From f40bfc9267b13b54e6379dfe7539447662879d24 Mon Sep 17 00:00:00 2001
From: Sean Bartell <wingedtachikoma@gmail.com>
Date: Sat, 25 Jun 2011 21:32:25 -0400
Subject: Add codecs to librbcodec.
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Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>
---
 lib/rbcodec/codecs/libgme/hes_cpu.c | 121 ++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 lib/rbcodec/codecs/libgme/hes_cpu.c

(limited to 'lib/rbcodec/codecs/libgme/hes_cpu.c')

diff --git a/lib/rbcodec/codecs/libgme/hes_cpu.c b/lib/rbcodec/codecs/libgme/hes_cpu.c
new file mode 100644
index 0000000000..6b833b3b98
--- /dev/null
+++ b/lib/rbcodec/codecs/libgme/hes_cpu.c
@@ -0,0 +1,121 @@
+// Game_Music_Emu 0.5.2. http://www.slack.net/~ant/
+
+#include "hes_emu.h"
+
+#include "blargg_endian.h"
+
+//#include "hes_cpu_log.h"
+
+/* Copyright (C) 2003-2006 Shay Green. This module is free software; you
+can redistribute it and/or modify it under the terms of the GNU Lesser
+General Public License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version. This
+module 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 Lesser General Public License for more
+details. You should have received a copy of the GNU Lesser General Public
+License along with this module; if not, write to the Free Software Foundation,
+Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
+
+#include "blargg_source.h"
+#define PAGE HES_CPU_PAGE
+
+int read_mem( struct Hes_Emu* this, hes_addr_t addr )
+{
+	check( addr < 0x10000 );
+	int result = *Cpu_get_code( &this->cpu, addr );
+	if ( this->cpu.mmr [PAGE( addr )] == 0xFF )
+		result = read_mem_( this, addr );
+	return result;
+}
+
+void write_mem( struct Hes_Emu* this, hes_addr_t addr, int data )
+{
+	check( addr < 0x10000 );
+	byte* out = this->write_pages [PAGE( addr )];
+	if ( out )
+		out [addr & (page_size - 1)] = data;
+	else if ( this->cpu.mmr [PAGE( addr )] == 0xFF )
+		write_mem_( this, addr, data );
+}
+
+void set_mmr( struct Hes_Emu* this, int page, int bank )
+{
+	this->write_pages [page] = 0;
+	byte* data = Rom_at_addr( &this->rom, bank * page_size );
+	if ( bank >= 0x80 )
+	{
+		data = 0;
+		switch ( bank )
+		{
+		case 0xF8:
+			data = this->ram;
+			break;
+		
+		case 0xF9:
+		case 0xFA:
+		case 0xFB:
+			data = &this->sgx [(bank - 0xF9) * page_size];
+			break;
+		
+		default:
+			/* if ( bank != 0xFF )
+				dprintf( "Unmapped bank $%02X\n", bank ); */
+			data = this->rom.unmapped;
+			goto end;
+		}
+		
+		this->write_pages [page] = data;
+	}
+end:
+	Cpu_set_mmr( &this->cpu, page, bank, data );
+}
+
+#define READ_FAST( addr, out ) \
+{\
+	out = READ_CODE( addr );\
+	if ( cpu->mmr [PAGE( addr )] == 0xFF )\
+	{\
+		FLUSH_TIME();\
+		out = read_mem_( this, addr );\
+		CACHE_TIME();\
+	}\
+}
+
+#define WRITE_FAST( addr, data ) \
+{\
+	int page = PAGE( addr );\
+	byte* out = this->write_pages [page];\
+	addr &= page_size - 1;\
+	if ( out )\
+	{\
+		out [addr] = data;\
+	}\
+	else if ( cpu->mmr [page] == 0xFF )\
+	{\
+		FLUSH_TIME();\
+		write_mem_( this, addr, data );\
+		CACHE_TIME();\
+	}\
+}
+
+#define READ_LOW(  addr )           (this->ram [addr])
+#define WRITE_LOW( addr, data )     (this->ram [addr] = data)
+#define READ_MEM(  addr )           read_mem(  this, addr )
+#define WRITE_MEM( addr, data )     write_mem( this, addr, data )
+#define WRITE_VDP( addr, data )     write_vdp( this, addr, data )
+#define CPU_DONE( result_out )      { FLUSH_TIME(); result_out = cpu_done( this ); CACHE_TIME(); }
+#define SET_MMR( reg, bank )        set_mmr( this, reg, bank )
+
+#define IDLE_ADDR   idle_addr
+
+#define CPU_BEGIN \
+bool run_cpu( struct Hes_Emu* this, hes_time_t end_time )\
+{\
+	struct Hes_Cpu* cpu = &this->cpu;\
+	Cpu_set_end_time( cpu, end_time );
+	
+	#include "hes_cpu_run.h"
+	
+	return illegal_encountered;
+}
-- 
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