powerpc: Unify the 32 and 64 bit idle loops

This unifies the 32-bit (ARCH=ppc and ARCH=powerpc) and 64-bit idle
loops.  It brings over the concept of having a ppc_md.power_save
function from 32-bit to ARCH=powerpc, which lets us get rid of
native_idle().  With this we will also be able to simplify the idle
handling for pSeries and cell.

Signed-off-by: Paul Mackerras <paulus@samba.org>

3 files changed, 13 insertions, 6 deletions

diff --git a/include/asm-powerpc/machdep.h b/include/asm-powerpc/machdep.h
index 5348b820788c..21c8dc90d175 100644
--- a/include/asm-powerpc/machdep.h
+++ b/include/asm-powerpc/machdep.h
@@ -158,6 +158,12 @@ struct machdep_calls {
         /* Idle loop for this platform, leave empty for default idle loop */
         void            (*idle_loop)(void);
 
+        /*
+         * Function for waiting for work with reduced power in idle loop;
+         * called with interrupts disabled.
+         */
+        void            (*power_save)(void);
+
         /* Function to enable performance monitor counters for this
            platform, called once per cpu. */
         void            (*enable_pmcs)(void);
@@ -170,9 +176,6 @@ struct machdep_calls {
            May be NULL. */
         void            (*init)(void);
 
-        void            (*idle)(void);
-        void            (*power_save)(void);
-
         void            (*heartbeat)(void);
         unsigned long   heartbeat_reset;
         unsigned long   heartbeat_count;
@@ -242,8 +245,8 @@ struct machdep_calls {
 #endif /* CONFIG_KEXEC */
 };
 
-extern void default_idle(void);
-extern void native_idle(void);
+extern void power4_idle(void);
+extern void ppc6xx_idle(void);
 
 extern struct machdep_calls ppc_md;
 extern char cmd_line[COMMAND_LINE_SIZE];
diff --git a/include/asm-powerpc/reg.h b/include/asm-powerpc/reg.h
index 72bfe3af0460..bd467bf5cf5a 100644
--- a/include/asm-powerpc/reg.h
+++ b/include/asm-powerpc/reg.h
@@ -622,6 +622,10 @@ extern void ppc64_runlatch_off(void);
 extern unsigned long scom970_read(unsigned int address);
 extern void scom970_write(unsigned int address, unsigned long value);
 
+#else
+#define ppc64_runlatch_on()
+#define ppc64_runlatch_off()
+
 #endif /* CONFIG_PPC64 */
 
 #define __get_SP()      ({unsigned long sp; \
diff --git a/include/asm-ppc/machdep.h b/include/asm-ppc/machdep.h
index a3e8a45e45a9..ebbef64e8985 100644
--- a/include/asm-ppc/machdep.h
+++ b/include/asm-ppc/machdep.h
@@ -44,7 +44,7 @@ struct machdep_calls {
         void            (*power_off)(void);
         void            (*halt)(void);
 
-        void            (*idle)(void);
+        void            (*idle_loop)(void);
         void            (*power_save)(void);
 
         long            (*time_init)(void); /* Optional, may be NULL */