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| 3 |
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| 4 | #include <linux/bitops.h>
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| 5 | #include <linux/sched.h>
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| 6 | #include <linux/slab.h>
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| 7 | #include <linux/mm.h>
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| 8 |
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| 9 | #include <asm/asid.h>
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| 10 | #include <asm/mmu_context.h>
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| 11 | #include <asm/smp.h>
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| 12 | #include <asm/tlbflush.h>
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| 13 |
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| 14 | static DEFINE_PER_CPU(atomic64_t, active_asids);
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| 15 | static DEFINE_PER_CPU(u64, reserved_asids);
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| 16 |
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| 17 | struct asid_info asid_info;
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| 18 |
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| 19 | void check_and_switch_context(struct mm_struct *mm, unsigned int cpu)
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| 20 | {
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| 21 | asid_check_context(&asid_info, &mm->context.asid, cpu, mm);
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| 22 | }
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| 23 |
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| 24 | static void asid_flush_cpu_ctxt(void)
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| 25 | {
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| 26 | local_tlb_invalid_all();
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| 27 | }
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| 28 |
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| 29 | static int asids_init(void)
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| 30 | {
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| 31 | BUG_ON(((1 << CONFIG_CPU_ASID_BITS) - 1) <= num_possible_cpus());
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| 32 |
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| 33 | if (asid_allocator_init(&asid_info, CONFIG_CPU_ASID_BITS, 1,
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| 34 | asid_flush_cpu_ctxt))
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| 35 | panic("Unable to initialize ASID allocator for %lu ASIDs\n",
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| 36 | NUM_ASIDS(&asid_info));
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| 37 |
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| 38 | asid_info.active = &active_asids;
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| 39 | asid_info.reserved = &reserved_asids;
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| 40 |
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| 41 | pr_info("ASID allocator initialised with %lu entries\n",
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| 42 | NUM_CTXT_ASIDS(&asid_info));
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| 43 |
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| 44 | return 0;
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| 45 | }
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| 46 | early_initcall(asids_init);
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