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1/* include/asm/processor.h
2 *
3 * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu)
4 */
5
6#ifndef __ASM_SPARC_PROCESSOR_H
7#define __ASM_SPARC_PROCESSOR_H
8
9/*
10 * Sparc32 implementation of macro that returns current
11 * instruction pointer ("program counter").
12 */
13#define current_text_addr() ({ void *pc; __asm__("sethi %%hi(1f), %0; or %0, %%lo(1f), %0;\n1:" : "=r" (pc)); pc; })
14
15#include <asm/psr.h>
16#include <asm/ptrace.h>
17#include <asm/head.h>
18#include <asm/signal.h>
19#include <asm/btfixup.h>
20#include <asm/page.h>
21
22/*
23 * The sparc has no problems with write protection
24 */
25#define wp_works_ok 1
26#define wp_works_ok__is_a_macro /* for versions in ksyms.c */
27
28/* Whee, this is STACK_TOP + PAGE_SIZE and the lowest kernel address too...
29 * That one page is used to protect kernel from intruders, so that
30 * we can make our access_ok test faster
31 */
32#define TASK_SIZE PAGE_OFFSET
33#ifdef __KERNEL__
34#define STACK_TOP (PAGE_OFFSET - PAGE_SIZE)
35#define STACK_TOP_MAX STACK_TOP
36#endif /* __KERNEL__ */
37
38struct task_struct;
39
40#ifdef __KERNEL__
41struct fpq {
42 unsigned long *insn_addr;
43 unsigned long insn;
44};
45#endif
46
47typedef struct {
48 int seg;
49} mm_segment_t;
50
51/* The Sparc processor specific thread struct. */
52struct thread_struct {
53 struct pt_regs *kregs;
54 unsigned int _pad1;
55
56 /* Special child fork kpsr/kwim values. */
57 unsigned long fork_kpsr __attribute__ ((aligned (8)));
58 unsigned long fork_kwim;
59
60 /* Floating point regs */
61 unsigned long float_regs[32] __attribute__ ((aligned (8)));
62 unsigned long fsr;
63 unsigned long fpqdepth;
64 struct fpq fpqueue[16];
65 unsigned long flags;
66 mm_segment_t current_ds;
67};
68
69#define SPARC_FLAG_KTHREAD 0x1 /* task is a kernel thread */
70#define SPARC_FLAG_UNALIGNED 0x2 /* is allowed to do unaligned accesses */
71
72#define INIT_THREAD { \
73 .flags = SPARC_FLAG_KTHREAD, \
74 .current_ds = KERNEL_DS, \
75}
76
77/* Return saved PC of a blocked thread. */
78extern unsigned long thread_saved_pc(struct task_struct *t);
79
80/* Do necessary setup to start up a newly executed thread. */
81static inline void start_thread(struct pt_regs * regs, unsigned long pc,
82 unsigned long sp)
83{
84 register unsigned long zero asm("g1");
85
86 regs->psr = (regs->psr & (PSR_CWP)) | PSR_S;
87 regs->pc = ((pc & (~3)) - 4);
88 regs->npc = regs->pc + 4;
89 regs->y = 0;
90 zero = 0;
91 __asm__ __volatile__("std\t%%g0, [%0 + %3 + 0x00]\n\t"
92 "std\t%%g0, [%0 + %3 + 0x08]\n\t"
93 "std\t%%g0, [%0 + %3 + 0x10]\n\t"
94 "std\t%%g0, [%0 + %3 + 0x18]\n\t"
95 "std\t%%g0, [%0 + %3 + 0x20]\n\t"
96 "std\t%%g0, [%0 + %3 + 0x28]\n\t"
97 "std\t%%g0, [%0 + %3 + 0x30]\n\t"
98 "st\t%1, [%0 + %3 + 0x38]\n\t"
99 "st\t%%g0, [%0 + %3 + 0x3c]"
100 : /* no outputs */
101 : "r" (regs),
102 "r" (sp - sizeof(struct reg_window32)),
103 "r" (zero),
104 "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))
105 : "memory");
106}
107
108/* Free all resources held by a thread. */
109#define release_thread(tsk) do { } while(0)
110extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
111
112/* Prepare to copy thread state - unlazy all lazy status */
113#define prepare_to_copy(tsk) do { } while (0)
114
115extern unsigned long get_wchan(struct task_struct *);
116
117#define task_pt_regs(tsk) ((tsk)->thread.kregs)
118#define KSTK_EIP(tsk) ((tsk)->thread.kregs->pc)
119#define KSTK_ESP(tsk) ((tsk)->thread.kregs->u_regs[UREG_FP])
120
121#ifdef __KERNEL__
122
123extern struct task_struct *last_task_used_math;
124
125#define cpu_relax() barrier()
126
127#endif
128
129#endif /* __ASM_SPARC_PROCESSOR_H */
1/* include/asm/processor.h
2 *
3 * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu)
4 */
5
6#ifndef __ASM_SPARC_PROCESSOR_H
7#define __ASM_SPARC_PROCESSOR_H
8
9/*
10 * Sparc32 implementation of macro that returns current
11 * instruction pointer ("program counter").
