mirror of
https://github.com/torvalds/linux.git
synced 2024-11-19 10:31:48 +00:00
03b505eae6
smp.c is becoming too large, so split out the TLB maintainence broadcasting into a separate smp_tlb.c file. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
140 lines
3.1 KiB
C
140 lines
3.1 KiB
C
/*
|
|
* linux/arch/arm/kernel/smp_tlb.c
|
|
*
|
|
* Copyright (C) 2002 ARM Limited, 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 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/preempt.h>
|
|
#include <linux/smp.h>
|
|
|
|
#include <asm/smp_plat.h>
|
|
#include <asm/tlbflush.h>
|
|
|
|
static void on_each_cpu_mask(void (*func)(void *), void *info, int wait,
|
|
const struct cpumask *mask)
|
|
{
|
|
preempt_disable();
|
|
|
|
smp_call_function_many(mask, func, info, wait);
|
|
if (cpumask_test_cpu(smp_processor_id(), mask))
|
|
func(info);
|
|
|
|
preempt_enable();
|
|
}
|
|
|
|
/**********************************************************************/
|
|
|
|
/*
|
|
* TLB operations
|
|
*/
|
|
struct tlb_args {
|
|
struct vm_area_struct *ta_vma;
|
|
unsigned long ta_start;
|
|
unsigned long ta_end;
|
|
};
|
|
|
|
static inline void ipi_flush_tlb_all(void *ignored)
|
|
{
|
|
local_flush_tlb_all();
|
|
}
|
|
|
|
static inline void ipi_flush_tlb_mm(void *arg)
|
|
{
|
|
struct mm_struct *mm = (struct mm_struct *)arg;
|
|
|
|
local_flush_tlb_mm(mm);
|
|
}
|
|
|
|
static inline void ipi_flush_tlb_page(void *arg)
|
|
{
|
|
struct tlb_args *ta = (struct tlb_args *)arg;
|
|
|
|
local_flush_tlb_page(ta->ta_vma, ta->ta_start);
|
|
}
|
|
|
|
static inline void ipi_flush_tlb_kernel_page(void *arg)
|
|
{
|
|
struct tlb_args *ta = (struct tlb_args *)arg;
|
|
|
|
local_flush_tlb_kernel_page(ta->ta_start);
|
|
}
|
|
|
|
static inline void ipi_flush_tlb_range(void *arg)
|
|
{
|
|
struct tlb_args *ta = (struct tlb_args *)arg;
|
|
|
|
local_flush_tlb_range(ta->ta_vma, ta->ta_start, ta->ta_end);
|
|
}
|
|
|
|
static inline void ipi_flush_tlb_kernel_range(void *arg)
|
|
{
|
|
struct tlb_args *ta = (struct tlb_args *)arg;
|
|
|
|
local_flush_tlb_kernel_range(ta->ta_start, ta->ta_end);
|
|
}
|
|
|
|
void flush_tlb_all(void)
|
|
{
|
|
if (tlb_ops_need_broadcast())
|
|
on_each_cpu(ipi_flush_tlb_all, NULL, 1);
|
|
else
|
|
local_flush_tlb_all();
|
|
}
|
|
|
|
void flush_tlb_mm(struct mm_struct *mm)
|
|
{
|
|
if (tlb_ops_need_broadcast())
|
|
on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, mm_cpumask(mm));
|
|
else
|
|
local_flush_tlb_mm(mm);
|
|
}
|
|
|
|
void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
|
|
{
|
|
if (tlb_ops_need_broadcast()) {
|
|
struct tlb_args ta;
|
|
ta.ta_vma = vma;
|
|
ta.ta_start = uaddr;
|
|
on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, mm_cpumask(vma->vm_mm));
|
|
} else
|
|
local_flush_tlb_page(vma, uaddr);
|
|
}
|
|
|
|
void flush_tlb_kernel_page(unsigned long kaddr)
|
|
{
|
|
if (tlb_ops_need_broadcast()) {
|
|
struct tlb_args ta;
|
|
ta.ta_start = kaddr;
|
|
on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1);
|
|
} else
|
|
local_flush_tlb_kernel_page(kaddr);
|
|
}
|
|
|
|
void flush_tlb_range(struct vm_area_struct *vma,
|
|
unsigned long start, unsigned long end)
|
|
{
|
|
if (tlb_ops_need_broadcast()) {
|
|
struct tlb_args ta;
|
|
ta.ta_vma = vma;
|
|
ta.ta_start = start;
|
|
ta.ta_end = end;
|
|
on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, mm_cpumask(vma->vm_mm));
|
|
} else
|
|
local_flush_tlb_range(vma, start, end);
|
|
}
|
|
|
|
void flush_tlb_kernel_range(unsigned long start, unsigned long end)
|
|
{
|
|
if (tlb_ops_need_broadcast()) {
|
|
struct tlb_args ta;
|
|
ta.ta_start = start;
|
|
ta.ta_end = end;
|
|
on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1);
|
|
} else
|
|
local_flush_tlb_kernel_range(start, end);
|
|
}
|
|
|