diff options
author | Paul Mackerras <paulus@samba.org> | 2005-11-19 20:17:32 +1100 |
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committer | Paul Mackerras <paulus@samba.org> | 2005-11-19 20:17:32 +1100 |
commit | 047ea7846565917c4a666635fa1fa4b5c587cd55 (patch) | |
tree | 409c8f6ddd1f145fb364a8d6f813febd0c94d06b /include/asm-powerpc/mmu_context.h | |
parent | 800fc3eeb0eed3bf98d621c0da24d68cabcf6526 (diff) | |
download | kernel_samsung_smdk4412-047ea7846565917c4a666635fa1fa4b5c587cd55.zip kernel_samsung_smdk4412-047ea7846565917c4a666635fa1fa4b5c587cd55.tar.gz kernel_samsung_smdk4412-047ea7846565917c4a666635fa1fa4b5c587cd55.tar.bz2 |
powerpc: Trivially merge several headers from asm-ppc64 to asm-powerpc
For these, I have just done the lame-o merge where the file ends up
looking like:
#ifndef CONFIG_PPC64
#include <asm-ppc/foo.h>
#else
... contents from asm-ppc64/foo.h
#endif
so nothing has changed, really, except that we reduce include/asm-ppc64
a bit more.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc/mmu_context.h')
-rw-r--r-- | include/asm-powerpc/mmu_context.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/include/asm-powerpc/mmu_context.h b/include/asm-powerpc/mmu_context.h new file mode 100644 index 0000000..ea6798c --- /dev/null +++ b/include/asm-powerpc/mmu_context.h @@ -0,0 +1,89 @@ +#ifndef __ASM_POWERPC_MMU_CONTEXT_H +#define __ASM_POWERPC_MMU_CONTEXT_H + +#ifndef CONFIG_PPC64 +#include <asm-ppc/mmu_context.h> +#else + +#include <linux/kernel.h> +#include <linux/mm.h> +#include <asm/mmu.h> +#include <asm/cputable.h> + +/* + * Copyright (C) 2001 PPC 64 Team, IBM Corp + * + * 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. + */ + +/* + * Getting into a kernel thread, there is no valid user segment, mark + * paca->pgdir NULL so that SLB miss on user addresses will fault + */ +static inline void enter_lazy_tlb(struct mm_struct *mm, + struct task_struct *tsk) +{ +#ifdef CONFIG_PPC_64K_PAGES + get_paca()->pgdir = NULL; +#endif /* CONFIG_PPC_64K_PAGES */ +} + +#define NO_CONTEXT 0 +#define MAX_CONTEXT (0x100000-1) + +extern int init_new_context(struct task_struct *tsk, struct mm_struct *mm); +extern void destroy_context(struct mm_struct *mm); + +extern void switch_stab(struct task_struct *tsk, struct mm_struct *mm); +extern void switch_slb(struct task_struct *tsk, struct mm_struct *mm); + +/* + * switch_mm is the entry point called from the architecture independent + * code in kernel/sched.c + */ +static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, + struct task_struct *tsk) +{ + if (!cpu_isset(smp_processor_id(), next->cpu_vm_mask)) + cpu_set(smp_processor_id(), next->cpu_vm_mask); + + /* No need to flush userspace segments if the mm doesnt change */ +#ifdef CONFIG_PPC_64K_PAGES + if (prev == next && get_paca()->pgdir == next->pgd) + return; +#else + if (prev == next) + return; +#endif /* CONFIG_PPC_64K_PAGES */ + +#ifdef CONFIG_ALTIVEC + if (cpu_has_feature(CPU_FTR_ALTIVEC)) + asm volatile ("dssall"); +#endif /* CONFIG_ALTIVEC */ + + if (cpu_has_feature(CPU_FTR_SLB)) + switch_slb(tsk, next); + else + switch_stab(tsk, next); +} + +#define deactivate_mm(tsk,mm) do { } while (0) + +/* + * After we have set current->mm to a new value, this activates + * the context for the new mm so we see the new mappings. + */ +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); + local_irq_restore(flags); +} + +#endif /* CONFIG_PPC64 */ +#endif /* __ASM_POWERPC_MMU_CONTEXT_H */ |