1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/* $Id: processor.h,v 1.83 2002/02/10 06:04:33 davem Exp $
* include/asm-sparc64/processor.h
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef __ASM_SPARC64_PROCESSOR_H
#define __ASM_SPARC64_PROCESSOR_H
/*
* Sparc64 implementation of macro that returns current
* instruction pointer ("program counter").
*/
#define current_text_addr() ({ void *pc; __asm__("rd %%pc, %0" : "=r" (pc)); pc; })
#include <asm/asi.h>
#include <asm/a.out.h>
#include <asm/pstate.h>
#include <asm/ptrace.h>
#include <asm/page.h>
/* The sparc has no problems with write protection */
#define wp_works_ok 1
#define wp_works_ok__is_a_macro /* for versions in ksyms.c */
/*
* User lives in his very own context, and cannot reference us. Note
* that TASK_SIZE is a misnomer, it really gives maximum user virtual
* address that the kernel will allocate out.
*
* XXX No longer using virtual page tables, kill this upper limit...
*/
#define VA_BITS 44
#ifndef __ASSEMBLY__
#define VPTE_SIZE (1UL << (VA_BITS - PAGE_SHIFT + 3))
#else
#define VPTE_SIZE (1 << (VA_BITS - PAGE_SHIFT + 3))
#endif
#define TASK_SIZE ((unsigned long)-VPTE_SIZE)
#ifdef __KERNEL__
#define STACK_TOP32 ((1UL << 32UL) - PAGE_SIZE)
#define STACK_TOP64 (0x0000080000000000UL - (1UL << 32UL))
#define STACK_TOP (test_thread_flag(TIF_32BIT) ? \
STACK_TOP32 : STACK_TOP64)
#define STACK_TOP_MAX STACK_TOP64
#endif
#ifndef __ASSEMBLY__
typedef struct {
unsigned char seg;
} mm_segment_t;
/* The Sparc processor specific thread struct. */
/* XXX This should die, everything can go into thread_info now. */
struct thread_struct {
#ifdef CONFIG_DEBUG_SPINLOCK
/* How many spinlocks held by this thread.
* Used with spin lock debugging to catch tasks
* sleeping illegally with locks held.
*/
int smp_lock_count;
unsigned int smp_lock_pc;
#else
int dummy; /* f'in gcc bug... */
#endif
};
#endif /* !(__ASSEMBLY__) */
#ifndef CONFIG_DEBUG_SPINLOCK
#define INIT_THREAD { \
0, \
}
#else /* CONFIG_DEBUG_SPINLOCK */
#define INIT_THREAD { \
/* smp_lock_count, smp_lock_pc, */ \
0, 0, \
}
#endif /* !(CONFIG_DEBUG_SPINLOCK) */
#ifndef __ASSEMBLY__
#include <linux/types.h>
/* Return saved PC of a blocked thread. */
struct task_struct;
extern unsigned long thread_saved_pc(struct task_struct *);
/* On Uniprocessor, even in RMO processes see TSO semantics */
#ifdef CONFIG_SMP
#define TSTATE_INITIAL_MM TSTATE_TSO
#else
#define TSTATE_INITIAL_MM TSTATE_RMO
#endif
/* Do necessary setup to start up a newly executed thread. */
#define start_thread(regs, pc, sp) \
do { \
unsigned long __asi = ASI_PNF; \
regs->tstate = (regs->tstate & (TSTATE_CWP)) | (TSTATE_INITIAL_MM|TSTATE_IE) | (__asi << 24UL); \
regs->tpc = ((pc & (~3)) - 4); \
regs->tnpc = regs->tpc + 4; \
regs->y = 0; \
set_thread_wstate(1 << 3); \
if (current_thread_info()->utraps) { \
if (*(current_thread_info()->utraps) < 2) \
kfree(current_thread_info()->utraps); \
else \
(*(current_thread_info()->utraps))--; \
current_thread_info()->utraps = NULL; \
} \
__asm__ __volatile__( \
"stx %%g0, [%0 + %2 + 0x00]\n\t" \
"stx %%g0, [%0 + %2 + 0x08]\n\t" \
"stx %%g0, [%0 + %2 + 0x10]\n\t" \
"stx %%g0, [%0 + %2 + 0x18]\n\t" \
"stx %%g0, [%0 + %2 + 0x20]\n\t" \
"stx %%g0, [%0 + %2 + 0x28]\n\t" \
"stx %%g0, [%0 + %2 + 0x30]\n\t" \
"stx %%g0, [%0 + %2 + 0x38]\n\t" \
