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From: Sebastian Andrzej Siewior <linuxppc-dev@ml.breakpoint.cc>
To: Kumar Gala <galak@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: [PATCH 4/5] powerpc/fsl head: move the entry setup code into a seperate file
Date: Fri, 15 Jan 2010 17:41:36 +0100	[thread overview]
Message-ID: <1263573697-17839-5-git-send-email-linuxppc-dev@ml.breakpoint.cc> (raw)
In-Reply-To: <1263573697-17839-1-git-send-email-linuxppc-dev@ml.breakpoint.cc>

From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

This patch moves only the initial entry code which setups the mapping
from what ever to KERNELBASE into a seperate file. No code change has
been made here.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 arch/powerpc/kernel/fsl_booke_entry_mapping.S |  189 +++++++++++++++++++++++++
 arch/powerpc/kernel/head_fsl_booke.S          |  189 +------------------------
 2 files changed, 190 insertions(+), 188 deletions(-)
 create mode 100644 arch/powerpc/kernel/fsl_booke_entry_mapping.S

diff --git a/arch/powerpc/kernel/fsl_booke_entry_mapping.S b/arch/powerpc/kernel/fsl_booke_entry_mapping.S
new file mode 100644
index 0000000..d629618
--- /dev/null
+++ b/arch/powerpc/kernel/fsl_booke_entry_mapping.S
@@ -0,0 +1,189 @@
+/* 1. Find the index of the entry we're executing in */
+	bl	invstr				/* Find our address */
+invstr:	mflr	r6				/* Make it accessible */
+	mfmsr	r7
+	rlwinm	r4,r7,27,31,31			/* extract MSR[IS] */
+	mfspr	r7, SPRN_PID0
+	slwi	r7,r7,16
+	or	r7,r7,r4
+	mtspr	SPRN_MAS6,r7
+	tlbsx	0,r6				/* search MSR[IS], SPID=PID0 */
+	mfspr	r7,SPRN_MAS1
+	andis.	r7,r7,MAS1_VALID@h
+	bne	match_TLB
+
+	mfspr	r7,SPRN_MMUCFG
+	rlwinm	r7,r7,21,28,31			/* extract MMUCFG[NPIDS] */
+	cmpwi	r7,3
+	bne	match_TLB			/* skip if NPIDS != 3 */
+
+	mfspr	r7,SPRN_PID1
+	slwi	r7,r7,16
+	or	r7,r7,r4
+	mtspr	SPRN_MAS6,r7
+	tlbsx	0,r6				/* search MSR[IS], SPID=PID1 */
+	mfspr	r7,SPRN_MAS1
+	andis.	r7,r7,MAS1_VALID@h
+	bne	match_TLB
+	mfspr	r7, SPRN_PID2
+	slwi	r7,r7,16
+	or	r7,r7,r4
+	mtspr	SPRN_MAS6,r7
+	tlbsx	0,r6				/* Fall through, we had to match */
+
+match_TLB:
+	mfspr	r7,SPRN_MAS0
+	rlwinm	r3,r7,16,20,31			/* Extract MAS0(Entry) */
+
+	mfspr	r7,SPRN_MAS1			/* Insure IPROT set */
+	oris	r7,r7,MAS1_IPROT@h
+	mtspr	SPRN_MAS1,r7
+	tlbwe
+
+/* 2. Invalidate all entries except the entry we're executing in */
+	mfspr	r9,SPRN_TLB1CFG
