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08dbd0f8ef
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 and only version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 51 franklin street fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 94 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141334.043630402@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
126 lines
2.3 KiB
C
126 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Cache management functions for Hexagon
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*
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* Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
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*/
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#include <linux/mm.h>
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#include <asm/cacheflush.h>
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#include <asm/hexagon_vm.h>
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#define spanlines(start, end) \
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(((end - (start & ~(LINESIZE - 1))) >> LINEBITS) + 1)
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void flush_dcache_range(unsigned long start, unsigned long end)
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{
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unsigned long lines = spanlines(start, end-1);
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unsigned long i, flags;
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start &= ~(LINESIZE - 1);
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local_irq_save(flags);
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for (i = 0; i < lines; i++) {
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__asm__ __volatile__ (
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" dccleaninva(%0); "
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:
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: "r" (start)
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);
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start += LINESIZE;
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}
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local_irq_restore(flags);
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}
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void flush_icache_range(unsigned long start, unsigned long end)
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{
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unsigned long lines = spanlines(start, end-1);
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unsigned long i, flags;
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start &= ~(LINESIZE - 1);
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local_irq_save(flags);
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for (i = 0; i < lines; i++) {
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__asm__ __volatile__ (
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" dccleana(%0); "
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" icinva(%0); "
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:
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: "r" (start)
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);
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start += LINESIZE;
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}
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__asm__ __volatile__ (
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"isync"
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);
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local_irq_restore(flags);
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}
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EXPORT_SYMBOL(flush_icache_range);
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void hexagon_clean_dcache_range(unsigned long start, unsigned long end)
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{
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unsigned long lines = spanlines(start, end-1);
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unsigned long i, flags;
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start &= ~(LINESIZE - 1);
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local_irq_save(flags);
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for (i = 0; i < lines; i++) {
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__asm__ __volatile__ (
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" dccleana(%0); "
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:
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: "r" (start)
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);
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start += LINESIZE;
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}
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local_irq_restore(flags);
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}
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void hexagon_inv_dcache_range(unsigned long start, unsigned long end)
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{
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unsigned long lines = spanlines(start, end-1);
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unsigned long i, flags;
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start &= ~(LINESIZE - 1);
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local_irq_save(flags);
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for (i = 0; i < lines; i++) {
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__asm__ __volatile__ (
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" dcinva(%0); "
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:
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: "r" (start)
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);
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start += LINESIZE;
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}
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local_irq_restore(flags);
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}
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/*
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* This is just really brutal and shouldn't be used anyways,
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* especially on V2. Left here just in case.
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*/
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void flush_cache_all_hexagon(void)
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{
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unsigned long flags;
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local_irq_save(flags);
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__vmcache_ickill();
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__vmcache_dckill();
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__vmcache_l2kill();
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local_irq_restore(flags);
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mb();
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}
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void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
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unsigned long vaddr, void *dst, void *src, int len)
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{
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memcpy(dst, src, len);
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if (vma->vm_flags & VM_EXEC) {
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flush_icache_range((unsigned long) dst,
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(unsigned long) dst + len);
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}
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}
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