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hatari 2.1.0

/*
	DSP M56001 emulation
	Instructions interpreter, execution thread

	(C) 2003-2008 ARAnyM developer team

	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.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software Foundation,
	51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
*/

#ifndef DSP_CPU_H
#define DSP_CPU_H

#ifdef __cplusplus
extern "C" {
#endif

/* Defines */
#define BITMASK(x)	((1<<(x))-1)

#define DSP_OMR_MA	0x00
#define DSP_OMR_MB	0x01
#define DSP_OMR_DE	0x02
#define DSP_OMR_SD	0x06
#define DSP_OMR_EA	0x07

#define DSP_SR_C	0x00
#define DSP_SR_V	0x01
#define DSP_SR_Z	0x02
#define DSP_SR_N	0x03
#define DSP_SR_U	0x04
#define DSP_SR_E	0x05
#define DSP_SR_L	0x06

#define DSP_SR_I0	0x08
#define DSP_SR_I1	0x09
#define DSP_SR_S0	0x0a
#define DSP_SR_S1	0x0b
#define DSP_SR_T	0x0d
#define DSP_SR_LF	0x0f

#define DSP_SP_SE	0x04
#define DSP_SP_UF	0x05

/* Registers numbers in dsp.registers[] */
#define DSP_REG_X0	0x04
#define DSP_REG_X1	0x05
#define DSP_REG_Y0	0x06
#define DSP_REG_Y1	0x07
#define DSP_REG_A0	0x08
#define DSP_REG_B0	0x09
#define DSP_REG_A2	0x0a
#define DSP_REG_B2	0x0b
#define DSP_REG_A1	0x0c
#define DSP_REG_B1	0x0d
#define DSP_REG_A	0x0e
#define DSP_REG_B	0x0f

#define DSP_REG_R0	0x10
#define DSP_REG_R1	0x11
#define DSP_REG_R2	0x12
#define DSP_REG_R3	0x13
#define DSP_REG_R4	0x14
#define DSP_REG_R5	0x15
#define DSP_REG_R6	0x16
#define DSP_REG_R7	0x17

#define DSP_REG_N0	0x18
#define DSP_REG_N1	0x19
#define DSP_REG_N2	0x1a
#define DSP_REG_N3	0x1b
#define DSP_REG_N4	0x1c
#define DSP_REG_N5	0x1d
#define DSP_REG_N6	0x1e
#define DSP_REG_N7	0x1f

#define DSP_REG_M0	0x20
#define DSP_REG_M1	0x21
#define DSP_REG_M2	0x22
#define DSP_REG_M3	0x23
#define DSP_REG_M4	0x24
#define DSP_REG_M5	0x25
#define DSP_REG_M6	0x26
#define DSP_REG_M7	0x27

#define DSP_REG_SR	0x39
#define DSP_REG_OMR	0x3a
#define DSP_REG_SP	0x3b
#define DSP_REG_SSH	0x3c
#define DSP_REG_SSL	0x3d
#define DSP_REG_LA	0x3e
#define DSP_REG_LC	0x3f

#define DSP_REG_NULL	0x00
#define DSP_REG_LCSAVE	0x30

/* Memory spaces for dsp.ram[], dsp.rom[] */
#define DSP_SPACE_X	0x00
#define DSP_SPACE_Y	0x01
#define DSP_SPACE_P	0x02

/* Functions */
extern void dsp56k_init_cpu(void);		/* Set dsp_core to use */
extern void dsp56k_execute_instruction(void);	/* Execute 1 instruction */
extern Uint16 dsp56k_execute_one_disasm_instruction(FILE *out, Uint16 pc);	/* Execute 1 instruction in disasm mode */

/* Interrupt relative functions */
void dsp_add_interrupt(Uint16 inter);

#ifdef __cplusplus
}
#endif

#endif	/* DSP_CPU_H */

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