d99cf715a0
"extern inline" doesn't make sense. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
201 lines
5.2 KiB
C
201 lines
5.2 KiB
C
/*
|
|
* include/asm-xtensa/tlbflush.h
|
|
*
|
|
* 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 - 2005 Tensilica Inc.
|
|
*/
|
|
|
|
#ifndef _XTENSA_TLBFLUSH_H
|
|
#define _XTENSA_TLBFLUSH_H
|
|
|
|
#define DEBUG_TLB
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm/processor.h>
|
|
#include <linux/stringify.h>
|
|
|
|
/* TLB flushing:
|
|
*
|
|
* - flush_tlb_all() flushes all processes TLB entries
|
|
* - flush_tlb_mm(mm) flushes the specified mm context TLB entries
|
|
* - flush_tlb_page(mm, vmaddr) flushes a single page
|
|
* - flush_tlb_range(mm, start, end) flushes a range of pages
|
|
*/
|
|
|
|
extern void flush_tlb_all(void);
|
|
extern void flush_tlb_mm(struct mm_struct*);
|
|
extern void flush_tlb_page(struct vm_area_struct*,unsigned long);
|
|
extern void flush_tlb_range(struct vm_area_struct*,unsigned long,unsigned long);
|
|
|
|
#define flush_tlb_kernel_range(start,end) flush_tlb_all()
|
|
|
|
|
|
/* This is calld in munmap when we have freed up some page-table pages.
|
|
* We don't need to do anything here, there's nothing special about our
|
|
* page-table pages.
|
|
*/
|
|
|
|
static inline void flush_tlb_pgtables(struct mm_struct *mm,
|
|
unsigned long start, unsigned long end)
|
|
{
|
|
}
|
|
|
|
/* TLB operations. */
|
|
|
|
#define ITLB_WAYS_LOG2 XCHAL_ITLB_WAY_BITS
|
|
#define DTLB_WAYS_LOG2 XCHAL_DTLB_WAY_BITS
|
|
#define ITLB_PROBE_SUCCESS (1 << ITLB_WAYS_LOG2)
|
|
#define DTLB_PROBE_SUCCESS (1 << DTLB_WAYS_LOG2)
|
|
|
|
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, "__stringify(ITLBCFG)"\n\t" "isync\n\t"
|
|
: : "a" (val));
|
|
}
|
|
|
|
static inline void set_dtlbcfg_register (unsigned long val)
|
|
{
|
|
__asm__ __volatile__("wsr %0, "__stringify(DTLBCFG)"; dsync\n\t"
|
|
: : "a" (val));
|
|
}
|
|
|
|
static inline void set_ptevaddr_register (unsigned long val)
|
|
{
|
|
__asm__ __volatile__(" wsr %0, "__stringify(PTEVADDR)"; isync\n"
|
|
: : "a" (val));
|
|
}
|
|
|
|
static inline unsigned long read_ptevaddr_register (void)
|
|
{
|
|
unsigned long tmp;
|
|
__asm__ __volatile__("rsr %0, "__stringify(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_PGTABLE);
|
|
}
|
|
|
|
static inline void invalidate_itlb_mapping (unsigned address)
|
|
{
|
|
unsigned long tlb_entry;
|
|
while ((tlb_entry = itlb_probe (address)) & ITLB_PROBE_SUCCESS)
|
|
invalidate_itlb_entry (tlb_entry);
|
|
}
|
|
|
|
static inline void invalidate_dtlb_mapping (unsigned address)
|
|
{
|
|
unsigned long tlb_entry;
|
|
while ((tlb_entry = dtlb_probe (address)) & DTLB_PROBE_SUCCESS)
|
|
invalidate_dtlb_entry (tlb_entry);
|
|
}
|
|
|
|
#define check_pgt_cache() do { } while (0)
|
|
|
|
|
|
#ifdef DEBUG_TLB
|
|
|
|
/* 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 /* DEBUG_TLB */
|
|
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _XTENSA_PGALLOC_H */
|