openwrt/target/linux/linux-2.4/patches/006-bcm47xx_workarounds.patch

   1 diff -urN linux.old/arch/mips/mm/tlbex-mips32.S linux.dev/arch/mips/mm/tlbex-mips32.S
   2 --- linux.old/arch/mips/mm/tlbex-mips32.S       2005-05-28 17:42:03.000000000 +0200
   3 +++ linux.dev/arch/mips/mm/tlbex-mips32.S       2005-05-28 21:48:55.000000000 +0200
   4 @@ -90,6 +90,9 @@
   5         .set    noat
   6         LEAF(except_vec0_r4000)
   7         .set    mips3
   8 +#ifdef CONFIG_BCM4704
   9 +       nop
  10 +#endif
  11  #ifdef CONFIG_SMP
  12         mfc0    k1, CP0_CONTEXT
  13         la      k0, pgd_current
  14 diff -urN linux.old/arch/mips/mm/pg-r4k.c linux.dev/arch/mips/mm/pg-r4k.c
  15 --- linux.old/arch/mips/mm/pg-r4k.c     2005-01-19 15:09:29.000000000 +0100
  16 +++ linux.dev/arch/mips/mm/pg-r4k.c     2005-05-28 21:57:52.000000000 +0200
  17 @@ -180,6 +180,7 @@
  18
  19  static inline void build_cdex_s(void)
  20  {
  21 +#if !defined(CONFIG_BCM4704) && !defined(CONFIG_BCM4710)
  22         union mips_instruction mi;
  23
  24         if ((store_offset & (cpu_scache_line_size() - 1)))
  25 @@ -192,10 +193,12 @@
  26         mi.c_format.simmediate = store_offset;
  27
  28         emit_instruction(mi);
  29 +#endif
  30  }
  31
  32  static inline void build_cdex_p(void)
  33  {
  34 +#if !defined(CONFIG_BCM4704) && !defined(CONFIG_BCM4710)
  35         union mips_instruction mi;
  36
  37         if (store_offset & (cpu_dcache_line_size() - 1))
  38 @@ -218,6 +221,7 @@
  39         mi.c_format.simmediate = store_offset;
  40
  41         emit_instruction(mi);
  42 +#endif
  43  }
  44
  45  static void __build_store_reg(int reg)
  46 diff -urN linux.old/include/asm-mips/stackframe.h linux.dev/include/asm-mips/stackframe.h
  47 --- linux.old/include/asm-mips/stackframe.h     2002-11-29 00:53:15.000000000 +0100
  48 +++ linux.dev/include/asm-mips/stackframe.h     2005-05-28 21:53:03.000000000 +0200
  49 @@ -172,6 +172,46 @@
  50                  rfe;                                    \
  51                 .set    pop
  52
  53 +#elif defined(CONFIG_BCM4710) || defined(CONFIG_BCM4704)
  54 +
  55 +#define RESTORE_SOME                                     \
  56 +               .set    push;                            \
  57 +               .set    reorder;                         \
  58 +               mfc0    t0, CP0_STATUS;                  \
  59 +               .set    pop;                             \
  60 +               ori     t0, 0x1f;                        \
  61 +               xori    t0, 0x1f;                        \
  62 +               mtc0    t0, CP0_STATUS;                  \
  63 +               li      v1, 0xff00;                      \
  64 +               and     t0, v1;                          \
  65 +               lw      v0, PT_STATUS(sp);               \
  66 +               nor     v1, $0, v1;                      \
  67 +               and     v0, v1;                          \
  68 +               or      v0, t0;                          \
  69 +               ori     v1, v0, ST0_IE;                  \
  70 +               xori    v1, v1, ST0_IE;                  \
  71 +               mtc0    v1, CP0_STATUS;                  \
  72 +               mtc0    v0, CP0_STATUS;                  \
  73 +               lw      v1, PT_EPC(sp);                  \
  74 +               mtc0    v1, CP0_EPC;                     \
  75 +               lw      $31, PT_R31(sp);                 \
  76 +               lw      $28, PT_R28(sp);                 \
  77 +               lw      $25, PT_R25(sp);                 \
  78 +               lw      $7,  PT_R7(sp);                  \
  79 +               lw      $6,  PT_R6(sp);                  \
  80 +               lw      $5,  PT_R5(sp);                  \
  81 +               lw      $4,  PT_R4(sp);                  \
  82 +               lw      $3,  PT_R3(sp);                  \
  83 +               lw      $2,  PT_R2(sp)
  84 +
  85 +#define RESTORE_SP_AND_RET                               \
  86 +               lw      sp,  PT_R29(sp);                 \
  87 +               nop;                                     \
  88 +               nop;                                     \
  89 +               .set    mips3;                           \
  90 +               eret;                                    \
  91 +               .set    mips0
  92 +
  93  #else
  94
  95  #define RESTORE_SOME                                     \
  96 diff -urN linux.old/arch/mips/mm/tlbex-r4k.S linux.dev/arch/mips/mm/tlbex-r4k.S
  97 --- linux.old/arch/mips/mm/tlbex-r4k.S  2005-05-28 17:42:03.000000000 +0200
  98 +++ linux.dev/arch/mips/mm/tlbex-r4k.S  2005-05-29 15:04:43.000000000 +0200
  99 @@ -168,6 +168,9 @@
 100         .set    noat
 101         LEAF(except_vec0_r4000)
 102         .set    mips3
 103 +#ifdef CONFIG_BCM4704
 104 +       nop
 105 +#endif
 106         GET_PGD(k0, k1)                         # get pgd pointer
 107         mfc0    k0, CP0_BADVADDR                # Get faulting address
 108         srl     k0, k0, _PGDIR_SHIFT            # get pgd only bits