT + 3))
35#else
36#define VPTE_SIZE (1 << (VA_BITS - PAGE_SHIFT + 3))
37#endif
38
39#define TASK_SIZE_OF(tsk) \
40 (test_tsk_thread_flag(tsk,TIF_32BIT) ? \
41 (1UL << 32UL) : ((unsigned long)-VPTE_SIZE))
42#define TASK_SIZE TASK_SIZE_OF(current)
43#ifdef __KERNEL__
44
45#define STACK_TOP32 ((1UL << 32UL) - PAGE_SIZE)
46#define STACK_TOP64 (0x0000080000000000UL - (1UL << 32UL))
47
48#define STACK_TOP (test_thread_flag(TIF_32BIT) ? \
49 STACK_TOP32 : STACK_TOP64)
50
51#define STACK_TOP_MAX STACK_TOP64
52
53#endif
54
55#ifndef __ASSEMBLY__
56
57typedef struct {
58 unsigned char seg;
59} mm_segment_t;
60
61/* The Sparc processor specific thread struct. */
62/* XXX This should die, everything can go into thread_info now. */
63struct thread_struct {
64#ifdef CONFIG_DEBUG_SPINLOCK
65 /* How many spinlocks held by this thread.
66 * Used with spin lock debugging to catch tasks
67 * sleeping illegally with locks held.
68 */
69 int smp_lock_count;
70 unsigned int smp_lock_pc;
71#else
72 int dummy; /* f'in gcc bug... */
73#endif
74};
75
76#endif /* !(__ASSEMBLY__) */
77
78#ifndef CONFIG_DEBUG_SPINLOCK
79#define INIT_THREAD { \
80 0, \
81}
82#else /* CONFIG_DEBUG_SPINLOCK */
83#define INIT_THREAD { \
84/* smp_lock_count, smp_lock_pc, */ \
85 0, 0, \
86}
87#endif /* !(CONFIG_DEBUG_SPINLOCK) */
88
89#ifndef __ASSEMBLY__
90
91#include <linux/types.h>
92
93/* Return saved PC of a blocked thread. */
94struct task_struct;
95extern unsigned long thread_saved_pc(struct task_struct *);
96
97/* On Uniprocessor, even in RMO processes see TSO semantics */
98#ifdef CONFIG_SMP
99#define TSTATE_INITIAL_MM TSTATE_TSO
100#else
101#define TSTATE_INITIAL_MM TSTATE_RMO
102#endif
103
104/* Do necessary setup to start up a newly executed thread. */
105#define start_thread(regs, pc, sp) \
106do { \
107 unsigned long __asi = ASI_PNF; \
108 regs->tstate = (regs->tstate & (TSTATE_CWP)) | (TSTATE_INITIAL_MM|TSTATE_IE) | (__asi << 24UL); \
109 regs->tpc = ((pc & (~3)) - 4); \
110 regs->tnpc = regs->tpc + 4; \
111 regs->y = 0; \
112 set_thread_wstate(1 << 3); \
113 if (current_thread_info()->utraps) { \
114 if (*(current_thread_info()->utraps) < 2) \
115 kfree(current_thread_info()->utraps); \
116 else \
117 (*(current_thread_info()->utraps))--; \
118 current_thread_info()->utraps = NULL; \
119 } \
120 __asm__ __volatile__( \
121 "stx %%g0, [%0 + %2 + 0x00]\n\t" \
122 "stx %%g0, [%0 + %2 + 0x08]\n\t" \
123 "stx %%g0, [%0 + %2 + 0x10]\n\t" \
124 "stx %%g0, [%0 + %2 + 0x18]\n\t" \
125 "stx %%g0, [%0 + %2 + 0x20]\n\t" \
126 "stx %%g0, [%0 + %2 + 0x28]\n\t" \
127 "stx %%g0, [%0 + %2 + 0x30]\n\t" \
128 "stx %%g0, [%0 + %2 + 0x38]\n\t" \
129 "stx %%g0, [%0 + %2 + 0x40]\n\t" \
130 "stx %%g0, [%0 + %2 + 0x48]\n\t" \
131 "stx %%g0, [%0 + %2 + 0x50]\n\t" \
132 "stx %%g0, [%0 + %2 + 0x58]\n\t" \
133 "stx %%g0, [%0 + %2 + 0x60]\n\t" \
134 "stx %%g0, [%0 + %2 + 0x68]\n\t" \
135 "stx %1, [%0 + %2 + 0x70]\n\t" \
136 "stx %%g0, [%0 + %2 + 0x78]\n\t" \
137 "wrpr %%g0, (1 << 3), %%wstate\n\t" \
138 : \
139 : "r" (regs), "r" (sp - sizeof(struct reg_window) - STACK_BIAS), \
140 "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
141} while (0)
142
143#define start_thread32(regs, pc, sp) \
