tlbflush.h

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#ifndef _ASM_M32R_TLBFLUSH_H
#define _ASM_M32R_TLBFLUSH_H

#include <asm/m32r.h>

/*
 * TLB flushing:
 *
 *  - flush_tlb() flushes the current mm struct TLBs
 *  - flush_tlb_all() flushes all processes TLBs
 *  - flush_tlb_mm(mm) flushes the specified mm context TLB's
 *  - flush_tlb_page(vma, vmaddr) flushes one page
 *  - flush_tlb_range(vma, start, end) flushes a range of pages
 *  - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
 */

extern void local_flush_tlb_all(void);
extern void local_flush_tlb_mm(struct mm_struct *);
extern void local_flush_tlb_page(struct vm_area_struct *, unsigned long);
extern void local_flush_tlb_range(struct vm_area_struct *, unsigned long,
    unsigned long);

#ifndef CONFIG_SMP
#ifdef CONFIG_MMU
#define flush_tlb_all()         local_flush_tlb_all()
#define flush_tlb_mm(mm)        local_flush_tlb_mm(mm)
#define flush_tlb_page(vma, page)   local_flush_tlb_page(vma, page)
#define flush_tlb_range(vma, start, end)    \
    local_flush_tlb_range(vma, start, end)
#define flush_tlb_kernel_range(start, end)  local_flush_tlb_all()
#else   /* CONFIG_MMU */
#define flush_tlb_all()         do { } while (0)
#define flush_tlb_mm(mm)        do { } while (0)
#define flush_tlb_page(vma, vmaddr) do { } while (0)
#define flush_tlb_range(vma, start, end)    do { } while (0)
#endif  /* CONFIG_MMU */
#else   /* CONFIG_SMP */
extern void smp_flush_tlb_all(void);
extern void smp_flush_tlb_mm(struct mm_struct *);
extern void smp_flush_tlb_page(struct vm_area_struct *, unsigned long);
extern void smp_flush_tlb_range(struct vm_area_struct *, unsigned long,
    unsigned long);

#define flush_tlb_all()         smp_flush_tlb_all()
#define flush_tlb_mm(mm)        smp_flush_tlb_mm(mm)
#define flush_tlb_page(vma, page)   smp_flush_tlb_page(vma, page)
#define flush_tlb_range(vma, start, end)    \
    smp_flush_tlb_range(vma, start, end)
#define flush_tlb_kernel_range(start, end)  smp_flush_tlb_all()
#endif  /* CONFIG_SMP */

static __inline__ void __flush_tlb_page(unsigned long page)
{
    unsigned int tmpreg0, tmpreg1, tmpreg2;

    __asm__ __volatile__ (
        "seth   %0, #high(%4)   \n\t"
        "st %3, @(%5, %0)   \n\t"
        "ldi    %1, #1      \n\t"
        "st %1, @(%6, %0)   \n\t"
        "add3   %1, %0, %7  \n\t"
        ".fillinsn      \n"
        "1:         \n\t"
        "ld %2, @(%6, %0)   \n\t"
        "bnez   %2, 1b      \n\t"
        "ld %0, @%1+    \n\t"
        "ld %1, @%1     \n\t"
        "st %2, @+%0    \n\t"
        "st %2, @+%1    \n\t"
        : "=&r" (tmpreg0), "=&r" (tmpreg1), "=&r" (tmpreg2)
        : "r" (page), "i" (MMU_REG_BASE), "i" (MSVA_offset),
        "i" (MTOP_offset), "i" (MIDXI_offset)
        : "memory"
    );
}

static __inline__ void __flush_tlb_all(void)
{
    unsigned int tmpreg0, tmpreg1;

    __asm__ __volatile__ (
        "seth   %0, #high(%2)       \n\t"
        "or3    %0, %0, #low(%2)    \n\t"
        "ldi    %1, #0xc        \n\t"
        "st %1, @%0         \n\t"
        ".fillinsn          \n"
        "1:             \n\t"
        "ld %1, @%0         \n\t"
        "bnez   %1, 1b          \n\t"
        : "=&r" (tmpreg0), "=&r" (tmpreg1)
        : "i" (MTOP) : "memory"
    );
}

extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);

#endif  /* _ASM_M32R_TLBFLUSH_H */