mirror of
https://git.proxmox.com/git/grub2
synced 2025-11-04 05:29:42 +00:00
126 lines
2.8 KiB
ArmAsm
126 lines
2.8 KiB
ArmAsm
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2013 Free Software Foundation, Inc.
|
|
*
|
|
* GRUB is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* GRUB is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <grub/symbol.h>
|
|
|
|
.file "cache_armv7.S"
|
|
.text
|
|
.syntax unified
|
|
#if !defined (__thumb2__)
|
|
.arch armv7a
|
|
.arm
|
|
#else
|
|
.arch armv7
|
|
.thumb
|
|
#endif
|
|
# define DMB dmb
|
|
# define DSB dsb
|
|
# define ISB isb
|
|
#define ARMV7 1
|
|
|
|
@ r0 - CLIDR
|
|
@ r1 - LoC
|
|
@ r2 - current level
|
|
@ r3 - num sets
|
|
@ r4 - num ways
|
|
@ r5 - current set
|
|
@ r6 - current way
|
|
@ r7 - line size
|
|
@ r8 - scratch
|
|
@ r9 - scratch
|
|
@ r10 - scratch
|
|
@ r11 - scratch
|
|
clean_invalidate_dcache:
|
|
push {r4-r12, lr}
|
|
mrc p15, 1, r0, c0, c0, 1 @ Read CLIDR
|
|
lsr r1, r0, #24 @ Extract LoC
|
|
and r1, r1, #0x7
|
|
|
|
mov r2, #0 @ First level, L1
|
|
2: and r8, r0, #7 @ cache type at current level
|
|
cmp r8, #2
|
|
blt 5f @ instruction only, or none, skip level
|
|
|
|
@ set current cache level/type (for CCSIDR read)
|
|
lsl r8, r2, #1
|
|
mcr p15, 2, r8, c0, c0, 0 @ Write CSSELR (level, type: data/uni)
|
|
|
|
@ read current cache information
|
|
mrc p15, 1, r8, c0, c0, 0 @ Read CCSIDR
|
|
lsr r3, r8, #13 @ Number of sets -1
|
|
|
|
@ Keep only 14 bits of r3
|
|
lsl r3, r3, #18
|
|
lsr r3, r3, #18
|
|
|
|
lsr r4, r8, #3 @ Number of ways -1
|
|
|
|
@ Keep only 9 bits of r4
|
|
lsl r4, r4, #23
|
|
lsr r4, r4, #23
|
|
|
|
and r7, r8, #7 @ log2(line size in words) - 2
|
|
add r7, r7, #2 @ adjust
|
|
mov r8, #1
|
|
lsl r7, r8, r7 @ -> line size in words
|
|
lsl r7, r7, #2 @ -> bytes
|
|
|
|
@ set loop
|
|
mov r5, #0 @ current set = 0
|
|
3: lsl r8, r2, #1 @ insert level
|
|
clz r9, r7 @ calculate set field offset
|
|
mov r10, #31
|
|
sub r9, r10, r9
|
|
lsl r10, r5, r9
|
|
orr r8, r8, r10 @ insert set field
|
|
|
|
@ way loop
|
|
@ calculate way field offset
|
|
mov r6, #0 @ current way = 0
|
|
add r10, r4, #1
|
|
clz r9, r10 @ r9 = way field offset
|
|
add r9, r9, #1
|
|
4: lsl r10, r6, r9
|
|
orr r11, r8, r10 @ insert way field
|
|
|
|
@ clean and invalidate line by set/way
|
|
mcr p15, 0, r11, c7, c14, 2 @ DCCISW
|
|
|
|
@ next way
|
|
add r6, r6, #1
|
|
cmp r6, r4
|
|
ble 4b
|
|
|
|
@ next set
|
|
add r5, r5, #1
|
|
cmp r5, r3
|
|
ble 3b
|
|
|
|
@ next level
|
|
5: lsr r0, r0, #3 @ align next level CLIDR 'type' field
|
|
add r2, r2, #1 @ increment cache level counter
|
|
cmp r2, r1
|
|
blt 2b @ outer loop
|
|
|
|
@ return
|
|
6: DSB
|
|
ISB
|
|
pop {r4-r12, lr}
|
|
bx lr
|
|
|
|
#include "cache.S" |