Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=543b9fd3528f64c4b20439de0edb453764482de7
Commit: 543b9fd3528f64c4b20439de0edb453764482de7
Parent: 7e11580b362fc64693de7ad5c11fbf3d1d9d0e50
Author: Johannes Berg <[EMAIL PROTECTED]>
AuthorDate: Thu May 3 22:31:38 2007 +1000
Committer: Paul Mackerras <[EMAIL PROTECTED]>
CommitDate: Mon May 7 20:31:14 2007 +1000
[POWERPC] powermac: Suspend to disk on G5
Powermac G5 suspend to disk implementation. The code is platform
agnostic but only tested on powermac, no other 64-bit powerpc
machines.
Because nvidiafb still breaks suspend I have marked it EXPERIMENTAL on
powermac and because I can't test it and some lowlevel code will need
changes it is BROKEN on all other 64-bit platforms.
Signed-off-by: Johannes Berg <[EMAIL PROTECTED]>
Acked-by: Benjamin Herrenschmidt <[EMAIL PROTECTED]>
Signed-off-by: Paul Mackerras <[EMAIL PROTECTED]>
---
arch/powerpc/Kconfig | 5 +
arch/powerpc/kernel/Makefile | 1 +
arch/powerpc/kernel/asm-offsets.c | 4 +-
arch/powerpc/kernel/idle.c | 5 +-
arch/powerpc/kernel/swsusp.c | 9 ++
arch/powerpc/kernel/swsusp_64.c | 24 ++++
arch/powerpc/kernel/swsusp_asm64.S | 228 ++++++++++++++++++++++++++++++++++++
include/linux/suspend.h | 2 +-
kernel/power/Kconfig | 4 +-
9 files changed, 276 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index a8e08f4..49b1ea2 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -126,6 +126,11 @@ config DEFAULT_UIMAGE
Used to allow a board to specify it wants a uImage built by default
default n
+config PPC64_SWSUSP
+ bool
+ depends on PPC64 && (BROKEN || (PPC_PMAC64 && EXPERIMENTAL))
+ default y
+
menu "Processor support"
choice
prompt "Processor Type"
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 949f36a..4dc73b8 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_6xx) += idle_6xx.o l2cr_6xx.o
cpu_setup_6xx.o
obj-$(CONFIG_TAU) += tau_6xx.o
obj-$(CONFIG_SOFTWARE_SUSPEND) += swsusp.o
obj32-$(CONFIG_SOFTWARE_SUSPEND) += swsusp_32.o
+obj64-$(CONFIG_SOFTWARE_SUSPEND) += swsusp_64.o swsusp_asm64.o
obj32-$(CONFIG_MODULES) += module_32.o
ifeq ($(CONFIG_PPC_MERGE),y)
diff --git a/arch/powerpc/kernel/asm-offsets.c
b/arch/powerpc/kernel/asm-offsets.c
index 0c5150c..8f48560 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -21,12 +21,12 @@
#include <linux/types.h>
#include <linux/mman.h>
#include <linux/mm.h>
+#include <linux/suspend.h>
#ifdef CONFIG_PPC64
#include <linux/time.h>
#include <linux/hardirq.h>
#else
#include <linux/ptrace.h>
-#include <linux/suspend.h>
#endif
#include <asm/io.h>
@@ -257,11 +257,11 @@ int main(void)
DEFINE(CPU_SPEC_SETUP, offsetof(struct cpu_spec, cpu_setup));
