Keyboard working. Link C code from xv6 x86_64.

7 years ago · fa2e9866de
parent df58911ac4
commit fa2e9866de
4 changed files with 178 additions and 1 deletions
--- a/build.rs
+++ b/build.rs
@ -3,5 +3,6 @@ extern crate cc;
 fn main() {
    cc::Build::new()
 		.file("src/arch/x86_64/driver/apic/lapic.c")
+		.file("src/arch/x86_64/driver/keyboard/keyboard.c")
 		.compile("cobj");
 }
--- a/src/arch/x86_64/driver/keyboard/keyboard.c
+++ b/src/arch/x86_64/driver/keyboard/keyboard.c
@ -0,0 +1,165 @@
+// xv6 x86_64 kbd.c
+
+// PC keyboard interface constants
+
+#define KBSTATP         0x64    // kbd controller status port(I)
+#define KBS_DIB         0x01    // kbd data in buffer
+#define KBDATAP         0x60    // kbd data port(I)
+
+#define NO              0
+
+#define SHIFT           (1<<0)
+#define CTL             (1<<1)
+#define ALT             (1<<2)
+
+#define CAPSLOCK        (1<<3)
+#define NUMLOCK         (1<<4)
+#define SCROLLLOCK      (1<<5)
+
+#define E0ESC           (1<<6)
+
+// Special keycodes
+#define KEY_HOME        0xE0
+#define KEY_END         0xE1
+#define KEY_UP          0xE2
+#define KEY_DN          0xE3
+#define KEY_LF          0xE4
+#define KEY_RT          0xE5
+#define KEY_PGUP        0xE6
+#define KEY_PGDN        0xE7
+#define KEY_INS         0xE8
+#define KEY_DEL         0xE9
+
+// C('A') == Control-A
+#define C(x) (x - '@')
+
+typedef unsigned char uchar;
+typedef unsigned short ushort;
+typedef unsigned int uint;
+
+static inline uchar
+inb(ushort port)
+{
+	uchar data;
+
+	asm volatile("in %1,%0" : "=a" (data) : "d" (port));
+	return data;
+}
+
+static uchar shiftcode[256] =
+		{
+				[0x1D] = CTL,
+				[0x2A] = SHIFT,
+				[0x36] = SHIFT,
+				[0x38] = ALT,
+				[0x9D] = CTL,
+				[0xB8] = ALT
+		};
+
+static uchar togglecode[256] =
+		{
+				[0x3A] = CAPSLOCK,
+				[0x45] = NUMLOCK,
+				[0x46] = SCROLLLOCK
+		};
+
+static uchar normalmap[256] =
+		{
+				NO, 0x1B, '1', '2', '3', '4', '5', '6',  // 0x00
+				'7', '8', '9', '0', '-', '=', '\b', '\t',
+				'q', 'w', 'e', 'r', 't', 'y', 'u', 'i',  // 0x10
+				'o', 'p', '[', ']', '\n', NO, 'a', 's',
+				'd', 'f', 'g', 'h', 'j', 'k', 'l', ';',  // 0x20
+				'\'', '`', NO, '\\', 'z', 'x', 'c', 'v',
+				'b', 'n', 'm', ',', '.', '/', NO, '*',  // 0x30
+				NO, ' ', NO, NO, NO, NO, NO, NO,
+				NO, NO, NO, NO, NO, NO, NO, '7',  // 0x40
+				'8', '9', '-', '4', '5', '6', '+', '1',
+				'2', '3', '0', '.', NO, NO, NO, NO,   // 0x50
+				[0x9C] = '\n',      // KP_Enter
+				[0xB5] = '/',       // KP_Div
+				[0xC8] = KEY_UP, [0xD0] = KEY_DN,
+				[0xC9] = KEY_PGUP, [0xD1] = KEY_PGDN,
+				[0xCB] = KEY_LF, [0xCD] = KEY_RT,
+				[0x97] = KEY_HOME, [0xCF] = KEY_END,
+				[0xD2] = KEY_INS, [0xD3] = KEY_DEL
+		};
+
+static uchar shiftmap[256] =
+		{
+				NO, 033, '!', '@', '#', '$', '%', '^',  // 0x00
+				'&', '*', '(', ')', '_', '+', '\b', '\t',
+				'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I',  // 0x10
