lxdream.org :: lxdream/src/aica/armmem.c r11:0a82ef380c45

tree revision 12:7748fcf320b9

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     1 #include <stdlib.h>

     2 #include "dream.h"

     3 #include "mem.h"

     5 char *arm_mem = NULL;

     7 void arm_mem_init() {

     8     arm_mem = mem_get_region_by_name( MEM_REGION_AUDIO );

    10 }

    12 int32_t arm_read_long( uint32_t addr ) {

    13     if( addr < 0x00200000 ) {

    14 	return *(int32_t *)(arm_mem + addr);

    15 	/* Main sound ram */

    16     } else if( addr >= 0x00800000 && addr <= 0x00803000 ) {

    17 	/* Sound registers / scratch ram */

    18     } else {

    19 	/* Undefined memory */

    20 	ERROR( "Attempted long read to undefined page: %08X",

    21 	       addr );

    22 	return 0;

    23     }

    24 }

    26 int16_t arm_read_word( uint32_t addr ) {

    27     if( addr < 0x00200000 ) {

    28 	return *(int16_t *)(arm_mem + addr);

    29 	/* Main sound ram */

    30     } else {

    31 	/* Undefined memory */

    32 	ERROR( "Attempted word read to undefined page: %08X",

    33 	       addr );

    34 	return 0;

    35     }

    37 }

    39 int8_t arm_read_byte( uint32_t addr ) {

    40     if( addr < 0x00200000 ) {

    41 	return *(int8_t *)(arm_mem + addr);

    42 	/* Main sound ram */

    43     } else {

    44 	/* Undefined memory */

    45 	ERROR( "Attempted byte read to undefined page: %08X",

    46 	       addr );

    47 	return 0;

    48     }

    49 }

    51 uint32_t arm_read_long_user( uint32_t addr ) {

    53 }

    55 uint32_t arm_read_byte_user( uint32_t addr ) {

    57 }