lot of changes

[palacios.git] / palacios / src / geekos / vmm_stubs.c

diff --git a/palacios/src/geekos/vmm_stubs.c b/palacios/src/geekos/vmm_stubs.c
index aae2376..c83e6d5 100644 (file)
--- a/palacios/src/geekos/vmm_stubs.c
+++ b/palacios/src/geekos/vmm_stubs.c
@@ -1,6 +1,36 @@
 #include <geekos/vmm_stubs.h>
 #include <geekos/serial.h>
 #include <palacios/vm_guest.h>
+#include <geekos/debug.h>
+
+
+
+static inline void VM_Out_Byte(ushort_t port, uchar_t value)
+{
+    __asm__ __volatile__ (
+       "outb %b0, %w1"
+       :
+       : "a" (value), "Nd" (port)
+    );
+}
+
+/*
+ * Read a byte from an I/O port.
+ */
+static inline uchar_t VM_In_Byte(ushort_t port)
+{
+    uchar_t value;
+
+    __asm__ __volatile__ (
+       "inb %w1, %b0"
+       : "=a" (value)
+       : "Nd" (port)
+    );
+
+    return value;
+}
+
+
 
 
 void * Identity(void *addr) { return addr; };
@@ -55,7 +85,7 @@ static void pic_intr_handler(struct Interrupt_State * state) {
   SerialPrint("Interrupt %d (IRQ=%d)\n", state->intNum, state->intNum - 32);
 
   if (info) {
-    info->vm_ops.raise_irq(info, state->intNum - 32, state->errorCode);
+    info->vm_ops.raise_irq(info, state->intNum - 32);
   } else {
     SerialPrint("Interrupt handler error: NULL pointer found, no action taken\n");
     End_IRQ(state);
@@ -91,3 +121,82 @@ int ack_irq(int irq) {
 void Init_Stubs() {
   memset(irq_map, 0, sizeof(struct guest_info *) * 256);
 }
+
+
+unsigned int get_cpu_khz() {
+  extern uint_t cpu_khz_freq;
+
+  unsigned long  print_khz = (unsigned long)(cpu_khz_freq & 0xffffffff);
+  
+  PrintBoth("Detected %lu.%lu MHz CPU\n", print_khz / 1000, print_khz % 1000);
+
+  return cpu_khz_freq;
+}
+
+
+
+
+#if 0
+
+
+/* ------ Calibrate the TSC ------- 
+ * Return processor ticks per second / CALIBRATE_FRAC.
+ *
+ * Ported From Xen
+ */
+#define PIT_MODE 0x43
+#define PIT_CH2 0x42
+#define CLOCK_TICK_RATE 1193180 /* system crystal frequency (Hz) */
+#define CALIBRATE_FRAC  20      /* calibrate over 50ms */
+#define CALIBRATE_LATCH ((CLOCK_TICK_RATE+(CALIBRATE_FRAC/2))/CALIBRATE_FRAC)
+
+
+unsigned long long get_cpu_khz() {
+    ullong_t start, end;
+    unsigned long count;
+    unsigned long long tmp;
+    unsigned long print_tmp; 
+
+    /* Set the Gate high, disable speaker */
+    VM_Out_Byte((VM_In_Byte(0x61) & ~0x02) | 0x01, 0x61);
+
+    /*
+     * Now let's take care of CTC channel 2
+     *
+     * Set the Gate high, program CTC channel 2 for mode 0, (interrupt on
+     * terminal count mode), binary count, load 5 * LATCH count, (LSB and MSB)
+     * to begin countdown.
+     */
+    VM_Out_Byte(0xb0, PIT_MODE);           /* binary, mode 0, LSB/MSB, Ch 2 */
+    VM_Out_Byte(CALIBRATE_LATCH & 0xff, PIT_CH2); /* LSB of count */
+    VM_Out_Byte(CALIBRATE_LATCH >> 8, PIT_CH2);   /* MSB of count */
+
+    rdtscll(start);
+    for ( count = 0; (VM_In_Byte(0x61) & 0x20) == 0; count++ )
+        continue;
+    rdtscll(end);
+
+    /* Error if the CTC doesn't behave itself. */
+    if ( count == 0 ) {
+     PrintBoth("CPU Frequency Calibration Error\n");
+      return 0;
+    }
+
+    tmp = ((end - start) * (ullong_t)CALIBRATE_FRAC);
+
+    do_div(tmp, 1000);
+
+    tmp &= 0xffffffff;
+    print_tmp = (unsigned long)tmp;
+
+   PrintBoth("Detected %lu.%lu MHz CPU\n", print_tmp / 1000, print_tmp % 1000);
+    return tmp;
+}
+
+#undef PIT_CH2
+#undef PIT_MODE
+#undef CLOCK_TICK_RATE
+#undef CALIBRATE_FRAC  
+#undef CALIBRATE_LATCH 
+
+#endif