| /* |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * Copyright (C) 1994 - 1999 by Ralf Baechle |
| * Copyright (C) 1999 Silicon Graphics |
| * |
| * Low level exception handling |
| */ |
| #include <asm/asm.h> |
| #include <asm/regdef.h> |
| #include <asm/fpregdef.h> |
| #include <asm/mipsregs.h> |
| #include <asm/stackframe.h> |
| |
| .macro __build_clear_none |
| .endm |
| |
| .macro __build_clear_sti |
| STI |
| .endm |
| |
| .macro __build_clear_cli |
| CLI |
| .endm |
| |
| .macro __build_clear_fpe |
| cfc1 a1, fcr31 |
| li a2, ~(0x3f << 12) |
| and a2, a1 |
| ctc1 a2, fcr31 |
| STI |
| .endm |
| |
| .macro __build_clear_ade |
| dmfc0 t0, CP0_BADVADDR |
| sd t0, PT_BVADDR(sp) |
| KMODE |
| .endm |
| |
| .macro __BUILD_silent exception |
| .endm |
| |
| /* Gas tries to parse the PRINT argument as a string containing |
| string escapes and emits bogus warnings if it believes to |
| recognize an unknown escape code. So make the arguments |
| start with an n and gas will believe \n is ok ... */ |
| .macro __BUILD_verbose nexception |
| ld a1, PT_EPC(sp) |
| PRINT("Got \nexception at %016lx\012") |
| .endm |
| |
| .macro __BUILD_count exception |
| .set reorder |
| ld t0,exception_count_\exception |
| daddiu t0, 1 |
| sd t0,exception_count_\exception |
| .set noreorder |
| .comm exception_count\exception, 8, 8 |
| .endm |
| |
| .macro BUILD_HANDLER exception handler clear verbose |
| .align 5 |
| NESTED(handle_\exception, PT_SIZE, sp) |
| .set noat |
| SAVE_ALL |
| __BUILD_clear_\clear |
| .set at |
| __BUILD_\verbose \exception |
| move a0, sp |
| jal do_\handler |
| j ret_from_exception |
| nop |
| END(handle_\exception) |
| .endm |