12 */
13#define current_text_addr() ({ void *pc; __asm__("sethi %%hi(1f), %0; or %0, %%lo(1f), %0;\n1:" : "=r" (pc)); pc; })
14
15#include <asm/psr.h>
16#include <asm/ptrace.h>
17#include <asm/head.h>
18#include <asm/signal.h>
19#include <asm/page.h>
20
21/*
22 * The sparc has no problems with write protection
23 */
24#define wp_works_ok 1
25#define wp_works_ok__is_a_macro /* for versions in ksyms.c */
26
27/* Whee, this is STACK_TOP + PAGE_SIZE and the lowest kernel address too...
28 * That one page is used to protect kernel from intruders, so that
29 * we can make our access_ok test faster
30 */
31#define TASK_SIZE PAGE_OFFSET
32#ifdef __KERNEL__
33#define STACK_TOP (PAGE_OFFSET - PAGE_SIZE)
34#define STACK_TOP_MAX STACK_TOP
35#endif /* __KERNEL__ */
36
37struct task_struct;
38
39#ifdef __KERNEL__
40struct fpq {
41 unsigned long *insn_addr;
42 unsigned long insn;
43};
44#endif
45
46typedef struct {
47 int seg;
48} mm_segment_t;
49
50/* The Sparc processor specific thread struct. */
51struct thread_struct {
52 struct pt_regs *kregs;
53 unsigned int _pad1;
54
55 /* Special child fork kpsr/kwim values. */
56 unsigned long fork_kpsr __attribute__ ((aligned (8)));
57 unsigned long fork_kwim;
58
59 /* Floating point regs */
60 unsigned long float_regs[32] __attribute__ ((aligned (8)));
61 unsigned long fsr;
62 unsigned long fpqdepth;
63 struct fpq fpqueue[16];
64 unsigned long flags;
65 mm_segment_t current_ds;
66};
67
68#define SPARC_FLAG_KTHREAD 0x1 /* task is a kernel thread */
69#define SPARC_FLAG_UNALIGNED 0x2 /* is allowed to do unaligned accesses */
70
71#define INIT_THREAD { \
72 .flags = SPARC_FLAG_KTHREAD, \
73 .current_ds = KERNEL_DS, \
74}
75
76/* Return saved PC of a blocked thread. */
77extern unsigned long thread_saved_pc(struct task_struct *t);
78
79/* Do necessary setup to start up a newly executed thread. */
80static inline void start_thread(struct pt_regs * regs, unsigned long pc,
81 unsigned long sp)
82{
83 register unsigned long zero asm("g1");
84
85 regs->psr = (regs->psr & (PSR_CWP)) | PSR_S;
86 regs->pc = ((pc & (~3)) - 4);
87 regs->npc = regs->pc + 4;
88 regs->y = 0;
89 zero = 0;
90 __asm__ __volatile__("std\t%%g0, [%0 + %3 + 0x00]\n\t"
91 "std\t%%g0, [%0 + %3 + 0x08]\n\t"
92 "std\t%%g0, [%0 + %3 + 0x10]\n\t"
93 "std\t%%g0, [%0 + %3 + 0x18]\n\t"
94 "std\t%%g0, [%0 + %3 + 0x20]\n\t"
95 "std\t%%g0, [%0 + %3 + 0x28]\n\t"
96 "std\t%%g0, [%0 + %3 + 0x30]\n\t"
97 "st\t%1, [%0 + %3 + 0x38]\n\t"
98 "st\t%%g0, [%0 + %3 + 0x3c]"
99 : /* no outputs */
100 : "r" (regs),
101 "r" (sp - sizeof(struct reg_window32)),
102 "r" (zero),
103 "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))
104 : "memory");
105}
106
107/* Free all resources held by a thread. */
108#define release_thread(tsk) do { } while(0)
109
110extern unsigned long get_wchan(struct task_struct *);
111
112#define task_pt_regs(tsk) ((tsk)->thread.kregs)
113#define KSTK_EIP(tsk) ((tsk)->thread.kregs->pc)
114#define KSTK_ESP(tsk) ((tsk)->thread.kregs->u_regs[UREG_FP])
115
116#ifdef __KERNEL__
117
118extern struct task_struct *last_task_used_math;
119
120#define cpu_relax() barrier()
121extern void (*sparc_idle)(void);
122
123#endif
124
125#endif /* __ASM_SPARC_PROCESSOR_H */