smp.c (10034aabca9032246762daaca3152f3e79380ea0) smp.c (03b505eae6a276b8c38b6222694afb6cea10b1cc)
1/*
2 * linux/arch/arm/kernel/smp.c
3 *
4 * Copyright (C) 2002 ARM Limited, All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.

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33#include <asm/mmu_context.h>
34#include <asm/pgtable.h>
35#include <asm/pgalloc.h>
36#include <asm/processor.h>
37#include <asm/sections.h>
38#include <asm/tlbflush.h>
39#include <asm/ptrace.h>
40#include <asm/localtimer.h>
1/*
2 * linux/arch/arm/kernel/smp.c
3 *
4 * Copyright (C) 2002 ARM Limited, All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.

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33#include <asm/mmu_context.h>
34#include <asm/pgtable.h>
35#include <asm/pgalloc.h>
36#include <asm/processor.h>
37#include <asm/sections.h>
38#include <asm/tlbflush.h>
39#include <asm/ptrace.h>
40#include <asm/localtimer.h>
41#include <asm/smp_plat.h>
42
43/*
44 * as from 2.5, kernels no longer have an init_tasks structure
45 * so we need some other way of telling a new secondary core
46 * where to place its SVC stack
47 */
48struct secondary_data secondary_data;
49

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650
651/*
652 * not supported here
653 */
654int setup_profiling_timer(unsigned int multiplier)
655{
656 return -EINVAL;
657}
41
42/*
43 * as from 2.5, kernels no longer have an init_tasks structure
44 * so we need some other way of telling a new secondary core
45 * where to place its SVC stack
46 */
47struct secondary_data secondary_data;
48

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649
650/*
651 * not supported here
652 */
653int setup_profiling_timer(unsigned int multiplier)
654{
655 return -EINVAL;
656}
658
659static void
660on_each_cpu_mask(void (*func)(void *), void *info, int wait,
661 const struct cpumask *mask)
662{
663 preempt_disable();
664
665 smp_call_function_many(mask, func, info, wait);
666 if (cpumask_test_cpu(smp_processor_id(), mask))
667 func(info);
668
669 preempt_enable();
670}
671
672/**********************************************************************/
673
674/*
675 * TLB operations
676 */
677struct tlb_args {
678 struct vm_area_struct *ta_vma;
679 unsigned long ta_start;
680 unsigned long ta_end;
681};
682
683static inline void ipi_flush_tlb_all(void *ignored)
684{
685 local_flush_tlb_all();
686}
687
688static inline void ipi_flush_tlb_mm(void *arg)
689{
690 struct mm_struct *mm = (struct mm_struct *)arg;
691
692 local_flush_tlb_mm(mm);
693}
694
695static inline void ipi_flush_tlb_page(void *arg)
696{
697 struct tlb_args *ta = (struct tlb_args *)arg;
698
699 local_flush_tlb_page(ta->ta_vma, ta->ta_start);
700}
701
702static inline void ipi_flush_tlb_kernel_page(void *arg)
703{
704 struct tlb_args *ta = (struct tlb_args *)arg;
705
706 local_flush_tlb_kernel_page(ta->ta_start);
707}
708
709static inline void ipi_flush_tlb_range(void *arg)
710{
711 struct tlb_args *ta = (struct tlb_args *)arg;
712
713 local_flush_tlb_range(ta->ta_vma, ta->ta_start, ta->ta_end);
714}
715
716static inline void ipi_flush_tlb_kernel_range(void *arg)
717{
718 struct tlb_args *ta = (struct tlb_args *)arg;
719
720 local_flush_tlb_kernel_range(ta->ta_start, ta->ta_end);
721}
722
723void flush_tlb_all(void)
724{
725 if (tlb_ops_need_broadcast())
726 on_each_cpu(ipi_flush_tlb_all, NULL, 1);
727 else
728 local_flush_tlb_all();
729}
730
731void flush_tlb_mm(struct mm_struct *mm)
732{
733 if (tlb_ops_need_broadcast())
734 on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, mm_cpumask(mm));
735 else
736 local_flush_tlb_mm(mm);
737}
738
739void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
740{
741 if (tlb_ops_need_broadcast()) {
742 struct tlb_args ta;
743 ta.ta_vma = vma;
744 ta.ta_start = uaddr;
745 on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, mm_cpumask(vma->vm_mm));
746 } else
747 local_flush_tlb_page(vma, uaddr);
748}
749
750void flush_tlb_kernel_page(unsigned long kaddr)
751{
752 if (tlb_ops_need_broadcast()) {
753 struct tlb_args ta;
754 ta.ta_start = kaddr;
755 on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1);
756 } else
757 local_flush_tlb_kernel_page(kaddr);
758}
759
760void flush_tlb_range(struct vm_area_struct *vma,
761 unsigned long start, unsigned long end)
762{
763 if (tlb_ops_need_broadcast()) {
764 struct tlb_args ta;
765 ta.ta_vma = vma;
766 ta.ta_start = start;
767 ta.ta_end = end;
768 on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, mm_cpumask(vma->vm_mm));
769 } else
770 local_flush_tlb_range(vma, start, end);
771}
772
773void flush_tlb_kernel_range(unsigned long start, unsigned long end)
774{
775 if (tlb_ops_need_broadcast()) {
776 struct tlb_args ta;
777 ta.ta_start = start;
778 ta.ta_end = end;
779 on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1);
780 } else
781 local_flush_tlb_kernel_range(start, end);
782}