diff options
Diffstat (limited to 'arch/arm/mach-ebsa110/include/mach/system.h')
-rw-r--r-- | arch/arm/mach-ebsa110/include/mach/system.h | 37 |
1 files changed, 0 insertions, 37 deletions
diff --git a/arch/arm/mach-ebsa110/include/mach/system.h b/arch/arm/mach-ebsa110/include/mach/system.h deleted file mode 100644 index 2e4af65edb6f..000000000000 --- a/arch/arm/mach-ebsa110/include/mach/system.h +++ /dev/null | |||
@@ -1,37 +0,0 @@ | |||
1 | /* | ||
2 | * arch/arm/mach-ebsa110/include/mach/system.h | ||
3 | * | ||
4 | * Copyright (C) 1996-2000 Russell King. | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License version 2 as | ||
8 | * published by the Free Software Foundation. | ||
9 | */ | ||
10 | #ifndef __ASM_ARCH_SYSTEM_H | ||
11 | #define __ASM_ARCH_SYSTEM_H | ||
12 | |||
13 | /* | ||
14 | * EBSA110 idling methodology: | ||
15 | * | ||
16 | * We can not execute the "wait for interrupt" instruction since that | ||
17 | * will stop our MCLK signal (which provides the clock for the glue | ||
18 | * logic, and therefore the timer interrupt). | ||
19 | * | ||
20 | * Instead, we spin, polling the IRQ_STAT register for the occurrence | ||
21 | * of any interrupt with core clock down to the memory clock. | ||
22 | */ | ||
23 | static inline void arch_idle(void) | ||
24 | { | ||
25 | const char *irq_stat = (char *)0xff000000; | ||
26 | |||
27 | /* disable clock switching */ | ||
28 | asm volatile ("mcr p15, 0, ip, c15, c2, 2" : : : "cc"); | ||
29 | |||
30 | /* wait for an interrupt to occur */ | ||
31 | while (!*irq_stat); | ||
32 | |||
33 | /* enable clock switching */ | ||
34 | asm volatile ("mcr p15, 0, ip, c15, c1, 2" : : : "cc"); | ||
35 | } | ||
36 | |||
37 | #endif | ||