DEFINE(CPU_SPEC_RESTORE, offsetof(struct cpu_spec, cpu_restore));
-#ifndef CONFIG_PPC64
DEFINE(pbe_address, offsetof(struct pbe, address));
DEFINE(pbe_orig_address, offsetof(struct pbe, orig_address));
DEFINE(pbe_next, offsetof(struct pbe, next));
+#ifndef CONFIG_PPC64
DEFINE(TASK_SIZE, TASK_SIZE);
DEFINE(NUM_USER_SEGMENTS, TASK_SIZE>>28);
#endif /* ! CONFIG_PPC64 */
diff --git a/arch/powerpc/kernel/idle.c b/arch/powerpc/kernel/idle.c
index 6e7f509..a9e9cbd 100644
--- a/arch/powerpc/kernel/idle.c
+++ b/arch/powerpc/kernel/idle.c
@@ -33,8 +33,11 @@
#include <asm/smp.h>
#ifdef CONFIG_HOTPLUG_CPU
+/* this is used for software suspend, and that shuts down
+ * CPUs even while the system is still booting... */
#define cpu_should_die() (cpu_is_offline(smp_processor_id()) && \
- system_state == SYSTEM_RUNNING)
+ (system_state == SYSTEM_RUNNING \
+ || system_state == SYSTEM_BOOTING))
#else
#define cpu_should_die() 0
#endif
diff --git a/arch/powerpc/kernel/swsusp.c b/arch/powerpc/kernel/swsusp.c
index b89e4f5..064a7ba 100644
--- a/arch/powerpc/kernel/swsusp.c
+++ b/arch/powerpc/kernel/swsusp.c
@@ -24,6 +24,11 @@ void save_processor_state(void)
flush_fp_to_thread(current);
flush_altivec_to_thread(current);
flush_spe_to_thread(current);
+
+#ifdef CONFIG_PPC64
+ hard_irq_disable();
+#endif
+
}
void restore_processor_state(void)
@@ -31,4 +36,8 @@ void restore_processor_state(void)
#ifdef CONFIG_PPC32
set_context(current->active_mm->context.id, current->active_mm->pgd);
#endif
+
+#ifdef CONFIG_PPC64
+ hard_irq_enable();
+#endif
}
diff --git a/arch/powerpc/kernel/swsusp_64.c b/arch/powerpc/kernel/swsusp_64.c
new file mode 100644
index 0000000..6f3f069
--- /dev/null
+++ b/arch/powerpc/kernel/swsusp_64.c
@@ -0,0 +1,24 @@
+/*
+ * PowerPC 64-bit swsusp implementation
+ *
+ * Copyright 2006 Johannes Berg <[EMAIL PROTECTED]>
+ *
+ * GPLv2
+ */
+
+#include <asm/system.h>
+#include <asm/iommu.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+
+void do_after_copyback(void)
+{
+ iommu_restore();
+ touch_softlockup_watchdog();
+ mb();
+}
+
+void _iommu_save(void)
+{
+ iommu_save();
+}
diff --git a/arch/powerpc/kernel/swsusp_asm64.S
b/arch/powerpc/kernel/swsusp_asm64.S
new file mode 100644
index 0000000..e092c3c
--- /dev/null
+++ b/arch/powerpc/kernel/swsusp_asm64.S
@@ -0,0 +1,228 @@
+/*
+ * PowerPC 64-bit swsusp implementation
+ *
+ * Copyright 2006 Johannes Berg <[EMAIL PROTECTED]>
+ *
+ * GPLv2
+ */
+
+#include <linux/threads.h>
+#include <asm/processor.h>
+#include <asm/page.h>
+#include <asm/cputable.h>
+#include <asm/thread_info.h>
+#include <asm/ppc_asm.h>
+#include <asm/asm-offsets.h>
+
+/*
+ * Structure for storing CPU registers on the save area.
