tlb-v4.S 1.6 KB

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  1. /*
  2. * linux/arch/arm/mm/tlbv4.S
  3. *
  4. * Copyright (C) 1997-2002 Russell King
  5. *
  6. * This program is free software; you can redistribute it and/or modify
  7. * it under the terms of the GNU General Public License version 2 as
  8. * published by the Free Software Foundation.
  9. *
  10. * ARM architecture version 4 TLB handling functions.
  11. * These assume a split I/D TLBs, and no write buffer.
  12. *
  13. * Processors: ARM720T
  14. */
  15. #include <linux/linkage.h>
  16. #include <linux/init.h>
  17. #include <asm/asm-offsets.h>
  18. #include <asm/tlbflush.h>
  19. #include "proc-macros.S"
  20. .align 5
  21. /*
  22. * v4_flush_user_tlb_range(start, end, mm)
  23. *
  24. * Invalidate a range of TLB entries in the specified user address space.
  25. *
  26. * - start - range start address
  27. * - end - range end address
  28. * - mm - mm_struct describing address space
  29. */
  30. .align 5
  31. ENTRY(v4_flush_user_tlb_range)
  32. vma_vm_mm ip, r2
  33. act_mm r3 @ get current->active_mm
  34. eors r3, ip, r3 @ == mm ?
  35. movne pc, lr @ no, we dont do anything
  36. .v4_flush_kern_tlb_range:
  37. bic r0, r0, #0x0ff
  38. bic r0, r0, #0xf00
  39. 1: mcr p15, 0, r0, c8, c7, 1 @ invalidate TLB entry
  40. add r0, r0, #PAGE_SZ
  41. cmp r0, r1
  42. blo 1b
  43. mov pc, lr
  44. /*
  45. * v4_flush_kern_tlb_range(start, end)
  46. *
  47. * Invalidate a range of TLB entries in the specified kernel
  48. * address range.
  49. *
  50. * - start - virtual address (may not be aligned)
  51. * - end - virtual address (may not be aligned)
  52. */
  53. .globl v4_flush_kern_tlb_range
  54. .equ v4_flush_kern_tlb_range, .v4_flush_kern_tlb_range
  55. __INITDATA
  56. .type v4_tlb_fns, #object
  57. ENTRY(v4_tlb_fns)
  58. .long v4_flush_user_tlb_range
  59. .long v4_flush_kern_tlb_range
  60. .long v4_tlb_flags
  61. .size v4_tlb_fns, . - v4_tlb_fns