diff options
Diffstat (limited to 'arch/unicore32/mm/proc-macros.S')
| -rw-r--r-- | arch/unicore32/mm/proc-macros.S | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/arch/unicore32/mm/proc-macros.S b/arch/unicore32/mm/proc-macros.S new file mode 100644 index 00000000000..51560d68c89 --- /dev/null +++ b/arch/unicore32/mm/proc-macros.S @@ -0,0 +1,145 @@ +/* + * linux/arch/unicore32/mm/proc-macros.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. + * + * We need constants.h for: + * VMA_VM_MM + * VMA_VM_FLAGS + * VM_EXEC + */ +#include <generated/asm-offsets.h> +#include <asm/thread_info.h> +#include <asm/memory.h> + +/* + * the cache line sizes of the I and D cache are the same + */ +#define CACHE_LINESIZE 32 + +/* + * This is the maximum size of an area which will be invalidated + * using the single invalidate entry instructions. Anything larger + * than this, and we go for the whole cache. + * + * This value should be chosen such that we choose the cheapest + * alternative. + */ +#ifdef CONFIG_CPU_UCV2 +#define MAX_AREA_SIZE 0x800 /* 64 cache line */ +#endif + +/* + * vma_vm_mm - get mm pointer from vma pointer (vma->vm_mm) + */ + .macro vma_vm_mm, rd, rn + ldw \rd, [\rn+], #VMA_VM_MM + .endm + +/* + * vma_vm_flags - get vma->vm_flags + */ + .macro vma_vm_flags, rd, rn + ldw \rd, [\rn+], #VMA_VM_FLAGS + .endm + + .macro tsk_mm, rd, rn + ldw \rd, [\rn+], #TI_TASK + ldw \rd, [\rd+], #TSK_ACTIVE_MM + .endm + +/* + * act_mm - get current->active_mm + */ + .macro act_mm, rd + andn \rd, sp, #8128 + andn \rd, \rd, #63 + ldw \rd, [\rd+], #TI_TASK + ldw \rd, [\rd+], #TSK_ACTIVE_MM + .endm + +/* + * mmid - get context id from mm pointer (mm->context.id) + */ + .macro mmid, rd, rn + ldw \rd, [\rn+], #MM_CONTEXT_ID + .endm + +/* + * mask_asid - mask the ASID from the context ID + */ + .macro asid, rd, rn + and \rd, \rn, #255 + .endm + + .macro crval, clear, mmuset, ucset + .word \clear + .word \mmuset + .endm + +#ifndef CONFIG_CPU_DCACHE_LINE_DISABLE +/* + * va2pa va, pa, tbl, msk, off, err + * This macro is used to translate virtual address to its physical address. + * + * va: virtual address + * pa: physical address, result is stored in this register + * tbl, msk, off: temp registers, will be destroyed + * err: jump to error label if the physical address not exist + * NOTE: all regs must be different + */ + .macro va2pa, va, pa, tbl, msk, off, err=990f + movc \pa, p0.c2, #0 + mov \off, \va >> #22 @ off <- index of 1st page table + adr \tbl, 910f @ tbl <- table of 1st page table +900: @ ---- handle 1, 2 page table + add \pa, \pa, #PAGE_OFFSET @ pa <- virt addr of page table + ldw \pa, [\pa+], \off << #2 @ pa <- the content of pt + cand.a \pa, #4 @ test exist bit + beq \err @ if not exist + and \off, \pa, #3 @ off <- the last 2 bits + add \tbl, \tbl, \off << #3 @ cmove table pointer + ldw \msk, [\tbl+], #0 @ get the mask + ldw pc, [\tbl+], #4 +930: @ ---- handle 2nd page table + and \pa, \pa, \msk @ pa <- phys addr of 2nd pt + mov \off, \va << #10 + cntlo \tbl, \msk @ use tbl as temp reg + mov \off, \off >> \tbl + mov \off, \off >> #2 @ off <- index of 2nd pt + adr \tbl, 920f @ tbl <- table of 2nd pt + b 900b +910: @ 1st level page table + .word 0xfffff000, 930b @ second level page table + .word 0xfffffc00, 930b @ second level large page table + .word 0x00000000, \err @ invalid + .word 0xffc00000, 980f @ super page + +920: @ 2nd level page table + .word 0xfffff000, 980f @ page + .word 0xffffc000, 980f @ middle page + .word 0xffff0000, 980f @ large page + .word 0x00000000, \err @ invalid +980: + andn \tbl, \va, \msk + and \pa, \pa, \msk + or \pa, \pa, \tbl +990: + .endm +#endif + + .macro dcacheline_flush, addr, t1, t2 + mov \t1, \addr << #20 + ldw \t2, =_stext @ _stext must ALIGN(4096) + add \t2, \t2, \t1 >> #20 + ldw \t1, [\t2+], #0x0000 + ldw \t1, [\t2+], #0x1000 + ldw \t1, [\t2+], #0x2000 + ldw \t1, [\t2+], #0x3000 + .endm |