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