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126 lines
2.3 KiB
126 lines
2.3 KiB
// 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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