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authorPaul Mackerras <paulus@samba.org>2006-03-27 19:21:46 +1100
committerPaul Mackerras <paulus@samba.org>2006-03-27 19:21:46 +1100
commit45320bcbabfa9149f43a5beb4b9a4f108dd98929 (patch)
tree9909762878ef1390c2570b6157c521fb6a068433 /arch/ppc/kernel
parent9b781727fd1062671afa144b93e8c69b14bcac4d (diff)
downloadlinux-linaro-stable-45320bcbabfa9149f43a5beb4b9a4f108dd98929.tar.gz
powerpc: Move swsusp.S over to arch/powerpc
... and rename it to swsusp_32.S, since it's 32-bit only at this stage. Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/ppc/kernel')
-rw-r--r--arch/ppc/kernel/Makefile2
-rw-r--r--arch/ppc/kernel/swsusp.S349
2 files changed, 0 insertions, 351 deletions
diff --git a/arch/ppc/kernel/Makefile b/arch/ppc/kernel/Makefile
index d6a4863d4e7c..8ac1dd958415 100644
--- a/arch/ppc/kernel/Makefile
+++ b/arch/ppc/kernel/Makefile
@@ -13,7 +13,6 @@ extra-y += vmlinux.lds
obj-y := entry.o traps.o time.o misc.o \
setup.o \
ppc_htab.o
-obj-$(CONFIG_SOFTWARE_SUSPEND) += swsusp.o
obj-$(CONFIG_MODULES) += module.o ppc_ksyms.o
obj-$(CONFIG_NOT_COHERENT_CACHE) += dma-mapping.o
obj-$(CONFIG_PCI) += pci.o
@@ -32,7 +31,6 @@ endif
# These are here while we do the architecture merge
else
-obj-$(CONFIG_SOFTWARE_SUSPEND) += swsusp.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_NOT_COHERENT_CACHE) += dma-mapping.o
obj-$(CONFIG_KGDB) += ppc-stub.o
diff --git a/arch/ppc/kernel/swsusp.S b/arch/ppc/kernel/swsusp.S
deleted file mode 100644
index 69773cc1a85f..000000000000
--- a/arch/ppc/kernel/swsusp.S
+++ /dev/null
@@ -1,349 +0,0 @@
-#include <linux/config.h>
-#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_SP 0
-#define SL_PC 4
-#define SL_MSR 8
-#define SL_SDR1 0xc
-#define SL_SPRG0 0x10 /* 4 sprg's */
-#define SL_DBAT0 0x20
-#define SL_IBAT0 0x28
-#define SL_DBAT1 0x30
-#define SL_IBAT1 0x38
-#define SL_DBAT2 0x40
-#define SL_IBAT2 0x48
-#define SL_DBAT3 0x50
-#define SL_IBAT3 0x58
-#define SL_TB 0x60
-#define SL_R2 0x68
-#define SL_CR 0x6c
-#define SL_LR 0x70
-#define SL_R12 0x74 /* r12 to r31 */
-#define SL_SIZE (SL_R12 + 80)
-
- .section .data
- .align 5
-
-_GLOBAL(swsusp_save_area)
- .space SL_SIZE
-
-
- .section .text
- .align 5
-
-_GLOBAL(swsusp_arch_suspend)
-
- lis r11,swsusp_save_area@h
- ori r11,r11,swsusp_save_area@l
-
- mflr r0
- stw r0,SL_LR(r11)
- mfcr r0
- stw r0,SL_CR(r11)
- stw r1,SL_SP(r11)
- stw r2,SL_R2(r11)
- stmw r12,SL_R12(r11)
-
- /* Save MSR & SDR1 */
- mfmsr r4
- stw r4,SL_MSR(r11)
- mfsdr1 r4
- stw r4,SL_SDR1(r11)
-
- /* Get a stable timebase and save it */
-1: mftbu r4
- stw r4,SL_TB(r11)
- mftb r5
- stw r5,SL_TB+4(r11)
- mftbu r3
- cmpw r3,r4
- bne 1b
-
- /* Save SPRGs */
- mfsprg r4,0
- stw r4,SL_SPRG0(r11)
- mfsprg r4,1
- stw r4,SL_SPRG0+4(r11)
- mfsprg r4,2
- stw r4,SL_SPRG0+8(r11)
- mfsprg r4,3
- stw r4,SL_SPRG0+12(r11)
-
- /* Save BATs */
- mfdbatu r4,0
- stw r4,SL_DBAT0(r11)
- mfdbatl r4,0
- stw r4,SL_DBAT0+4(r11)
- mfdbatu r4,1
- stw r4,SL_DBAT1(r11)
