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uvm32 initial version

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Toby Jaffey 2025-12-06 16:44:23 +00:00
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emulator-parallel/emulator-parallel.c Normal file
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "uvm32.h"
#include "../common/uvm32_common_custom.h"
// Run multiple scheduled VMs in parallel until all have ended
#define NUM_VM 4 // number of vms
#define SCHEDULE SCHEDULE_RANDOM // scheduling algorithm
// scheduling algorithms
#define SCHEDULE_ROUNDROBIN() scheduler_index = (scheduler_index + 1) % NUM_VM
#define SCHEDULE_RANDOM() scheduler_index = rand()%NUM_VM
// Precompiled binary program to print integers
// This code expects to print via CSR 0x13C (IOREQ_PRINTD in common/uvm32_common_custom.h)
uint8_t rom[] = {
0x23, 0x26, 0x11, 0x00, 0xef, 0x00, 0x00, 0x01, 0x73, 0x50, 0x80, 0x13,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x93, 0x07, 0x00, 0x00,
0x13, 0x07, 0xa0, 0x00, 0x73, 0x90, 0xc7, 0x13, 0x93, 0x87, 0x17, 0x00,
0xe3, 0x9c, 0xe7, 0xfe, 0x67, 0x80, 0x00, 0x00
};
// Create an identifier for our host handler
typedef enum {
F_PRINTD,
} f_code_t;
// Map VM ioreq IOREQ_PRINTD to F_PRINTD, tell VM to expect write of a U32
const uvm32_mapping_t env[] = {
{ .csr = IOREQ_PRINTD, .typ = IOREQ_TYP_U32_WR, .code = F_PRINTD },
};
int main(int argc, char *argv[]) {
uvm32_state_t vmst[NUM_VM];
uvm32_evt_t evt;
int numVmRunning = NUM_VM;
int scheduler_index = 0;
for (int i=0;i<NUM_VM;i++) {
uvm32_init(&vmst[i], env, sizeof(env) / sizeof(env[0]));
uvm32_load(&vmst[i], rom, sizeof(rom));
}
while(numVmRunning > 0) {
if (uvm32_hasEnded(&vmst[scheduler_index])) {
// this vm has already completed, pick another
SCHEDULE();
continue;
}
uvm32_run(&vmst[scheduler_index], &evt, 100); // num instructions before vm considered hung
switch(evt.typ) {
case UVM32_EVT_END:
printf("[VM %d ended]\n", scheduler_index);
numVmRunning--;
break;
case UVM32_EVT_IOREQ: // vm has paused to handle IOREQ
switch((f_code_t)evt.data.ioreq.code) {
case F_PRINTD:
// Type of F_PRINTD is IOREQ_TYP_U32_WR, so expect value in evt.data.ioreq.val.u32
printf("[VM %d]: %d\n", scheduler_index, evt.data.ioreq.val.u32);
break;
}
break;
default:
break;
}
SCHEDULE();
}
return 0;
}