avr32: Move sleep code into mach-at32ap

Create a new file, pm-at32ap700x.S, in mach-at32ap and move the CPU
idle sleep code there. Make it possible to disable the sleep code.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/arch/avr32/mach-at32ap/pm-at32ap700x.S b/arch/avr32/mach-at32ap/pm-at32ap700x.S
new file mode 100644
index 000000000000..949e2485e278
--- /dev/null
+++ b/arch/avr32/mach-at32ap/pm-at32ap700x.S
@@ -0,0 +1,66 @@
+/*
+ * Low-level Power Management code.
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <asm/asm.h>
+#include <asm/asm-offsets.h>
+#include <asm/thread_info.h>
+#include <asm/arch/pm.h>
+
+        .section .bss, "wa", @nobits
+        .global disable_idle_sleep
+        .type   disable_idle_sleep, @object
+disable_idle_sleep:
+        .int    4
+        .size   disable_idle_sleep, . - disable_idle_sleep
+
+        /* Keep this close to the irq handlers */
+        .section .irq.text, "ax", @progbits
+
+        /*
+         * void cpu_enter_idle(void)
+         *
+         * Put the CPU into "idle" mode, in which it will consume
+         * significantly less power.
+         *
+         * If an interrupt comes along in the window between
+         * unmask_interrupts and the sleep instruction below, the
+         * interrupt code will adjust the return address so that we
+         * never execute the sleep instruction. This is required
+         * because the AP7000 doesn't unmask interrupts when entering
+         * sleep modes; later CPUs may not need this workaround.
+         */
+        .global cpu_enter_idle
+        .type   cpu_enter_idle, @function
+cpu_enter_idle:
+        mask_interrupts
+        get_thread_info r8
+        ld.w    r9, r8[TI_flags]
+        bld     r9, TIF_NEED_RESCHED
+        brcs    .Lret_from_sleep
+        sbr     r9, TIF_CPU_GOING_TO_SLEEP
+        st.w    r8[TI_flags], r9
+        unmask_interrupts
+        sleep   CPU_SLEEP_IDLE
+        .size   cpu_idle_sleep, . - cpu_idle_sleep
+
+        /*
+         * Common return path for PM functions that don't run from
+         * SRAM.
+         */
+        .global cpu_idle_skip_sleep
+        .type   cpu_idle_skip_sleep, @function
+cpu_idle_skip_sleep:
+        mask_interrupts
+        ld.w    r9, r8[TI_flags]
+        cbr     r9, TIF_CPU_GOING_TO_SLEEP
+        st.w    r8[TI_flags], r9
+.Lret_from_sleep:
+        unmask_interrupts
+        retal   r12
+        .size   cpu_idle_skip_sleep, . - cpu_idle_skip_sleep