+	andi.	r9,r9,0xfff
+	li	r6,0				/* Set Entry counter to 0 */
+1:	lis	r7,0x1000			/* Set MAS0(TLBSEL) = 1 */
+	rlwimi	r7,r6,16,4,15			/* Setup MAS0 = TLBSEL | ESEL(r6) */
+	mtspr	SPRN_MAS0,r7
+	tlbre
+	mfspr	r7,SPRN_MAS1
+	rlwinm	r7,r7,0,2,31			/* Clear MAS1 Valid and IPROT */
+	cmpw	r3,r6
+	beq	skpinv				/* Dont update the current execution TLB */
+	mtspr	SPRN_MAS1,r7
+	tlbwe
+	isync
+skpinv:	addi	r6,r6,1				/* Increment */
+	cmpw	r6,r9				/* Are we done? */
+	bne	1b				/* If not, repeat */
+
+	/* Invalidate TLB0 */
+	li	r6,0x04
+	tlbivax 0,r6
+	TLBSYNC
+	/* Invalidate TLB1 */
+	li	r6,0x0c
+	tlbivax 0,r6
+	TLBSYNC
+
+/* 3. Setup a temp mapping and jump to it */
+	lis	r7,0x1000	/* Set MAS0(TLBSEL) = 1 */
+	rlwimi	r7,r3,16,4,15	/* Setup MAS0 = TLBSEL | ESEL(r3) */
+	mtspr	SPRN_MAS0,r7
+	tlbre
+
+	/* grab and fixup the RPN */
+	mfspr	r6,SPRN_MAS1	/* extract MAS1[SIZE] */
+	rlwinm	r6,r6,25,27,31
+	li	r8,-1
+	addi	r6,r6,10
+	slw	r6,r8,r6	/* convert to mask */
+
+	bl	1f		/* Find our address */
+1:	mflr	r7
+
+	mfspr	r8,SPRN_MAS3
+#ifdef CONFIG_PHYS_64BIT
+	mfspr	r23,SPRN_MAS7
+#endif
+	and	r8,r6,r8
+	subfic	r9,r6,-4096
+	and	r9,r9,r7
+
+	or	r25,r8,r9
+	ori	r8,r25,(MAS3_SX|MAS3_SW|MAS3_SR)
+
+	/* Just modify the entry ID and EPN for the temp mapping */
+	li	r7, 0		/* Set MAS0(TLBSEL) = 0 | ESEL(0) */
+	mtspr	SPRN_MAS0,r7
+	xori	r6,r4,1		/* Setup TMP mapping in the other Address space */
+	slwi	r6,r6,12
+	oris	r6,r6,(MAS1_VALID)@h
+	ori	r6,r6,(MAS1_TSIZE(BOOK3E_PAGESZ_4K))@l
+	mtspr	SPRN_MAS1,r6
+	mfspr	r6,SPRN_MAS2
+	li	r7,0		/* temp EPN = 0 */
+	rlwimi	r7,r6,0,20,31
+	mtspr	SPRN_MAS2,r7
+	mtspr	SPRN_MAS3,r8
+	tlbwe
+
+	xori	r6,r4,1
+	slwi	r6,r6,5		/* setup new context with other address space */
+	bl	1f		/* Find our address */
+1:	mflr	r9
+	rlwimi	r7,r9,0,20,31
+	addi	r7,r7,(2f - 1b)
+	mtspr	SPRN_SRR0,r7
+	mtspr	SPRN_SRR1,r6
+	rfi
+2:
+/* 4. Clear out PIDs & Search info */
+	li	r6,0
+	mtspr   SPRN_MAS6,r6
+	mtspr	SPRN_PID0,r6
+
+	mfspr	r7,SPRN_MMUCFG
+	rlwinm	r7,r7,21,28,31			/* extract MMUCFG[NPIDS] */
+	cmpwi	r7,3
+	bne	2f				/* skip if NPIDS != 3 */
+
+	mtspr	SPRN_PID1,r6
+	mtspr	SPRN_PID2,r6
+
+/* 5. Invalidate mapping we started in */
+2:
+	lis	r7,0x1000	/* Set MAS0(TLBSEL) = 1 */
+	rlwimi	r7,r3,16,4,15	/* Setup MAS0 = TLBSEL | ESEL(r3) */
+	mtspr	SPRN_MAS0,r7
+	tlbre
+	mfspr	r6,SPRN_MAS1
+	rlwinm	r6,r6,0,2,0	/* clear IPROT */
+	mtspr	SPRN_MAS1,r6
