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Diffstat (limited to 'include/asm-blackfin/mmu_context.h')
-rw-r--r--include/asm-blackfin/mmu_context.h181
1 files changed, 0 insertions, 181 deletions
diff --git a/include/asm-blackfin/mmu_context.h b/include/asm-blackfin/mmu_context.h
deleted file mode 100644
index f55ec3c23a9..00000000000
--- a/include/asm-blackfin/mmu_context.h
+++ /dev/null
@@ -1,181 +0,0 @@
-/*
- * File: include/asm-blackfin/mmu_context.h
- * Based on:
- * Author:
- *
- * Created:
- * Description:
- *
- * Modified:
- * Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs: Enter bugs at http://blackfin.uclinux.org/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef __BLACKFIN_MMU_CONTEXT_H__
-#define __BLACKFIN_MMU_CONTEXT_H__
-
-#include <linux/gfp.h>
-#include <linux/sched.h>
-#include <asm/setup.h>
-#include <asm/page.h>
-#include <asm/pgalloc.h>
-#include <asm/cplbinit.h>
-
-extern void *current_l1_stack_save;
-extern int nr_l1stack_tasks;
-extern void *l1_stack_base;
-extern unsigned long l1_stack_len;
-
-extern int l1sram_free(const void*);
-extern void *l1sram_alloc_max(void*);
-
-static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
-{
-}
-
-/* Called when creating a new context during fork() or execve(). */
-static inline int
-init_new_context(struct task_struct *tsk, struct mm_struct *mm)
-{
-#ifdef CONFIG_MPU
- unsigned long p = __get_free_pages(GFP_KERNEL, page_mask_order);
- mm->context.page_rwx_mask = (unsigned long *)p;
- memset(mm->context.page_rwx_mask, 0,
- page_mask_nelts * 3 * sizeof(long));
-#endif
- return 0;
-}
-
-static inline void free_l1stack(void)
-{
- nr_l1stack_tasks--;
- if (nr_l1stack_tasks == 0)
- l1sram_free(l1_stack_base);
-}
-static inline void destroy_context(struct mm_struct *mm)
-{
- struct sram_list_struct *tmp;
-
- if (current_l1_stack_save == mm->context.l1_stack_save)
- current_l1_stack_save = NULL;
- if (mm->context.l1_stack_save)
- free_l1stack();
-
- while ((tmp = mm->context.sram_list)) {
- mm->context.sram_list = tmp->next;
- sram_free(tmp->addr);
- kfree(tmp);
- }
-#ifdef CONFIG_MPU
- if (current_rwx_mask == mm->context.page_rwx_mask)
- current_rwx_mask = NULL;
- free_pages((unsigned long)mm->context.page_rwx_mask, page_mask_order);
-#endif
-}
-
-static inline unsigned long
-alloc_l1stack(unsigned long length, unsigned long *stack_base)
-{
- if (nr_l1stack_tasks == 0) {
- l1_stack_base = l1sram_alloc_max(&l1_stack_len);
- if (!l1_stack_base)
- return 0;
- }
-
- if (l1_stack_len < length) {
- if (nr_l1stack_tasks == 0)
- l1sram_free(l1_stack_base);
- return 0;
- }
- *stack_base = (unsigned long)l1_stack_base;
- nr_l1stack_tasks++;
- return l1_stack_len;
-}
-
-static inline int
-activate_l1stack(struct mm_struct *mm, unsigned long sp_base)
-{
- if (current_l1_stack_save)
- memcpy(current_l1_stack_save, l1_stack_base, l1_stack_len);
- mm->context.l1_stack_save = current_l1_stack_save = (void*)sp_base;
- memcpy(l1_stack_base, current_l1_stack_save, l1_stack_len);
- return 1;
-}
-
-#define deactivate_mm(tsk,mm) do { } while (0)
-
-#define activate_mm(prev, next) switch_mm(prev, next, NULL)
-
-static inline void switch_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm,
- struct task_struct *tsk)
-{
- if (prev_mm == next_mm)
- return;
-#ifdef CONFIG_MPU
- if (prev_mm->context.page_rwx_mask == current_rwx_mask) {
- flush_switched_cplbs();
- set_mask_dcplbs(next_mm->context.page_rwx_mask);
- }
-#endif
-
- /* L1 stack switching. */
- if (!next_mm->context.l1_stack_save)
- return;
- if (next_mm->context.l1_stack_save == current_l1_stack_save)
- return;
- if (current_l1_stack_save) {
- memcpy(current_l1_stack_save, l1_stack_base, l1_stack_len);
- }
- current_l1_stack_save = next_mm->context.l1_stack_save;
- memcpy(l1_stack_base, current_l1_stack_save, l1_stack_len);
-}
-
-#ifdef CONFIG_MPU
-static inline void protect_page(struct mm_struct *mm, unsigned long addr,
- unsigned long flags)
-{
- unsigned long *mask = mm->context.page_rwx_mask;
- unsigned long page = addr >> 12;
- unsigned long idx = page >> 5;
- unsigned long bit = 1 << (page & 31);
-
- if (flags & VM_MAYREAD)
- mask[idx] |= bit;
- else
- mask[idx] &= ~bit;
- mask += page_mask_nelts;
- if (flags & VM_MAYWRITE)
- mask[idx] |= bit;
- else
- mask[idx] &= ~bit;
- mask += page_mask_nelts;
- if (flags & VM_MAYEXEC)
- mask[idx] |= bit;
- else
- mask[idx] &= ~bit;
-}
-
-static inline void update_protections(struct mm_struct *mm)
-{
- flush_switched_cplbs();
- set_mask_dcplbs(mm->context.page_rwx_mask);
-}
-#endif
-
-#endif