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authorJiri Kosina <jkosina@suse.cz>2011-04-26 10:22:15 +0200
committerJiri Kosina <jkosina@suse.cz>2011-04-26 10:22:59 +0200
commit07f9479a40cc778bc1462ada11f95b01360ae4ff (patch)
tree0676cf38df3844004bb3ebfd99dfa67a4a8998f5 /arch/mn10300/kernel/gdb-cache.S
parent9d5e6bdb3013acfb311ab407eeca0b6a6a3dedbf (diff)
parentcd2e49e90f1cae7726c9a2c54488d881d7f1cd1c (diff)
Merge branch 'master' into for-next
Fast-forwarded to current state of Linus' tree as there are patches to be applied for files that didn't exist on the old branch.
Diffstat (limited to 'arch/mn10300/kernel/gdb-cache.S')
-rw-r--r--arch/mn10300/kernel/gdb-cache.S105
1 files changed, 0 insertions, 105 deletions
diff --git a/arch/mn10300/kernel/gdb-cache.S b/arch/mn10300/kernel/gdb-cache.S
deleted file mode 100644
index 1108badc3d32..000000000000
--- a/arch/mn10300/kernel/gdb-cache.S
+++ /dev/null
@@ -1,105 +0,0 @@
-###############################################################################
-#
-# MN10300 Low-level cache purging routines for gdbstub
-#
-# Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
-# Written 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/cache.h>
-#include <asm/cpu-regs.h>
-#include <asm/exceptions.h>
-#include <asm/frame.inc>
-#include <asm/serial-regs.h>
-
- .text
-
-###############################################################################
-#
-# GDB stub cache purge
-#
-###############################################################################
- .type gdbstub_purge_cache,@function
-ENTRY(gdbstub_purge_cache)
- #######################################################################
- # read the addresses tagged in the cache's tag RAM and attempt to flush
- # those addresses specifically
- # - we rely on the hardware to filter out invalid tag entry addresses
- mov DCACHE_TAG(0,0),a0 # dcache tag RAM access address
- mov DCACHE_PURGE(0,0),a1 # dcache purge request address
- mov L1_CACHE_NWAYS*L1_CACHE_NENTRIES,d1 # total number of entries
-
-mn10300_dcache_flush_loop:
- mov (a0),d0
- and L1_CACHE_TAG_ADDRESS|L1_CACHE_TAG_ENTRY,d0
- or L1_CACHE_TAG_VALID,d0 # retain valid entries in the
- # cache
- mov d0,(a1) # conditional purge
-
-mn10300_dcache_flush_skip:
- add L1_CACHE_BYTES,a0
- add L1_CACHE_BYTES,a1
- add -1,d1
- bne mn10300_dcache_flush_loop
-
-;; # unconditionally flush and invalidate the dcache
-;; mov DCACHE_PURGE(0,0),a1 # dcache purge request address
-;; mov L1_CACHE_NWAYS*L1_CACHE_NENTRIES,d1 # total number of
-;; # entries
-;;
-;; gdbstub_purge_cache__dcache_loop:
-;; mov (a1),d0 # unconditional purge
-;;
-;; add L1_CACHE_BYTES,a1
-;; add -1,d1
-;; bne gdbstub_purge_cache__dcache_loop
-
- #######################################################################
- # now invalidate the icache
- mov CHCTR,a0
- movhu (a0),a1
-
- mov epsw,d1
- and ~EPSW_IE,epsw
- nop
- nop
-
- # disable the icache
- and ~CHCTR_ICEN,d0
- movhu d0,(a0)
-
- # and wait for it to calm down
- setlb
- movhu (a0),d0
- btst CHCTR_ICBUSY,d0
- lne
-
- # invalidate
- or CHCTR_ICINV,d0
- movhu d0,(a0)
-
- # wait for the cache to finish
- mov CHCTR,a0
- setlb
- movhu (a0),d0
- btst CHCTR_ICBUSY,d0
- lne
-
- # and reenable it
- movhu a1,(a0)
- movhu (a0),d0 # read back to flush
- # (SIGILLs all over without this)
-
- mov d1,epsw
-
- ret [],0
-
- .size gdbstub_purge_cache,.-gdbstub_purge_cache