| #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 */ |