diff options
Diffstat (limited to 'utils/hwstub/stub/asm/mips/system.S')
-rw-r--r-- | utils/hwstub/stub/asm/mips/system.S | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/utils/hwstub/stub/asm/mips/system.S b/utils/hwstub/stub/asm/mips/system.S new file mode 100644 index 0000000000..ab134aed48 --- /dev/null +++ b/utils/hwstub/stub/asm/mips/system.S @@ -0,0 +1,51 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * + * Copyright (C) 2015 by Marcin Bukat + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ +#include "mips.h" + +/* Handling of data abort: + * the code can register a "longjmp" buffer to restore the context in case of + * fault */ +.data +.global data_abort_jmp_ctx_ptr +data_abort_jmp_ctx_ptr: +/* buffer contains in order: s0-s7, sp, s8, ra */ +.skip 44 /* = 4 * (9 callee saved registers + sp + ra) */ + +.set noreorder +.section .icode, "ax", %progbits +/* Prototype: int set_data_abort_jmp() + * Return: 1 in case of data abort, 0 otherwise */ +.global set_data_abort_jmp +set_data_abort_jmp: + la v0, data_abort_jmp_ctx_ptr + sw s0, 0(v0) + sw s1, 4(v0) + sw s2, 8(v0) + sw s3, 12(v0) + sw s4, 16(v0) + sw s5, 20(v0) + sw s6, 24(v0) + sw s7, 28(v0) + sw sp, 32(v0) + sw s8, 36(v0) + sw ra, 40(v0) + jr ra + move v0, zero +.set reorder |