[linux-2.6-block.git] / arch / powerpc / include / asm / tlb.h

/*
 *	TLB shootdown specifics for powerpc
 *
 * Copyright (C) 2002 Anton Blanchard, IBM Corp.
 * Copyright (C) 2002 Paul Mackerras, IBM Corp.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */
#ifndef _ASM_POWERPC_TLB_H
#define _ASM_POWERPC_TLB_H
#ifdef __KERNEL__

#ifndef __powerpc64__
#include <asm/pgtable.h>
#endif
#include <asm/pgalloc.h>
#ifndef __powerpc64__
#include <asm/page.h>
#include <asm/mmu.h>
#endif

#include <linux/pagemap.h>

#define tlb_start_vma(tlb, vma)	do { } while (0)
#define tlb_end_vma(tlb, vma)	do { } while (0)
#define __tlb_remove_tlb_entry	__tlb_remove_tlb_entry
#define tlb_remove_check_page_size_change tlb_remove_check_page_size_change

extern void tlb_flush(struct mmu_gather *tlb);

/* Get the generic bits... */
#include <asm-generic/tlb.h>

extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
			     unsigned long address);

static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
					  unsigned long address)
{
#ifdef CONFIG_PPC_BOOK3S_32
	if (pte_val(*ptep) & _PAGE_HASHPTE)
		flush_hash_entry(tlb->mm, ptep, address);
#endif
}

static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb,
						     unsigned int page_size)
{
	if (!tlb->page_size)
		tlb->page_size = page_size;
	else if (tlb->page_size != page_size) {
		if (!tlb->fullmm)
			tlb_flush_mmu(tlb);
		/*
		 * update the page size after flush for the new
		 * mmu_gather.
		 */
		tlb->page_size = page_size;
	}
}

#ifdef CONFIG_SMP
static inline int mm_is_core_local(struct mm_struct *mm)
{
	return cpumask_subset(mm_cpumask(mm),
			      topology_sibling_cpumask(smp_processor_id()));
}

#ifdef CONFIG_PPC_BOOK3S_64
static inline int mm_is_thread_local(struct mm_struct *mm)
{
	if (atomic_read(&mm->context.active_cpus) > 1)
		return false;
	return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
}
static inline void mm_reset_thread_local(struct mm_struct *mm)
{
	WARN_ON(atomic_read(&mm->context.copros) > 0);
	/*
	 * It's possible for mm_access to take a reference on mm_users to
	 * access the remote mm from another thread, but it's not allowed
	 * to set mm_cpumask, so mm_users may be > 1 here.
	 */
	WARN_ON(current->mm != mm);
	atomic_set(&mm->context.active_cpus, 1);
	cpumask_clear(mm_cpumask(mm));
	cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
}
#else /* CONFIG_PPC_BOOK3S_64 */
static inline int mm_is_thread_local(struct mm_struct *mm)
{
	return cpumask_equal(mm_cpumask(mm),
			      cpumask_of(smp_processor_id()));
}
#endif /* !CONFIG_PPC_BOOK3S_64 */

#else /* CONFIG_SMP */
static inline int mm_is_core_local(struct mm_struct *mm)
{
	return 1;
}

