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Rev 1702 Rev 1780
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chardev_t ski_uconsole;
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chardev_t ski_uconsole;
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static bool kb_disable;
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static bool kb_disable;
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int kbd_uspace=0;
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int kbd_uspace=0;
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static void ski_putchar(chardev_t *d, const char ch);
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static void ski_putchar(chardev_t *d, const char ch);
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static __s32 ski_getchar(void);
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static int32_t ski_getchar(void);
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/** Display character on debug console
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/** Display character on debug console
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 *
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 *
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 * Use SSC (Simulator System Call) to
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 * Use SSC (Simulator System Call) to
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 * display character on debug console.
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 * display character on debug console.
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 *
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 *
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 * This call is non-blocking.
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 * This call is non-blocking.
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 *
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 *
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 * @return ASCII code of pressed key or 0 if no key pressed.
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 * @return ASCII code of pressed key or 0 if no key pressed.
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 */
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 */
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__s32 ski_getchar(void)
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int32_t ski_getchar(void)
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{
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{
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    __u64 ch;
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    uint64_t ch;
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    __asm__ volatile (
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    __asm__ volatile (
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        "mov r15=%1\n"
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        "mov r15=%1\n"
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        "break 0x80000;;\n" /* modifies r8 */
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        "break 0x80000;;\n" /* modifies r8 */
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        "mov %0=r8;;\n"    
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        "mov %0=r8;;\n"    
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        : "=r" (ch)
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        : "=r" (ch)
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        : "i" (SKI_GETCHAR)
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        : "i" (SKI_GETCHAR)
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        : "r15",  "r8"
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        : "r15",  "r8"
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    );
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    );
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    return (__s32) ch;
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    return (int32_t) ch;
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}
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}
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/**
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/**
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 * This is a blocking wrapper for ski_getchar().
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 * This is a blocking wrapper for ski_getchar().
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 * To be used when the kernel crashes.
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 * To be used when the kernel crashes.