mister-devel/ao486_MiSTer
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ao486_MiSTer/sim/sim_pc/main.cpp
sorgelig 43a20047d5 Initial port.
2017-08-03 21:35:47 +08:00

368 lines
15 KiB
C++
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#include <cstdio>
#include <cstring>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "shared_mem.h"
volatile shared_mem_t *shared_ptr = NULL;
int load_file(const char *name, int byte_location) {
FILE *fp = fopen(name, "rb");
if(fp == NULL) {
return -1;
}
int int_ret = fseek(fp, 0, SEEK_END);
if(int_ret != 0) {
fclose(fp);
return -2;
}
long size = ftell(fp);
rewind(fp);
int_ret = fread((void *)&shared_ptr->mem.bytes[byte_location], size, 1, fp);
if(int_ret != 1) {
fclose(fp);
return -3;
}
fclose(fp);
return 0;
}
int main(int argc, char **argv) {
int int_ret;
//open file with truncate
FILE *fp = fopen("shared_mem.dat", "wb");
if(fp == NULL) {
perror("Can not truncate file shared_mem.dat");
return -1;
}
uint8 *buf = new uint8[sizeof(shared_mem_t)];
memset(buf, 0, sizeof(shared_mem_t));
int_ret = fwrite(buf, sizeof(shared_mem_t), 1, fp);
delete buf;
if(int_ret != 1) {
perror("Can not zero-fill file shared_mem.dat");
fclose(fp);
return -2;
}
fclose(fp);
int fd = open("shared_mem.dat", O_RDWR, S_IRUSR | S_IWUSR);
if(fd == -1) {
perror("open() failed for shared_mem.dat");
return -1;
}
shared_ptr = (shared_mem_t *)mmap(NULL, sizeof(shared_mem_t), PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if(shared_ptr == MAP_FAILED) {
perror("mmap() failed");
close(fd);
return -2;
}
//load bios
int_ret = load_file("./../../sd/bios/bochs_legacy", 0xF0000);
if(int_ret != 0) {
perror("Can not load bios file");
return -3;
}
//load vgabios
int_ret = load_file("./../../sd/vgabios/vgabios_lgpl", 0xC0000);
if(int_ret != 0) {
perror("Can not load bios file");
return -3;
}
//--------------------------------------------------------------------------
/*
while(true) {
if(shared_ptr->bochs486_pc.starting == STEP_REQ) {
printf("Starting bochs486_pc.\n");
shared_ptr->bochs486_pc.starting = STEP_ACK;
break;
}
}
*/
while(true) {
if(shared_ptr->ao486.starting == STEP_REQ) {
printf("Starting ao486.\n");
shared_ptr->ao486.starting = STEP_ACK;
break;
}
}
/*
while(true) {
if(shared_ptr->bochsDevs_starting == STEP_REQ) {
printf("Starting bochsDevs.\n");
shared_ptr->bochsDevs_starting = STEP_ACK;
break;
}
}
*/
//--------------------------------------------------------------------------
uint32 ctrl_io_read = 0;
uint32 ctrl_io_write = 0;
uint32 ctrl_mem_read = 0;
uint32 ctrl_mem_write = 0;
uint32 bochs486_pc_only = 0;
uint32 ao486_only = 1;
FILE *fp_stop = NULL;
uint32 bochs486_stopped = 0;
FILE *debug_fp = fopen("output.txt", "w");
while(true) {
//---------------------------------------------------------------------- stop control
if(bochs486_stopped == 0) {
if(fp_stop == NULL) fp_stop = fopen("ctrl_stop.do", "rb");
if(fp_stop != NULL) {
if(shared_ptr->bochs486_pc.stop == STEP_IDLE) {
shared_ptr->bochs486_pc.stop = STEP_REQ;
}
if(shared_ptr->bochs486_pc.stop == STEP_ACK) {
if(shared_ptr->bochs486_pc.instr_counter <= shared_ptr->interrupt_at_counter + 10) {
printf("Stop failed ..\n");
shared_ptr->bochs486_pc.stop = STEP_IDLE;
usleep(100000);
}
else {
printf("Stop ok.\n");
fclose(fp_stop);
fp_stop = NULL;
bochs486_stopped = 1;
}
}
}
}
if(bochs486_stopped == 1) {
if(fp_stop == NULL) fp_stop = fopen("ctrl_stop.do", "rb");
if(fp_stop != NULL) {
fclose(fp_stop);
fp_stop = NULL;
}
else {
bochs486_stopped = 0;
//wait for ack from ao486
shared_ptr->ao486.instr_counter = shared_ptr->bochs486_pc.instr_counter;
while(true) {
if(shared_ptr->ao486.starting == STEP_REQ) {
printf("Starting ao486.\n");
shared_ptr->ao486.starting = STEP_ACK;
break;
}
}
shared_ptr->bochs486_pc.stop = STEP_IDLE;
