powerpc/mm: Split low level tlb invalidate for nohash processors

Currently, the various forms of low level TLB invalidations are all
implemented in misc_32.S for 32-bit processors, in a fairly scary
mess of #ifdef's and with interesting duplication such as a whole
bunch of code for FSL _tlbie and _tlbia which are no longer used.

This moves things around such that _tlbie is now defined in
hash_low_32.S and is only used by the 32-bit hash code, and all
nohash CPUs use the various _tlbil_* forms that are now moved to
a new file, tlb_nohash_low.S.

I moved all the definitions for that stuff out of
include/asm/tlbflush.h as they are really internal mm stuff, into
mm/mmu_decl.h

The code should have no functional changes.  I kept some variants
inline for trivial forms on things like 40x and 8xx.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 0 insertions, 233 deletions

diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 2c2ab89f0b6..ae0d084b6a2 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -272,239 +272,6 @@ _GLOBAL(real_writeb)
 
 #endif /* CONFIG_40x */
 
-/*
- * Flush MMU TLB
- */
-#ifndef CONFIG_FSL_BOOKE
-_GLOBAL(_tlbil_all)
-_GLOBAL(_tlbil_pid)
-#endif
-_GLOBAL(_tlbia)
-#if defined(CONFIG_40x)
-	sync			/* Flush to memory before changing mapping */
-	tlbia
-	isync			/* Flush shadow TLB */
-#elif defined(CONFIG_44x)
-	li	r3,0
-	sync
-
-	/* Load high watermark */
-	lis	r4,tlb_44x_hwater@ha
-	lwz	r5,tlb_44x_hwater@l(r4)
-
-1:	tlbwe	r3,r3,PPC44x_TLB_PAGEID
-	addi	r3,r3,1
-	cmpw	0,r3,r5
-	ble	1b
-
-	isync
-#elif defined(CONFIG_FSL_BOOKE)
-	/* Invalidate all entries in TLB0 */
-	li	r3, 0x04
-	tlbivax	0,3
-	/* Invalidate all entries in TLB1 */
-	li	r3, 0x0c
-	tlbivax	0,3
-	msync
-#ifdef CONFIG_SMP
-	tlbsync
-#endif /* CONFIG_SMP */
-#else /* !(CONFIG_40x || CONFIG_44x || CONFIG_FSL_BOOKE) */
-#if defined(CONFIG_SMP)
-	rlwinm	r8,r1,0,0,(31-THREAD_SHIFT)
-	lwz	r8,TI_CPU(r8)
-	oris	r8,r8,10
-	mfmsr	r10
-	SYNC
-	rlwinm	r0,r10,0,17,15		/* clear bit 16 (MSR_EE) */
-	rlwinm	r0,r0,0,28,26		/* clear DR */
-	mtmsr	r0
-	SYNC_601
-	isync
-	lis	r9,mmu_hash_lock@h
-	ori	r9,r9,mmu_hash_lock@l
-	tophys(r9,r9)
-10:	lwarx	r7,0,r9
-	cmpwi	0,r7,0
-	bne-	10b
-	stwcx.	r8,0,r9
-	bne-	10b
-	sync
-	tlbia
-	sync
-	TLBSYNC
-	li	r0,0
-	stw	r0,0(r9)		/* clear mmu_hash_lock */
-	mtmsr	r10
-	SYNC_601
-	isync
-#else /* CONFIG_SMP */
-	sync
-	tlbia
-	sync
-#endif /* CONFIG_SMP */
-#endif /* ! defined(CONFIG_40x) */
-	blr
-
-/*
- * Flush MMU TLB for a particular address
- */
-#ifndef CONFIG_FSL_BOOKE
-_GLOBAL(_tlbil_va)
-#endif
-_GLOBAL(_tlbie)
-#if defined(CONFIG_40x)
-	/* We run the search with interrupts disabled because we have to change
-	 * the PID and I don't want to preempt when that happens.
-	 */
-	mfmsr	r5
-	mfspr	r6,SPRN_PID
-	wrteei	0
-	mtspr	SPRN_PID,r4
-	tlbsx.	r3, 0, r3
-	mtspr	SPRN_PID,r6
-	wrtee	r5
-	bne	10f
-	sync
-	/* There are only 64 TLB entries, so r3 < 64, which means bit 25 is clear.
-	 * Since 25 is the V bit in the TLB_TAG, loading this value will invalidate
