aboutsummaryrefslogtreecommitdiffstats
path: root/arch/c6x/include/asm/system.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/c6x/include/asm/system.h')
-rw-r--r--arch/c6x/include/asm/system.h173
1 files changed, 6 insertions, 167 deletions
diff --git a/arch/c6x/include/asm/system.h b/arch/c6x/include/asm/system.h
index e076dc0eacc8..ccc4f86d16c5 100644
--- a/arch/c6x/include/asm/system.h
+++ b/arch/c6x/include/asm/system.h
@@ -1,168 +1,7 @@
1/* 1/* FILE TO BE DELETED. DO NOT ADD STUFF HERE! */
2 * Port on Texas Instruments TMS320C6x architecture 2#include <asm/barrier.h>
3 * 3#include <asm/cmpxchg.h>
4 * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated 4#include <asm/exec.h>
5 * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) 5#include <asm/special_insns.h>
6 * 6#include <asm/switch_to.h>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#ifndef _ASM_C6X_SYSTEM_H
12#define _ASM_C6X_SYSTEM_H
13
14#include <linux/linkage.h>
15#include <linux/irqflags.h>
16
17#define prepare_to_switch() do { } while (0)
18
19struct task_struct;
20struct thread_struct;
21asmlinkage void *__switch_to(struct thread_struct *prev,
22 struct thread_struct *next,
23 struct task_struct *tsk);
24
25#define switch_to(prev, next, last) \
26 do { \
27 current->thread.wchan = (u_long) __builtin_return_address(0); \
28 (last) = __switch_to(&(prev)->thread, \
29 &(next)->thread, (prev)); \
30 mb(); \
31 current->thread.wchan = 0; \
32 } while (0)
33
34/* Reset the board */
35#define HARD_RESET_NOW()
36
37#define get_creg(reg) \
38 ({ unsigned int __x; \
39 asm volatile ("mvc .s2 " #reg ",%0\n" : "=b"(__x)); __x; })
40
41#define set_creg(reg, v) \
42 do { unsigned int __x = (unsigned int)(v); \
43 asm volatile ("mvc .s2 %0," #reg "\n" : : "b"(__x)); \
44 } while (0)
45
46#define or_creg(reg, n) \
47 do { unsigned __x, __n = (unsigned)(n); \
48 asm volatile ("mvc .s2 " #reg ",%0\n" \
49 "or .l2 %1,%0,%0\n" \
50 "mvc .s2 %0," #reg "\n" \
51 "nop\n" \
52 : "=&b"(__x) : "b"(__n)); \
53 } while (0)
54
55#define and_creg(reg, n) \
56 do { unsigned __x, __n = (unsigned)(n); \
57 asm volatile ("mvc .s2 " #reg ",%0\n" \
58 "and .l2 %1,%0,%0\n" \
59 "mvc .s2 %0," #reg "\n" \
60 "nop\n" \
61 : "=&b"(__x) : "b"(__n)); \
62 } while (0)
63
64#define get_coreid() (get_creg(DNUM) & 0xff)
65
66/* Set/get IST */
67#define set_ist(x) set_creg(ISTP, x)
68#define get_ist() get_creg(ISTP)
69
70/*
71 * Exception management
72 */
73asmlinkage void enable_exception(void);
74#define disable_exception()
75#define get_except_type() get_creg(EFR)
76#define ack_exception(type) set_creg(ECR, 1 << (type))
77#define get_iexcept() get_creg(IERR)
78#define set_iexcept(mask) set_creg(IERR, (mask))
79
80/*
81 * Misc. functions
82 */
83#define nop() asm("NOP\n");
84#define mb() barrier()
85#define rmb() barrier()
86#define wmb() barrier()
87#define set_mb(var, value) do { var = value; mb(); } while (0)
88#define set_wmb(var, value) do { var = value; wmb(); } while (0)
89
90#define smp_mb() barrier()
91#define smp_rmb() barrier()
92#define smp_wmb() barrier()
93#define smp_read_barrier_depends() do { } while (0)
94
95#define xchg(ptr, x) \
96 ((__typeof__(*(ptr)))__xchg((unsigned int)(x), (void *) (ptr), \
97 sizeof(*(ptr))))
98#define tas(ptr) xchg((ptr), 1)
99
100unsigned int _lmbd(unsigned int, unsigned int);
101unsigned int _bitr(unsigned int);
102
103struct __xchg_dummy { unsigned int a[100]; };
104#define __xg(x) ((volatile struct __xchg_dummy *)(x))
105
106static inline unsigned int __xchg(unsigned int x, volatile void *ptr, int size)
107{
108 unsigned int tmp;
109 unsigned long flags;
110
111 local_irq_save(flags);
112
113 switch (size) {
114 case 1:
115 tmp = 0;
116 tmp = *((unsigned char *) ptr);
117 *((unsigned char *) ptr) = (unsigned char) x;
118 break;
119 case 2:
120 tmp = 0;
121 tmp = *((unsigned short *) ptr);
122 *((unsigned short *) ptr) = x;
123 break;
124 case 4:
125 tmp = 0;
126 tmp = *((unsigned int *) ptr);
127 *((unsigned int *) ptr) = x;
128 break;
129 }
130 local_irq_restore(flags);
131 return tmp;
132}
133
134#include <asm-generic/cmpxchg-local.h>
135
136/*
137 * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
138 * them available.
139 */
140#define cmpxchg_local(ptr, o, n) \
141 ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), \
142 (unsigned long)(o), \
143 (unsigned long)(n), \
144 sizeof(*(ptr))))
145#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
146
147#include <asm-generic/cmpxchg.h>
148
149#define _extu(x, s, e) \
150 ({ unsigned int __x; \
151 asm volatile ("extu .S2 %3,%1,%2,%0\n" : \
152 "=b"(__x) : "n"(s), "n"(e), "b"(x)); \
153 __x; })
154
155
156extern unsigned int c6x_core_freq;
157
158struct pt_regs;
159
160extern void die(char *str, struct pt_regs *fp, int nr);
161extern asmlinkage int process_exception(struct pt_regs *regs);
162extern void time_init(void);
163extern void free_initmem(void); 7extern void free_initmem(void);
164
165extern void (*c6x_restart)(void);
166extern void (*c6x_halt)(void);
167
168#endif /* _ASM_C6X_SYSTEM_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-27 19:37:38 -0500