+	tlbwe
+	/* Invalidate TLB1 */
+	li	r9,0x0c
+	tlbivax 0,r9
+	TLBSYNC
+
+/* The mapping only needs to be cache-coherent on SMP */
+#ifdef CONFIG_SMP
+#define M_IF_SMP	MAS2_M
+#else
+#define M_IF_SMP	0
+#endif
+
+/* 6. Setup KERNELBASE mapping in TLB1[0] */
+	lis	r6,0x1000		/* Set MAS0(TLBSEL) = TLB1(1), ESEL = 0 */
+	mtspr	SPRN_MAS0,r6
+	lis	r6,(MAS1_VALID|MAS1_IPROT)@h
+	ori	r6,r6,(MAS1_TSIZE(BOOK3E_PAGESZ_64M))@l
+	mtspr	SPRN_MAS1,r6
+	lis	r6,MAS2_VAL(PAGE_OFFSET, BOOK3E_PAGESZ_64M, M_IF_SMP)@h
+	ori	r6,r6,MAS2_VAL(PAGE_OFFSET, BOOK3E_PAGESZ_64M, M_IF_SMP)@l
+	mtspr	SPRN_MAS2,r6
+	mtspr	SPRN_MAS3,r8
+	tlbwe
+
+/* 7. Jump to KERNELBASE mapping */
+	lis	r6,(KERNELBASE & ~0xfff)@h
+	ori	r6,r6,(KERNELBASE & ~0xfff)@l
+	lis	r7,MSR_KERNEL@h
+	ori	r7,r7,MSR_KERNEL@l
+	bl	1f			/* Find our address */
+1:	mflr	r9
+	rlwimi	r6,r9,0,20,31
+	addi	r6,r6,(2f - 1b)
+	add	r6, r6, r25
+	mtspr	SPRN_SRR0,r6
+	mtspr	SPRN_SRR1,r7
+	rfi				/* start execution out of TLB1[0] entry */
+
+/* 8. Clear out the temp mapping */
+2:
+	/* Invalidate TLB0 */
+	li	r9,0x04
+	tlbivax 0,r9
+	TLBSYNC
diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index 445eddd..4de9bc5 100644
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -94,195 +94,8 @@ _ENTRY(_start);
  */
 
 _ENTRY(__early_start)
-/* 1. Find the index of the entry we're executing in */
-	bl	invstr				/* Find our address */
-invstr:	mflr	r6				/* Make it accessible */
-	mfmsr	r7
-	rlwinm	r4,r7,27,31,31			/* extract MSR[IS] */
-	mfspr	r7, SPRN_PID0
-	slwi	r7,r7,16
-	or	r7,r7,r4
-	mtspr	SPRN_MAS6,r7
-	tlbsx	0,r6				/* search MSR[IS], SPID=PID0 */
-	mfspr	r7,SPRN_MAS1
-	andis.	r7,r7,MAS1_VALID@h
-	bne	match_TLB
-
-	mfspr	r7,SPRN_MMUCFG
-	rlwinm	r7,r7,21,28,31			/* extract MMUCFG[NPIDS] */
-	cmpwi	r7,3
-	bne	match_TLB			/* skip if NPIDS != 3 */
-
-	mfspr	r7,SPRN_PID1
-	slwi	r7,r7,16
-	or	r7,r7,r4
-	mtspr	SPRN_MAS6,r7
-	tlbsx	0,r6				/* search MSR[IS], SPID=PID1 */
-	mfspr	r7,SPRN_MAS1
-	andis.	r7,r7,MAS1_VALID@h
-	bne	match_TLB
-	mfspr	r7, SPRN_PID2
-	slwi	r7,r7,16
-	or	r7,r7,r4
-	mtspr	SPRN_MAS6,r7
-	tlbsx	0,r6				/* Fall through, we had to match */
-
-match_TLB:
-	mfspr	r7,SPRN_MAS0
-	rlwinm	r3,r7,16,20,31			/* Extract MAS0(Entry) */
-
-	mfspr	r7,SPRN_MAS1			/* Insure IPROT set */
-	oris	r7,r7,MAS1_IPROT@h
-	mtspr	SPRN_MAS1,r7
-	tlbwe
-
-/* 2. Invalidate all entries except the entry we're executing in */