+ */
+#define SL_r1 0x00 /* stack pointer */
+#define SL_PC 0x08
+#define SL_MSR 0x10
+#define SL_SDR1 0x18
+#define SL_XER 0x20
+#define SL_TB 0x40
+#define SL_r2 0x48
+#define SL_CR 0x50
+#define SL_LR 0x58
+#define SL_r12 0x60
+#define SL_r13 0x68
+#define SL_r14 0x70
+#define SL_r15 0x78
+#define SL_r16 0x80
+#define SL_r17 0x88
+#define SL_r18 0x90
+#define SL_r19 0x98
+#define SL_r20 0xa0
+#define SL_r21 0xa8
+#define SL_r22 0xb0
+#define SL_r23 0xb8
+#define SL_r24 0xc0
+#define SL_r25 0xc8
+#define SL_r26 0xd0
+#define SL_r27 0xd8
+#define SL_r28 0xe0
+#define SL_r29 0xe8
+#define SL_r30 0xf0
+#define SL_r31 0xf8
+#define SL_SIZE SL_r31+8
+
+/* these macros rely on the save area being
+ * pointed to by r11 */
+#define SAVE_SPECIAL(special) \
+ mf##special r0 ;\
+ std r0, SL_##special(r11)
+#define RESTORE_SPECIAL(special) \
+ ld r0, SL_##special(r11) ;\
+ mt##special r0
+#define SAVE_REGISTER(reg) \
+ std reg, SL_##reg(r11)
+#define RESTORE_REGISTER(reg) \
+ ld reg, SL_##reg(r11)
+
+/* space for storing cpu state */
+ .section .data
+ .align 5
+swsusp_save_area:
+ .space SL_SIZE
+
+ .section ".toc","aw"
+swsusp_save_area_ptr:
+ .tc swsusp_save_area[TC],swsusp_save_area
+restore_pblist_ptr:
+ .tc restore_pblist[TC],restore_pblist
+
+ .section .text
+ .align 5
+_GLOBAL(swsusp_arch_suspend)
+ ld r11,[EMAIL PROTECTED](r2)
+ SAVE_SPECIAL(LR)
+ SAVE_REGISTER(r1)
+ SAVE_SPECIAL(CR)
+ SAVE_SPECIAL(TB)
+ SAVE_REGISTER(r2)
+ SAVE_REGISTER(r12)
+ SAVE_REGISTER(r13)
+ SAVE_REGISTER(r14)
+ SAVE_REGISTER(r15)
+ SAVE_REGISTER(r16)
+ SAVE_REGISTER(r17)
+ SAVE_REGISTER(r18)
+ SAVE_REGISTER(r19)
+ SAVE_REGISTER(r20)
+ SAVE_REGISTER(r21)
+ SAVE_REGISTER(r22)
+ SAVE_REGISTER(r23)
+ SAVE_REGISTER(r24)
+ SAVE_REGISTER(r25)
+ SAVE_REGISTER(r26)
+ SAVE_REGISTER(r27)
+ SAVE_REGISTER(r28)
+ SAVE_REGISTER(r29)
+ SAVE_REGISTER(r30)
+ SAVE_REGISTER(r31)
+ SAVE_SPECIAL(MSR)
+ SAVE_SPECIAL(SDR1)
+ SAVE_SPECIAL(XER)
+
+ /* we push the stack up 128 bytes but don't store the
+ * stack pointer on the stack like a real stackframe */
+ addi r1,r1,-128
+
+ bl _iommu_save
+ bl swsusp_save
+
+ /* restore LR */
+ ld r11,[EMAIL PROTECTED](r2)
+ RESTORE_SPECIAL(LR)
+ addi r1,r1,128
+
+ blr
+
+/* Resume code */
+_GLOBAL(swsusp_arch_resume)
+ /* Stop pending alitvec streams and memory accesses */
+BEGIN_FTR_SECTION
+ DSSALL
+END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
+ sync
+
+ ld r12,[EMAIL PROTECTED](r2)
+ ld r12,0(r12)
+
+ cmpdi r12,0
+ beq- nothing_to_copy
+ li r15,512
+copyloop:
+ ld r13,pbe_address(r12)
+ ld r14,pbe_orig_address(r12)
+
+ mtctr r15
+ li r10,0
+copy_page_loop:
