mirror of https://github.com/ARMmbed/mbed-os.git
95 lines
4.6 KiB
ArmAsm
95 lines
4.6 KiB
ArmAsm
/* Copyright (c) 2009 - 2012 ARM LIMITED
|
|
|
|
All rights reserved.
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
- Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
- Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
- Neither the name of ARM nor the names of its contributors may be used
|
|
to endorse or promote products derived from this software without
|
|
specific prior written permission.
|
|
*
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
---------------------------------------------------------------------------*/
|
|
|
|
/*----------------------------------------------------------------------------
|
|
* Functions
|
|
*---------------------------------------------------------------------------*/
|
|
.text
|
|
.global __v7_all_cache
|
|
/*
|
|
* __STATIC_ASM void __v7_all_cache(uint32_t op) {
|
|
*/
|
|
__v7_all_cache:
|
|
.arm
|
|
|
|
PUSH {R4-R11}
|
|
|
|
MRC p15, 1, R6, c0, c0, 1 /* Read CLIDR */
|
|
ANDS R3, R6, #0x07000000 /* Extract coherency level */
|
|
MOV R3, R3, LSR #23 /* Total cache levels << 1 */
|
|
BEQ Finished /* If 0, no need to clean */
|
|
|
|
MOV R10, #0 /* R10 holds current cache level << 1 */
|
|
Loop1: ADD R2, R10, R10, LSR #1 /* R2 holds cache "Set" position */
|
|
MOV R1, R6, LSR R2 /* Bottom 3 bits are the Cache-type for this level */
|
|
AND R1, R1, #7 /* Isolate those lower 3 bits */
|
|
CMP R1, #2
|
|
BLT Skip /* No cache or only instruction cache at this level */
|
|
|
|
MCR p15, 2, R10, c0, c0, 0 /* Write the Cache Size selection register */
|
|
ISB /* ISB to sync the change to the CacheSizeID reg */
|
|
MRC p15, 1, R1, c0, c0, 0 /* Reads current Cache Size ID register */
|
|
AND R2, R1, #7 /* Extract the line length field */
|
|
ADD R2, R2, #4 /* Add 4 for the line length offset (log2 16 bytes) */
|
|
LDR R4, =0x3FF
|
|
ANDS R4, R4, R1, LSR #3 /* R4 is the max number on the way size (right aligned) */
|
|
CLZ R5, R4 /* R5 is the bit position of the way size increment */
|
|
LDR R7, =0x7FFF
|
|
ANDS R7, R7, R1, LSR #13 /* R7 is the max number of the index size (right aligned) */
|
|
|
|
Loop2: MOV R9, R4 /* R9 working copy of the max way size (right aligned) */
|
|
|
|
Loop3: ORR R11, R10, R9, LSL R5 /* Factor in the Way number and cache number into R11 */
|
|
ORR R11, R11, R7, LSL R2 /* Factor in the Set number */
|
|
CMP R0, #0
|
|
BNE Dccsw
|
|
MCR p15, 0, R11, c7, c6, 2 /* DCISW. Invalidate by Set/Way */
|
|
B cont
|
|
Dccsw: CMP R0, #1
|
|
BNE Dccisw
|
|
MCR p15, 0, R11, c7, c10, 2 /* DCCSW. Clean by Set/Way */
|
|
B cont
|
|
Dccisw: MCR p15, 0, R11, c7, c14, 2 /* DCCISW, Clean and Invalidate by Set/Way */
|
|
cont: SUBS R9, R9, #1 /* Decrement the Way number */
|
|
BGE Loop3
|
|
SUBS R7, R7, #1 /* Decrement the Set number */
|
|
BGE Loop2
|
|
Skip: ADD R10, R10, #2 /* increment the cache number */
|
|
CMP R3, R10
|
|
BGT Loop1
|
|
|
|
Finished:
|
|
DSB
|
|
POP {R4-R11}
|
|
BX lr
|
|
|
|
|
|
.END
|
|
/*----------------------------------------------------------------------------
|
|
* end of file
|
|
*---------------------------------------------------------------------------*/
|