-	mfspr	r9,SPRN_TLB1CFG
-	andi.	r9,r9,0xfff
-	li	r6,0				/* Set Entry counter to 0 */
-1:	lis	r7,0x1000			/* Set MAS0(TLBSEL) = 1 */
-	rlwimi	r7,r6,16,4,15			/* Setup MAS0 = TLBSEL | ESEL(r6) */
-	mtspr	SPRN_MAS0,r7
-	tlbre
-	mfspr	r7,SPRN_MAS1
-	rlwinm	r7,r7,0,2,31			/* Clear MAS1 Valid and IPROT */
-	cmpw	r3,r6
-	beq	skpinv				/* Dont update the current execution TLB */
-	mtspr	SPRN_MAS1,r7
-	tlbwe
-	isync
-skpinv:	addi	r6,r6,1				/* Increment */
-	cmpw	r6,r9				/* Are we done? */
-	bne	1b				/* If not, repeat */
-
-	/* Invalidate TLB0 */
-	li	r6,0x04
-	tlbivax 0,r6
-	TLBSYNC
-	/* Invalidate TLB1 */
-	li	r6,0x0c
-	tlbivax 0,r6
-	TLBSYNC
-
-/* 3. Setup a temp mapping and jump to it */
-	lis	r7,0x1000	/* Set MAS0(TLBSEL) = 1 */
-	rlwimi	r7,r3,16,4,15	/* Setup MAS0 = TLBSEL | ESEL(r3) */
-	mtspr	SPRN_MAS0,r7
-	tlbre
-
-	/* grab and fixup the RPN */
-	mfspr	r6,SPRN_MAS1	/* extract MAS1[SIZE] */
-	rlwinm	r6,r6,25,27,31
-	li	r8,-1
-	addi	r6,r6,10
-	slw	r6,r8,r6	/* convert to mask */
-
-	bl	1f		/* Find our address */
-1:	mflr	r7
-
-	mfspr	r8,SPRN_MAS3
-#ifdef CONFIG_PHYS_64BIT
-	mfspr	r23,SPRN_MAS7
-#endif
-	and	r8,r6,r8
-	subfic	r9,r6,-4096
-	and	r9,r9,r7
-
-	or	r25,r8,r9
-	ori	r8,r25,(MAS3_SX|MAS3_SW|MAS3_SR)
-
-	/* Just modify the entry ID and EPN for the temp mapping */
-	li	r7, 0		/* Set MAS0(TLBSEL) = 0 | ESEL(0) */
-	mtspr	SPRN_MAS0,r7
-	xori	r6,r4,1		/* Setup TMP mapping in the other Address space */
-	slwi	r6,r6,12
-	oris	r6,r6,(MAS1_VALID)@h
-	ori	r6,r6,(MAS1_TSIZE(BOOK3E_PAGESZ_4K))@l
-	mtspr	SPRN_MAS1,r6
-	mfspr	r6,SPRN_MAS2
-	li	r7,0		/* temp EPN = 0 */
-	rlwimi	r7,r6,0,20,31
-	mtspr	SPRN_MAS2,r7
-	mtspr	SPRN_MAS3,r8
-	tlbwe
-
-	xori	r6,r4,1
-	slwi	r6,r6,5		/* setup new context with other address space */
-	bl	1f		/* Find our address */
-1:	mflr	r9
-	rlwimi	r7,r9,0,20,31
-	addi	r7,r7,(2f - 1b)
-	mtspr	SPRN_SRR0,r7
-	mtspr	SPRN_SRR1,r6
-	rfi
-2:
-/* 4. Clear out PIDs & Search info */
-	li	r6,0
-	mtspr   SPRN_MAS6,r6
-	mtspr	SPRN_PID0,r6
-
-	mfspr	r7,SPRN_MMUCFG
-	rlwinm	r7,r7,21,28,31			/* extract MMUCFG[NPIDS] */
-	cmpwi	r7,3
-	bne	2f				/* skip if NPIDS != 3 */
 
-	mtspr	SPRN_PID1,r6
-	mtspr	SPRN_PID2,r6
-
-/* 5. Invalidate mapping we started in */
-2:
-	lis	r7,0x1000	/* Set MAS0(TLBSEL) = 1 */
-	rlwimi	r7,r3,16,4,15	/* Setup MAS0 = TLBSEL | ESEL(r3) */
-	mtspr	SPRN_MAS0,r7
-	tlbre
-	mfspr	r6,SPRN_MAS1
-	rlwinm	r6,r6,0,2,0	/* clear IPROT */
