/*
* This file is subject to the terms and conditions of the GNU General Public
* License . See the file " COPYING " in the main directory of this archive
* for more details .
*
* Copyright ( C ) 2001 - 2013 Tensilica Inc .
*/
#ifndef _XTENSA_TLBFLUSH_H
#define _XTENSA_TLBFLUSH_H
#include <linux/stringify.h>
#include <asm /processor.h>
#define DTLB_WAY_PGD 7
#define ITLB_ARF_WAYS 4
#define DTLB_ARF_WAYS 4
#define ITLB_HIT_BIT 3
#define DTLB_HIT_BIT 4
#ifndef __ASSEMBLER__
/* TLB flushing:
*
* - flush_tlb_all ( ) flushes all processes TLB entries
* - flush_tlb_mm ( mm ) flushes the specified mm context TLB entries
* - flush_tlb_page ( vma , page ) flushes a single page
* - flush_tlb_range ( vma , vmaddr , end ) flushes a range of pages
*/
void local_flush_tlb_all(void );
void local_flush_tlb_mm(struct mm_struct *mm);
void local_flush_tlb_page(struct vm_area_struct *vma,
unsigned long page);
void local_flush_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end);
void local_flush_tlb_kernel_range(unsigned long start, unsigned long end);
#ifdef CONFIG_SMP
void flush_tlb_all(void );
void flush_tlb_mm(struct mm_struct *);
void flush_tlb_page(struct vm_area_struct *, unsigned long );
void flush_tlb_range(struct vm_area_struct *, unsigned long ,
unsigned long );
void flush_tlb_kernel_range(unsigned long start, unsigned long end);
#else /* !CONFIG_SMP */
#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, vmaddr, end) local_flush_tlb_range(vma, vmaddr, \
end)
#define flush_tlb_kernel_range(start, end) local_flush_tlb_kernel_range(start, \
end)
#endif /* CONFIG_SMP */
/* TLB operations. */
static inline unsigned long itlb_probe(unsigned long addr)
{
unsigned long tmp;
__asm__ __volatile__("pitlb %0, %1\n\t" : "=a" (tmp) : "a" (addr));
return tmp;
}
static inline unsigned long dtlb_probe(unsigned long addr)
{
unsigned long tmp;
__asm__ __volatile__("pdtlb %0, %1\n\t" : "=a" (tmp) : "a" (addr));
return tmp;
}
static inline void invalidate_itlb_entry (unsigned long probe)
{
__asm__ __volatile__("iitlb %0; isync\n\t" : : "a" (probe));
}
static inline void invalidate_dtlb_entry (unsigned long probe)
{
__asm__ __volatile__("idtlb %0; dsync\n\t" : : "a" (probe));
}
/* Use the .._no_isync functions with caution. Generally, these are
* handy for bulk invalidates followed by a single ' isync ' . The
* caller must follow up with an ' isync ' , which can be relatively
* expensive on some Xtensa implementations .
*/
static inline void invalidate_itlb_entry_no_isync (unsigned entry)
{
/* Caller must follow up with 'isync'. */
__asm__ __volatile__ ("iitlb %0\n" : : "a" (entry) );
}
static inline void invalidate_dtlb_entry_no_isync (unsigned entry)
{
/* Caller must follow up with 'isync'. */
__asm__ __volatile__ ("idtlb %0\n" : : "a" (entry) );
}
static inline void set_itlbcfg_register (unsigned long val)
{
__asm__ __volatile__("wsr %0, itlbcfg\n\t" "isync\n\t"
: : "a" (val));
}
static inline void set_dtlbcfg_register (unsigned long val)
{
__asm__ __volatile__("wsr %0, dtlbcfg; dsync\n\t"
: : "a" (val));
}
static inline void set_ptevaddr_register (unsigned long val)
{
__asm__ __volatile__(" wsr %0, ptevaddr; isync\n"
: : "a" (val));
}
static inline unsigned long read_ptevaddr_register (void )
{
unsigned long tmp;
__asm__ __volatile__("rsr %0, ptevaddr\n\t" : "=a" (tmp));
return tmp;
}
static inline void write_dtlb_entry (pte_t entry, int way)
{
__asm__ __volatile__("wdtlb %1, %0; dsync\n\t"
: : "r" (way), "r" (entry) );
}
static inline void write_itlb_entry (pte_t entry, int way)
{
__asm__ __volatile__("witlb %1, %0; isync\n\t"
: : "r" (way), "r" (entry) );
}
static inline void invalidate_page_directory (void )
{
invalidate_dtlb_entry (DTLB_WAY_PGD);
invalidate_dtlb_entry (DTLB_WAY_PGD+1 );
invalidate_dtlb_entry (DTLB_WAY_PGD+2 );
}
static inline void invalidate_itlb_mapping (unsigned address)
{
unsigned long tlb_entry;
if (((tlb_entry = itlb_probe(address)) & (1 << ITLB_HIT_BIT)) != 0 )
invalidate_itlb_entry(tlb_entry);
}
static inline void invalidate_dtlb_mapping (unsigned address)
{
unsigned long tlb_entry;
if (((tlb_entry = dtlb_probe(address)) & (1 << DTLB_HIT_BIT)) != 0 )
invalidate_dtlb_entry(tlb_entry);
}
/*
* DO NOT USE THESE FUNCTIONS . These instructions aren ' t part of the Xtensa
* ISA and exist only for test purposes . .
* You may find it helpful for MMU debugging , however .
*
* ' at ' is the unmodified input register
* ' as ' is the output register , as follows ( specific to the Linux config ) :
*
* as [ 31 . . 12 ] contain the virtual address
* as [ 11 . . 08 ] are meaningless
* as [ 07 . . 00 ] contain the asid
*/
static inline unsigned long read_dtlb_virtual (int way)
{
unsigned long tmp;
__asm__ __volatile__("rdtlb0 %0, %1\n\t" : "=a" (tmp), "+a" (way));
return tmp;
}
static inline unsigned long read_dtlb_translation (int way)
{
unsigned long tmp;
__asm__ __volatile__("rdtlb1 %0, %1\n\t" : "=a" (tmp), "+a" (way));
return tmp;
}
static inline unsigned long read_itlb_virtual (int way)
{
unsigned long tmp;
__asm__ __volatile__("ritlb0 %0, %1\n\t" : "=a" (tmp), "+a" (way));
return tmp;
}
static inline unsigned long read_itlb_translation (int way)
{
unsigned long tmp;
__asm__ __volatile__("ritlb1 %0, %1\n\t" : "=a" (tmp), "+a" (way));
return tmp;
}
#endif /* __ASSEMBLER__ */
#endif /* _XTENSA_TLBFLUSH_H */
Messung V0.5 in Prozent C=94 H=94 G=93
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-09-28)
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