diff options
Diffstat (limited to 'arch/cris/arch-v10/mm/fault.c')
-rw-r--r-- | arch/cris/arch-v10/mm/fault.c | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/arch/cris/arch-v10/mm/fault.c b/arch/cris/arch-v10/mm/fault.c deleted file mode 100644 index e6c225169642..000000000000 --- a/arch/cris/arch-v10/mm/fault.c +++ /dev/null @@ -1,96 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * linux/arch/cris/mm/fault.c - * - * Low level bus fault handler - * - * - * Copyright (C) 2000-2007 Axis Communications AB - * - * Authors: Bjorn Wesen - * - */ - -#include <linux/mm.h> -#include <linux/uaccess.h> -#include <asm/pgtable.h> -#include <arch/svinto.h> -#include <asm/mmu_context.h> - -/* debug of low-level TLB reload */ -#undef DEBUG - -#ifdef DEBUG -#define D(x) x -#else -#define D(x) -#endif - -extern const struct exception_table_entry - *search_exception_tables(unsigned long addr); - -asmlinkage void do_page_fault(unsigned long address, struct pt_regs *regs, - int protection, int writeaccess); - -/* fast TLB-fill fault handler - * this is called from entry.S with interrupts disabled - */ - -void -handle_mmu_bus_fault(struct pt_regs *regs) -{ - int cause; - int select; -#ifdef DEBUG - int index; - int page_id; - int acc, inv; -#endif - pgd_t* pgd = (pgd_t*)per_cpu(current_pgd, smp_processor_id()); - pmd_t *pmd; - pte_t pte; - int miss, we, writeac; - unsigned long address; - unsigned long flags; - - cause = *R_MMU_CAUSE; - - address = cause & PAGE_MASK; /* get faulting address */ - select = *R_TLB_SELECT; - -#ifdef DEBUG - page_id = IO_EXTRACT(R_MMU_CAUSE, page_id, cause); - acc = IO_EXTRACT(R_MMU_CAUSE, acc_excp, cause); - inv = IO_EXTRACT(R_MMU_CAUSE, inv_excp, cause); - index = IO_EXTRACT(R_TLB_SELECT, index, select); -#endif - miss = IO_EXTRACT(R_MMU_CAUSE, miss_excp, cause); - we = IO_EXTRACT(R_MMU_CAUSE, we_excp, cause); - writeac = IO_EXTRACT(R_MMU_CAUSE, wr_rd, cause); - - D(printk("bus_fault from IRP 0x%lx: addr 0x%lx, miss %d, inv %d, we %d, acc %d, dx %d pid %d\n", - regs->irp, address, miss, inv, we, acc, index, page_id)); - - /* leave it to the MM system fault handler */ - if (miss) - do_page_fault(address, regs, 0, writeac); - else - do_page_fault(address, regs, 1, we); - - /* Reload TLB with new entry to avoid an extra miss exception. - * do_page_fault may have flushed the TLB so we have to restore - * the MMU registers. - */ - local_irq_save(flags); - pmd = (pmd_t *)(pgd + pgd_index(address)); - if (pmd_none(*pmd)) - goto exit; - pte = *pte_offset_kernel(pmd, address); - if (!pte_present(pte)) - goto exit; - *R_TLB_SELECT = select; - *R_TLB_HI = cause; - *R_TLB_LO = pte_val(pte); -exit: - local_irq_restore(flags); -} |