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authorHaavard Skinnemoen <hskinnemoen@atmel.com>2008-02-24 13:51:38 +0100
committerHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2008-07-02 11:05:01 +0200
commit02a00cf672a37292c31bbdde191712bfa40a4f1d (patch)
tree5588f7cd600056861fe1313abe7b47b9c051eab6 /include/asm-avr32
parentaa8e87ca619a3d1944874e85d74fda90607c73b9 (diff)
avr32: Power Management support ("standby" and "mem" modes)
Implement Standby support. In this mode, we'll suspend all drivers, put the SDRAM in self-refresh mode and switch off the HSB bus ("frozen" mode.) Implement Suspend-to-mem support. In this mode, we suspend all drivers, put the SDRAM into self-refresh mode and switch off all internal clocks except the 32 kHz oscillator ("stop" mode.) The lowest-level suspend code runs from a small portion of SRAM allocated at startup time. This gets rid of a small potential race with the SDRAM where we might try to enter self-refresh mode in the middle of an icache burst. We also relocate all interrupt and exception handlers to SRAM during the small window when we enter and exit the low-power modes. We don't need to do any special tricks to start and stop the PLL. The main clock is automatically gated by hardware until the PLL is stable. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Diffstat (limited to 'include/asm-avr32')
-rw-r--r--include/asm-avr32/arch-at32ap/pm.h3
-rw-r--r--include/asm-avr32/thread_info.h1
2 files changed, 4 insertions, 0 deletions
diff --git a/include/asm-avr32/arch-at32ap/pm.h b/include/asm-avr32/arch-at32ap/pm.h
index 356e4306490..979b355b77b 100644
--- a/include/asm-avr32/arch-at32ap/pm.h
+++ b/include/asm-avr32/arch-at32ap/pm.h
@@ -19,6 +19,7 @@
#ifndef __ASSEMBLY__
extern void cpu_enter_idle(void);
+extern void cpu_enter_standby(unsigned long sdramc_base);
extern bool disable_idle_sleep;
@@ -43,6 +44,8 @@ static inline void cpu_idle_sleep(void)
else
cpu_enter_idle();
}
+
+void intc_set_suspend_handler(unsigned long offset);
#endif
#endif /* __ASM_AVR32_ARCH_PM_H */
diff --git a/include/asm-avr32/thread_info.h b/include/asm-avr32/thread_info.h
index 07049f6c0d4..df68631b7b2 100644
--- a/include/asm-avr32/thread_info.h
+++ b/include/asm-avr32/thread_info.h
@@ -88,6 +88,7 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_MEMDIE 6
#define TIF_RESTORE_SIGMASK 7 /* restore signal mask in do_signal */
#define TIF_CPU_GOING_TO_SLEEP 8 /* CPU is entering sleep 0 mode */
+#define TIF_FREEZE 29
#define TIF_DEBUG 30 /* debugging enabled */
#define TIF_USERSPACE 31 /* true if FS sets userspace */