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Diffstat (limited to 'arch/mn10300/include/asm/system.h')
-rw-r--r--arch/mn10300/include/asm/system.h109
1 files changed, 1 insertions, 108 deletions
diff --git a/arch/mn10300/include/asm/system.h b/arch/mn10300/include/asm/system.h
index 3636c054dcd5..9f7c7e17c01e 100644
--- a/arch/mn10300/include/asm/system.h
+++ b/arch/mn10300/include/asm/system.h
@@ -17,6 +17,7 @@
17#ifndef __ASSEMBLY__ 17#ifndef __ASSEMBLY__
18 18
19#include <linux/kernel.h> 19#include <linux/kernel.h>
20#include <linux/irqflags.h>
20 21
21struct task_struct; 22struct task_struct;
22struct thread_struct; 23struct thread_struct;
@@ -81,114 +82,6 @@ do { \
81 82
82/*****************************************************************************/ 83/*****************************************************************************/
83/* 84/*
84 * interrupt control
85 * - "disabled": run in IM1/2
86 * - level 0 - GDB stub
87 * - level 1 - virtual serial DMA (if present)
88 * - level 5 - normal interrupt priority
89 * - level 6 - timer interrupt
90 * - "enabled": run in IM7
91 */
92#ifdef CONFIG_MN10300_TTYSM
93#define MN10300_CLI_LEVEL EPSW_IM_2
94#else
95#define MN10300_CLI_LEVEL EPSW_IM_1
96#endif
97
98#define local_save_flags(x) \
99do { \
100 typecheck(unsigned long, x); \
101 asm volatile( \
102 " mov epsw,%0 \n" \
103 : "=d"(x) \
104 ); \
105} while (0)
106
107#define local_irq_disable() \
108do { \
109 asm volatile( \
110 " and %0,epsw \n" \
111 " or %1,epsw \n" \
112 " nop \n" \
113 " nop \n" \
114 " nop \n" \
115 : \
116 : "i"(~EPSW_IM), "i"(EPSW_IE | MN10300_CLI_LEVEL) \
117 ); \
118} while (0)
119
120#define local_irq_save(x) \
121do { \
122 local_save_flags(x); \
123 local_irq_disable(); \
124} while (0)
125
126/*
127 * we make sure local_irq_enable() doesn't cause priority inversion
128 */
129#ifndef __ASSEMBLY__
130
131extern unsigned long __mn10300_irq_enabled_epsw;
132
133#endif
134
135#define local_irq_enable() \
136do { \
137 unsigned long tmp; \
138 \
139 asm volatile( \
140 " mov epsw,%0 \n" \
141 " and %1,%0 \n" \
142 " or %2,%0 \n" \
143 " mov %0,epsw \n" \
144 : "=&d"(tmp) \
145 : "i"(~EPSW_IM), "r"(__mn10300_irq_enabled_epsw) \
146 : "cc" \
147 ); \
148} while (0)
149
150#define local_irq_restore(x) \
151do { \
152 typecheck(unsigned long, x); \
153 asm volatile( \
154 " mov %0,epsw \n" \
155 " nop \n" \
156 " nop \n" \
157 " nop \n" \
158 : \
159 : "d"(x) \
160 : "memory", "cc" \
161 ); \
162} while (0)
163
164#define irqs_disabled() \
165({ \
166 unsigned long flags; \
167 local_save_flags(flags); \
168 (flags & EPSW_IM) <= MN10300_CLI_LEVEL; \
169})
170
171/* hook to save power by halting the CPU
172 * - called from the idle loop
173 * - must reenable interrupts (which takes three instruction cycles to complete)
174 */
175#define safe_halt() \
176do { \
177 asm volatile(" or %0,epsw \n" \
178 " nop \n" \
179 " nop \n" \
180 " bset %2,(%1) \n" \
181 : \
182 : "i"(EPSW_IE|EPSW_IM), "n"(&CPUM), "i"(CPUM_SLEEP)\
183 : "cc" \
184 ); \
185} while (0)
186
187#define STI or EPSW_IE|EPSW_IM,epsw
188#define CLI and ~EPSW_IM,epsw; or EPSW_IE|MN10300_CLI_LEVEL,epsw; nop; nop; nop
189
190/*****************************************************************************/
191/*
192 * MN10300 doesn't actually have an exchange instruction 85 * MN10300 doesn't actually have an exchange instruction
193 */ 86 */
194#ifndef __ASSEMBLY__ 87#ifndef __ASSEMBLY__