| David Howells | 7f386ac | 2011-03-18 16:54:30 +0000 | [diff] [blame] | 1 | /* MN10300 CPU cache invalidation routines, using automatic purge registers |
| 2 | * |
| 3 | * Copyright (C) 2011 Red Hat, Inc. All Rights Reserved. |
| 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public Licence |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the Licence, or (at your option) any later version. |
| 10 | */ |
| 11 | #include <linux/sys.h> |
| 12 | #include <linux/linkage.h> |
| 13 | #include <asm/cache.h> |
| 14 | #include <asm/irqflags.h> |
| 15 | #include <asm/cacheflush.h> |
| 16 | #include "cache.inc" |
| 17 | |
| 18 | .am33_2 |
| 19 | |
| 20 | .globl debugger_local_cache_flushinv_one |
| 21 | |
| 22 | ############################################################################### |
| 23 | # |
| 24 | # void debugger_local_cache_flushinv_one(u8 *addr) |
| 25 | # |
| 26 | # Invalidate one particular cacheline if it's in the icache |
| 27 | # |
| 28 | ############################################################################### |
| 29 | ALIGN |
| 30 | .globl debugger_local_cache_flushinv_one |
| 31 | .type debugger_local_cache_flushinv_one,@function |
| 32 | debugger_local_cache_flushinv_one: |
| 33 | mov d0,a1 |
| 34 | |
| 35 | mov CHCTR,a0 |
| 36 | movhu (a0),d0 |
| 37 | btst CHCTR_ICEN,d0 |
| 38 | beq mn10300_local_icache_inv_range_reg_end |
| 39 | |
| 40 | LOCAL_CLI_SAVE(d1) |
| 41 | |
| 42 | mov ICIVCR,a0 |
| 43 | |
| 44 | # wait for the invalidator to quiesce |
| 45 | setlb |
| 46 | mov (a0),d0 |
| 47 | btst ICIVCR_ICIVBSY,d0 |
| 48 | lne |
| 49 | |
| 50 | # set the mask |
| 51 | mov ~L1_CACHE_TAG_MASK,d0 |
| 52 | mov d0,(ICIVMR) |
| 53 | |
| 54 | # invalidate the cache line at the given address |
| 55 | and ~L1_CACHE_TAG_MASK,a1 |
| 56 | or ICIVCR_ICI,a1 |
| 57 | mov a1,(a0) |
| 58 | |
| 59 | # wait for the invalidator to quiesce again |
| 60 | setlb |
| 61 | mov (a0),d0 |
| 62 | btst ICIVCR_ICIVBSY,d0 |
| 63 | lne |
| 64 | |
| 65 | LOCAL_IRQ_RESTORE(d1) |
| 66 | |
| 67 | mn10300_local_icache_inv_range_reg_end: |
| 68 | ret [],0 |
| 69 | .size debugger_local_cache_flushinv_one,.-debugger_local_cache_flushinv_one |