diff options
Diffstat (limited to 'arch/metag/kernel/tbiunexp.S')
| -rw-r--r-- | arch/metag/kernel/tbiunexp.S | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/metag/kernel/tbiunexp.S b/arch/metag/kernel/tbiunexp.S new file mode 100644 index 00000000000..907bbe0b2e6 --- /dev/null +++ b/arch/metag/kernel/tbiunexp.S @@ -0,0 +1,22 @@ +/* Pass a breakpoint through to Codescape */ + +#include <asm/tbx.h> + + .text + .global ___TBIUnExpXXX + .type ___TBIUnExpXXX,function +___TBIUnExpXXX: + TSTT D0Ar2,#TBICTX_CRIT_BIT ! Result of nestable int call? + BZ $LTBINormCase ! UnExpXXX at background level + MOV D0Re0,TXMASKI ! Read TXMASKI + XOR TXMASKI,D1Re0,D1Re0 ! Turn off BGNDHALT handling! + OR D0Ar2,D0Ar2,D0Re0 ! Preserve bits cleared +$LTBINormCase: + MSETL [A0StP],D0Ar6,D0Ar4,D0Ar2 ! Save args on stack + SETL [A0StP++],D0Ar2,D1Ar1 ! Init area for returned values + SWITCH #0xC20208 ! Total stack frame size 8 Dwords + ! write back size 2 Dwords + GETL D0Re0,D1Re0,[--A0StP] ! Get result + SUB A0StP,A0StP,#(8*3) ! Recover stack frame + MOV PC,D1RtP + .size ___TBIUnExpXXX,.-___TBIUnExpXXX |