/*
* Keyboard driver
* Copyright (c) 2001,2004 David H. Hovemeyer <daveho@cs.umd.edu>
- * $Revision: 1.3 $
+ * $Revision: 1.4 $
*
* This is free software. You are permitted to use,
* redistribute, and modify it as specified in the file "COPYING".
#include <geekos/io.h>
#include <geekos/keyboard.h>
+
+static enum {TARGET_GEEKOS,TARGET_VMM} target=TARGET_GEEKOS;
+
+extern void deliver_key_to_vmm(uchar_t status, uchar_t scancode);
+
/* ----------------------------------------------------------------------
* Private data and functions
* ---------------------------------------------------------------------- */
*/
static void Keyboard_Interrupt_Handler(struct Interrupt_State* state)
{
+ uchar_t raw_status, raw_scancode;
+
uchar_t status, scanCode;
unsigned flag = 0;
bool release = false, shift;
Keycode keycode;
+ bool flagchange;
Begin_IRQ(state);
- // Print("Keybaord\n");
+ Print("Keyboard\n");
status = In_Byte(KB_CMD);
+
+ raw_status=status;
+
IO_Delay();
if ((status & KB_OUTPUT_FULL) != 0) {
- /* There is a byte available */
- scanCode = In_Byte(KB_DATA);
- IO_Delay();
-/*
- * Print("code=%x%s\n", scanCode, (scanCode&0x80) ? " [release]" : "");
- */
-
- if (scanCode & KB_KEY_RELEASE) {
- release = true;
- scanCode &= ~(KB_KEY_RELEASE);
- }
-
- if (scanCode >= SCAN_TABLE_SIZE) {
- Print("Unknown scan code: %x\n", scanCode);
+ /* There is a byte available */
+ scanCode = In_Byte(KB_DATA);
+ raw_scancode=scanCode;
+ Print("Keyboard: status=0x%x, scancode=0x%x\n", raw_status, raw_scancode);
+ IO_Delay();
+ /*
+ * Print("code=%x%s\n", scanCode, (scanCode&0x80) ? " [release]" : "");
+ */
+
+ if (scanCode & KB_KEY_RELEASE) {
+ release = true;
+ scanCode &= ~(KB_KEY_RELEASE);
+ }
+
+ if (scanCode >= SCAN_TABLE_SIZE) {
+ Print("Unknown scan code: %x\n", scanCode);
+ goto done;
+ }
+
+ /* Process the key */
+ shift = ((s_shiftState & SHIFT_MASK) != 0);
+ keycode = shift ? s_scanTableWithShift[scanCode] : s_scanTableNoShift[scanCode];
+
+ flagchange=false;
+
+ /* Update shift, control and alt state */
+ switch (keycode) {
+ case KEY_LSHIFT:
+ flag = LEFT_SHIFT;
+ break;
+ case KEY_RSHIFT:
+ flag = RIGHT_SHIFT;
+ break;
+ case KEY_LCTRL:
+ flag = LEFT_CTRL;
+ break;
+ case KEY_RCTRL:
+ flag = RIGHT_CTRL;
+ break;
+ case KEY_LALT:
+ flag = LEFT_ALT;
+ break;
+ case KEY_RALT:
+ flag = RIGHT_ALT;
+ break;
+ default:
+ goto noflagchange;
+ }
+
+ if (release)
+ s_shiftState &= ~(flag);
+ else
+ s_shiftState |= flag;
+
+ /*
+ * Shift, control and alt keys don't have to be
+ * queued, flags will be set!
+ */
+ // huh?
+ flagchange=true;
+ goto skip_flagchange;
+
+noflagchange:
+ /* Format the new keycode */
+ if (shift)
+ keycode |= KEY_SHIFT_FLAG;
+ if ((s_shiftState & CTRL_MASK) != 0)
+ keycode |= KEY_CTRL_FLAG;
+ if ((s_shiftState & ALT_MASK) != 0)
+ keycode |= KEY_ALT_FLAG;
+ if (release)
+ keycode |= KEY_RELEASE_FLAG;
+
+
+skip_flagchange:
+
+ if (target==TARGET_GEEKOS) {
+ if (raw_scancode==0xc4) { // F10 release
+ Print("Switching keyboard to VMM\n");
+ target=TARGET_VMM;
+ } else {
+ if (flagchange) {
goto done;
+ }
+ /* Put the keycode in the buffer */
+ Enqueue_Keycode(keycode);
+
+ /* Wake up event consumers */
+ Wake_Up(&s_waitQueue);
+
+ /*
+ * Pick a new thread upon return from interrupt
+ * (hopefully the one waiting for the keyboard event)
+ */
+ g_needReschedule = true;
}
-
- /* Process the key */
- shift = ((s_shiftState & SHIFT_MASK) != 0);
- keycode = shift ? s_scanTableWithShift[scanCode] : s_scanTableNoShift[scanCode];
-
- /* Update shift, control and alt state */
- switch (keycode) {
- case KEY_LSHIFT:
- flag = LEFT_SHIFT;
- break;
- case KEY_RSHIFT:
- flag = RIGHT_SHIFT;
- break;
- case KEY_LCTRL:
- flag = LEFT_CTRL;
- break;
- case KEY_RCTRL:
- flag = RIGHT_CTRL;
- break;
- case KEY_LALT:
- flag = LEFT_ALT;
- break;
- case KEY_RALT:
- flag = RIGHT_ALT;
- break;
- default:
- goto noflagchange;
+ } else if (target==TARGET_VMM) {
+ if (raw_scancode==0xc4) { // F10 release
+ Print("Switching keyboard to GeekOS\n");
+ target=TARGET_GEEKOS;
+ } else {
+ deliver_key_to_vmm(raw_status,raw_scancode);
}
-
- if (release)
- s_shiftState &= ~(flag);
- else
- s_shiftState |= flag;
-
- /*
- * Shift, control and alt keys don't have to be
- * queued, flags will be set!
- */
- goto done;
-
-noflagchange:
- /* Format the new keycode */
- if (shift)
- keycode |= KEY_SHIFT_FLAG;
- if ((s_shiftState & CTRL_MASK) != 0)
- keycode |= KEY_CTRL_FLAG;
- if ((s_shiftState & ALT_MASK) != 0)
- keycode |= KEY_ALT_FLAG;
- if (release)
- keycode |= KEY_RELEASE_FLAG;
-
- /* Put the keycode in the buffer */
- Enqueue_Keycode(keycode);
-
- /* Wake up event consumers */
- Wake_Up(&s_waitQueue);
-
- /*
- * Pick a new thread upon return from interrupt
- * (hopefully the one waiting for the keyboard event)
- */
- g_needReschedule = true;
+ }
}
-done:
+ done:
End_IRQ(state);
+
}
/* ----------------------------------------------------------------------
