--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/sh4/sh4trans.c	Thu Aug 23 12:33:27 2007 +0000
@@ -0,0 +1,105 @@
+/**
+ * $Id: sh4trans.c,v 1.1 2007-08-23 12:33:27 nkeynes Exp $
+ * 
+ * SH4 translation core module. This part handles the non-target-specific
+ * section of the translation.
+ *
+ * Copyright (c) 2005 Nathan Keynes.
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "sh4core.h"
+#include "sh4trans.h"
+#include "xltcache.h"
+
+/**
+ * Execute a timeslice using translated code only (ie translate/execute loop)
+ * Note this version does not support breakpoints
+ */
+uint32_t sh4_xlat_run_slice( uint32_t nanosecs ) 
+{
+    int i, result = 1;
+    sh4r.slice_cycle = 0;
+
+    if( sh4r.sh4_state != SH4_STATE_RUNNING ) {
+	if( sh4r.event_pending < nanosecs ) {
+	    sh4r.sh4_state = SH4_STATE_RUNNING;
+	    sh4r.slice_cycle = sh4r.event_pending;
+	}
+    }
+
+    for( ; sh4r.slice_cycle < nanosecs && result != 0; sh4r.slice_cycle ) {
+	if( SH4_EVENT_PENDING() ) {
+	    if( sh4r.event_types & PENDING_EVENT ) {
+		event_execute();
+	    }
+	    /* Eventq execute may (quite likely) deliver an immediate IRQ */
+	    if( sh4r.event_types & PENDING_IRQ ) {
+		sh4_accept_interrupt();
+	    }
+	}
+
+	int (*code)() = xlat_get_code(sh4r.pc);
+	if( code == NULL ) {
+	    code = sh4_translate_basic_block( sh4r.pc );
+	}
+	result = code();
+	sh4r.slice_cycle += result;
+    }
+
+    /* If we aborted early, but the cpu is still technically running,
+     * we're doing a hard abort - cut the timeslice back to what we
+     * actually executed
+     */
+    if( sh4r.slice_cycle < nanosecs && sh4r.sh4_state == SH4_STATE_RUNNING ) {
+	nanosecs = sh4r.slice_cycle;
+    }
+    if( sh4r.sh4_state != SH4_STATE_STANDBY ) {
+	TMU_run_slice( nanosecs );
+	SCIF_run_slice( nanosecs );
+    }
+    return nanosecs;
+}
+
+uint8_t *xlat_output;
+
+/**
+ * Translate a linear basic block, ie all instructions from the start address
+ * (inclusive) until the next branch/jump instruction or the end of the page
+ * is reached.
+ * @return the address of the translated block
+ * eg due to lack of buffer space.
+ */
+void * sh4_translate_basic_block( sh4addr_t start )
+{
+    uint32_t pc = start;
+    int done;
+    xlat_cache_block_t block = xlat_start_block( start );
+    xlat_output = (uint8_t *)block->code;
+    uint8_t *eob = xlat_output + block->size;
+    sh4_translate_begin_block();
+
+    while( (done = sh4_x86_translate_instruction( pc )) == 0 ) {
+	if( eob - xlat_output < MAX_INSTRUCTION_SIZE ) {
+	    uint8_t *oldstart = block->code;
+	    block = xlat_extend_block();
+	    xlat_output = block->code + (xlat_output - oldstart);
+	    eob = block->code + block->size;
+	}
+	pc += 2;
+    }
+    sh4_translate_end_block(done);
+    xlat_commit_block( xlat_output - block->size, pc-start );
+    return block->code;
+}
+
+