- mfdbatl r4,1
- stw r4,SL_DBAT1+4(r11)
- mfdbatu r4,2
- stw r4,SL_DBAT2(r11)
- mfdbatl r4,2
- stw r4,SL_DBAT2+4(r11)
- mfdbatu r4,3
- stw r4,SL_DBAT3(r11)
- mfdbatl r4,3
- stw r4,SL_DBAT3+4(r11)
- mfibatu r4,0
- stw r4,SL_IBAT0(r11)
- mfibatl r4,0
- stw r4,SL_IBAT0+4(r11)
- mfibatu r4,1
- stw r4,SL_IBAT1(r11)
- mfibatl r4,1
- stw r4,SL_IBAT1+4(r11)
- mfibatu r4,2
- stw r4,SL_IBAT2(r11)
- mfibatl r4,2
- stw r4,SL_IBAT2+4(r11)
- mfibatu r4,3
- stw r4,SL_IBAT3(r11)
- mfibatl r4,3
- stw r4,SL_IBAT3+4(r11)
-
-#if 0
- /* Backup various CPU config stuffs */
- bl __save_cpu_setup
-#endif
- /* Call the low level suspend stuff (we should probably have made
- * a stackframe...
- */
- bl swsusp_save
-
- /* Restore LR from the save area */
- lis r11,swsusp_save_area@h
- ori r11,r11,swsusp_save_area@l
- lwz r0,SL_LR(r11)
- mtlr r0
-
- 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
-
- /* Disable MSR:DR to make sure we don't take a TLB or
- * hash miss during the copy, as our hash table will
- * for a while be unuseable. For .text, we assume we are
- * covered by a BAT. This works only for non-G5 at this
- * point. G5 will need a better approach, possibly using
- * a small temporary hash table filled with large mappings,
- * disabling the MMU completely isn't a good option for
- * performance reasons.
- * (Note that 750's may have the same performance issue as
- * the G5 in this case, we should investigate using moving
- * BATs for these CPUs)
- */
- mfmsr r0
- sync
- rlwinm r0,r0,0,28,26 /* clear MSR_DR */
- mtmsr r0
- sync
- isync
-
- /* Load ptr the list of pages to copy in r3 */
- lis r11,(pagedir_nosave - KERNELBASE)@h
- ori r11,r11,pagedir_nosave@l
- lwz r10,0(r11)
-
- /* Copy the pages. This is a very basic implementation, to
- * be replaced by something more cache efficient */
-1:
- tophys(r3,r10)
- li r0,256
- mtctr r0
- lwz r11,pbe_address(r3) /* source */
- tophys(r5,r11)
- lwz r10,pbe_orig_address(r3) /* destination */
- tophys(r6,r10)
-2:
- lwz r8,0(r5)
- lwz r9,4(r5)
- lwz r10,8(r5)
- lwz r11,12(r5)
- addi r5,r5,16
- stw r8,0(r6)
- stw r9,4(r6)
- stw r10,8(r6)
- stw r11,12(r6)
- addi r6,r6,16
- bdnz 2b
- lwz r10,pbe_next(r3)
- cmpwi 0,r10,0
- bne 1b
-
- /* Do a very simple cache flush/inval of the L1 to ensure
- * coherency of the icache
- */
- lis r3,0x0002
- mtctr r3
- li r3, 0
-1:
- lwz r0,0(r3)
- addi r3,r3,0x0020
- bdnz 1b
- isync
- sync
-
- /* Now flush those cache lines */
- lis r3,0x0002
- mtctr r3
- li r3, 0
-1:
- dcbf 0,r3
- addi r3,r3,0x0020
- bdnz 1b
- sync
-
- /* Ok, we are now running with the kernel data of the old
- * kernel fully restored. We can get to the save area
- * easily now. As for the rest of the code, it assumes the
- * loader kernel and the booted one are exactly identical
- */
- lis r11,swsusp_save_area@h
- ori r11,r11,swsusp_save_area@l
- tophys(r11,r11)
-
-#if 0
- /* Restore various CPU config stuffs */
- bl __restore_cpu_setup
-#endif
- /* Restore the BATs, and SDR1. Then we can turn on the MMU.
