45 lines
1.9 KiB
ArmAsm
45 lines
1.9 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) 2005 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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#include <grub/symbol.h>
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.file "cache.S"
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.text
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/*
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* void grub_arch_sync_caches (void *address, grub_size_t len)
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*/
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FUNCTION(grub_arch_sync_caches)
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save %o6, -0xC, %o6 ! Get a new register window,
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! reserve space on stack for
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! %i0, %i1, %i2
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brz,pn %i0, return ! Return if address == 0.
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nop
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brz,pn %i1, return ! Return if len == 0.
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clr %i2 ! index = 0.
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loop: flush %i0 + %i2 ! Flush address + index.
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cmp %i1, %i2 ! Compare len & index .
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bpos,a,pt %xcc, loop ! If len > index, loop.
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add %i2, 8, %i2 ! Go to next doubleword.
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return: ret ! Restore caller's register
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restore ! window and return.
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