+++ /dev/null
-###############################################################################
-#
-# TLB loading functions
-#
-# Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
-# Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
-# Modified by David Howells (dhowells@redhat.com)
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public Licence
-# as published by the Free Software Foundation; either version
-# 2 of the Licence, or (at your option) any later version.
-#
-###############################################################################
-#include <linux/sys.h>
-#include <linux/linkage.h>
-#include <asm/smp.h>
-#include <asm/intctl-regs.h>
-#include <asm/frame.inc>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-
-###############################################################################
-#
-# Instruction TLB Miss handler entry point
-#
-###############################################################################
- .type itlb_miss,@function
-ENTRY(itlb_miss)
-#ifdef CONFIG_GDBSTUB
- movm [d2,d3,a2],(sp)
-#else
- or EPSW_nAR,epsw # switch D0-D3 & A0-A3 to the alternate
- # register bank
- nop
- nop
- nop
-#endif
-
-#if defined(CONFIG_ERRATUM_NEED_TO_RELOAD_MMUCTR)
- mov (MMUCTR),d2
- mov d2,(MMUCTR)
-#endif
-
- and ~EPSW_NMID,epsw
- mov (IPTEU),d3
- mov (PTBR),a2
- mov d3,d2
- and 0xffc00000,d2
- lsr 20,d2
- mov (a2,d2),a2 # PTD *ptd = PGD[addr 31..22]
- btst _PAGE_VALID,a2
- beq itlb_miss_fault # jump if doesn't point anywhere
-
- and ~(PAGE_SIZE-1),a2
- mov d3,d2
- and 0x003ff000,d2
- lsr 10,d2
- add d2,a2
- mov (a2),d2 # get pte from PTD[addr 21..12]
- btst _PAGE_VALID,d2
- beq itlb_miss_fault # jump if doesn't point to a page
- # (might be a swap id)
-#if ((_PAGE_ACCESSED & 0xffffff00) == 0)
- bset _PAGE_ACCESSED,(0,a2)
-#elif ((_PAGE_ACCESSED & 0xffff00ff) == 0)
- bset +(_PAGE_ACCESSED >> 8),(1,a2)
-#else
-#error "_PAGE_ACCESSED value is out of range"
-#endif
- and ~xPTEL2_UNUSED1,d2
-itlb_miss_set:
- mov d2,(IPTEL2) # change the TLB
-#ifdef CONFIG_GDBSTUB
- movm (sp),[d2,d3,a2]
-#endif
- rti
-
-itlb_miss_fault:
- mov _PAGE_VALID,d2 # force address error handler to be
- # invoked
- bra itlb_miss_set
-
- .size itlb_miss, . - itlb_miss
-
-###############################################################################
-#
-# Data TLB Miss handler entry point
-#
-###############################################################################
- .type dtlb_miss,@function
-ENTRY(dtlb_miss)
-#ifdef CONFIG_GDBSTUB
- movm [d2,d3,a2],(sp)
-#else
- or EPSW_nAR,epsw # switch D0-D3 & A0-A3 to the alternate
- # register bank
- nop
- nop
- nop
-#endif
-
-#if defined(CONFIG_ERRATUM_NEED_TO_RELOAD_MMUCTR)
- mov (MMUCTR),d2
- mov d2,(MMUCTR)
-#endif
-
- and ~EPSW_NMID,epsw
- mov (DPTEU),d3
- mov (PTBR),a2
- mov d3,d2
- and 0xffc00000,d2
- lsr 20,d2
- mov (a2,d2),a2 # PTD *ptd = PGD[addr 31..22]
- btst _PAGE_VALID,a2
- beq dtlb_miss_fault # jump if doesn't point anywhere
-
- and ~(PAGE_SIZE-1),a2
- mov d3,d2
- and 0x003ff000,d2
- lsr 10,d2
- add d2,a2
- mov (a2),d2 # get pte from PTD[addr 21..12]
- btst _PAGE_VALID,d2
- beq dtlb_miss_fault # jump if doesn't point to a page
- # (might be a swap id)
-#if ((_PAGE_ACCESSED & 0xffffff00) == 0)
- bset _PAGE_ACCESSED,(0,a2)
-#elif ((_PAGE_ACCESSED & 0xffff00ff) == 0)
- bset +(_PAGE_ACCESSED >> 8),(1,a2)
-#else
-#error "_PAGE_ACCESSED value is out of range"
-#endif
- and ~xPTEL2_UNUSED1,d2
-dtlb_miss_set:
- mov d2,(DPTEL2) # change the TLB
-#ifdef CONFIG_GDBSTUB
- movm (sp),[d2,d3,a2]
-#endif
- rti
-
-dtlb_miss_fault:
- mov _PAGE_VALID,d2 # force address error handler to be
- # invoked
- bra dtlb_miss_set
- .size dtlb_miss, . - dtlb_miss
-
-###############################################################################
-#
-# Instruction TLB Address Error handler entry point
-#
-###############################################################################
- .type itlb_aerror,@function
-ENTRY(itlb_aerror)
- add -4,sp
- SAVE_ALL
-
-#if defined(CONFIG_ERRATUM_NEED_TO_RELOAD_MMUCTR)
- mov (MMUCTR),d1
- mov d1,(MMUCTR)
-#endif
-
- and ~EPSW_NMID,epsw
- add -4,sp # need to pass three params
-
- # calculate the fault code
- movhu (MMUFCR_IFC),d1
- or 0x00010000,d1 # it's an instruction fetch
-
- # determine the page address
- mov (IPTEU),d0
- and PAGE_MASK,d0
- mov d0,(12,sp)
-
- clr d0
- mov d0,(IPTEL2)
-
- or EPSW_IE,epsw
- mov fp,d0
- call do_page_fault[],0 # do_page_fault(regs,code,addr
-
- jmp ret_from_exception
- .size itlb_aerror, . - itlb_aerror
-
-###############################################################################
-#
-# Data TLB Address Error handler entry point
-#
-###############################################################################
- .type dtlb_aerror,@function
-ENTRY(dtlb_aerror)
- add -4,sp
- SAVE_ALL
-
-#if defined(CONFIG_ERRATUM_NEED_TO_RELOAD_MMUCTR)
- mov (MMUCTR),d1
- mov d1,(MMUCTR)
-#endif
-
- add -4,sp # need to pass three params
- and ~EPSW_NMID,epsw
-
- # calculate the fault code
- movhu (MMUFCR_DFC),d1
-
- # determine the page address
- mov (DPTEU),a2
- mov a2,d0
- and PAGE_MASK,d0
- mov d0,(12,sp)
-
- clr d0
- mov d0,(DPTEL2)
-
- or EPSW_IE,epsw
- mov fp,d0
- call do_page_fault[],0 # do_page_fault(regs,code,addr
-
- jmp ret_from_exception
- .size dtlb_aerror, . - dtlb_aerror
git.samba.org / sfrench / cifs-2.6.git / blobdiff