1 /* src/vm/jit/mips/md.h - machine dependent MIPS functions
3 Copyright (C) 1996-2005, 2006, 2007, 2008
4 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
6 This file is part of CACAO.
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 2, or (at
11 your option) any later version.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
26 #ifndef _VM_JIT_MIPS_MD_H
27 #define _VM_JIT_MIPS_MD_H
34 #include <sys/cachectl.h>
41 /* md_stacktrace_get_returnaddress *********************************************
43 Returns the return address of the current stackframe, specified by
44 the passed stack pointer and the stack frame size.
46 *******************************************************************************/
48 inline static void *md_stacktrace_get_returnaddress(void *sp, int32_t stackframesize)
52 /* On MIPS the return address is located on the top of the
55 ra = *((void **) (((uintptr_t) sp) + stackframesize - 8));
61 /* md_codegen_get_pv_from_pc ***************************************************
67 27feff9c addiu s8,ra,-100
69 *******************************************************************************/
71 inline static void* md_codegen_get_pv_from_pc(void* ra)
75 uint32_t* pc = (uint32_t*) ra;
77 /* get the offset of the instructions */
79 /* get first instruction word after jump */
81 uint32_t mcode = pc[0];
83 /* check if we have 2 instructions (lui, daddiu) */
85 if ((mcode >> 16) == 0x3c19) {
86 /* get displacement of first instruction (lui) */
88 offset = (int32_t) (mcode << 16);
90 /* get displacement of second instruction (daddiu) */
94 #if SIZEOF_VOID_P == 8
95 assert((mcode >> 16) == 0x6739);
97 assert((mcode >> 16) == 0x2739);
100 offset += (int16_t) (mcode & 0x0000ffff);
103 /* get offset of first instruction (daddiu) */
105 #if SIZEOF_VOID_P == 8
106 assert((mcode >> 16) == 0x67fe);
108 assert((mcode >> 16) == 0x27fe);
111 offset = (int16_t) (mcode & 0x0000ffff);
114 /* calculate PV via RA + offset */
116 void* pv = (void*) (((uintptr_t) ra) + offset);
122 /* md_cacheflush ***************************************************************
124 Calls the system's function to flush the instruction and data
127 *******************************************************************************/
129 inline static void md_cacheflush(void *addr, int nbytes)
131 cacheflush(addr, nbytes, BCACHE);
135 /* md_icacheflush **************************************************************
137 Calls the system's function to flush the instruction cache.
139 *******************************************************************************/
141 inline static void md_icacheflush(void *addr, int nbytes)
143 cacheflush(addr, nbytes, ICACHE);
147 /* md_dcacheflush **************************************************************
149 Calls the system's function to flush the data cache.
151 *******************************************************************************/
153 inline static void md_dcacheflush(void *addr, int nbytes)
155 cacheflush(addr, nbytes, DCACHE);
158 #endif /* _VM_JIT_MIPS_MD_H */
162 * These are local overrides for various environment variables in Emacs.
163 * Please do not remove this and leave it at the end of the file, where
164 * Emacs will automagically detect them.
165 * ---------------------------------------------------------------------
168 * indent-tabs-mode: t
172 * vim:noexpandtab:sw=4:ts=4: