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| /*
| * linux/arch/unicore32/mm/tlb-ucv2.S
| *
| * Code specific to PKUnity SoC and UniCore ISA
| *
| * Copyright (C) 2001-2010 GUAN Xue-tao
| *
| * This program is free software; you can redistribute it and/or modify
| * it under the terms of the GNU General Public License version 2 as
| * published by the Free Software Foundation.
| */
| #include <linux/init.h>
| #include <linux/linkage.h>
| #include <asm/assembler.h>
| #include <asm/page.h>
| #include <asm/tlbflush.h>
| #include "proc-macros.S"
|
| /*
| * __cpu_flush_user_tlb_range(start, end, vma)
| *
| * Invalidate a range of TLB entries in the specified address space.
| *
| * - start - start address (may not be aligned)
| * - end - end address (exclusive, may not be aligned)
| * - vma - vma_struct describing address range
| */
| ENTRY(__cpu_flush_user_tlb_range)
| #ifndef CONFIG_CPU_TLB_SINGLE_ENTRY_DISABLE
| mov r0, r0 >> #PAGE_SHIFT @ align address
| mov r0, r0 << #PAGE_SHIFT
| vma_vm_flags r2, r2 @ get vma->vm_flags
| 1:
| movc p0.c6, r0, #3
| nop8
|
| cand.a r2, #VM_EXEC @ Executable area ?
| beq 2f
|
| movc p0.c6, r0, #5
| nop8
| 2:
| add r0, r0, #PAGE_SZ
| csub.a r0, r1
| beb 1b
| #else
| movc p0.c6, r0, #2
| nop8
|
| cand.a r2, #VM_EXEC @ Executable area ?
| beq 2f
|
| movc p0.c6, r0, #4
| nop8
| 2:
| #endif
| mov pc, lr
|
| /*
| * __cpu_flush_kern_tlb_range(start,end)
| *
| * Invalidate a range of kernel TLB entries
| *
| * - start - start address (may not be aligned)
| * - end - end address (exclusive, may not be aligned)
| */
| ENTRY(__cpu_flush_kern_tlb_range)
| #ifndef CONFIG_CPU_TLB_SINGLE_ENTRY_DISABLE
| mov r0, r0 >> #PAGE_SHIFT @ align address
| mov r0, r0 << #PAGE_SHIFT
| 1:
| movc p0.c6, r0, #3
| nop8
|
| movc p0.c6, r0, #5
| nop8
|
| add r0, r0, #PAGE_SZ
| csub.a r0, r1
| beb 1b
| #else
| movc p0.c6, r0, #2
| nop8
|
| movc p0.c6, r0, #4
| nop8
| #endif
| mov pc, lr
|
|
