android_kernel_motorola_sm6225/include/asm-sparc64/tlb.h
Benjamin Herrenschmidt 5e5419734c add mm argument to pte/pmd/pud/pgd_free
(with Martin Schwidefsky <schwidefsky@de.ibm.com>)

The pgd/pud/pmd/pte page table allocation functions get a mm_struct pointer as
first argument.  The free functions do not get the mm_struct argument.  This
is 1) asymmetrical and 2) to do mm related page table allocations the mm
argument is needed on the free function as well.

[kamalesh@linux.vnet.ibm.com: i386 fix]
[akpm@linux-foundation.org: coding-syle fixes]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05 09:44:18 -08:00

111 lines
2.5 KiB
C

#ifndef _SPARC64_TLB_H
#define _SPARC64_TLB_H
#include <linux/swap.h>
#include <linux/pagemap.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
#include <asm/mmu_context.h>
#define TLB_BATCH_NR 192
/*
* For UP we don't need to worry about TLB flush
* and page free order so much..
*/
#ifdef CONFIG_SMP
#define FREE_PTE_NR 506
#define tlb_fast_mode(bp) ((bp)->pages_nr == ~0U)
#else
#define FREE_PTE_NR 1
#define tlb_fast_mode(bp) 1
#endif
struct mmu_gather {
struct mm_struct *mm;
unsigned int pages_nr;
unsigned int need_flush;
unsigned int fullmm;
unsigned int tlb_nr;
unsigned long vaddrs[TLB_BATCH_NR];
struct page *pages[FREE_PTE_NR];
};
DECLARE_PER_CPU(struct mmu_gather, mmu_gathers);
#ifdef CONFIG_SMP
extern void smp_flush_tlb_pending(struct mm_struct *,
unsigned long, unsigned long *);
#endif
extern void __flush_tlb_pending(unsigned long, unsigned long, unsigned long *);
extern void flush_tlb_pending(void);
static inline struct mmu_gather *tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush)
{
struct mmu_gather *mp = &get_cpu_var(mmu_gathers);
BUG_ON(mp->tlb_nr);
mp->mm = mm;
mp->pages_nr = num_online_cpus() > 1 ? 0U : ~0U;
mp->fullmm = full_mm_flush;
return mp;
}
static inline void tlb_flush_mmu(struct mmu_gather *mp)
{
if (mp->need_flush) {
free_pages_and_swap_cache(mp->pages, mp->pages_nr);
mp->pages_nr = 0;
mp->need_flush = 0;
}
}
#ifdef CONFIG_SMP
extern void smp_flush_tlb_mm(struct mm_struct *mm);
#define do_flush_tlb_mm(mm) smp_flush_tlb_mm(mm)
#else
#define do_flush_tlb_mm(mm) __flush_tlb_mm(CTX_HWBITS(mm->context), SECONDARY_CONTEXT)
#endif
static inline void tlb_finish_mmu(struct mmu_gather *mp, unsigned long start, unsigned long end)
{
tlb_flush_mmu(mp);
if (mp->fullmm)
mp->fullmm = 0;
else
flush_tlb_pending();
/* keep the page table cache within bounds */
check_pgt_cache();
put_cpu_var(mmu_gathers);
}
static inline void tlb_remove_page(struct mmu_gather *mp, struct page *page)
{
if (tlb_fast_mode(mp)) {
free_page_and_swap_cache(page);
return;
}
mp->need_flush = 1;
mp->pages[mp->pages_nr++] = page;
if (mp->pages_nr >= FREE_PTE_NR)
tlb_flush_mmu(mp);
}
#define tlb_remove_tlb_entry(mp,ptep,addr) do { } while (0)
#define pte_free_tlb(mp, ptepage) pte_free((mp)->mm, ptepage)
#define pmd_free_tlb(mp, pmdp) pmd_free((mp)->mm, pmdp)
#define pud_free_tlb(tlb,pudp) __pud_free_tlb(tlb,pudp)
#define tlb_migrate_finish(mm) do { } while (0)
#define tlb_start_vma(tlb, vma) do { } while (0)
#define tlb_end_vma(tlb, vma) do { } while (0)
#endif /* _SPARC64_TLB_H */