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ARC: Implement a function to sync and cleanup caches

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Implement specialized function to clenup caches (and therefore
sync instruction and data caches) which can be used for cleanup before linux
launch or to sync caches during U-Boot self-relocation.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
This commit is contained in:
Eugeniy Paltsev 2018-03-21 15:59:02 +03:00 committed by Alexey Brodkin
parent 95336738f1
commit 375945bac2
4 changed files with 29 additions and 5 deletions
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1
arch/arc/include/asm/cache.h
View File

@ -31,6 +31,7 @@
void cache_init(void);
void flush_n_invalidate_dcache_all(void);
void sync_n_cleanup_cache_all(void);
static const inline int is_ioc_enabled(void)
{

4
arch/arc/lib/bootm.c
View File

@ -4,6 +4,7 @@
* SPDX-License-Identifier: GPL-2.0+
*/
#include <asm/cache.h>
#include <common.h>
DECLARE_GLOBAL_DATA_PTR;
@ -40,8 +41,7 @@ void arch_lmb_reserve(struct lmb *lmb)
static int cleanup_before_linux(void)
{
disable_interrupts();
flush_dcache_all();
invalidate_icache_all();
sync_n_cleanup_cache_all();
return 0;
}

23
arch/arc/lib/cache.c
View File

@ -591,3 +591,26 @@ void flush_dcache_all(void)
if (is_isa_arcv2() && !slc_data_bypass())
__slc_entire_op(OP_FLUSH);
}
/*
* This is function to cleanup all caches (and therefore sync I/D caches) which
* can be used for cleanup before linux launch or to sync caches during
* relocation.
*/
void sync_n_cleanup_cache_all(void)
{
__dc_entire_op(OP_FLUSH_N_INV);
/*
* If SL$ is bypassed for data it is used only for instructions,
* and we shouldn't flush it. So invalidate it instead of flush_n_inv.
*/
if (is_isa_arcv2()) {
if (slc_data_bypass())
__slc_entire_op(OP_INV);
else
__slc_entire_op(OP_FLUSH_N_INV);
}
__ic_entire_invalidate();
}

6
arch/arc/lib/init_helpers.c
View File

@ -4,14 +4,14 @@
* SPDX-License-Identifier: GPL-2.0+
*/
#include <asm/cache.h>
#include <common.h>
DECLARE_GLOBAL_DATA_PTR;
int init_cache_f_r(void)
{
#ifndef CONFIG_SYS_DCACHE_OFF
flush_dcache_all();
#endif
sync_n_cleanup_cache_all();
return 0;
}