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Rev 534 Rev 567
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#include <arch/cp0.h>
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#include <arch/cp0.h>
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#include <putchar.h>
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#include <putchar.h>
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#include <synch/spinlock.h>
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#include <synch/spinlock.h>
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#include <synch/waitq.h>
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#include <synch/waitq.h>
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#include <typedefs.h>
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#include <typedefs.h>
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#include <arch/drivers/arc.h>
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static void keyboard_enable(void);
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static void keyboard_enable(void);
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static void keyboard_disable(void);
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static void keyboard_disable(void);
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static void arc_kb_disable(void);
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static void arc_kb_enable(void);
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static chardev_t kbrd;
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static chardev_t kbrd;
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static chardev_operations_t ops = {
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static chardev_operations_t arc_ops = {
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    .resume = arc_kb_enable,
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    .suspend = arc_kb_disable
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};
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static chardev_operations_t msim_ops = {
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    .resume = keyboard_enable,
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    .resume = keyboard_enable,
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    .suspend = keyboard_disable
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    .suspend = keyboard_disable
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};
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};
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static int arc_kb_enabled;
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/** Initialize keyboard subsystem. */
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/** Initialize keyboard subsystem. */
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void keyboard_init(void)
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void keyboard_init(void)
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{
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{
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    if (arc_enabled()) {
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        chardev_initialize(&kbrd, &arc_ops);
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        arc_kb_enabled = 1;
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    } else {
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    cp0_unmask_int(KEYBOARD_IRQ);
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        cp0_unmask_int(KEYBOARD_IRQ);
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    chardev_initialize(&kbrd, &ops);
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        chardev_initialize(&kbrd, &msim_ops);
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    }
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    stdin = &kbrd;
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    stdin = &kbrd;
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}
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}
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/** Process keyboard interrupt. */
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/** Process keyboard interrupt. */
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void keyboard(void)
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void keyboard(void)
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/* Called from getc(). */
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/* Called from getc(). */
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void keyboard_disable(void)
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void keyboard_disable(void)
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{
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{
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    cp0_mask_int(KEYBOARD_IRQ);
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    cp0_mask_int(KEYBOARD_IRQ);
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}
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}
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/*****************************/
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/* Arc keyboard */
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void keyboard_poll(void)
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{
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    int ch;
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    if (!arc_enabled() || !arc_kb_enabled)
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        return;
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    while ((ch = arc_getchar()) != -1)
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        chardev_push_character(&kbrd, ch);     
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}
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static void arc_kb_enable(void)
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{
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    arc_kb_enabled = 1;
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}
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/* Called from getc(). */
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static void arc_kb_disable(void)
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{
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    arc_kb_enabled = 0;
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}