root/include/asm-m32r/tlbflush.h

INCLUDED FROM

DEFINITIONS

1. __flush_tlb_page
2. __flush_tlb_all

#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 */