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/
usr/
src/
linux-headers-3.0.0-14/
arch/
sh/
include/
asm/
- drwxr-xr-x
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Viewing file:  mmu_context_64.h (1.97 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
#ifndef __ASM_SH_MMU_CONTEXT_64_H
#define __ASM_SH_MMU_CONTEXT_64_H
/*
* sh64-specific mmu_context interface.
*
* Copyright (C) 2000, 2001 Paolo Alberelli
* Copyright (C) 2003 - 2007 Paul Mundt
*
* 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.
*/
#include <cpu/registers.h>
#include <asm/cacheflush.h>
#define SR_ASID_MASK 0xffffffffff00ffffULL
#define SR_ASID_SHIFT 16
/*
* Destroy context related info for an mm_struct that is about
* to be put to rest.
*/
static inline void destroy_context(struct mm_struct *mm)
{
/* Well, at least free TLB entries */
flush_tlb_mm(mm);
}
static inline unsigned long get_asid(void)
{
unsigned long long sr;
asm volatile ("getcon " __SR ", %0\n\t"
: "=r" (sr));
sr = (sr >> SR_ASID_SHIFT) & MMU_CONTEXT_ASID_MASK;
return (unsigned long) sr;
}
/* Set ASID into SR */
static inline void set_asid(unsigned long asid)
{
unsigned long long sr, pc;
asm volatile ("getcon " __SR ", %0" : "=r" (sr));
sr = (sr & SR_ASID_MASK) | (asid << SR_ASID_SHIFT);
/*
* It is possible that this function may be inlined and so to avoid
* the assembler reporting duplicate symbols we make use of the
* gas trick of generating symbols using numerics and forward
* reference.
*/
asm volatile ("movi 1, %1\n\t"
"shlli %1, 28, %1\n\t"
"or %0, %1, %1\n\t"
"putcon %1, " __SR "\n\t"
"putcon %0, " __SSR "\n\t"
"movi 1f, %1\n\t"
"ori %1, 1 , %1\n\t"
"putcon %1, " __SPC "\n\t"
"rte\n"
"1:\n\t"
: "=r" (sr), "=r" (pc) : "0" (sr));
}
/* arch/sh/kernel/cpu/sh5/entry.S */
extern unsigned long switch_and_save_asid(unsigned long new_asid);
/* No spare register to twiddle, so use a software cache */
extern pgd_t *mmu_pdtp_cache;
#define set_TTB(pgd) (mmu_pdtp_cache = (pgd))
#define get_TTB() (mmu_pdtp_cache)
#endif /* __ASM_SH_MMU_CONTEXT_64_H */
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