linux/arch/nios2/include/asm/tlb.h

/*
 * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
 * Copyright (C) 2009 Wind River Systems Inc
 * Copyright (C) 2004 Microtronix Datacom Ltd.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License. See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#ifndef _ASM_NIOS2_TLB_H
#define _ASM_NIOS2_TLB_H

extern void set_mmu_pid(unsigned long pid);

/*
 * NIOS32 does have flush_tlb_range(), but it lacks a limit and fallback to
 * full mm invalidation. So use flush_tlb_mm() for everything.
 */

#include <linux/pagemap.h>
#include <asm-generic/tlb.h>

#endif /* _ASM_NIOS2_TLB_H */
nios2: TLB handling This patch adds the TLB maintenance functions. Signed-off-by: Ley Foon Tan <lftan@altera.com> 2014-11-06 10:19:50 +03:00			`/*`
			`* Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>`
			`* Copyright (C) 2009 Wind River Systems Inc`
			`* Copyright (C) 2004 Microtronix Datacom Ltd.`
			`*`
			`* This file is subject to the terms and conditions of the GNU General Public`
			`* License. See the file "COPYING" in the main directory of this archive`
			`* for more details.`
			`*/`

			`#ifndef _ASM_NIOS2_TLB_H`
			`#define _ASM_NIOS2_TLB_H`

			`extern void set_mmu_pid(unsigned long pid);`

arch/tlb: Clean up simple architectures For the architectures that do not implement their own tlb_flush() but do already use the generic mmu_gather, there are two options: 1) the platform has an efficient flush_tlb_range() and asm-generic/tlb.h doesn't need any overrides at all. 2) the platform lacks an efficient flush_tlb_range() and we select MMU_GATHER_NO_RANGE to minimize full invalidates. Convert all 'simple' architectures to one of these two forms. alpha: has no range invalidate -> 2 arc: already used flush_tlb_range() -> 1 c6x: has no range invalidate -> 2 hexagon: has an efficient flush_tlb_range() -> 1 (flush_tlb_mm() is in fact a full range invalidate, so no need to shoot down everything) m68k: has inefficient flush_tlb_range() -> 2 microblaze: has no flush_tlb_range() -> 2 mips: has efficient flush_tlb_range() -> 1 (even though it currently seems to use flush_tlb_mm()) nds32: already uses flush_tlb_range() -> 1 nios2: has inefficient flush_tlb_range() -> 2 (no limit on range iteration) openrisc: has inefficient flush_tlb_range() -> 2 (no limit on range iteration) parisc: already uses flush_tlb_range() -> 1 sparc32: already uses flush_tlb_range() -> 1 unicore32: has inefficient flush_tlb_range() -> 2 (no limit on range iteration) xtensa: has efficient flush_tlb_range() -> 1 Note this also fixes a bug in the existing code for a number platforms. Those platforms that did: tlb_end_vma() -> if (!full_mm) flush_tlb_() tlb_flush -> if (full_mm) flush_tlb_mm() missed the case of shift_arg_pages(), which doesn't have @fullmm set, nor calls into tlb_vma(), but still frees page-tables and thus needs an invalidate. The new code handles this by detecting a non-empty range, and either issuing the matching range invalidate or a full invalidate, depending on the capabilities. No change in behavior intended. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Greentime Hu <green.hu@gmail.com> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Helge Deller <deller@gmx.de> Cc: Jonas Bonn <jonas@southpole.se> Cc: Ley Foon Tan <lftan@altera.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mark Salter <msalter@redhat.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Nick Piggin <npiggin@gmail.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Rik van Riel <riel@surriel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> 2018-09-04 18:04:07 +03:00			`/*`
			`* NIOS32 does have flush_tlb_range(), but it lacks a limit and fallback to`
			`* full mm invalidation. So use flush_tlb_mm() for everything.`
			`*/`
nios2: TLB handling This patch adds the TLB maintenance functions. Signed-off-by: Ley Foon Tan <lftan@altera.com> 2014-11-06 10:19:50 +03:00
			`#include <linux/pagemap.h>`
			`#include <asm-generic/tlb.h>`

			`#endif /* _ASM_NIOS2_TLB_H */`