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Line 35... Line 35...
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static chardev_t console;
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static chardev_t console;
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static void msim_write(chardev_t *dev, const char ch);
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static void msim_write(chardev_t *dev, const char ch);
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static void msim_enable(chardev_t *dev);
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static void msim_enable(chardev_t *dev);
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static void msim_disable(chardev_t *dev);
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static void msim_disable(chardev_t *dev);
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static char msim_do_read(chardev_t *dev);
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static chardev_operations_t msim_ops = {
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static chardev_operations_t msim_ops = {
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    .resume = msim_enable,
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    .resume = msim_enable,
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    .suspend = msim_disable,
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    .suspend = msim_disable,
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    .write = msim_write
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    .write = msim_write,
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    .read = msim_do_read,
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};
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};
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/** Putchar that works with MSIM & gxemul */
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/** Putchar that works with MSIM & gxemul */
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void msim_write(chardev_t *dev, const char ch)
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void msim_write(chardev_t *dev, const char ch)
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{
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{
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{
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{
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    cp0_mask_int(MSIM_KBD_IRQ);
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    cp0_mask_int(MSIM_KBD_IRQ);
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}
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}
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#include <print.h>
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#include <print.h>
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/** Read character using polling, assume interrupts disabled */
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static char msim_do_read(chardev_t *dev)
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{
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    char ch;
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    while (1) {
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        ch = *((volatile char *) MSIM_KBD_ADDRESS);
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        if (ch) {
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            if (ch == '\r')
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                return '\n';
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            if (ch == 0x7f)
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                return '\b';
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            return ch;
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        }
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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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static void msim_interrupt(int n, void *stack)
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static void msim_interrupt(int n, void *stack)
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{
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{
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    char ch;
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    char ch = 0;
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    ch = *((char *) MSIM_KBD_ADDRESS);
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    ch = *((char *) MSIM_KBD_ADDRESS);
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    if (ch =='\r')
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    if (ch =='\r')
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        ch = '\n';
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        ch = '\n';
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    if (ch == 0x7f)
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    if (ch == 0x7f)