-	 * the TLB entry. */
-	tlbwe	r3, r3, TLB_TAG
-	isync
-10:
-
-#elif defined(CONFIG_44x)
-	mfspr	r5,SPRN_MMUCR
-	rlwimi	r5,r4,0,24,31			/* Set TID */
-
-	/* We have to run the search with interrupts disabled, even critical
-	 * and debug interrupts (in fact the only critical exceptions we have
-	 * are debug and machine check).  Otherwise  an interrupt which causes
-	 * a TLB miss can clobber the MMUCR between the mtspr and the tlbsx. */
-	mfmsr	r4
-	lis	r6,(MSR_EE|MSR_CE|MSR_ME|MSR_DE)@ha
-	addi	r6,r6,(MSR_EE|MSR_CE|MSR_ME|MSR_DE)@l
-	andc	r6,r4,r6
-	mtmsr	r6
-	mtspr	SPRN_MMUCR,r5
-	tlbsx.	r3, 0, r3
-	mtmsr	r4
-	bne	10f
-	sync
-	/* There are only 64 TLB entries, so r3 < 64,
-	 * which means bit 22, is clear.  Since 22 is
-	 * the V bit in the TLB_PAGEID, loading this
-	 * value will invalidate the TLB entry.
-	 */
-	tlbwe	r3, r3, PPC44x_TLB_PAGEID
-	isync
-10:
-#elif defined(CONFIG_FSL_BOOKE)
-	rlwinm	r4, r3, 0, 0, 19
-	ori	r5, r4, 0x08	/* TLBSEL = 1 */
-	tlbivax	0, r4
-	tlbivax	0, r5
-	msync
-#if defined(CONFIG_SMP)
-	tlbsync
-#endif /* CONFIG_SMP */
-#else /* !(CONFIG_40x || CONFIG_44x || CONFIG_FSL_BOOKE) */
-#if defined(CONFIG_SMP)
-	rlwinm	r8,r1,0,0,(31-THREAD_SHIFT)
-	lwz	r8,TI_CPU(r8)
-	oris	r8,r8,11
-	mfmsr	r10
-	SYNC
-	rlwinm	r0,r10,0,17,15		/* clear bit 16 (MSR_EE) */
-	rlwinm	r0,r0,0,28,26		/* clear DR */
-	mtmsr	r0
-	SYNC_601
-	isync
-	lis	r9,mmu_hash_lock@h
-	ori	r9,r9,mmu_hash_lock@l
-	tophys(r9,r9)
-10:	lwarx	r7,0,r9
-	cmpwi	0,r7,0
-	bne-	10b
-	stwcx.	r8,0,r9
-	bne-	10b
-	eieio
-	tlbie	r3
-	sync
-	TLBSYNC
-	li	r0,0
-	stw	r0,0(r9)		/* clear mmu_hash_lock */
-	mtmsr	r10
-	SYNC_601
-	isync
-#else /* CONFIG_SMP */
-	tlbie	r3
-	sync
-#endif /* CONFIG_SMP */
-#endif /* ! CONFIG_40x */
-	blr
-
-#if defined(CONFIG_FSL_BOOKE)
-/*
- * Flush MMU TLB, but only on the local processor (no broadcast)
- */
-_GLOBAL(_tlbil_all)
-#define MMUCSR0_TLBFI	(MMUCSR0_TLB0FI | MMUCSR0_TLB1FI | \
-			 MMUCSR0_TLB2FI | MMUCSR0_TLB3FI)
-	li	r3,(MMUCSR0_TLBFI)@l
-	mtspr	SPRN_MMUCSR0, r3
-1:
-	mfspr	r3,SPRN_MMUCSR0
-	andi.	r3,r3,MMUCSR0_TLBFI@l
-	bne	1b
-	blr
-
-/*
- * Flush MMU TLB for a particular process id, but only on the local processor
- * (no broadcast)
- */
-_GLOBAL(_tlbil_pid)
-/* we currently do an invalidate all since we don't have per pid invalidate */
-	li	r3,(MMUCSR0_TLBFI)@l
-	mtspr	SPRN_MMUCSR0, r3
-1:
-	mfspr	r3,SPRN_MMUCSR0
-	andi.	r3,r3,MMUCSR0_TLBFI@l
-	bne	1b
-	msync
-	isync
-	blr
-
-/*
- * Flush MMU TLB for a particular address, but only on the local processor
- * (no broadcast)
- */
-_GLOBAL(_tlbil_va)
-	mfmsr	r10
-	wrteei	0
-	slwi	r4,r4,16
-	mtspr	SPRN_MAS6,r4		/* assume AS=0 for now */
-	tlbsx	0,r3
-	mfspr	r4,SPRN_MAS1		/* check valid */
-	andis.	r3,r4,MAS1_VALID@h
-	beq	1f
-	rlwinm	r4,r4,0,1,31
-	mtspr	SPRN_MAS1,r4
-	tlbwe
-	msync
-	isync
-1:	wrtee	r10
-	blr
-#endif /* CONFIG_FSL_BOOKE */
-
-/*
- * Nobody implements this yet
- */
-_GLOBAL(_tlbivax_bcast)
-1:	trap
-	EMIT_BUG_ENTRY 1b,__FILE__,__LINE__,0;
-	blr
-
 
 /*
  * Flush instruction cache.