diff options
Diffstat (limited to 'arch/openrisc/mm/tlb.c')
| -rw-r--r-- | arch/openrisc/mm/tlb.c | 48 |
1 files changed, 20 insertions, 28 deletions
diff --git a/arch/openrisc/mm/tlb.c b/arch/openrisc/mm/tlb.c index 683bd4d31c7c..3115f2e4f864 100644 --- a/arch/openrisc/mm/tlb.c +++ b/arch/openrisc/mm/tlb.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * OpenRISC tlb.c * @@ -9,11 +10,6 @@ * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> * Copyright (C) 2010-2011 Julius Baxter <julius.baxter@orsoc.se> * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. */ #include <linux/sched.h> @@ -26,9 +22,7 @@ #include <linux/mm.h> #include <linux/init.h> -#include <asm/segment.h> #include <asm/tlbflush.h> -#include <asm/pgtable.h> #include <asm/mmu_context.h> #include <asm/spr_defs.h> @@ -49,7 +43,7 @@ * */ -void flush_tlb_all(void) +void local_flush_tlb_all(void) { int i; unsigned long num_tlb_sets; @@ -86,7 +80,7 @@ void flush_tlb_all(void) #define flush_itlb_page_no_eir(addr) \ mtspr_off(SPR_ITLBMR_BASE(0), ITLB_OFFSET(addr), 0); -void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) +void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) { if (have_dtlbeir) flush_dtlb_page_eir(addr); @@ -99,8 +93,8 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) flush_itlb_page_no_eir(addr); } -void flush_tlb_range(struct vm_area_struct *vma, - unsigned long start, unsigned long end) +void local_flush_tlb_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end) { int addr; bool dtlbeir; @@ -129,13 +123,13 @@ void flush_tlb_range(struct vm_area_struct *vma, * This should be changed to loop over over mm and call flush_tlb_range. */ -void flush_tlb_mm(struct mm_struct *mm) +void local_flush_tlb_mm(struct mm_struct *mm) { /* Was seeing bugs with the mm struct passed to us. Scrapped most of this function. */ - /* Several architctures do this */ - flush_tlb_all(); + /* Several architectures do this */ + local_flush_tlb_all(); } /* called in schedule() just before actually doing the switch_to */ @@ -143,21 +137,28 @@ void flush_tlb_mm(struct mm_struct *mm) void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *next_tsk) { + unsigned int cpu; + + if (unlikely(prev == next)) + return; + + cpu = smp_processor_id(); + + cpumask_clear_cpu(cpu, mm_cpumask(prev)); + cpumask_set_cpu(cpu, mm_cpumask(next)); + /* remember the pgd for the fault handlers * this is similar to the pgd register in some other CPU's. * we need our own copy of it because current and active_mm * might be invalid at points where we still need to derefer * the pgd. */ - current_pgd = next->pgd; + current_pgd[cpu] = next->pgd; /* We don't have context support implemented, so flush all * entries belonging to previous map */ - - if (prev != next) - flush_tlb_mm(prev); - + local_flush_tlb_mm(prev); } /* @@ -181,12 +182,3 @@ void destroy_context(struct mm_struct *mm) flush_tlb_mm(mm); } - -/* called once during VM initialization, from init.c */ - -void __init tlb_init(void) -{ - /* Do nothing... */ - /* invalidate the entire TLB */ - /* flush_tlb_all(); */ -} |