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-rw-r--r--include/asm-m32r/system.h71
1 files changed, 23 insertions, 48 deletions
diff --git a/include/asm-m32r/system.h b/include/asm-m32r/system.h
index d6a2c613be68..e55013f378e5 100644
--- a/include/asm-m32r/system.h
+++ b/include/asm-m32r/system.h
@@ -6,8 +6,8 @@
6 * License. See the file "COPYING" in the main directory of this archive 6 * License. See the file "COPYING" in the main directory of this archive
7 * for more details. 7 * for more details.
8 * 8 *
9 * Copyright (C) 2001 by Hiroyuki Kondo, Hirokazu Takata, and Hitoshi Yamamoto 9 * Copyright (C) 2001 Hiroyuki Kondo, Hirokazu Takata, and Hitoshi Yamamoto
10 * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org> 10 * Copyright (C) 2004, 2006 Hirokazu Takata <takata at linux-m32r.org>
11 */ 11 */
12 12
13#include <linux/config.h> 13#include <linux/config.h>
@@ -19,53 +19,28 @@
19 * switch_to(prev, next) should switch from task `prev' to `next' 19 * switch_to(prev, next) should switch from task `prev' to `next'
20 * `prev' will never be the same as `next'. 20 * `prev' will never be the same as `next'.
21 * 21 *
22 * `next' and `prev' should be struct task_struct, but it isn't always defined 22 * `next' and `prev' should be task_t, but it isn't always defined
23 */ 23 */
24 24
25#ifndef CONFIG_SMP
26#define prepare_to_switch() do { } while(0)
27#endif /* not CONFIG_SMP */
28
29#define switch_to(prev, next, last) do { \ 25#define switch_to(prev, next, last) do { \
30 register unsigned long arg0 __asm__ ("r0") = (unsigned long)prev; \
31 register unsigned long arg1 __asm__ ("r1") = (unsigned long)next; \
32 register unsigned long *oldsp __asm__ ("r2") = &(prev->thread.sp); \
33 register unsigned long *newsp __asm__ ("r3") = &(next->thread.sp); \
34 register unsigned long *oldlr __asm__ ("r4") = &(prev->thread.lr); \
35 register unsigned long *newlr __asm__ ("r5") = &(next->thread.lr); \
36 register struct task_struct *__last __asm__ ("r6"); \
37 __asm__ __volatile__ ( \ 26 __asm__ __volatile__ ( \
38 "st r8, @-r15 \n\t" \ 27 " seth lr, #high(1f) \n" \
39 "st r9, @-r15 \n\t" \ 28 " or3 lr, lr, #low(1f) \n" \
40 "st r10, @-r15 \n\t" \ 29 " st lr, @%4 ; store old LR \n" \
41 "st r11, @-r15 \n\t" \ 30 " ld lr, @%5 ; load new LR \n" \
42 "st r12, @-r15 \n\t" \ 31 " st sp, @%2 ; store old SP \n" \
43 "st r13, @-r15 \n\t" \ 32 " ld sp, @%3 ; load new SP \n" \
44 "st r14, @-r15 \n\t" \ 33 " push %1 ; store `prev' on new stack \n" \
45 "seth r14, #high(1f) \n\t" \ 34 " jmp lr \n" \
46 "or3 r14, r14, #low(1f) \n\t" \ 35 " .fillinsn \n" \
47 "st r14, @r4 ; store old LR \n\t" \ 36 "1: \n" \
48 "st r15, @r2 ; store old SP \n\t" \ 37 " pop %0 ; restore `__last' from new stack \n" \
49 "ld r15, @r3 ; load new SP \n\t" \ 38 : "=r" (last) \
50 "st r0, @-r15 ; store 'prev' onto new stack \n\t" \ 39 : "0" (prev), \
51 "ld r14, @r5 ; load new LR \n\t" \ 40 "r" (&(prev->thread.sp)), "r" (&(next->thread.sp)), \
52 "jmp r14 \n\t" \ 41 "r" (&(prev->thread.lr)), "r" (&(next->thread.lr)) \
53 ".fillinsn \n " \ 42 : "memory", "lr" \
54 "1: \n\t" \
55 "ld r6, @r15+ ; load 'prev' from new stack \n\t" \
56 "ld r14, @r15+ \n\t" \
57 "ld r13, @r15+ \n\t" \
58 "ld r12, @r15+ \n\t" \
59 "ld r11, @r15+ \n\t" \
60 "ld r10, @r15+ \n\t" \
61 "ld r9, @r15+ \n\t" \
62 "ld r8, @r15+ \n\t" \
63 : "=&r" (__last) \
64 : "r" (arg0), "r" (arg1), "r" (oldsp), "r" (newsp), \
65 "r" (oldlr), "r" (newlr) \
66 : "memory" \
67 ); \ 43 ); \
68 last = __last; \
69} while(0) 44} while(0)
70 45
71/* 46/*
@@ -171,8 +146,8 @@ extern void __xchg_called_with_bad_pointer(void);
171#define DCACHE_CLEAR(reg0, reg1, addr) 146#define DCACHE_CLEAR(reg0, reg1, addr)
172#endif /* CONFIG_CHIP_M32700_TS1 */ 147#endif /* CONFIG_CHIP_M32700_TS1 */
173 148
174static __inline__ unsigned long __xchg(unsigned long x, volatile void * ptr, 149static inline unsigned long
175 int size) 150__xchg(unsigned long x, volatile void * ptr, int size)
176{ 151{
177 unsigned long flags; 152 unsigned long flags;
178 unsigned long tmp = 0; 153 unsigned long tmp = 0;
@@ -224,7 +199,7 @@ static __inline__ unsigned long __xchg(unsigned long x, volatile void * ptr,
224 199
225#define __HAVE_ARCH_CMPXCHG 1 200#define __HAVE_ARCH_CMPXCHG 1
226 201
227static __inline__ unsigned long 202static inline unsigned long
228__cmpxchg_u32(volatile unsigned int *p, unsigned int old, unsigned int new) 203__cmpxchg_u32(volatile unsigned int *p, unsigned int old, unsigned int new)
229{ 204{
230 unsigned long flags; 205 unsigned long flags;
@@ -258,7 +233,7 @@ __cmpxchg_u32(volatile unsigned int *p, unsigned int old, unsigned int new)
258 if something tries to do an invalid cmpxchg(). */ 233 if something tries to do an invalid cmpxchg(). */
259extern void __cmpxchg_called_with_bad_pointer(void); 234extern void __cmpxchg_called_with_bad_pointer(void);
260 235
261static __inline__ unsigned long 236static inline unsigned long
262__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size) 237__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
263{ 238{
264 switch (size) { 239 switch (size) {
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-21 07:47:06 -0500