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URL https://opencores.org/ocsvn/ion/ion/trunk

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  • This comparison shows the changes necessary to convert path 
    /
    from Rev 43 to Rev 44
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  •

Rev 43 → Rev 44

/ion/trunk/tools/slite/src/slite.c
58,21 → 58,27
typedef struct s_block {
uint32_t start;
uint32_t size;
uint32_t mask;
uint8_t *mem;
char *name;
} t_block;
 
 
/* Here's where we define the memory areas (blocks) of the system */
/* (make sure they don't overlap or the simulated program will crash) */
/* Here's where we define the memory areas (blocks) of the system.
Memory decoding is done in the order the blocks are defined; the address
is anded with field .mask and then compared to field .start. If they match
the address modulo the field .size is used to index the memory block, giving
a 'mirror' effect. All of this simulates the behavior of the actual hardware.
Make sure the blocks don't overlap or the scheme will fail.
*/
 
#define NUM_MEM_BLOCKS (2)
 
t_block default_blocks[NUM_MEM_BLOCKS] = {
/* meant as bootstrap block, though it's read/write */
{VECTOR_RESET, 0x00010000, NULL, "ROM"},
{VECTOR_RESET, 0x00010000, 0xf0000000, NULL, "Boot"},
/* main ram block */
{0x80000000, 0x00010000, NULL, "Data"}
{0x80000000, 0x00001000, 0xf0000000, NULL, "Data"}
};
 
 
252,7 → 258,7
 
/* CPU model */
void free_cpu(t_state *s);
void init_cpu(t_state *s);
int init_cpu(t_state *s);
void reset_cpu(t_state *s);
 
/* Hardware simulation */
316,9 → 322,9
/* point ptr to the byte in the block, or NULL is the address is unmapped */
ptr = 0;
for(i=0;i<NUM_MEM_BLOCKS;i++){
if(address >= s->blocks[i].start &&
address < s->blocks[i].start + s->blocks[i].size){
ptr = (unsigned)(s->blocks[i].mem) + address - s->blocks[i].start;
if((address & s->blocks[i].mask) == s->blocks[i].start){
ptr = (unsigned)(s->blocks[i].mem) +
((address - s->blocks[i].start) % s->blocks[i].size);
break;
}
}
452,9 → 458,9
}
ptr = 0;
for(i=0;i<NUM_MEM_BLOCKS;i++){
if(address >= s->blocks[i].start &&
address < s->blocks[i].start + s->blocks[i].size){
ptr = (unsigned)(s->blocks[i].mem) + address - s->blocks[i].start;
if((address & s->blocks[i].mask) == s->blocks[i].start){
ptr = (unsigned)(s->blocks[i].mem) +
((address - s->blocks[i].start) % s->blocks[i].size);
break;
}
}
950,34 → 956,18
/** Read binary code and data files */
int read_program(t_state *s, uint32_t num_files, char **file_names){
FILE *in;
uint32_t bytes, i, j, files_read=0;
uint32_t bytes, i, files_read=0;
 
for(i=0;i<NUM_MEM_BLOCKS;i++){
if(i<num_files){
in = fopen(file_names[i], "rb");
if(in == NULL){
for(j=0;j<i;j++){
free(s->blocks[j].mem);
}
free_cpu(s);
printf("Can't open file %s, quitting!\n",file_names[i]);
getch();
return(2);
}
 
s->blocks[i].mem = (unsigned char*)malloc(s->blocks[i].size);
 
if(s->blocks[i].mem == NULL){
for(j=0;j<i;j++){
free(s->blocks[j].mem);
}
printf("Can't allocate %d bytes, quitting!\n",
s->blocks[i].size);
getch();
return(2);
}
 
memset(s->blocks[i].mem, 0, s->blocks[i].size);
 
bytes = fread(s->blocks[i].mem, 1, s->blocks[i].size, in);
fclose(in);
printf("%-16s [size= %6d, start= 0x%08x]\n",
992,25 → 982,12
}
 
if(!files_read){
free_cpu(s);
printf("No binary object files read, quitting\n");
return 0;
}
else{
for(i=files_read;i<NUM_MEM_BLOCKS;i++){
s->blocks[i].mem = (unsigned char*)malloc(s->blocks[i].size);
 
if(s->blocks[i].mem == NULL){
for(j=0;j<i;j++){
free(s->blocks[j].mem);
}
printf("Can't allocate %d bytes, quitting!\n",
s->blocks[i].size);
getch();
return(2);
}
}
}
 
return 0;
return files_read;
}
 
/*----------------------------------------------------------------------------*/
1019,7 → 996,11
t_state state, *s=&state;
 
printf("MIPS-I emulator\n");
init_cpu(s);
if(!init_cpu(s)){
printf("Trouble allocating memory, quitting!\n");
getch();
return 1;
};
 
/* do a minimal check on args */
if(argc==3 || argc==2){
1031,7 → 1012,7
return 0;
}
 
if(read_program(s, argc-1, &(argv[1]))){
if(!read_program(s, argc-1, &(argv[1]))){
return 2;
}
 
1172,8 → 1153,9
s->failed_assertions = 0; /* no failed assertions pending */
}
 
void init_cpu(t_state *s){
int i;
int init_cpu(t_state *s){
int i, j;
 
memset(s, 0, sizeof(t_state));
s->big_endian = 1;
for(i=0;i<NUM_MEM_BLOCKS;i++){
1180,6 → 1162,17
s->blocks[i].start = default_blocks[i].start;
s->blocks[i].size = default_blocks[i].size;
s->blocks[i].name = default_blocks[i].name;
s->blocks[i].mem = NULL;
s->blocks[i].mask = default_blocks[i].mask;
 
s->blocks[i].mem = (unsigned char*)malloc(s->blocks[i].size);
 
if(s->blocks[i].mem == NULL){
for(j=0;j<i;j++){
free(s->blocks[j].mem);
}
return 0;
}
memset(s->blocks[i].mem, 0, s->blocks[i].size);
}
return NUM_MEM_BLOCKS;
}

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