bochs486_pc_only = 0;
}
}
//---------------------------------------------------------------------- control io read
if(ctrl_io_read == 0) {
if( (bochs486_pc_only && shared_ptr->bochs486_pc.io_step == STEP_REQ && shared_ptr->bochs486_pc.io_is_write == 0) ||
(ao486_only && shared_ptr->ao486.io_step == STEP_REQ && shared_ptr->ao486.io_is_write == 0) || (
shared_ptr->ao486.io_step == STEP_REQ && shared_ptr->bochs486_pc.io_step == STEP_REQ && shared_ptr->ao486.io_is_write == 0 &&
shared_ptr->ao486.io_address == shared_ptr->bochs486_pc.io_address &&
shared_ptr->ao486.io_byteenable == shared_ptr->bochs486_pc.io_byteenable &&
shared_ptr->ao486.io_is_write == shared_ptr->bochs486_pc.io_is_write &&
shared_ptr->ao486.io_step == shared_ptr->bochs486_pc.io_step ) )
{
ctrl_io_read = 1;
shared_ptr->combined.io_address = (ao486_only)? shared_ptr->ao486.io_address : shared_ptr->bochs486_pc.io_address;
shared_ptr->combined.io_byteenable = (ao486_only)? shared_ptr->ao486.io_byteenable : shared_ptr->bochs486_pc.io_byteenable;
shared_ptr->combined.io_is_write = 0;
shared_ptr->combined.io_step = STEP_REQ;
}
}
if(ctrl_io_read == 1) {
if(shared_ptr->combined.io_address == 0x888C) {
ctrl_io_read = 0;
if(bochs486_pc_only == 0) {
shared_ptr->ao486.io_data = 0xFFFFFFFF;
shared_ptr->ao486.io_step = STEP_ACK;
}
if(ao486_only == 0) {
shared_ptr->bochs486_pc.io_data = 0xFFFFFFFF;
shared_ptr->bochs486_pc.io_step = STEP_ACK;
}
}
else if(shared_ptr->combined.io_step == STEP_ACK && shared_ptr->combined.io_is_write == 0) {
ctrl_io_read = 0;
if(bochs486_pc_only == 0) {
shared_ptr->ao486.io_data = shared_ptr->combined.io_data;
shared_ptr->ao486.io_step = STEP_ACK;
}
if(ao486_only == 0) {
shared_ptr->bochs486_pc.io_data = shared_ptr->combined.io_data;
shared_ptr->bochs486_pc.io_step = STEP_ACK;
}
}
}
//---------------------------------------------------------------------- control io write
if(ctrl_io_write == 0) {
if( (bochs486_pc_only && shared_ptr->bochs486_pc.io_step == STEP_REQ && shared_ptr->bochs486_pc.io_is_write == 1) ||
(ao486_only && shared_ptr->ao486.io_step == STEP_REQ && shared_ptr->ao486.io_is_write == 1) || (
shared_ptr->ao486.io_step == STEP_REQ && shared_ptr->bochs486_pc.io_step == STEP_REQ && shared_ptr->ao486.io_is_write == 1 &&
shared_ptr->ao486.io_address == shared_ptr->bochs486_pc.io_address &&
shared_ptr->ao486.io_data == shared_ptr->bochs486_pc.io_data &&
shared_ptr->ao486.io_byteenable == shared_ptr->bochs486_pc.io_byteenable &&
shared_ptr->ao486.io_is_write == shared_ptr->bochs486_pc.io_is_write &&
shared_ptr->ao486.io_step == shared_ptr->bochs486_pc.io_step ) )
{
ctrl_io_write = 1;
shared_ptr->combined.io_address = (ao486_only)? shared_ptr->ao486.io_address : shared_ptr->bochs486_pc.io_address;
shared_ptr->combined.io_data = (ao486_only)? shared_ptr->ao486.io_data : shared_ptr->bochs486_pc.io_data;
shared_ptr->combined.io_byteenable = (ao486_only)? shared_ptr->ao486.io_byteenable : shared_ptr->bochs486_pc.io_byteenable;
shared_ptr->combined.io_is_write = 1;
shared_ptr->combined.io_step = STEP_REQ;
}
}
if(ctrl_io_write == 1) {
if(shared_ptr->combined.io_address == 0x8888) {
fprintf(debug_fp, "%c", shared_ptr->combined.io_data & 0xFF);
fflush(debug_fp);
ctrl_io_write = 0;
if(bochs486_pc_only == 0) shared_ptr->ao486.io_step = STEP_ACK;
if(ao486_only == 0) shared_ptr->bochs486_pc.io_step = STEP_ACK;
}
else if(shared_ptr->combined.io_step == STEP_ACK && shared_ptr->combined.io_is_write == 1) {
ctrl_io_write = 0;
if(bochs486_pc_only == 0) shared_ptr->ao486.io_step = STEP_ACK;
if(ao486_only == 0) shared_ptr->bochs486_pc.io_step = STEP_ACK;
}
}
//---------------------------------------------------------------------- control mem read
if(ctrl_mem_read == 0) {
