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author | Richard Kuo <rkuo@codeaurora.org> | 2011-10-31 23:53:38 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-01 14:34:20 (GMT) |
commit | a7e79840991eac8da36f437c653ee4b8cfbdafdc (patch) | |
tree | a673266d06a67c7f4f32b0e048848e752b6bb441 /arch/hexagon/include/asm/mmu_context.h | |
parent | b7f3785fbb3df3307290d4c236ffaa7ad172b6ed (diff) | |
download | linux-fsl-qoriq-a7e79840991eac8da36f437c653ee4b8cfbdafdc.tar.xz |
Hexagon: Add page table header files & etc.
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
Signed-off-by: Linas Vepstas <linas@codeaurora.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/hexagon/include/asm/mmu_context.h')
-rw-r--r-- | arch/hexagon/include/asm/mmu_context.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/arch/hexagon/include/asm/mmu_context.h b/arch/hexagon/include/asm/mmu_context.h new file mode 100644 index 0000000..b4fe5a5 --- /dev/null +++ b/arch/hexagon/include/asm/mmu_context.h @@ -0,0 +1,100 @@ +/* + * MM context support for the Hexagon architecture + * + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#ifndef _ASM_MMU_CONTEXT_H +#define _ASM_MMU_CONTEXT_H + +#include <asm/setup.h> +#include <asm/page.h> +#include <asm/pgalloc.h> +#include <asm/mem-layout.h> + +static inline void destroy_context(struct mm_struct *mm) +{ +} + +/* + * VM port hides all TLB management, so "lazy TLB" isn't very + * meaningful. Even for ports to architectures with visble TLBs, + * this is almost invariably a null function. + */ +static inline void enter_lazy_tlb(struct mm_struct *mm, + struct task_struct *tsk) +{ +} + +/* + * Architecture-specific actions, if any, for memory map deactivation. + */ +static inline void deactivate_mm(struct task_struct *tsk, + struct mm_struct *mm) +{ +} + +/** + * init_new_context - initialize context related info for new mm_struct instance + * @tsk: pointer to a task struct + * @mm: pointer to a new mm struct + */ +static inline int init_new_context(struct task_struct *tsk, + struct mm_struct *mm) +{ + /* mm->context is set up by pgd_alloc */ + return 0; +} + +/* + * Switch active mm context + */ +static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, + struct task_struct *tsk) +{ + int l1; + + /* + * For virtual machine, we have to update system map if it's been + * touched. + */ + if (next->context.generation < prev->context.generation) { + for (l1 = MIN_KERNEL_SEG; l1 <= max_kernel_seg; l1++) + next->pgd[l1] = init_mm.pgd[l1]; + + next->context.generation = prev->context.generation; + } + + __vmnewmap((void *)next->context.ptbase); +} + +/* + * Activate new memory map for task + */ +static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next) +{ + unsigned long flags; + + local_irq_save(flags); + switch_mm(prev, next, current_thread_info()->task); + local_irq_restore(flags); +} + +/* Generic hooks for arch_dup_mmap and arch_exit_mmap */ +#include <asm-generic/mm_hooks.h> + +#endif |