diff options
Diffstat (limited to 'arch/mips/mm/tlb-andes.c')
-rw-r--r-- | arch/mips/mm/tlb-andes.c | 259 |
1 files changed, 0 insertions, 259 deletions
diff --git a/arch/mips/mm/tlb-andes.c b/arch/mips/mm/tlb-andes.c deleted file mode 100644 index 3f422a849c4..00000000000 --- a/arch/mips/mm/tlb-andes.c +++ /dev/null @@ -1,259 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 1997, 1998, 1999 Ralf Baechle (ralf@gnu.org) - * Copyright (C) 1999 Silicon Graphics, Inc. - * Copyright (C) 2000 Kanoj Sarcar (kanoj@sgi.com) - */ -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/mm.h> -#include <asm/page.h> -#include <asm/pgtable.h> -#include <asm/system.h> -#include <asm/mmu_context.h> - -extern void build_tlb_refill_handler(void); - -#define NTLB_ENTRIES 64 -#define NTLB_ENTRIES_HALF 32 - -void local_flush_tlb_all(void) -{ - unsigned long flags; - unsigned long old_ctx; - unsigned long entry; - - local_irq_save(flags); - /* Save old context and create impossible VPN2 value */ - old_ctx = read_c0_entryhi() & ASID_MASK; - write_c0_entryhi(CKSEG0); - write_c0_entrylo0(0); - write_c0_entrylo1(0); - - entry = read_c0_wired(); - - /* Blast 'em all away. */ - while (entry < NTLB_ENTRIES) { - write_c0_index(entry); - tlb_write_indexed(); - entry++; - } - write_c0_entryhi(old_ctx); - local_irq_restore(flags); -} - -void local_flush_tlb_mm(struct mm_struct *mm) -{ - int cpu = smp_processor_id(); - if (cpu_context(cpu, mm) != 0) { - drop_mmu_context(mm,cpu); - } -} - -void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, - unsigned long end) -{ - struct mm_struct *mm = vma->vm_mm; - int cpu = smp_processor_id(); - - if (cpu_context(cpu, mm) != 0) { - unsigned long flags; - int size; - - local_irq_save(flags); - size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT; - size = (size + 1) >> 1; - if (size <= NTLB_ENTRIES_HALF) { - int oldpid = (read_c0_entryhi() & ASID_MASK); - int newpid = (cpu_context(smp_processor_id(), mm) - & ASID_MASK); - - start &= (PAGE_MASK << 1); - end += ((PAGE_SIZE << 1) - 1); - end &= (PAGE_MASK << 1); - while(start < end) { - int idx; - - write_c0_entryhi(start | newpid); - start += (PAGE_SIZE << 1); - tlb_probe(); - idx = read_c0_index(); - write_c0_entrylo0(0); - write_c0_entrylo1(0); - write_c0_entryhi(CKSEG0); - if(idx < 0) - continue; - tlb_write_indexed(); - } - write_c0_entryhi(oldpid); - } else { - drop_mmu_context(mm, cpu); - } - local_irq_restore(flags); - } -} - -void local_flush_tlb_kernel_range(unsigned long start, unsigned long end) -{ - unsigned long flags; - int size; - - size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT; - size = (size + 1) >> 1; - - local_irq_save(flags); - if (size <= NTLB_ENTRIES_HALF) { - int pid = read_c0_entryhi(); - - start &= (PAGE_MASK << 1); - end += ((PAGE_SIZE << 1) - 1); - end &= (PAGE_MASK << 1); - - while (start < end) { - int idx; - - write_c0_entryhi(start); - start += (PAGE_SIZE << 1); - tlb_probe(); - idx = read_c0_index(); - write_c0_entrylo0(0); - write_c0_entrylo1(0); - write_c0_entryhi(CKSEG0 + (idx << (PAGE_SHIFT+1))); - if (idx < 0) - continue; - tlb_write_indexed(); - } - write_c0_entryhi(pid); - } else { - local_flush_tlb_all(); - } - local_irq_restore(flags); -} - -void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page) -{ - if (cpu_context(smp_processor_id(), vma->vm_mm) != 0) { - unsigned long flags; - int oldpid, newpid, idx; - - newpid = (cpu_context(smp_processor_id(), vma->vm_mm) & - ASID_MASK); - page &= (PAGE_MASK << 1); - local_irq_save(flags); - oldpid = (read_c0_entryhi() & ASID_MASK); - write_c0_entryhi(page | newpid); - tlb_probe(); - idx = read_c0_index(); - write_c0_entrylo0(0); - write_c0_entrylo1(0); - write_c0_entryhi(CKSEG0); - if (idx < 0) - goto finish; - tlb_write_indexed(); - - finish: - write_c0_entryhi(oldpid); - local_irq_restore(flags); - } -} - -/* - * This one is only used for pages with the global bit set so we don't care - * much about the ASID. - */ -void local_flush_tlb_one(unsigned long page) -{ - unsigned long flags; - int oldpid, idx; - - local_irq_save(flags); - page &= (PAGE_MASK << 1); - oldpid = read_c0_entryhi() & 0xff; - write_c0_entryhi(page); - tlb_probe(); - idx = read_c0_index(); - write_c0_entrylo0(0); - write_c0_entrylo1(0); - if (idx >= 0) { - /* Make sure all entries differ. */ - write_c0_entryhi(CKSEG0+(idx<<(PAGE_SHIFT+1))); - tlb_write_indexed(); - } - write_c0_entryhi(oldpid); - - local_irq_restore(flags); -} - -/* XXX Simplify this. On the R10000 writing a TLB entry for an virtual - address that already exists will overwrite the old entry and not result - in TLB malfunction or TLB shutdown. */ -void __update_tlb(struct vm_area_struct * vma, unsigned long address, pte_t pte) -{ - unsigned long flags; - pgd_t *pgdp; - pud_t *pudp; - pmd_t *pmdp; - pte_t *ptep; - int idx, pid; - - /* - * Handle debugger faulting in for debugee. - */ - if (current->active_mm != vma->vm_mm) - return; - - pid = read_c0_entryhi() & ASID_MASK; - - if ((pid != (cpu_context(smp_processor_id(), vma->vm_mm) & ASID_MASK)) - || (cpu_context(smp_processor_id(), vma->vm_mm) == 0)) { - printk(KERN_WARNING - "%s: Wheee, bogus tlbpid mmpid=%d tlbpid=%d\n", - __FUNCTION__, (int) (cpu_context(smp_processor_id(), - vma->vm_mm) & ASID_MASK), pid); - } - - local_irq_save(flags); - address &= (PAGE_MASK << 1); - write_c0_entryhi(address | (pid)); - pgdp = pgd_offset(vma->vm_mm, address); - tlb_probe(); - pudp = pud_offset(pgdp, address); - pmdp = pmd_offset(pudp, address); - idx = read_c0_index(); - ptep = pte_offset_map(pmdp, address); - write_c0_entrylo0(pte_val(*ptep++) >> 6); - write_c0_entrylo1(pte_val(*ptep) >> 6); - write_c0_entryhi(address | pid); - if (idx < 0) { - tlb_write_random(); - } else { - tlb_write_indexed(); - } - write_c0_entryhi(pid); - local_irq_restore(flags); -} - -void __init tlb_init(void) -{ - /* - * You should never change this register: - * - On R4600 1.7 the tlbp never hits for pages smaller than - * the value in the c0_pagemask register. - * - The entire mm handling assumes the c0_pagemask register to - * be set for 4kb pages. - */ - write_c0_pagemask(PM_4K); - write_c0_wired(0); - write_c0_framemask(0); - - /* From this point on the ARC firmware is dead. */ - local_flush_tlb_all(); - - /* Did I tell you that ARC SUCKS? */ - - build_tlb_refill_handler(); -} |