Loading...
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) */
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * include/asm/processor.h
4 *
5 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
6 */
7
8#ifndef __ASM_SPARC64_PROCESSOR_H
9#define __ASM_SPARC64_PROCESSOR_H
10
11#include <asm/asi.h>
12#include <asm/pstate.h>
13#include <asm/ptrace.h>
14#include <asm/page.h>
15
16/*
17 * User lives in his very own context, and cannot reference us. Note
18 * that TASK_SIZE is a misnomer, it really gives maximum user virtual
19 * address that the kernel will allocate out.
20 *
21 * XXX No longer using virtual page tables, kill this upper limit...
22 */
23#define VA_BITS 44
24#ifndef __ASSEMBLY__
25#define VPTE_SIZE (1UL << (VA_BITS - PAGE_SHIFT + 3))
26#else
27#define VPTE_SIZE (1 << (VA_BITS - PAGE_SHIFT + 3))
28#endif
29
30#define TASK_SIZE_OF(tsk) \
31 (test_tsk_thread_flag(tsk,TIF_32BIT) ? \
32 (1UL << 32UL) : ((unsigned long)-VPTE_SIZE))
33#define TASK_SIZE \
34 (test_thread_flag(TIF_32BIT) ? \
35 (1UL << 32UL) : ((unsigned long)-VPTE_SIZE))
36#ifdef __KERNEL__
37
38#define STACK_TOP32 ((1UL << 32UL) - PAGE_SIZE)
39#define STACK_TOP64 (0x0000080000000000UL - (1UL << 32UL))
40
41#define STACK_TOP (test_thread_flag(TIF_32BIT) ? \
42 STACK_TOP32 : STACK_TOP64)
43
44#define STACK_TOP_MAX STACK_TOP64
45
46#endif
47
48#ifndef __ASSEMBLY__
49
50typedef struct {
51 unsigned char seg;
52} mm_segment_t;
53
54/* The Sparc processor specific thread struct. */
55/* XXX This should die, everything can go into thread_info now. */
56struct thread_struct {
57#ifdef CONFIG_DEBUG_SPINLOCK
58 /* How many spinlocks held by this thread.
59 * Used with spin lock debugging to catch tasks
60 * sleeping illegally with locks held.
61 */
62 int smp_lock_count;
63 unsigned int smp_lock_pc;
64#else
65 int dummy; /* f'in gcc bug... */
66#endif
67};
68
69#endif /* !(__ASSEMBLY__) */
70
71#ifndef CONFIG_DEBUG_SPINLOCK
72#define INIT_THREAD { \
73 0, \
74}
75#else /* CONFIG_DEBUG_SPINLOCK */
76#define INIT_THREAD { \
77/* smp_lock_count, smp_lock_pc, */ \
78 0, 0, \
79}
80#endif /* !(CONFIG_DEBUG_SPINLOCK) */
81
82#ifndef __ASSEMBLY__
83
84#include <linux/types.h>
85#include <asm/fpumacro.h>
86
87struct task_struct;
88
89/* On Uniprocessor, even in RMO processes see TSO semantics */
90#ifdef CONFIG_SMP
91#define TSTATE_INITIAL_MM TSTATE_TSO
92#else
93#define TSTATE_INITIAL_MM TSTATE_RMO
94#endif
95
96/* Do necessary setup to start up a newly executed thread. */
97#define start_thread(regs, pc, sp) \
98do { \
99 unsigned long __asi = ASI_PNF; \
100 regs->tstate = (regs->tstate & (TSTATE_CWP)) | (TSTATE_INITIAL_MM|TSTATE_IE) | (__asi << 24UL); \
101 regs->tpc = ((pc & (~3)) - 4); \
102 regs->tnpc = regs->tpc + 4; \
103 regs->y = 0; \
104 set_thread_wstate(1 << 3); \
105 if (current_thread_info()->utraps) { \
106 if (*(current_thread_info()->utraps) < 2) \
107 kfree(current_thread_info()->utraps); \
108 else \
109 (*(current_thread_info()->utraps))--; \
110 current_thread_info()->utraps = NULL; \
111 } \
112 __asm__ __volatile__( \
113 "stx %%g0, [%0 + %2 + 0x00]\n\t" \
114 "stx %%g0, [%0 + %2 + 0x08]\n\t" \
115 "stx %%g0, [%0 + %2 + 0x10]\n\t" \
116 "stx %%g0, [%0 + %2 + 0x18]\n\t" \
117 "stx %%g0, [%0 + %2 + 0x20]\n\t" \
118 "stx %%g0, [%0 + %2 + 0x28]\n\t" \
119 "stx %%g0, [%0 + %2 + 0x30]\n\t" \
120 "stx %%g0, [%0 + %2 + 0x38]\n\t" \
121 "stx %%g0, [%0 + %2 + 0x40]\n\t" \
122 "stx %%g0, [%0 + %2 + 0x48]\n\t" \
123 "stx %%g0, [%0 + %2 + 0x50]\n\t" \
124 "stx %%g0, [%0 + %2 + 0x58]\n\t" \
125 "stx %%g0, [%0 + %2 + 0x60]\n\t" \
126 "stx %%g0, [%0 + %2 + 0x68]\n\t" \
127 "stx %1, [%0 + %2 + 0x70]\n\t" \
128 "stx %%g0, [%0 + %2 + 0x78]\n\t" \
129 "wrpr %%g0, (1 << 3), %%wstate\n\t" \
130 : \
131 : "r" (regs), "r" (sp - sizeof(struct reg_window) - STACK_BIAS), \
132 "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
133 fprs_write(0); \
134 current_thread_info()->xfsr[0] = 0; \
135 current_thread_info()->fpsaved[0] = 0; \
136 regs->tstate &= ~TSTATE_PEF; \
