patch-2.4.19 linux-2.4.19/arch/mips64/kernel/r4k_tlb.S

• Lines: 127
• Date: Wed Dec 31 16:00:00 1969
• Orig file: linux-2.4.18/arch/mips64/kernel/r4k_tlb.S
• Orig date: Wed Jul 4 11:50:39 2001

diff -urN linux-2.4.18/arch/mips64/kernel/r4k_tlb.S linux-2.4.19/arch/mips64/kernel/r4k_tlb.S
@@ -1,126 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2000 Silicon Graphics, Inc.
- * Written by Ulf Carlsson (ulfc@engr.sgi.com)
- */
-#include <linux/config.h>
-#include <linux/threads.h>
-#include <asm/asm.h>
-#include <asm/regdef.h>
-#include <asm/mipsregs.h>
-#include <asm/pgtable.h>
-#include <asm/stackframe.h>
-
-	.data
-	.comm	pgd_current, NR_CPUS * 8, 8
-
-	/*
-	 * After this macro runs we have a pointer to the pte of the address
-	 * that caused the fault in in PTR.
-	 */
-
-	.macro	LOAD_PTE2, ptr, tmp
-#ifdef CONFIG_SMP
-	dmfc0	\tmp, CP0_CONTEXT
-	dla	\ptr, pgd_current
-	dsrl	\tmp, 23
-	daddu	\ptr, \tmp
-#else
-	dla	\ptr, pgd_current
-#endif
-	dmfc0	\tmp, CP0_BADVADDR
-	ld	\ptr, (\ptr)
-	bltz	\tmp, kaddr
-	 dsrl	\tmp, (PGDIR_SHIFT-3)		# get pgd offset in bytes
-	andi	\tmp, ((PTRS_PER_PGD - 1)<<3)
-	daddu	\ptr, \tmp			# add in pgd offset
-	dmfc0	\tmp, CP0_BADVADDR
-	ld	\ptr, (\ptr)			# get pmd pointer
-	dsrl	\tmp, (PMD_SHIFT-3)		# get pmd offset in bytes
-	andi	\tmp, ((PTRS_PER_PMD - 1)<<3)
-	daddu	\ptr, \tmp			# add in pmd offset
-	dmfc0	\tmp, CP0_XCONTEXT
-	ld	\ptr, (\ptr)			# get pte pointer
-	andi	\tmp, 0xff0			# get pte offset
-	daddu	\ptr, \tmp
-	.endm
-
-	/*
-	 * This places the even/odd pte pair in the page table at the pte
-	 * entry pointed to by PTE into ENTRYLO0 and ENTRYLO1.
-	 */
-	.macro	PTE_RELOAD, pte0, pte1
-	dsrl	\pte0, 6			# convert to entrylo0
-	dmtc0	\pte0, CP0_ENTRYLO0		# load it
-	dsrl	\pte1, 6			# convert to entrylo1
-	dmtc0	\pte1, CP0_ENTRYLO1		# load it
-	.endm
-
-	.text
-	.set	noreorder
-	.set	mips3
-
-	.align	5
-FEXPORT(except_vec0)
-	.set	noat
-1:	b	1b
-	 nop
-
-	/* TLB refill handler for the R10000.
-	 * Attention:  We may only use 32 instructions.
-	 */
-
-	.align	5
-FEXPORT(except_vec1_r10k)
-	.set	noat
-	LOAD_PTE2 k1 k0
-	ld	k0, 0(k1)			# get even pte
-	ld	k1, 8(k1)			# get odd pte
-	PTE_RELOAD k0 k1
-	nop
-	tlbwr
-	eret
-kaddr:
-	dla	k0, handle_vmalloc_address	# MAPPED kernel needs this
-	jr	k0
-	 nop
-
-	.align	5
-FEXPORT(handle_vmalloc_address)
-	.set	noat
-	/*
-	 * First, determine that the address is in/above vmalloc range.
-	 */
-	dmfc0	k0, CP0_BADVADDR
-	dli	k1, VMALLOC_START
-
-	/*
-	 * Now find offset into kptbl.
-	 */
-	dsubu	k0, k0, k1
-	dla	k1, kptbl
-	dsrl	k0, (PAGE_SHIFT+1)		# get vpn2
-	dsll	k0, 4				# byte offset of pte
-	daddu	k1, k1, k0
-
-	/*
-	 * Determine that fault address is within vmalloc range.
-	 */
-	dla	k0, ekptbl
-	sltu	k0, k1, k0
-	beqz	k0, not_vmalloc
-
-	/*
-	 * Load cp0 registers.
-	 */
-	ld	k0, 0(k1)			# get even pte
-	ld	k1, 8(k1)			# get odd pte
-
-not_vmalloc:
-	PTE_RELOAD k0 k1
-	nop
-	tlbwr
-	eret