mirror of https://gitee.com/openkylin/linux.git
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
|
||
|
|
|
||
|
|
#include <linux/bitops.h>
|
||
|
|
#include <linux/sched.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
#include <linux/mm.h>
|
||
|
|
|
||
|
|
#include <asm/asid.h>
|
||
|
|
#include <asm/mmu_context.h>
|
||
|
|
#include <asm/smp.h>
|
||
|
|
#include <asm/tlbflush.h>
|
||
|
|
|
||
|
|
static DEFINE_PER_CPU(atomic64_t, active_asids);
|
||
|
|
static DEFINE_PER_CPU(u64, reserved_asids);
|
||
|
|
|
||
|
|
struct asid_info asid_info;
|
||
|
|
|
||
|
|
void check_and_switch_context(struct mm_struct *mm, unsigned int cpu)
|
||
|
|
{
|
||
|
|
asid_check_context(&asid_info, &mm->context.asid, cpu, mm);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void asid_flush_cpu_ctxt(void)
|
||
|
|
{
|
||
|
|
local_tlb_invalid_all();
|
||
|
|
}
|
||
|
|
|
||
|
|
static int asids_init(void)
|
||
|
|
{
|
||
|
|
BUG_ON(((1 << CONFIG_CPU_ASID_BITS) - 1) <= num_possible_cpus());
|
||
|
|
|
||
|
|
if (asid_allocator_init(&asid_info, CONFIG_CPU_ASID_BITS, 1,
|
||
|
|
asid_flush_cpu_ctxt))
|
||
|
|
panic("Unable to initialize ASID allocator for %lu ASIDs\n",
|
||
|
|
NUM_ASIDS(&asid_info));
|
||
|
|
|
||
|
|
asid_info.active = &active_asids;
|
||
|
|
asid_info.reserved = &reserved_asids;
|
||
|
|
|
||
|
|
pr_info("ASID allocator initialised with %lu entries\n",
|
||
|
|
NUM_CTXT_ASIDS(&asid_info));
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
early_initcall(asids_init);
|