144do { \
145 unsigned long __asi = ASI_PNF; \
146 pc &= 0x00000000ffffffffUL; \
147 sp &= 0x00000000ffffffffUL; \
148 regs->tstate = (regs->tstate & (TSTATE_CWP))|(TSTATE_INITIAL_MM|TSTATE_IE|TSTATE_AM) | (__asi << 24UL); \
149 regs->tpc = ((pc & (~3)) - 4); \
150 regs->tnpc = regs->tpc + 4; \
151 regs->y = 0; \
152 set_thread_wstate(2 << 3); \
153 if (current_thread_info()->utraps) { \
154 if (*(current_thread_info()->utraps) < 2) \
155 kfree(current_thread_info()->utraps); \
156 else \
157 (*(current_thread_info()->utraps))--; \
158 current_thread_info()->utraps = NULL; \
159 } \
160 __asm__ __volatile__( \
161 "stx %%g0, [%0 + %2 + 0x00]\n\t" \
162 "stx %%g0, [%0 + %2 + 0x08]\n\t" \
163 "stx %%g0, [%0 + %2 + 0x10]\n\t" \
164 "stx %%g0, [%0 + %2 + 0x18]\n\t" \
165 "stx %%g0, [%0 + %2 + 0x20]\n\t" \
166 "stx %%g0, [%0 + %2 + 0x28]\n\t" \
167 "stx %%g0, [%0 + %2 + 0x30]\n\t" \
168 "stx %%g0, [%0 + %2 + 0x38]\n\t" \
169 "stx %%g0, [%0 + %2 + 0x40]\n\t" \
170 "stx %%g0, [%0 + %2 + 0x48]\n\t" \
171 "stx %%g0, [%0 + %2 + 0x50]\n\t" \
172 "stx %%g0, [%0 + %2 + 0x58]\n\t" \
173 "stx %%g0, [%0 + %2 + 0x60]\n\t" \
174 "stx %%g0, [%0 + %2 + 0x68]\n\t" \
175 "stx %1, [%0 + %2 + 0x70]\n\t" \
176 "stx %%g0, [%0 + %2 + 0x78]\n\t" \
177 "wrpr %%g0, (2 << 3), %%wstate\n\t" \
178 : \
179 : "r" (regs), "r" (sp - sizeof(struct reg_window32)), \
180 "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
181} while (0)
182
183/* Free all resources held by a thread. */
184#define release_thread(tsk) do { } while (0)
185
186/* Prepare to copy thread state - unlazy all lazy status */
187#define prepare_to_copy(tsk) do { } while (0)
188
189extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
190
191extern unsigned long get_wchan(struct task_struct *task);
192
193#define task_pt_regs(tsk) (task_thread_info(tsk)->kregs)
194#define KSTK_EIP(tsk) (task_pt_regs(tsk)->tpc)
195#define KSTK_ESP(tsk) (task_pt_regs(tsk)->u_regs[UREG_FP])
196
197#define cpu_relax() barrier()
198
199/* Prefetch support. This is tuned for UltraSPARC-III and later.
200 * UltraSPARC-I will treat these as nops, and UltraSPARC-II has
201 * a shallower prefetch queue than later chips.
202 */
203#define ARCH_HAS_PREFETCH
204#define ARCH_HAS_PREFETCHW
205#define ARCH_HAS_SPINLOCK_PREFETCH
206
207static inline void prefetch(const void *x)
208{
209 /* We do not use the read prefetch mnemonic because that
210 * prefetches into the prefetch-cache which only is accessible
211 * by floating point operations in UltraSPARC-III and later.
212 * By contrast, "#one_write" prefetches into the L2 cache
213 * in shared state.
214 */
215 __asm__ __volatile__("prefetch [%0], #one_write"
216 : /* no outputs */
217 : "r" (x));
218}
219
220static inline void prefetchw(const void *x)
221{
222 /* The most optimal prefetch to use for writes is
223 * "#n_writes". This brings the cacheline into the
224 * L2 cache in "owned" state.
225 */
226 __asm__ __volatile__("prefetch [%0], #n_writes"
227 : /* no outputs */
228 : "r" (x));
229}
230
231#define spin_lock_prefetch(x) prefetchw(x)
232
233#define HAVE_ARCH_PICK_MMAP_LAYOUT
234
235#endif /* !(__ASSEMBLY__) */
236
237#endif /* !(__ASM_SPARC64_PROCESSOR_H) */