- * This is a bit hairy as we are running out of those BATs,
- * but first, our code is probably in the icache, and we are
- * writing the same value to the BAT, so that should be fine,
- * though a better solution will have to be found long-term
- */
- lwz r4,SL_SDR1(r11)
- mtsdr1 r4
- lwz r4,SL_SPRG0(r11)
- mtsprg 0,r4
- lwz r4,SL_SPRG0+4(r11)
- mtsprg 1,r4
- lwz r4,SL_SPRG0+8(r11)
- mtsprg 2,r4
- lwz r4,SL_SPRG0+12(r11)
- mtsprg 3,r4
-
-#if 0
- lwz r4,SL_DBAT0(r11)
- mtdbatu 0,r4
- lwz r4,SL_DBAT0+4(r11)
- mtdbatl 0,r4
- lwz r4,SL_DBAT1(r11)
- mtdbatu 1,r4
- lwz r4,SL_DBAT1+4(r11)
- mtdbatl 1,r4
- lwz r4,SL_DBAT2(r11)
- mtdbatu 2,r4
- lwz r4,SL_DBAT2+4(r11)
- mtdbatl 2,r4
- lwz r4,SL_DBAT3(r11)
- mtdbatu 3,r4
- lwz r4,SL_DBAT3+4(r11)
- mtdbatl 3,r4
- lwz r4,SL_IBAT0(r11)
- mtibatu 0,r4
- lwz r4,SL_IBAT0+4(r11)
- mtibatl 0,r4
- lwz r4,SL_IBAT1(r11)
- mtibatu 1,r4
- lwz r4,SL_IBAT1+4(r11)
- mtibatl 1,r4
- lwz r4,SL_IBAT2(r11)
- mtibatu 2,r4
- lwz r4,SL_IBAT2+4(r11)
- mtibatl 2,r4
- lwz r4,SL_IBAT3(r11)
- mtibatu 3,r4
- lwz r4,SL_IBAT3+4(r11)
- mtibatl 3,r4
-#endif
-
-BEGIN_FTR_SECTION
- li r4,0
- mtspr SPRN_DBAT4U,r4
- mtspr SPRN_DBAT4L,r4
- mtspr SPRN_DBAT5U,r4
- mtspr SPRN_DBAT5L,r4
- mtspr SPRN_DBAT6U,r4
- mtspr SPRN_DBAT6L,r4
- mtspr SPRN_DBAT7U,r4
- mtspr SPRN_DBAT7L,r4
- mtspr SPRN_IBAT4U,r4
- mtspr SPRN_IBAT4L,r4
- mtspr SPRN_IBAT5U,r4
- mtspr SPRN_IBAT5L,r4
- mtspr SPRN_IBAT6U,r4
- mtspr SPRN_IBAT6L,r4
- mtspr SPRN_IBAT7U,r4
- mtspr SPRN_IBAT7L,r4
-END_FTR_SECTION_IFSET(CPU_FTR_HAS_HIGH_BATS)
-
- /* Flush all TLBs */
- lis r4,0x1000
-1: addic. r4,r4,-0x1000
- tlbie r4
- blt 1b
- sync
-
- /* restore the MSR and turn on the MMU */
- lwz r3,SL_MSR(r11)
- bl turn_on_mmu
- tovirt(r11,r11)
-
- /* Restore TB */
- li r3,0
- mttbl r3
- lwz r3,SL_TB(r11)
- lwz r4,SL_TB+4(r11)
- mttbu r3
- mttbl r4
-
- /* Kick decrementer */
- li r0,1
- mtdec r0
-
- /* Restore the callee-saved registers and return */
- lwz r0,SL_CR(r11)
- mtcr r0
- lwz r2,SL_R2(r11)
- lmw r12,SL_R12(r11)
- lwz r1,SL_SP(r11)
- lwz r0,SL_LR(r11)
- mtlr r0
-
- // XXX Note: we don't really need to call swsusp_resume
-
- li r3,0
- blr
-
-/* FIXME:This construct is actually not useful since we don't shut
- * down the instruction MMU, we could just flip back MSR-DR on.
- */
-turn_on_mmu:
- mflr r4
- mtsrr0 r4
- mtsrr1 r3
- sync
- isync
- rfi
-