Print to Device Console instead of JavaScript Console

riscv_cpu.c

@@ -33,6 +33,8 @@
 #include "iomem.h"
 #include "riscv_cpu.h"
 
+void print_console(void *machine0, const char *buf, int len);
+
 #ifndef MAX_XLEN
 #error MAX_XLEN must be defined
 #endif
@@ -471,9 +473,13 @@ int target_write_slow(RISCVCPUState *s, target_ulong addr,
         if (!pr) {
             //// Begin Test: Intercept Memory-Mapped I/O
             switch(paddr & 0xfffffffffffful) {  // TODO: Why does NuttX write to 0x4000000030002088?
-            case 0x30002088:  // uart_fifo_wdata: UART Output
-                putchar(val); break;  // Print the character
-
+            case 0x30002088: { // uart_fifo_wdata: UART Output
+                // Print the character
+                char buf[1];
+                buf[0] = val;
+                print_console(NULL, buf, 1);
+                break;
+            }
             default:  // Unknown Memory-Mapped I/O
 #ifdef DUMP_INVALID_MEM_ACCESS
                 printf("target_write_slow: invalid physical address 0x");

riscv_machine.c

@@ -956,6 +956,11 @@ static VirtMachine *riscv_machine_init(const VirtMachineParams *p)
 
     /* virtio console */
     if (p->console) {
+        //// Begin Test: Save the Console
+        const char *msg = "TinyEMU Emulator for Ox64 BL808 RISC-V SBC\r\n";
+        void print_console(RISCVMachine *machine0, const char *buf, int len);
+        print_console(s, msg, strlen(msg));
+        //// End Test
         vbus->irq = &s->plic_irq[irq_num];
         s->common.console_dev = virtio_console_init(vbus, p->console);
         vbus->addr += VIRTIO_SIZE;
@@ -1119,3 +1124,15 @@ const VirtMachineClass riscv_machine_class = {
     riscv_vm_send_mouse_event,
     riscv_vm_send_key_event,
 };
+
+//// Begin Test: Print to Console
+void print_console(RISCVMachine *machine0, const char *buf, int len) {
+    static RISCVMachine *machine = NULL;
+    if (machine0 != NULL) { machine = machine0; }
+    if (machine == NULL) { puts("print_console: machine is null"); return; }
+    machine->common.console->write_data(
+        machine->common.console->opaque,
+        (const uint8_t *)buf, 
+        len);
+}
+//// End Test