if( (bochs486_pc_only && shared_ptr->bochs486_pc.mem_step == STEP_REQ && shared_ptr->bochs486_pc.mem_is_write == 0) ||
(ao486_only && shared_ptr->ao486.mem_step == STEP_REQ && shared_ptr->ao486.mem_is_write == 0) || (
shared_ptr->ao486.mem_step == STEP_REQ && shared_ptr->bochs486_pc.mem_step == STEP_REQ && shared_ptr->ao486.mem_is_write == 0 &&
shared_ptr->ao486.mem_address == shared_ptr->bochs486_pc.mem_address &&
shared_ptr->ao486.mem_byteenable == shared_ptr->bochs486_pc.mem_byteenable &&
shared_ptr->ao486.mem_is_write == shared_ptr->bochs486_pc.mem_is_write &&
shared_ptr->ao486.mem_step == shared_ptr->bochs486_pc.mem_step ) )
{
ctrl_mem_read = 1;
shared_ptr->combined.mem_address = (ao486_only)? shared_ptr->ao486.mem_address : shared_ptr->bochs486_pc.mem_address;
shared_ptr->combined.mem_byteenable = (ao486_only)? shared_ptr->ao486.mem_byteenable : shared_ptr->bochs486_pc.mem_byteenable;
shared_ptr->combined.mem_is_write = 0;
shared_ptr->combined.mem_step = STEP_REQ;
}
}
if(ctrl_mem_read == 1) {
if(shared_ptr->combined.mem_step == STEP_ACK && shared_ptr->combined.mem_is_write == 0) {
ctrl_mem_read = 0;
if(bochs486_pc_only == 0) {
shared_ptr->ao486.mem_data = shared_ptr->combined.mem_data;
shared_ptr->ao486.mem_step = STEP_ACK;
}
if(ao486_only == 0) {
shared_ptr->bochs486_pc.mem_data = shared_ptr->combined.mem_data;
shared_ptr->bochs486_pc.mem_step = STEP_ACK;
}
}
}
//---------------------------------------------------------------------- control mem write
if(ctrl_mem_write == 0) {
if( (bochs486_pc_only && shared_ptr->bochs486_pc.mem_step == STEP_REQ && shared_ptr->bochs486_pc.mem_is_write == 1) ||
(ao486_only && shared_ptr->ao486.mem_step == STEP_REQ && shared_ptr->ao486.mem_is_write == 1) || (
shared_ptr->ao486.mem_step == STEP_REQ && shared_ptr->bochs486_pc.mem_step == STEP_REQ && shared_ptr->ao486.mem_is_write == 1 &&
shared_ptr->ao486.mem_address == shared_ptr->bochs486_pc.mem_address &&
shared_ptr->ao486.mem_data == shared_ptr->bochs486_pc.mem_data &&
shared_ptr->ao486.mem_byteenable == shared_ptr->bochs486_pc.mem_byteenable &&
shared_ptr->ao486.mem_is_write == shared_ptr->bochs486_pc.mem_is_write &&
shared_ptr->ao486.mem_step == shared_ptr->bochs486_pc.mem_step ) )
{
ctrl_mem_write = 1;
shared_ptr->combined.mem_address = (ao486_only)? shared_ptr->ao486.mem_address : shared_ptr->bochs486_pc.mem_address;
shared_ptr->combined.mem_data = (ao486_only)? shared_ptr->ao486.mem_data : shared_ptr->bochs486_pc.mem_data;
shared_ptr->combined.mem_byteenable = (ao486_only)? shared_ptr->ao486.mem_byteenable : shared_ptr->bochs486_pc.mem_byteenable;
shared_ptr->combined.mem_is_write = 1;
shared_ptr->combined.mem_step = STEP_REQ;
}
}
if(ctrl_mem_write == 1) {
if(shared_ptr->combined.mem_step == STEP_ACK && shared_ptr->combined.mem_is_write == 1) {
ctrl_mem_write = 0;
if(bochs486_pc_only == 0) shared_ptr->ao486.mem_step = STEP_ACK;
if(ao486_only == 0) shared_ptr->bochs486_pc.mem_step = STEP_ACK;
}
}
//---------------------------------------------------------------------- combined mem write
if(shared_ptr->combined.mem_step == STEP_REQ && shared_ptr->combined.mem_is_write) {
uint32 address = shared_ptr->combined.mem_address;
if(address < 0xA0000 || address >= 0xC0000) {
for(uint32 i=0; i<4; i++) {
if(shared_ptr->combined.mem_byteenable & 1) {
shared_ptr->mem.bytes[address + i] = shared_ptr->combined.mem_data & 0xFF;
//printf("[%08x] = %02x\n", address + i, shared_ptr->combined.mem_data & 0xFF);
}
shared_ptr->combined.mem_byteenable >>= 1;
shared_ptr->combined.mem_data >>= 8;
}
shared_ptr->combined.mem_step = STEP_ACK;
}
}
//----------------------------------------------------------------------
usleep(10);
}
munmap((void *)shared_ptr, sizeof(shared_mem_t));
close(fd);
return 0;
}
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