-	mtspr	SPRN_MAS1,r6
-	tlbwe
-	/* Invalidate TLB1 */
-	li	r9,0x0c
-	tlbivax 0,r9
-	TLBSYNC
-
-/* The mapping only needs to be cache-coherent on SMP */
-#ifdef CONFIG_SMP
-#define M_IF_SMP	MAS2_M
-#else
-#define M_IF_SMP	0
-#endif
-
-/* 6. Setup KERNELBASE mapping in TLB1[0] */
-	lis	r6,0x1000		/* Set MAS0(TLBSEL) = TLB1(1), ESEL = 0 */
-	mtspr	SPRN_MAS0,r6
-	lis	r6,(MAS1_VALID|MAS1_IPROT)@h
-	ori	r6,r6,(MAS1_TSIZE(BOOK3E_PAGESZ_64M))@l
-	mtspr	SPRN_MAS1,r6
-	lis	r6,MAS2_VAL(PAGE_OFFSET, BOOK3E_PAGESZ_64M, M_IF_SMP)@h
-	ori	r6,r6,MAS2_VAL(PAGE_OFFSET, BOOK3E_PAGESZ_64M, M_IF_SMP)@l
-	mtspr	SPRN_MAS2,r6
-	mtspr	SPRN_MAS3,r8
-	tlbwe
-
-/* 7. Jump to KERNELBASE mapping */
-	lis	r6,(KERNELBASE & ~0xfff)@h
-	ori	r6,r6,(KERNELBASE & ~0xfff)@l
-	lis	r7,MSR_KERNEL@h
-	ori	r7,r7,MSR_KERNEL@l
-	bl	1f			/* Find our address */
-1:	mflr	r9
-	rlwimi	r6,r9,0,20,31
-	addi	r6,r6,(2f - 1b)
-	add	r6, r6, r25
-	mtspr	SPRN_SRR0,r6
-	mtspr	SPRN_SRR1,r7
-	rfi				/* start execution out of TLB1[0] entry */
-
-/* 8. Clear out the temp mapping */
-2:
-	/* Invalidate TLB0 */
-	li	r9,0x04
-	tlbivax 0,r9
-	TLBSYNC
+#include "fsl_booke_entry_mapping.S"
 
 	/* Establish the interrupt vector offsets */
 	SET_IVOR(0,  CriticalInput);
-- 
1.6.2.5

  parent reply	other threads:[~2010-01-15 17:11 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-01-15 16:41 Kexec support for FSL-BookE, take two Sebastian Andrzej Siewior
2010-01-15 16:41 ` [PATCH 1/5] powerpc/head fsl: fix the case where we are not in the first page Sebastian Andrzej Siewior
2010-02-18  3:07   ` Kumar Gala
2010-02-18  8:53     ` Sebastian Andrzej Siewior
2010-01-15 16:41 ` [PATCH 2/5] powerpc/head fsl: move the temp 4KiB mapping to TLB0 Sebastian Andrzej Siewior
2010-02-18  3:09   ` Kumar Gala
2010-02-18  9:08     ` Sebastian Andrzej Siewior
2010-01-15 16:41 ` [PATCH 3/5] powerpc/head fsl: replace a hardcoded constant Sebastian Andrzej Siewior
2010-02-18  3:11   ` Kumar Gala
2010-01-15 16:41 ` Sebastian Andrzej Siewior [this message]
2010-01-15 16:41 ` [PATCH 5/5] powerpc/kexec: Add support for FSL-BookE Sebastian Andrzej Siewior
2010-01-15 17:53 ` Kexec support for FSL-BookE, take two Kumar Gala
2010-01-15 19:23   ` Sebastian Andrzej Siewior
2010-02-08 14:09   ` Sebastian Andrzej Siewior
2010-01-16 12:35 ` wilbur.chan
2010-01-16 12:52   ` Sebastian Andrzej Siewior

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