static inline int mm_is_thread_local(struct mm_struct *mm)
{
	return 1;
}
#endif

#endif /* __KERNEL__ */
#endif /* __ASM_POWERPC_TLB_H */
Commit	Line	Data
1da177e4	1	/*
9a0f78f6	2	* TLB shootdown specifics for powerpc
1da177e4	3	*
9a0f78f6	4	* Copyright (C) 2002 Anton Blanchard, IBM Corp.
1da177e4 LT	5	* Copyright (C) 2002 Paul Mackerras, IBM Corp.
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License
	9	* as published by the Free Software Foundation; either version
	10	* 2 of the License, or (at your option) any later version.
	11	*/
9a0f78f6 SR	12	#ifndef _ASM_POWERPC_TLB_H
9a0f78f6 SR	13	#define _ASM_POWERPC_TLB_H
88ced031	14	#ifdef __KERNEL__
1da177e4	15
9a0f78f6	16	#ifndef __powerpc64__
1da177e4	17	#include <asm/pgtable.h>
9a0f78f6	18	#endif
1da177e4	19	#include <asm/pgalloc.h>
9a0f78f6	20	#ifndef __powerpc64__
1da177e4 LT	21	#include <asm/page.h>
1da177e4 LT	22	#include <asm/mmu.h>
9a0f78f6	23	#endif
1da177e4	24
d4243c17 MD	25	#include <linux/pagemap.h>
d4243c17 MD	26
9a0f78f6 SR	27	#define tlb_start_vma(tlb, vma) do { } while (0)
9a0f78f6 SR	28	#define tlb_end_vma(tlb, vma) do { } while (0)
fb7332a9	29	#define __tlb_remove_tlb_entry __tlb_remove_tlb_entry
07e32661	30	#define tlb_remove_check_page_size_change tlb_remove_check_page_size_change
9a0f78f6	31
1da177e4 LT	32	extern void tlb_flush(struct mmu_gather *tlb);
	33
	34	/* Get the generic bits... */
	35	#include <asm-generic/tlb.h>
	36
1da177e4 LT	37	extern void flush_hash_entry(struct mm_struct mm, pte_t ptep,
	38	unsigned long address);
	39
	40	static inline void __tlb_remove_tlb_entry(struct mmu_gather tlb, pte_t ptep,
c7cc58a1	41	unsigned long address)
1da177e4	42	{
68289ae9	43	#ifdef CONFIG_PPC_BOOK3S_32
1da177e4 LT	44	if (pte_val(*ptep) & _PAGE_HASHPTE)
1da177e4 LT	45	flush_hash_entry(tlb->mm, ptep, address);
c7cc58a1	46	#endif
1da177e4 LT	47	}
1da177e4 LT	48
07e32661 AK	49	static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb,
	50	unsigned int page_size)
	51	{
	52	if (!tlb->page_size)
	53	tlb->page_size = page_size;
	54	else if (tlb->page_size != page_size) {
0b6aa1a2 AK	55	if (!tlb->fullmm)
0b6aa1a2 AK	56	tlb_flush_mmu(tlb);
07e32661 AK	57	/*
	58	* update the page size after flush for the new
	59	* mmu_gather.
	60	*/
	61	tlb->page_size = page_size;
	62	}
	63	}
	64
9d4dab11 AK	65	#ifdef CONFIG_SMP
	66	static inline int mm_is_core_local(struct mm_struct *mm)
	67	{
	68	return cpumask_subset(mm_cpumask(mm),
	69	topology_sibling_cpumask(smp_processor_id()));
	70	}
bd77c449	71
a619e59c BH	72	#ifdef CONFIG_PPC_BOOK3S_64
	73	static inline int mm_is_thread_local(struct mm_struct *mm)
	74	{
	75	if (atomic_read(&mm->context.active_cpus) > 1)
	76	return false;
	77	return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
	78	}
0cef77c7 NP	79	static inline void mm_reset_thread_local(struct mm_struct *mm)
	80	{
	81	WARN_ON(atomic_read(&mm->context.copros) > 0);
	82	/*
	83	* It's possible for mm_access to take a reference on mm_users to
	84	* access the remote mm from another thread, but it's not allowed
	85	* to set mm_cpumask, so mm_users may be > 1 here.
	86	*/
	87	WARN_ON(current->mm != mm);
	88	atomic_set(&mm->context.active_cpus, 1);
	89	cpumask_clear(mm_cpumask(mm));
	90	cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
	91	}
a619e59c	92	#else /* CONFIG_PPC_BOOK3S_64 */
bd77c449 AK	93	static inline int mm_is_thread_local(struct mm_struct *mm)
	94	{
	95	return cpumask_equal(mm_cpumask(mm),
	96	cpumask_of(smp_processor_id()));
	97	}
a619e59c	98	#endif /* !CONFIG_PPC_BOOK3S_64 */
bd77c449	99
a619e59c	100	#else /* CONFIG_SMP */
9d4dab11 AK	101	static inline int mm_is_core_local(struct mm_struct *mm)
	102	{
	103	return 1;
	104	}
bd77c449 AK	105
	106	static inline int mm_is_thread_local(struct mm_struct *mm)
	107	{
	108	return 1;
	109	}
9d4dab11 AK	110	#endif
9d4dab11 AK	111
88ced031	112	#endif /* __KERNEL__ */
9a0f78f6	113	#endif /* __ASM_POWERPC_TLB_H */