+ ldx r0,r10,r13
+ stdx r0,r10,r14
+ addi r10,r10,8
+ bdnz copy_page_loop
+
+ ld r12,pbe_next(r12)
+ cmpdi r12,0
+ bne+ copyloop
+nothing_to_copy:
+
+ /* flush caches */
+ lis r3, 0x10
+ mtctr r3
+ li r3, 0
+ ori r3, r3, CONFIG_KERNEL_START>>48
+ li r0, 48
+ sld r3, r3, r0
+ li r0, 0
+1:
+ dcbf r0,r3
+ addi r3,r3,0x20
+ bdnz 1b
+
+ sync
+
+ tlbia
+
+ ld r11,[EMAIL PROTECTED](r2)
+
+ RESTORE_SPECIAL(CR)
+
+ /* restore timebase */
+ /* load saved tb */
+ ld r1, SL_TB(r11)
+ /* get upper 32 bits of it */
+ srdi r2, r1, 32
+ /* clear tb lower to avoid wrap */
+ li r0, 0
+ mttbl r0
+ /* set tb upper */
+ mttbu r2
+ /* set tb lower */
+ mttbl r1
+
+ /* restore registers */
+ RESTORE_REGISTER(r1)
+ RESTORE_REGISTER(r2)
+ RESTORE_REGISTER(r12)
+ RESTORE_REGISTER(r13)
+ RESTORE_REGISTER(r14)
+ RESTORE_REGISTER(r15)
+ RESTORE_REGISTER(r16)
+ RESTORE_REGISTER(r17)
+ RESTORE_REGISTER(r18)
+ RESTORE_REGISTER(r19)
+ RESTORE_REGISTER(r20)
+ RESTORE_REGISTER(r21)
+ RESTORE_REGISTER(r22)
+ RESTORE_REGISTER(r23)
+ RESTORE_REGISTER(r24)
+ RESTORE_REGISTER(r25)
+ RESTORE_REGISTER(r26)
+ RESTORE_REGISTER(r27)
+ RESTORE_REGISTER(r28)
+ RESTORE_REGISTER(r29)
+ RESTORE_REGISTER(r30)
+ RESTORE_REGISTER(r31)
+ /* can't use RESTORE_SPECIAL(MSR) */
+ ld r0, SL_MSR(r11)
+ mtmsrd r0, 0
+ RESTORE_SPECIAL(SDR1)
+ RESTORE_SPECIAL(XER)
+
+ sync
+
+ addi r1,r1,-128
+ bl slb_flush_and_rebolt
+ bl do_after_copyback
+ addi r1,r1,128
+
+ ld r11,[EMAIL PROTECTED](r2)
+ RESTORE_SPECIAL(LR)
+
+ li r3, 0
+ blr
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index bf99bd4..a34835a 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -1,7 +1,7 @@
#ifndef _LINUX_SWSUSP_H
#define _LINUX_SWSUSP_H
-#if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32)
+#if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32) ||
defined(CONFIG_PPC64)
#include <asm/suspend.h>
#endif
#include <linux/swap.h>
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 51a4dd0..5001c65 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -79,7 +79,7 @@ config PM_SYSFS_DEPRECATED
config SOFTWARE_SUSPEND
bool "Software Suspend"
- depends on PM && SWAP && ((X86 && (!SMP || SUSPEND_SMP)) || ((FRV ||
PPC32) && !SMP))
+ depends on PM && SWAP && (((X86 || PPC64_SWSUSP) && (!SMP ||
SUSPEND_SMP)) || ((FRV || PPC32) && !SMP))
---help---
Enable the suspend to disk (STD) functionality.
@@ -134,7 +134,7 @@ config PM_STD_PARTITION
config SUSPEND_SMP
bool
- depends on HOTPLUG_CPU && X86 && PM
+ depends on HOTPLUG_CPU && (X86 || PPC64) && PM
default y
config APM_EMULATION
-
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