/* SPDX-License-Identifier: GPL-2.0-only */ /* * Cache flush operations for the Hexagon architecture * * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
*/
/* Cache flushing: * * - flush_cache_all() flushes entire cache * - flush_cache_mm(mm) flushes the specified mm context's cache lines * - flush_cache_page(mm, vmaddr, pfn) flushes a single page * - flush_cache_range(vma, start, end) flushes a range of pages * - flush_icache_range(start, end) flush a range of instructions * - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache * - flush_icache_pages(vma, pg, nr) flushes(invalidates) nr pages for icache * * Need to doublecheck which one is really needed for ptrace stuff to work.
*/ #define LINESIZE 32 #define LINEBITS 5
/* * Flush Dcache range through current map.
*/ externvoid flush_dcache_range(unsignedlong start, unsignedlong end); #define flush_dcache_range flush_dcache_range
/* * Flush Icache range through current map.
*/ externvoid flush_icache_range(unsignedlong start, unsignedlong end); #define flush_icache_range flush_icache_range
/* * Memory-management related flushes are there to ensure in non-physically * indexed cache schemes that stale lines belonging to a given ASID aren't * in the cache to confuse things. The prototype Hexagon Virtual Machine * only uses a single ASID for all user-mode maps, which should * mean that they aren't necessary. A brute-force, flush-everything * implementation, with the name xxxxx_hexagon() is present in * arch/hexagon/mm/cache.c, but let's not wire it up until we know * it is needed.
*/ externvoid flush_cache_all_hexagon(void);
/* * This may or may not ever have to be non-null, depending on the * virtual machine MMU. For a native kernel, it's definitiely a no-op * * This is also the place where deferred cache coherency stuff seems * to happen, classically... but instead we do it like ia64 and * clean the cache when the PTE is set. *
*/ staticinlinevoid update_mmu_cache_range(struct vm_fault *vmf, struct vm_area_struct *vma, unsignedlong address,
pte_t *ptep, unsignedint nr)
{ /* generic_ptrace_pokedata doesn't wind up here, does it? */
}
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