2 * $Id: sh4trans.c,v 1.4 2007-09-19 12:09:33 nkeynes Exp $
4 * SH4 translation core module. This part handles the non-target-specific
5 * section of the translation.
7 * Copyright (c) 2005 Nathan Keynes.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
25 * Execute a timeslice using translated code only (ie translate/execute loop)
26 * Note this version does not support breakpoints
28 uint32_t sh4_xlat_run_slice( uint32_t nanosecs )
33 if( sh4r.sh4_state != SH4_STATE_RUNNING ) {
34 if( sh4r.event_pending < nanosecs ) {
35 sh4r.sh4_state = SH4_STATE_RUNNING;
36 sh4r.slice_cycle = sh4r.event_pending;
40 while( sh4r.slice_cycle < nanosecs ) {
41 if( SH4_EVENT_PENDING() ) {
42 if( sh4r.event_types & PENDING_EVENT ) {
45 /* Eventq execute may (quite likely) deliver an immediate IRQ */
46 if( sh4r.event_types & PENDING_IRQ ) {
47 sh4_accept_interrupt();
51 if( sh4r.pc > 0xFFFFFF00 ) {
52 syscall_invoke( sh4r.pc );
53 sh4r.in_delay_slot = 0;
57 gboolean (*code)() = xlat_get_code(sh4r.pc);
59 code = sh4_translate_basic_block( sh4r.pc );
65 /* If we aborted early, but the cpu is still technically running,
66 * we're doing a hard abort - cut the timeslice back to what we
69 if( sh4r.slice_cycle < nanosecs && sh4r.sh4_state == SH4_STATE_RUNNING ) {
70 nanosecs = sh4r.slice_cycle;
72 if( sh4r.sh4_state != SH4_STATE_STANDBY ) {
73 TMU_run_slice( nanosecs );
74 SCIF_run_slice( nanosecs );
82 * Translate a linear basic block, ie all instructions from the start address
83 * (inclusive) until the next branch/jump instruction or the end of the page
85 * @return the address of the translated block
86 * eg due to lack of buffer space.
88 void * sh4_translate_basic_block( sh4addr_t start )
92 xlat_cache_block_t block = xlat_start_block( start );
93 xlat_output = (uint8_t *)block->code;
94 uint8_t *eob = xlat_output + block->size;
95 sh4_translate_begin_block();
97 while( (done = sh4_x86_translate_instruction( pc )) == 0 ) {
98 if( eob - xlat_output < MAX_INSTRUCTION_SIZE ) {
99 uint8_t *oldstart = block->code;
100 block = xlat_extend_block();
101 xlat_output = block->code + (xlat_output - oldstart);
102 eob = block->code + block->size;
107 sh4_translate_end_block(pc);
108 xlat_commit_block( xlat_output - block->code, pc-start );
113 * Translate a linear basic block to a temporary buffer, execute it, and return
114 * the result of the execution. The translation is discarded.
116 gboolean sh4_translate_and_run( sh4addr_t start )
123 uint8_t *eob = xlat_output + sizeof(buf);
125 sh4_translate_begin_block();
127 while( (done = sh4_x86_translate_instruction( pc )) == 0 ) {
128 assert( (eob - xlat_output) >= MAX_INSTRUCTION_SIZE );
132 sh4_translate_end_block(pc);
134 gboolean (*code)() = (void *)buf;
.