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Superseded
This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.
Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.
If you are looking for a stable and tested release, please import one of the official mbed library releases:
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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.
Last commit 20 Feb 2019 by 
mbed official
targets/cmsis/TOOLCHAIN_GCC/TARGET_CORTEX_A/cache.S@577:15494b56c2f3, 2015-07-01 (annotated)
- Committer:
- mbed_official
- Date:
- Wed Jul 01 08:15:11 2015 +0100
- Revision:
- 577:15494b56c2f3
- Parent:
- targets/cmsis/TOOLCHAIN_GCC/TARGET_CORTEX_A/cache.s@502:542898c8d189
Synchronized with git revision 7766e75dd858812cd79aedb3080349715f55dd56
Full URL: https://github.com/mbedmicro/mbed/commit/7766e75dd858812cd79aedb3080349715f55dd56/
GCC asm updates
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| mbed_official | 482:d9a48e768ce0 | 1 | /* Copyright (c) 2009 - 2012 ARM LIMITED |
| mbed_official | 482:d9a48e768ce0 | 2 | |
| mbed_official | 482:d9a48e768ce0 | 3 | All rights reserved. |
| mbed_official | 482:d9a48e768ce0 | 4 | Redistribution and use in source and binary forms, with or without |
| mbed_official | 482:d9a48e768ce0 | 5 | modification, are permitted provided that the following conditions are met: |
| mbed_official | 482:d9a48e768ce0 | 6 | - Redistributions of source code must retain the above copyright |
| mbed_official | 482:d9a48e768ce0 | 7 | notice, this list of conditions and the following disclaimer. |
| mbed_official | 482:d9a48e768ce0 | 8 | - Redistributions in binary form must reproduce the above copyright |
| mbed_official | 482:d9a48e768ce0 | 9 | notice, this list of conditions and the following disclaimer in the |
| mbed_official | 482:d9a48e768ce0 | 10 | documentation and/or other materials provided with the distribution. |
| mbed_official | 482:d9a48e768ce0 | 11 | - Neither the name of ARM nor the names of its contributors may be used |
| mbed_official | 482:d9a48e768ce0 | 12 | to endorse or promote products derived from this software without |
| mbed_official | 482:d9a48e768ce0 | 13 | specific prior written permission. |
| mbed_official | 482:d9a48e768ce0 | 14 | * |
| mbed_official | 482:d9a48e768ce0 | 15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| mbed_official | 482:d9a48e768ce0 | 16 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| mbed_official | 482:d9a48e768ce0 | 17 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| mbed_official | 482:d9a48e768ce0 | 18 | ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE |
| mbed_official | 482:d9a48e768ce0 | 19 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| mbed_official | 482:d9a48e768ce0 | 20 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| mbed_official | 482:d9a48e768ce0 | 21 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| mbed_official | 482:d9a48e768ce0 | 22 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| mbed_official | 482:d9a48e768ce0 | 23 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| mbed_official | 482:d9a48e768ce0 | 24 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| mbed_official | 482:d9a48e768ce0 | 25 | POSSIBILITY OF SUCH DAMAGE. |
| mbed_official | 482:d9a48e768ce0 | 26 | ---------------------------------------------------------------------------*/ |
| mbed_official | 482:d9a48e768ce0 | 27 | |
| mbed_official | 482:d9a48e768ce0 | 28 | /*---------------------------------------------------------------------------- |
| mbed_official | 482:d9a48e768ce0 | 29 | * Functions |
| mbed_official | 482:d9a48e768ce0 | 30 | *---------------------------------------------------------------------------*/ |
| mbed_official | 482:d9a48e768ce0 | 31 | .text |
| mbed_official | 482:d9a48e768ce0 | 32 | .global __v7_all_cache |
| mbed_official | 482:d9a48e768ce0 | 33 | /* |
| mbed_official | 482:d9a48e768ce0 | 34 | * __STATIC_ASM void __v7_all_cache(uint32_t op) { |
| mbed_official | 482:d9a48e768ce0 | 35 | */ |
| mbed_official | 482:d9a48e768ce0 | 36 | __v7_all_cache: |
| mbed_official | 482:d9a48e768ce0 | 37 | .arm |
| mbed_official | 482:d9a48e768ce0 | 38 | |
| mbed_official | 482:d9a48e768ce0 | 39 | PUSH {R4-R11} |
| mbed_official | 482:d9a48e768ce0 | 40 | |
