Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
112 lines
2.6 KiB
C
112 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/mm.h>
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#include <asm/mmu_context.h>
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#include <asm/cache_insns.h>
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#include <asm/cacheflush.h>
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#include <asm/traps.h>
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/*
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* Write back the dirty D-caches, but not invalidate them.
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*
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* START: Virtual Address (U0, P1, or P3)
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* SIZE: Size of the region.
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*/
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static void sh4__flush_wback_region(void *start, int size)
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{
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reg_size_t aligned_start, v, cnt, end;
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aligned_start = register_align(start);
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v = aligned_start & ~(L1_CACHE_BYTES-1);
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end = (aligned_start + size + L1_CACHE_BYTES-1)
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& ~(L1_CACHE_BYTES-1);
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cnt = (end - v) / L1_CACHE_BYTES;
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while (cnt >= 8) {
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__ocbwb(v); v += L1_CACHE_BYTES;
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__ocbwb(v); v += L1_CACHE_BYTES;
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__ocbwb(v); v += L1_CACHE_BYTES;
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__ocbwb(v); v += L1_CACHE_BYTES;
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__ocbwb(v); v += L1_CACHE_BYTES;
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__ocbwb(v); v += L1_CACHE_BYTES;
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__ocbwb(v); v += L1_CACHE_BYTES;
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__ocbwb(v); v += L1_CACHE_BYTES;
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cnt -= 8;
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}
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while (cnt) {
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__ocbwb(v); v += L1_CACHE_BYTES;
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cnt--;
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}
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}
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/*
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* Write back the dirty D-caches and invalidate them.
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*
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* START: Virtual Address (U0, P1, or P3)
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* SIZE: Size of the region.
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*/
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static void sh4__flush_purge_region(void *start, int size)
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{
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reg_size_t aligned_start, v, cnt, end;
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aligned_start = register_align(start);
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v = aligned_start & ~(L1_CACHE_BYTES-1);
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end = (aligned_start + size + L1_CACHE_BYTES-1)
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& ~(L1_CACHE_BYTES-1);
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cnt = (end - v) / L1_CACHE_BYTES;
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while (cnt >= 8) {
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__ocbp(v); v += L1_CACHE_BYTES;
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__ocbp(v); v += L1_CACHE_BYTES;
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__ocbp(v); v += L1_CACHE_BYTES;
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__ocbp(v); v += L1_CACHE_BYTES;
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__ocbp(v); v += L1_CACHE_BYTES;
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__ocbp(v); v += L1_CACHE_BYTES;
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__ocbp(v); v += L1_CACHE_BYTES;
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__ocbp(v); v += L1_CACHE_BYTES;
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cnt -= 8;
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}
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while (cnt) {
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__ocbp(v); v += L1_CACHE_BYTES;
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cnt--;
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}
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}
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/*
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* No write back please
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*/
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static void sh4__flush_invalidate_region(void *start, int size)
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{
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reg_size_t aligned_start, v, cnt, end;
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aligned_start = register_align(start);
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v = aligned_start & ~(L1_CACHE_BYTES-1);
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end = (aligned_start + size + L1_CACHE_BYTES-1)
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& ~(L1_CACHE_BYTES-1);
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cnt = (end - v) / L1_CACHE_BYTES;
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while (cnt >= 8) {
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__ocbi(v); v += L1_CACHE_BYTES;
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__ocbi(v); v += L1_CACHE_BYTES;
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__ocbi(v); v += L1_CACHE_BYTES;
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__ocbi(v); v += L1_CACHE_BYTES;
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__ocbi(v); v += L1_CACHE_BYTES;
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__ocbi(v); v += L1_CACHE_BYTES;
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__ocbi(v); v += L1_CACHE_BYTES;
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__ocbi(v); v += L1_CACHE_BYTES;
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cnt -= 8;
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}
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while (cnt) {
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__ocbi(v); v += L1_CACHE_BYTES;
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cnt--;
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}
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}
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void __init sh4__flush_region_init(void)
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{
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__flush_wback_region = sh4__flush_wback_region;
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__flush_invalidate_region = sh4__flush_invalidate_region;
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__flush_purge_region = sh4__flush_purge_region;
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}
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