1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
// 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);
|
