mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 07:34:06 +08:00
0a0fca9d83
Most of the stuff from kernel/sched.c was moved to kernel/sched/core.c long time back and the comments/Documentation never got updated. I figured it out when I was going through sched-domains.txt and so thought of fixing it globally. I haven't crossed check if the stuff that is referenced in sched/core.c by all these files is still present and hasn't changed as that wasn't the motive behind this patch. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/cdff76a265326ab8d71922a1db5be599f20aad45.1370329560.git.viresh.kumar@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
118 lines
3.3 KiB
C
118 lines
3.3 KiB
C
#ifndef __ASM_POWERPC_MMU_CONTEXT_H
|
|
#define __ASM_POWERPC_MMU_CONTEXT_H
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/spinlock.h>
|
|
#include <asm/mmu.h>
|
|
#include <asm/cputable.h>
|
|
#include <asm-generic/mm_hooks.h>
|
|
#include <asm/cputhreads.h>
|
|
|
|
/*
|
|
* Most if the context management is out of line
|
|
*/
|
|
extern int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
|
|
extern void destroy_context(struct mm_struct *mm);
|
|
|
|
extern void switch_mmu_context(struct mm_struct *prev, struct mm_struct *next);
|
|
extern void switch_stab(struct task_struct *tsk, struct mm_struct *mm);
|
|
extern void switch_slb(struct task_struct *tsk, struct mm_struct *mm);
|
|
extern void set_context(unsigned long id, pgd_t *pgd);
|
|
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
|
extern int __init_new_context(void);
|
|
extern void __destroy_context(int context_id);
|
|
static inline void mmu_context_init(void) { }
|
|
#else
|
|
extern unsigned long __init_new_context(void);
|
|
extern void __destroy_context(unsigned long context_id);
|
|
extern void mmu_context_init(void);
|
|
#endif
|
|
|
|
extern void switch_cop(struct mm_struct *next);
|
|
extern int use_cop(unsigned long acop, struct mm_struct *mm);
|
|
extern void drop_cop(unsigned long acop, struct mm_struct *mm);
|
|
|
|
/*
|
|
* switch_mm is the entry point called from the architecture independent
|
|
* code in kernel/sched/core.c
|
|
*/
|
|
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
|
|
struct task_struct *tsk)
|
|
{
|
|
/* Mark this context has been used on the new CPU */
|
|
cpumask_set_cpu(smp_processor_id(), mm_cpumask(next));
|
|
|
|
/* 32-bit keeps track of the current PGDIR in the thread struct */
|
|
#ifdef CONFIG_PPC32
|
|
tsk->thread.pgdir = next->pgd;
|
|
#endif /* CONFIG_PPC32 */
|
|
|
|
/* 64-bit Book3E keeps track of current PGD in the PACA */
|
|
#ifdef CONFIG_PPC_BOOK3E_64
|
|
get_paca()->pgd = next->pgd;
|
|
#endif
|
|
/* Nothing else to do if we aren't actually switching */
|
|
if (prev == next)
|
|
return;
|
|
|
|
#ifdef CONFIG_PPC_ICSWX
|
|
/* Switch coprocessor context only if prev or next uses a coprocessor */
|
|
if (prev->context.acop || next->context.acop)
|
|
switch_cop(next);
|
|
#endif /* CONFIG_PPC_ICSWX */
|
|
|
|
/* We must stop all altivec streams before changing the HW
|
|
* context
|
|
*/
|
|
#ifdef CONFIG_ALTIVEC
|
|
if (cpu_has_feature(CPU_FTR_ALTIVEC))
|
|
asm volatile ("dssall");
|
|
#endif /* CONFIG_ALTIVEC */
|
|
|
|
/* The actual HW switching method differs between the various
|
|
* sub architectures.
|
|
*/
|
|
#ifdef CONFIG_PPC_STD_MMU_64
|
|
if (mmu_has_feature(MMU_FTR_SLB))
|
|
switch_slb(tsk, next);
|
|
else
|
|
switch_stab(tsk, next);
|
|
#else
|
|
/* Out of line for now */
|
|
switch_mmu_context(prev, next);
|
|
#endif
|
|
|
|
}
|
|
|
|
#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);
|
|
}
|
|
|
|
/* We don't currently use enter_lazy_tlb() for anything */
|
|
static inline void enter_lazy_tlb(struct mm_struct *mm,
|
|
struct task_struct *tsk)
|
|
{
|
|
/* 64-bit Book3E keeps track of current PGD in the PACA */
|
|
#ifdef CONFIG_PPC_BOOK3E_64
|
|
get_paca()->pgd = NULL;
|
|
#endif
|
|
}
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* __ASM_POWERPC_MMU_CONTEXT_H */
|