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tlbflush.h

#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 */

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