46 lines
1.4 KiB
ArmAsm
46 lines
1.4 KiB
ArmAsm
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/* cache.S - Flush the processor cache for a specific region. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2004 Free Software Foundation, Inc.
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*
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#define CACHE_LINE_BYTES 32
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.text
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.align 2
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.globl grub_arch_sync_caches
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grub_arch_sync_caches:
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/* Force the dcache lines to memory. */
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li 5, 0
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1: dcbst 5, 3
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addi 5, 5, CACHE_LINE_BYTES
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cmpw 5, 4
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blt 1b
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sync /* Force all dcbsts to complete. */
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/* Invalidate the icache lines. */
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li 5, 0
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1: icbi 5, 3
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addi 5, 5, CACHE_LINE_BYTES
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cmpw 5, 4
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blt 1b
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sync /* Force all icbis to complete. */
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isync /* Discard partially executed instructions that were
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loaded from the invalid icache. */
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blr
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