30 lines
594 B
C
30 lines
594 B
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Contains routines needed to support swiotlb for ppc.
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*
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* Copyright (C) 2009-2010 Freescale Semiconductor, Inc.
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* Author: Becky Bruce
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*/
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#include <linux/memblock.h>
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#include <asm/machdep.h>
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#include <asm/swiotlb.h>
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unsigned int ppc_swiotlb_enable;
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void __init swiotlb_detect_4g(void)
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{
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if ((memblock_end_of_DRAM() - 1) > 0xffffffff)
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ppc_swiotlb_enable = 1;
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}
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static int __init check_swiotlb_enabled(void)
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{
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if (ppc_swiotlb_enable)
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swiotlb_print_info();
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else
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swiotlb_exit();
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return 0;
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}
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subsys_initcall(check_swiotlb_enabled);
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