created a test directory to hold test guest OSes

[palacios.git] / test / geekos_test_vm / src / geekos / serial.c

diff --git a/test/geekos_test_vm/src/geekos/serial.c b/test/geekos_test_vm/src/geekos/serial.c
new file mode 100644 (file)
index 0000000..0729501
--- /dev/null
+++ b/test/geekos_test_vm/src/geekos/serial.c
@@ -0,0 +1,178 @@
+#include <geekos/serial.h>
+#include <geekos/reboot.h>
+#include <geekos/gdt.h>
+#include <geekos/idt.h>
+
+
+
+
+unsigned short serial_io_addr = 0;
+
+
+static void Serial_Interrupt_Handler(struct Interrupt_State * state) {
+  char rcv_byte;
+  char irq_id;
+
+  Begin_IRQ(state);
+
+  irq_id = In_Byte(serial_io_addr + 2);
+
+
+  if ((irq_id & 0x04) != 0) {
+    rcv_byte = In_Byte(serial_io_addr + 0);
+
+    if (rcv_byte == 'k') {
+      SerialPrint("Restarting Machine\r\n");
+      machine_real_restart();
+    } else if (rcv_byte=='d') { 
+      SerialPrint("Dumping Machine State\n");
+      Dump_Interrupt_State(state);
+      DumpIDT();
+      DumpGDT();
+    }
+      
+#if 0
+      SerialPrint("Unreserved serial byte: %d (%c)\r\n", rcv_byte, rcv_byte);
+#endif
+  }
+  End_IRQ(state);
+}
+
+
+void InitSerialAddr(unsigned short io_addr) {
+  serial_io_addr = io_addr;
+
+  Print("Initializing Polled Serial Output on COM1 - 115200 N81 noflow\n");
+  //  io_adr = 0x3F8;  /* 3F8=COM1, 2F8=COM2, 3E8=COM3, 2E8=COM4 */
+  Out_Byte(io_addr + 3, 0x80);
+  // 115200 /* 115200 / 12 = 9600 baud */
+  Out_Byte(io_addr + 0, 1);
+  Out_Byte(io_addr + 1, 0);
+  /* 8N1 */
+  Out_Byte(io_addr + 3, 0x03);
+  /* all interrupts disabled */
+  //  Out_Byte(io_addr + 1, 0);
+  Out_Byte(io_addr + 1, 0x01);
+  /* turn off FIFO, if any */
+  Out_Byte(io_addr + 2, 0);
+  /* loopback off, interrupts (Out2) off, Out1/RTS/DTR off */
+  //  Out_Byte(io_addr + 4, 0);
+  // enable interrupts (bit 3)
+  Out_Byte(io_addr + 4, 0x08);
+}
+
+
+inline static void SerialPutChar(unsigned char c) {
+ 
+ //  static unsigned short io_adr;
+  if (serial_io_addr==0) { 
+    return;
+  }
+
+
+  if (c=='\n') { 
+    /* wait for transmitter ready */
+    while((In_Byte(serial_io_addr + 5) & 0x40) == 0) {
+    }
+    /* send char */
+    Out_Byte(serial_io_addr + 0, '\r');
+    /* wait for transmitter ready */
+  }
+  while((In_Byte(serial_io_addr + 5) & 0x40) == 0) {
+  }
+  /* send char */
+  Out_Byte(serial_io_addr + 0, c);
+}
+
+
+
+void SerialPutLineN(char * line, int len) {
+  int i;
+  for (i = 0; i < len && line[i] != 0; i++) { 
+    SerialPutChar(line[i]); 
+  }
+}
+
+
+void SerialPutLine(char * line) {
+  int i;
+  for (i = 0; line[i]!= 0; i++) { 
+    SerialPutChar(line[i]); 
+  }
+}
+
+
+void SerialPrintHex(unsigned char x)
+{
+  unsigned char z;
+  
+  z = (x>>4) & 0xf ;
+  SerialPrint("%x", z);
+  z = x & 0xf;
+  SerialPrint("%x", z);
+}
+
+void SerialMemDump(unsigned char *start, int n)
+{
+  int i, j;
+
+  for (i=0;i<n;i+=16) {
+    SerialPrint("%8x", (unsigned)(start+i));
+    for (j=i; j<i+16 && j<n; j+=2) {
+      SerialPrint(" ");
+      SerialPrintHex(*((unsigned char *)(start+j)));
+      if ((j+1)<n) { 
+       SerialPrintHex(*((unsigned char *)(start+j+1)));
+      }
+    }
+    SerialPrint(" ");
+    for (j=i; j<i+16 && j<n;j++) {
+      SerialPrint("%c", ((start[j]>=32) && (start[j]<=126)) ? start[j] : '.');
+    }
+    SerialPrint("\n");
+  }
+}
+
+
+static struct Output_Sink serial_output_sink;
+static void Serial_Emit(struct Output_Sink * o, int ch) { 
+  SerialPutChar((unsigned char)ch); 
+}
+static void Serial_Finish(struct Output_Sink * o) { return; }
+
+
+static void __inline__ SerialPrintInternal(const char * format, va_list ap) {
+  Format_Output(&serial_output_sink, format, ap);
+}
+
+
+void SerialPrint(const char * format, ...) {
+  va_list args;
+  bool iflag = Begin_Int_Atomic();
+
+  va_start(args, format);
+  SerialPrintInternal(format, args);
+  va_end(args);
+
+  End_Int_Atomic(iflag);
+}
+
+void SerialPrintList(const char * format, va_list ap) {
+  bool iflag = Begin_Int_Atomic();
+  SerialPrintInternal(format, ap);
+  End_Int_Atomic(iflag);
+
+}
+
+
+
+void InitSerial() {
+  Print("Initialzing Serial\n");
+
+  serial_output_sink.Emit = &Serial_Emit;
+  serial_output_sink.Finish = &Serial_Finish;
+
+  Install_IRQ(COM1_IRQ, Serial_Interrupt_Handler);
+  Enable_IRQ(COM1_IRQ);
+  InitSerialAddr(DEFAULT_SERIAL_ADDR);
+}