[POWERPC] pasemi: Idle loops

Powersave support on PA6T. Right now it only uses 'doze' mode, and
will default to no savings (spin).

Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>

3 files changed, 49 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index d2ded19e4064..8120d428ebfd 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -17,6 +17,7 @@ obj-y				+= vdso32/
 obj-$(CONFIG_PPC64)             += setup_64.o binfmt_elf32.o sys_ppc32.o \
                                    signal_64.o ptrace32.o \
                                    paca.o cpu_setup_ppc970.o \
+                                   cpu_setup_pa6t.o \
                                    firmware.o sysfs.o nvram_64.o
 obj-$(CONFIG_PPC64)             += vdso64/
 obj-$(CONFIG_ALTIVEC)           += vecemu.o vector.o
diff --git a/arch/powerpc/kernel/cpu_setup_pa6t.S b/arch/powerpc/kernel/cpu_setup_pa6t.S
new file mode 100644
index 000000000000..4047be25c4d2
--- /dev/null
+++ b/arch/powerpc/kernel/cpu_setup_pa6t.S
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2006-2007 PA Semi, Inc
+ *
+ * Maintained by: Olof Johansson <olof@lixom.net>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+
+#include <asm/processor.h>
+#include <asm/page.h>
+#include <asm/cputable.h>
+#include <asm/ppc_asm.h>
+#include <asm/asm-offsets.h>
+#include <asm/cache.h>
+
+/* Right now, restore and setup are the same thing */
+_GLOBAL(__restore_cpu_pa6t)
+_GLOBAL(__setup_cpu_pa6t)
+        /* Do nothing if not running in HV mode */
+        mfmsr   r0
+        rldicl. r0,r0,4,63
+        beqlr
+
+        mfspr   r0,SPRN_HID5
+        ori     r0,r0,0x30
+        mtspr   SPRN_HID5,r0
+
+        mfspr   r0,SPRN_LPCR
+        ori     r0,r0,0x7000
+        mtspr   SPRN_LPCR,r0
+
+        blr
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 4939b3d56dfb..dd17dffbf058 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -43,6 +43,8 @@ extern void __setup_cpu_745x(unsigned long offset, struct cpu_spec* spec);
 #ifdef CONFIG_PPC64
 extern void __setup_cpu_ppc970(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_ppc970MP(unsigned long offset, struct cpu_spec* spec);
+extern void __setup_cpu_pa6t(unsigned long offset, struct cpu_spec* spec);
+extern void __restore_cpu_pa6t(unsigned long offset, struct cpu_spec* spec);
 extern void __restore_cpu_ppc970(void);
 #endif /* CONFIG_PPC64 */
 
@@ -369,6 +371,8 @@ static struct cpu_spec cpu_specs[] = {
                 .dcache_bsize           = 64,
                 .num_pmcs               = 6,
                 .pmc_type               = PPC_PMC_PA6T,
+                .cpu_setup              = __setup_cpu_pa6t,
+                .cpu_restore            = __restore_cpu_pa6t,
                 .platform               = "pa6t",
         },
         {       /* default match */