forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
69 lines
1.9 KiB
69 lines
1.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
#ifndef _PARISC_TLBFLUSH_H |
|
#define _PARISC_TLBFLUSH_H |
|
|
|
/* TLB flushing routines.... */ |
|
|
|
#include <linux/mm.h> |
|
#include <linux/sched.h> |
|
#include <asm/mmu_context.h> |
|
|
|
extern void flush_tlb_all(void); |
|
extern void flush_tlb_all_local(void *); |
|
|
|
#define smp_flush_tlb_all() flush_tlb_all() |
|
|
|
int __flush_tlb_range(unsigned long sid, |
|
unsigned long start, unsigned long end); |
|
|
|
#define flush_tlb_range(vma, start, end) \ |
|
__flush_tlb_range((vma)->vm_mm->context, start, end) |
|
|
|
#define flush_tlb_kernel_range(start, end) \ |
|
__flush_tlb_range(0, start, end) |
|
|
|
/* |
|
* flush_tlb_mm() |
|
* |
|
* The code to switch to a new context is NOT valid for processes |
|
* which play with the space id's. Thus, we have to preserve the |
|
* space and just flush the entire tlb. However, the compilers, |
|
* dynamic linker, etc, do not manipulate space id's, so there |
|
* could be a significant performance benefit in switching contexts |
|
* and not flushing the whole tlb. |
|
*/ |
|
|
|
static inline void flush_tlb_mm(struct mm_struct *mm) |
|
{ |
|
BUG_ON(mm == &init_mm); /* Should never happen */ |
|
|
|
#if 1 || defined(CONFIG_SMP) |
|
/* Except for very small threads, flushing the whole TLB is |
|
* faster than using __flush_tlb_range. The pdtlb and pitlb |
|
* instructions are very slow because of the TLB broadcast. |
|
* It might be faster to do local range flushes on all CPUs |
|
* on PA 2.0 systems. |
|
*/ |
|
flush_tlb_all(); |
|
#else |
|
/* FIXME: currently broken, causing space id and protection ids |
|
* to go out of sync, resulting in faults on userspace accesses. |
|
* This approach needs further investigation since running many |
|
* small applications (e.g., GCC testsuite) is faster on HP-UX. |
|
*/ |
|
if (mm) { |
|
if (mm->context != 0) |
|
free_sid(mm->context); |
|
mm->context = alloc_sid(); |
|
if (mm == current->active_mm) |
|
load_context(mm->context); |
|
} |
|
#endif |
|
} |
|
|
|
static inline void flush_tlb_page(struct vm_area_struct *vma, |
|
unsigned long addr) |
|
{ |
|
purge_tlb_entries(vma->vm_mm, addr); |
|
} |
|
#endif
|
|
|