137} while (0)
138
139#define start_thread32(regs, pc, sp) \
140do { \
141 unsigned long __asi = ASI_PNF; \
142 pc &= 0x00000000ffffffffUL; \
143 sp &= 0x00000000ffffffffUL; \
144 regs->tstate = (regs->tstate & (TSTATE_CWP))|(TSTATE_INITIAL_MM|TSTATE_IE|TSTATE_AM) | (__asi << 24UL); \
145 regs->tpc = ((pc & (~3)) - 4); \
146 regs->tnpc = regs->tpc + 4; \
147 regs->y = 0; \
148 set_thread_wstate(2 << 3); \
149 if (current_thread_info()->utraps) { \
150 if (*(current_thread_info()->utraps) < 2) \
151 kfree(current_thread_info()->utraps); \
152 else \
153 (*(current_thread_info()->utraps))--; \
154 current_thread_info()->utraps = NULL; \
155 } \
156 __asm__ __volatile__( \
157 "stx %%g0, [%0 + %2 + 0x00]\n\t" \
158 "stx %%g0, [%0 + %2 + 0x08]\n\t" \
159 "stx %%g0, [%0 + %2 + 0x10]\n\t" \
160 "stx %%g0, [%0 + %2 + 0x18]\n\t" \
161 "stx %%g0, [%0 + %2 + 0x20]\n\t" \
162 "stx %%g0, [%0 + %2 + 0x28]\n\t" \
163 "stx %%g0, [%0 + %2 + 0x30]\n\t" \
164 "stx %%g0, [%0 + %2 + 0x38]\n\t" \
165 "stx %%g0, [%0 + %2 + 0x40]\n\t" \
166 "stx %%g0, [%0 + %2 + 0x48]\n\t" \
167 "stx %%g0, [%0 + %2 + 0x50]\n\t" \
168 "stx %%g0, [%0 + %2 + 0x58]\n\t" \
169 "stx %%g0, [%0 + %2 + 0x60]\n\t" \
170 "stx %%g0, [%0 + %2 + 0x68]\n\t" \
171 "stx %1, [%0 + %2 + 0x70]\n\t" \
172 "stx %%g0, [%0 + %2 + 0x78]\n\t" \
173 "wrpr %%g0, (2 << 3), %%wstate\n\t" \
174 : \
175 : "r" (regs), "r" (sp - sizeof(struct reg_window32)), \
176 "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
177 fprs_write(0); \
178 current_thread_info()->xfsr[0] = 0; \
179 current_thread_info()->fpsaved[0] = 0; \
180 regs->tstate &= ~TSTATE_PEF; \
181} while (0)
182
183/* Free all resources held by a thread. */
184#define release_thread(tsk) do { } while (0)
185
186unsigned long get_wchan(struct task_struct *task);
187
188#define task_pt_regs(tsk) (task_thread_info(tsk)->kregs)
189#define KSTK_EIP(tsk) (task_pt_regs(tsk)->tpc)
190#define KSTK_ESP(tsk) (task_pt_regs(tsk)->u_regs[UREG_FP])
191
192/* Please see the commentary in asm/backoff.h for a description of
193 * what these instructions are doing and how they have been chosen.
194 * To make a long story short, we are trying to yield the current cpu
195 * strand during busy loops.
196 */
197#ifdef BUILD_VDSO
198#define cpu_relax() asm volatile("\n99:\n\t" \
199 "rd %%ccr, %%g0\n\t" \
200 "rd %%ccr, %%g0\n\t" \
201 "rd %%ccr, %%g0\n\t" \
202 ::: "memory")
203#else /* ! BUILD_VDSO */
204#define cpu_relax() asm volatile("\n99:\n\t" \
205 "rd %%ccr, %%g0\n\t" \
206 "rd %%ccr, %%g0\n\t" \
207 "rd %%ccr, %%g0\n\t" \
208 ".section .pause_3insn_patch,\"ax\"\n\t"\
209 ".word 99b\n\t" \
210 "wr %%g0, 128, %%asr27\n\t" \
211 "nop\n\t" \
212 "nop\n\t" \
213 ".previous" \
214 ::: "memory")
215#endif
216
217/* Prefetch support. This is tuned for UltraSPARC-III and later.
218 * UltraSPARC-I will treat these as nops, and UltraSPARC-II has
219 * a shallower prefetch queue than later chips.
220 */
221#define ARCH_HAS_PREFETCH
222#define ARCH_HAS_PREFETCHW
223#define ARCH_HAS_SPINLOCK_PREFETCH
224
225static inline void prefetch(const void *x)
226{
227 /* We do not use the read prefetch mnemonic because that
228 * prefetches into the prefetch-cache which only is accessible
229 * by floating point operations in UltraSPARC-III and later.
230 * By contrast, "#one_write" prefetches into the L2 cache
231 * in shared state.
232 */
233 __asm__ __volatile__("prefetch [%0], #one_write"
234 : /* no outputs */
235 : "r" (x));
236}
237
238static inline void prefetchw(const void *x)
239{
240 /* The most optimal prefetch to use for writes is
241 * "#n_writes". This brings the cacheline into the
242 * L2 cache in "owned" state.
243 */
244 __asm__ __volatile__("prefetch [%0], #n_writes"
245 : /* no outputs */
246 : "r" (x));
247}
248
249#define spin_lock_prefetch(x) prefetchw(x)
250
251#define HAVE_ARCH_PICK_MMAP_LAYOUT
252
253int do_mathemu(struct pt_regs *regs, struct fpustate *f, bool illegal_insn_trap);
254
255#endif /* !(__ASSEMBLY__) */
256
257#endif /* !(__ASM_SPARC64_PROCESSOR_H) */