| mbed_official | 502:542898c8d189 | 41 | MRC p15, 1, R6, c0, c0, 1 /* Read CLIDR */ |
| mbed_official | 502:542898c8d189 | 42 | ANDS R3, R6, #0x07000000 /* Extract coherency level */ |
| mbed_official | 502:542898c8d189 | 43 | MOV R3, R3, LSR #23 /* Total cache levels << 1 */ |
| mbed_official | 502:542898c8d189 | 44 | BEQ Finished /* If 0, no need to clean */ |
| mbed_official | 482:d9a48e768ce0 | 45 | |
| mbed_official | 502:542898c8d189 | 46 | MOV R10, #0 /* R10 holds current cache level << 1 */ |
| mbed_official | 502:542898c8d189 | 47 | Loop1: ADD R2, R10, R10, LSR #1 /* R2 holds cache "Set" position */ |
| mbed_official | 502:542898c8d189 | 48 | MOV R1, R6, LSR R2 /* Bottom 3 bits are the Cache-type for this level */ |
| mbed_official | 502:542898c8d189 | 49 | AND R1, R1, #7 /* Isolate those lower 3 bits */ |
| mbed_official | 482:d9a48e768ce0 | 50 | CMP R1, #2 |
| mbed_official | 502:542898c8d189 | 51 | BLT Skip /* No cache or only instruction cache at this level */ |
| mbed_official | 482:d9a48e768ce0 | 52 | |
| mbed_official | 502:542898c8d189 | 53 | MCR p15, 2, R10, c0, c0, 0 /* Write the Cache Size selection register */ |
| mbed_official | 502:542898c8d189 | 54 | ISB /* ISB to sync the change to the CacheSizeID reg */ |
| mbed_official | 502:542898c8d189 | 55 | MRC p15, 1, R1, c0, c0, 0 /* Reads current Cache Size ID register */ |
| mbed_official | 502:542898c8d189 | 56 | AND R2, R1, #7 /* Extract the line length field */ |
| mbed_official | 502:542898c8d189 | 57 | ADD R2, R2, #4 /* Add 4 for the line length offset (log2 16 bytes) */ |
| mbed_official | 482:d9a48e768ce0 | 58 | LDR R4, =0x3FF |
| mbed_official | 502:542898c8d189 | 59 | ANDS R4, R4, R1, LSR #3 /* R4 is the max number on the way size (right aligned) */ |
| mbed_official | 502:542898c8d189 | 60 | CLZ R5, R4 /* R5 is the bit position of the way size increment */ |
| mbed_official | 482:d9a48e768ce0 | 61 | LDR R7, =0x7FFF |
| mbed_official | 502:542898c8d189 | 62 | ANDS R7, R7, R1, LSR #13 /* R7 is the max number of the index size (right aligned) */ |
| mbed_official | 482:d9a48e768ce0 | 63 | |
| mbed_official | 502:542898c8d189 | 64 | Loop2: MOV R9, R4 /* R9 working copy of the max way size (right aligned) */ |
| mbed_official | 482:d9a48e768ce0 | 65 | |
| mbed_official | 502:542898c8d189 | 66 | Loop3: ORR R11, R10, R9, LSL R5 /* Factor in the Way number and cache number into R11 */ |
| mbed_official | 502:542898c8d189 | 67 | ORR R11, R11, R7, LSL R2 /* Factor in the Set number */ |
| mbed_official | 482:d9a48e768ce0 | 68 | CMP R0, #0 |
| mbed_official | 482:d9a48e768ce0 | 69 | BNE Dccsw |
| mbed_official | 502:542898c8d189 | 70 | MCR p15, 0, R11, c7, c6, 2 /* DCISW. Invalidate by Set/Way */ |
| mbed_official | 482:d9a48e768ce0 | 71 | B cont |
| mbed_official | 482:d9a48e768ce0 | 72 | Dccsw: CMP R0, #1 |
| mbed_official | 482:d9a48e768ce0 | 73 | BNE Dccisw |
| mbed_official | 502:542898c8d189 | 74 | MCR p15, 0, R11, c7, c10, 2 /* DCCSW. Clean by Set/Way */ |
| mbed_official | 482:d9a48e768ce0 | 75 | B cont |
| mbed_official | 502:542898c8d189 | 76 | Dccisw: MCR p15, 0, R11, c7, c14, 2 /* DCCISW, Clean and Invalidate by Set/Way */ |
| mbed_official | 502:542898c8d189 | 77 | cont: SUBS R9, R9, #1 /* Decrement the Way number */ |
| mbed_official | 482:d9a48e768ce0 | 78 | BGE Loop3 |
| mbed_official | 502:542898c8d189 | 79 | SUBS R7, R7, #1 /* Decrement the Set number */ |
| mbed_official | 482:d9a48e768ce0 | 80 | BGE Loop2 |
| mbed_official | 502:542898c8d189 | 81 | Skip: ADD R10, R10, #2 /* increment the cache number */ |
| mbed_official | 482:d9a48e768ce0 | 82 | CMP R3, R10 |
| mbed_official | 482:d9a48e768ce0 | 83 | BGT Loop1 |
| mbed_official | 482:d9a48e768ce0 | 84 | |
| mbed_official | 482:d9a48e768ce0 | 85 | Finished: |
| mbed_official | 482:d9a48e768ce0 | 86 | DSB |
| mbed_official | 482:d9a48e768ce0 | 87 | POP {R4-R11} |
| mbed_official | 482:d9a48e768ce0 | 88 | BX lr |
| mbed_official | 482:d9a48e768ce0 | 89 | |
| mbed_official | 482:d9a48e768ce0 | 90 | |
| mbed_official | 482:d9a48e768ce0 | 91 | .END |
| mbed_official | 482:d9a48e768ce0 | 92 | /*---------------------------------------------------------------------------- |
| mbed_official | 482:d9a48e768ce0 | 93 | * end of file |
| mbed_official | 482:d9a48e768ce0 | 94 | *---------------------------------------------------------------------------*/ |
