https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: a188339ca5a396acc588e5851ed7e19f66b0ebd9 authored by Linus Torvalds on 19 May 2019, 22:47:09 UTC
Linux 5.2-rc1
Linux 5.2-rc1
Tip revision: a188339
l2c-l2x0-resume.S
/* SPDX-License-Identifier: GPL-2.0 */
/*
* L2C-310 early resume code. This can be used by platforms to restore
* the settings of their L2 cache controller before restoring the
* processor state.
*
* This code can only be used to if you are running in the secure world.
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/hardware/cache-l2x0.h>
.text
ENTRY(l2c310_early_resume)
adr r0, 1f
ldr r2, [r0]
add r0, r2, r0
ldmia r0, {r1, r2, r3, r4, r5, r6, r7, r8}
@ r1 = phys address of L2C-310 controller
@ r2 = aux_ctrl
@ r3 = tag_latency
@ r4 = data_latency
@ r5 = filter_start
@ r6 = filter_end
@ r7 = prefetch_ctrl
@ r8 = pwr_ctrl
@ Check that the address has been initialised
teq r1, #0
reteq lr
@ The prefetch and power control registers are revision dependent
@ and can be written whether or not the L2 cache is enabled
ldr r0, [r1, #L2X0_CACHE_ID]
and r0, r0, #L2X0_CACHE_ID_RTL_MASK
cmp r0, #L310_CACHE_ID_RTL_R2P0
strcs r7, [r1, #L310_PREFETCH_CTRL]
cmp r0, #L310_CACHE_ID_RTL_R3P0
strcs r8, [r1, #L310_POWER_CTRL]
@ Don't setup the L2 cache if it is already enabled
ldr r0, [r1, #L2X0_CTRL]
tst r0, #L2X0_CTRL_EN
retne lr
str r3, [r1, #L310_TAG_LATENCY_CTRL]
str r4, [r1, #L310_DATA_LATENCY_CTRL]
str r6, [r1, #L310_ADDR_FILTER_END]
str r5, [r1, #L310_ADDR_FILTER_START]
str r2, [r1, #L2X0_AUX_CTRL]
mov r9, #L2X0_CTRL_EN
str r9, [r1, #L2X0_CTRL]
ret lr
ENDPROC(l2c310_early_resume)
.align
1: .long l2x0_saved_regs - .