"stx %%g0, [%0 + %2 + 0x40]\n\t" \
"stx %%g0, [%0 + %2 + 0x48]\n\t" \
"stx %%g0, [%0 + %2 + 0x50]\n\t" \
"stx %%g0, [%0 + %2 + 0x58]\n\t" \
"stx %%g0, [%0 + %2 + 0x60]\n\t" \
"stx %%g0, [%0 + %2 + 0x68]\n\t" \
"stx %1, [%0 + %2 + 0x70]\n\t" \
"stx %%g0, [%0 + %2 + 0x78]\n\t" \
"wrpr %%g0, (1 << 3), %%wstate\n\t" \
: \
: "r" (regs), "r" (sp - sizeof(struct reg_window) - STACK_BIAS), \
"i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
} while (0)
#define start_thread32(regs, pc, sp) \
do { \
unsigned long __asi = ASI_PNF; \
pc &= 0x00000000ffffffffUL; \
sp &= 0x00000000ffffffffUL; \
regs->tstate = (regs->tstate & (TSTATE_CWP))|(TSTATE_INITIAL_MM|TSTATE_IE|TSTATE_AM) | (__asi << 24UL); \
regs->tpc = ((pc & (~3)) - 4); \
regs->tnpc = regs->tpc + 4; \
regs->y = 0; \
set_thread_wstate(2 << 3); \
if (current_thread_info()->utraps) { \
if (*(current_thread_info()->utraps) < 2) \
kfree(current_thread_info()->utraps); \
else \
(*(current_thread_info()->utraps))--; \
current_thread_info()->utraps = NULL; \
} \
__asm__ __volatile__( \
"stx %%g0, [%0 + %2 + 0x00]\n\t" \
"stx %%g0, [%0 + %2 + 0x08]\n\t" \
"stx %%g0, [%0 + %2 + 0x10]\n\t" \
"stx %%g0, [%0 + %2 + 0x18]\n\t" \
"stx %%g0, [%0 + %2 + 0x20]\n\t" \
"stx %%g0, [%0 + %2 + 0x28]\n\t" \
"stx %%g0, [%0 + %2 + 0x30]\n\t" \
"stx %%g0, [%0 + %2 + 0x38]\n\t" \
"stx %%g0, [%0 + %2 + 0x40]\n\t" \
"stx %%g0, [%0 + %2 + 0x48]\n\t" \
"stx %%g0, [%0 + %2 + 0x50]\n\t" \
"stx %%g0, [%0 + %2 + 0x58]\n\t" \
"stx %%g0, [%0 + %2 + 0x60]\n\t" \
"stx %%g0, [%0 + %2 + 0x68]\n\t" \
"stx %1, [%0 + %2 + 0x70]\n\t" \
"stx %%g0, [%0 + %2 + 0x78]\n\t" \
"wrpr %%g0, (2 << 3), %%wstate\n\t" \
: \
: "r" (regs), "r" (sp - sizeof(struct reg_window32)), \
"i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
} while (0)
/* Free all resources held by a thread. */
#define release_thread(tsk) do { } while (0)
/* Prepare to copy thread state - unlazy all lazy status */
#define prepare_to_copy(tsk) do { } while (0)
extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
extern unsigned long get_wchan(struct task_struct *task);
#define task_pt_regs(tsk) (task_thread_info(tsk)->kregs)
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->tpc)
#define KSTK_ESP(tsk) (task_pt_regs(tsk)->u_regs[UREG_FP])
#define cpu_relax() barrier()
/* Prefetch support. This is tuned for UltraSPARC-III and later.
* UltraSPARC-I will treat these as nops, and UltraSPARC-II has
* a shallower prefetch queue than later chips.
*/
#define ARCH_HAS_PREFETCH
#define ARCH_HAS_PREFETCHW
#define ARCH_HAS_SPINLOCK_PREFETCH
static inline void prefetch(const void *x)
{
/* We do not use the read prefetch mnemonic because that
* prefetches into the prefetch-cache which only is accessible
* by floating point operations in UltraSPARC-III and later.
* By contrast, "#one_write" prefetches into the L2 cache
* in shared state.
*/
__asm__ __volatile__("prefetch [%0], #one_write"
: /* no outputs */
: "r" (x));
}
static inline void prefetchw(const void *x)
{
/* The most optimal prefetch to use for writes is
* "#n_writes". This brings the cacheline into the
* L2 cache in "owned" state.
*/
__asm__ __volatile__("prefetch [%0], #n_writes"
: /* no outputs */
: "r" (x));
}
#define spin_lock_prefetch(x) prefetchw(x)
#define HAVE_ARCH_PICK_MMAP_LAYOUT
#endif /* !(__ASSEMBLY__) */
#endif /* !(__ASM_SPARC64_PROCESSOR_H) */
|
