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#include <arch/types.h>
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#include <arch/types.h>
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ofw_entry ofw;
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ofw_entry ofw;
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phandle ofw_chosen;
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phandle ofw_chosen;
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ihandle ofw_stdin;
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ihandle ofw_stdout;
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ihandle ofw_stdout;
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void ofw_init(void)
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void ofw_init(void)
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{
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{
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    ofw_chosen = ofw_find_device("/chosen");
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    ofw_chosen = ofw_find_device("/chosen");
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    if (ofw_chosen == -1)
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    if (ofw_chosen == -1)
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        ofw_done();
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        ofw_done();
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    if (ofw_get_property(ofw_chosen, "stdin",  &ofw_stdin, sizeof(ofw_stdin)) <= 0)
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        ofw_stdin = 0;
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    if (ofw_get_property(ofw_chosen, "stdout",  &ofw_stdout, sizeof(ofw_stdout)) <= 0)
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    if (ofw_get_property(ofw_chosen, "stdout",  &ofw_stdout, sizeof(ofw_stdout)) <= 0)
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        ofw_stdout = 0;
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        ofw_stdout = 0;
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}
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}
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void ofw_done(void)
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void ofw_done(void)
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{
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{
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    (void) ofw_call("exit", 0, 0);
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    (void) ofw_call("exit", 0, 0);
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        return;
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        return;
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    (void) ofw_call("write", 3, 1, ofw_stdout, &ch, 1);
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    (void) ofw_call("write", 3, 1, ofw_stdout, &ch, 1);
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}
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}
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/** Read character from OFW's input.
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 *
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 * This call is non-blocking.
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 *
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 * @return 0 if no character was read, character read otherwise.
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 */
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char ofw_getchar(void)
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{
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    char ch;
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    if (ofw_stdin == 0)
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        return 0;
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    if (ofw_call("read", 3, 1, ofw_stdin, &ch, 1) == 1)
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        return ch;
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    else
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        return 0;
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}
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phandle ofw_find_device(const char *name)
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phandle ofw_find_device(const char *name)
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{
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{
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    return (phandle) ofw_call("finddevice", 1, 1, name);
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    return (phandle) ofw_call("finddevice", 1, 1, name);
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}
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}
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