68 lines
1.8 KiB
ArmAsm
68 lines
1.8 KiB
ArmAsm
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2013 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/symbol.h>
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.file "cache_flush.S"
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.text
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/*
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* Simple cache maintenance functions
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*/
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// r0 - *beg (inclusive)
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// r1 - *end (exclusive)
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clean_dcache_range:
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// Clean data cache for range to point-of-unification
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ldr x2, =EXT_C(grub_arch_cache_dlinesz)
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ldr x2, [x2]
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1: cmp x0, x1
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bge 2f
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dc cvau, x0 // Clean Virtual Address to PoU
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add x0, x0, x2 // Next line
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b 1b
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2: dsb ish
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ret
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// r0 - *beg (inclusive)
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// r1 - *end (exclusive)
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invalidate_icache_range:
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// Invalidate instruction cache for range to point-of-unification
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ldr x2, =EXT_C(grub_arch_cache_ilinesz)
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ldr x2, [x2]
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1: cmp x0, x1
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bge 2f
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ic ivau, x0 // Invalidate Virtual Address to PoU
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add x0, x0, x2 // Next line
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b 1b
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// Branch predictor invalidation not needed on AArch64
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2: dsb ish
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isb
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ret
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// void grub_arch_sync_caches_real (void *address, grub_size_t len)
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FUNCTION(grub_arch_sync_caches_real)
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dsb ish
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stp x0, x30, [sp, #-16]!
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stp x0, x1, [sp, #-16]!
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bl clean_dcache_range
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ldp x0, x1, [sp], #16
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bl invalidate_icache_range
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ldp x0, x30, [sp], #16
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ret
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