[SPARC64]: Move kernel unaligned trap handlers into assembler file.

GCC 4.x really dislikes the games we are playing in
unaligned.c, and the cleanest way to fix this is to
move things into assembler.

Noted by Al Viro.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 153 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/una_asm.S b/arch/sparc64/kernel/una_asm.S
new file mode 100644
index 000000000000..cbb40585253c
--- /dev/null
+++ b/arch/sparc64/kernel/una_asm.S
@@ -0,0 +1,153 @@
+/* una_asm.S: Kernel unaligned trap assembler helpers.
+ *
+ * Copyright (C) 1996,2005 David S. Miller (davem@davemloft.net)
+ * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+
+        .text
+
+kernel_unaligned_trap_fault:
+        call    kernel_mna_trap_fault
+         nop
+        retl
+         nop
+        .size   kern_unaligned_trap_fault, .-kern_unaligned_trap_fault
+
+        .globl  __do_int_store
+__do_int_store:
+        rd      %asi, %o4
+        wr      %o3, 0, %asi
+        ldx     [%o2], %g3
+        cmp     %o1, 2
+        be,pn   %icc, 2f
+         cmp    %o1, 4
+        be,pt   %icc, 1f
+         srlx   %g3, 24, %g2
+        srlx    %g3, 56, %g1
+        srlx    %g3, 48, %g7
+4:      stba    %g1, [%o0] %asi
+        srlx    %g3, 40, %g1
+5:      stba    %g7, [%o0 + 1] %asi
+        srlx    %g3, 32, %g7
+6:      stba    %g1, [%o0 + 2] %asi
+7:      stba    %g7, [%o0 + 3] %asi
+        srlx    %g3, 16, %g1
+8:      stba    %g2, [%o0 + 4] %asi
+        srlx    %g3, 8, %g7
+9:      stba    %g1, [%o0 + 5] %asi
+10:     stba    %g7, [%o0 + 6] %asi
+        ba,pt   %xcc, 0f
+11:      stba   %g3, [%o0 + 7] %asi
+1:      srl     %g3, 16, %g7
+12:     stba    %g2, [%o0] %asi
+        srl     %g3, 8, %g2
+13:     stba    %g7, [%o0 + 1] %asi
+14:     stba    %g2, [%o0 + 2] %asi
+        ba,pt   %xcc, 0f
+15:      stba   %g3, [%o0 + 3] %asi
+2:      srl     %g3, 8, %g2
+16:     stba    %g2, [%o0] %asi
+17:     stba    %g3, [%o0 + 1] %asi
+0:
+        wr      %o4, 0x0, %asi
+        retl
+         nop
+        .size   __do_int_store, .-__do_int_store
+
+        .section        __ex_table
+        .word           4b, kernel_unaligned_trap_fault
+        .word           5b, kernel_unaligned_trap_fault
+        .word           6b, kernel_unaligned_trap_fault
+        .word           7b, kernel_unaligned_trap_fault
+        .word           8b, kernel_unaligned_trap_fault
+        .word           9b, kernel_unaligned_trap_fault
+        .word           10b, kernel_unaligned_trap_fault
+        .word           11b, kernel_unaligned_trap_fault
+        .word           12b, kernel_unaligned_trap_fault
+        .word           13b, kernel_unaligned_trap_fault
+        .word           14b, kernel_unaligned_trap_fault
+        .word           15b, kernel_unaligned_trap_fault
+        .word           16b, kernel_unaligned_trap_fault
+        .word           17b, kernel_unaligned_trap_fault
+        .previous
+
+        .globl  do_int_load
+do_int_load:
+        rd      %asi, %o5
+        wr      %o4, 0, %asi
+        cmp     %o1, 8
+        bge,pn  %icc, 9f
+         cmp    %o1, 4
+        be,pt   %icc, 6f
+4:       lduba  [%o2] %asi, %g2
+5:      lduba   [%o2 + 1] %asi, %g3
+        sll     %g2, 8, %g2
+        brz,pt  %o3, 3f
+         add    %g2, %g3, %g2
+        sllx    %g2, 48, %g2
+        srax    %g2, 48, %g2
+3:      ba,pt   %xcc, 0f
+         stx    %g2, [%o0]
+6:      lduba   [%o2 + 1] %asi, %g3
+        sll     %g2, 24, %g2
+7:      lduba   [%o2 + 2] %asi, %g7
+        sll     %g3, 16, %g3
+8:      lduba   [%o2 + 3] %asi, %g1
+        sll     %g7, 8, %g7
+        or      %g2, %g3, %g2
+        or      %g7, %g1, %g7
+        or      %g2, %g7, %g2
+        brnz,a,pt %o3, 3f
+         sra    %g2, 0, %g2
+3:      ba,pt   %xcc, 0f
+         stx    %g2, [%o0]
+9:      lduba   [%o2] %asi, %g2
+10:     lduba   [%o2 + 1] %asi, %g3
+        sllx    %g2, 56, %g2
+11:     lduba   [%o2 + 2] %asi, %g7
+        sllx    %g3, 48, %g3
+12:     lduba   [%o2 + 3] %asi, %g1
+        sllx    %g7, 40, %g7
+        sllx    %g1, 32, %g1
+        or      %g2, %g3, %g2
+        or      %g7, %g1, %g7
+13:     lduba   [%o2 + 4] %asi, %g3
+        or      %g2, %g7, %g7
+14:     lduba   [%o2 + 5] %asi, %g1
+        sllx    %g3, 24, %g3
+15:     lduba   [%o2 + 6] %asi, %g2
+        sllx    %g1, 16, %g1
+        or      %g7, %g3, %g7
+16:     lduba   [%o2 + 7] %asi, %g3
+        sllx    %g2, 8, %g2
+        or      %g7, %g1, %g7
+        or      %g2, %g3, %g2
+        or      %g7, %g2, %g7
+        cmp     %o1, 8
+        be,a,pt %icc, 0f
+         stx    %g7, [%o0]
+        srlx    %g7, 32, %g2
+        sra     %g7, 0, %g7
+        stx     %g2, [%o0]
+        stx     %g7, [%o0 + 8]
+0:
+        wr      %o5, 0x0, %asi
+        retl
+         nop
+        .size   __do_int_load, .-__do_int_load
+
+        .section        __ex_table
+        .word           4b, kernel_unaligned_trap_fault
+        .word           5b, kernel_unaligned_trap_fault
+        .word           6b, kernel_unaligned_trap_fault
+        .word           7b, kernel_unaligned_trap_fault
+        .word           8b, kernel_unaligned_trap_fault
+        .word           9b, kernel_unaligned_trap_fault
+        .word           10b, kernel_unaligned_trap_fault
+        .word           11b, kernel_unaligned_trap_fault
+        .word           12b, kernel_unaligned_trap_fault
+        .word           13b, kernel_unaligned_trap_fault
+        .word           14b, kernel_unaligned_trap_fault
+        .word           15b, kernel_unaligned_trap_fault
+        .word           16b, kernel_unaligned_trap_fault
+        .previous