+				'O', 'P', '{', '}', '\n', NO, 'A', 'S',
+				'D', 'F', 'G', 'H', 'J', 'K', 'L', ':',  // 0x20
+				'"', '~', NO, '|', 'Z', 'X', 'C', 'V',
+				'B', 'N', 'M', '<', '>', '?', NO, '*',  // 0x30
+				NO, ' ', NO, NO, NO, NO, NO, NO,
+				NO, NO, NO, NO, NO, NO, NO, '7',  // 0x40
+				'8', '9', '-', '4', '5', '6', '+', '1',
+				'2', '3', '0', '.', NO, NO, NO, NO,   // 0x50
+				[0x9C] = '\n',      // KP_Enter
+				[0xB5] = '/',       // KP_Div
+				[0xC8] = KEY_UP, [0xD0] = KEY_DN,
+				[0xC9] = KEY_PGUP, [0xD1] = KEY_PGDN,
+				[0xCB] = KEY_LF, [0xCD] = KEY_RT,
+				[0x97] = KEY_HOME, [0xCF] = KEY_END,
+				[0xD2] = KEY_INS, [0xD3] = KEY_DEL
+		};
+
+static uchar ctlmap[256] =
+		{
+				NO, NO, NO, NO, NO, NO, NO, NO,
+				NO, NO, NO, NO, NO, NO, NO, NO,
+				C('Q'), C('W'), C('E'), C('R'), C('T'), C('Y'), C('U'), C('I'),
+				C('O'), C('P'), NO, NO, '\r', NO, C('A'), C('S'),
+				C('D'), C('F'), C('G'), C('H'), C('J'), C('K'), C('L'), NO,
+				NO, NO, NO, C('\\'), C('Z'), C('X'), C('C'), C('V'),
+				C('B'), C('N'), C('M'), NO, NO, C('/'), NO, NO,
+				[0x9C] = '\r',      // KP_Enter
+				[0xB5] = C('/'),    // KP_Div
+				[0xC8] = KEY_UP, [0xD0] = KEY_DN,
+				[0xC9] = KEY_PGUP, [0xD1] = KEY_PGDN,
+				[0xCB] = KEY_LF, [0xCD] = KEY_RT,
+				[0x97] = KEY_HOME, [0xCF] = KEY_END,
+				[0xD2] = KEY_INS, [0xD3] = KEY_DEL
+		};
+
+int
+kbdgetc(void) {
+	static uint shift;
+	static uchar *charcode[4] = {
+			normalmap, shiftmap, ctlmap, ctlmap
+	};
+	uint st, data, c;
+
+	st = inb(KBSTATP);
+	if ((st & KBS_DIB) == 0)
+		return -1;
+	data = inb(KBDATAP);
+
+	if (data == 0xE0) {
+		shift |= E0ESC;
+		return 0;
+	} else if (data & 0x80) {
+		// Key released
+		data = (shift & E0ESC ? data : data & 0x7F);
+		shift &= ~(shiftcode[data] | E0ESC);
+		return 0;
+	} else if (shift & E0ESC) {
+		// Last character was an E0 escape; or with 0x80
+		data |= 0x80;
+		shift &= ~E0ESC;
+	}
+
+	shift |= shiftcode[data];
+	shift ^= togglecode[data];
+	c = charcode[shift & (CTL | SHIFT)][data];
+	if (shift & CAPSLOCK) {
+		if ('a' <= c && c <= 'z')
+			c += 'A' - 'a';
+		else if ('A' <= c && c <= 'Z')
+			c += 'a' - 'A';
+	}
+	return c;
+}
--- a/src/arch/x86_64/driver/keyboard/mod.rs
+++ b/src/arch/x86_64/driver/keyboard/mod.rs
@ -4,4 +4,12 @@ pub fn init() {
 	use consts::irq::*;
 	use arch::interrupt::enable_irq;
 	enable_irq(IRQ_KBD);
+}
+
+pub fn get() -> i32 {
+	unsafe{ kbdgetc() }
+}
+
+extern {
+    fn kbdgetc() -> i32;
 }
--- a/src/arch/x86_64/interrupt/irq.rs
+++ b/src/arch/x86_64/interrupt/irq.rs
@ -30,7 +30,10 @@ use consts::irq::*;
 pub extern "x86-interrupt" fn keyboard_handler(
    stack_frame: &mut ExceptionStackFrame)
 {
-    println!("\nInterupt: Keyboard \n{:#?}", stack_frame);
+    use arch::driver::keyboard;
+    println!("\nInterupt: Keyboard");
+    let c = keyboard::get();
+    println!("Key = '{}' {}", c as u8 as char, c);
    ack(IRQ_KBD);
 }