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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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 */
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#include "ofw.h"
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#include "ofw.h"
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#include "printf.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_mmu;
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ihandle ofw_stdout;
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ihandle ofw_stdout;
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void init(void)
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void 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_call("exit", 0, 0);
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        halt();
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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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    ofw_mmu = ofw_open("/mmu");
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    if (ofw_mmu == -1) {
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        puts("Unable to open /mmu node\n");
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        halt();
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    }
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}
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void halt(void)
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{
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    ofw_call("exit", 0, 0);
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}
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}
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int ofw_call(const char *service, const int nargs, const int nret, ...)
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int ofw_call(const char *service, const int nargs, const int nret, ...)
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{
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{
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    for (i = 0; i < nret; i++)
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    for (i = 0; i < nret; i++)
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        args.args[i + nargs] = 0;
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        args.args[i + nargs] = 0;
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    ofw(&args);
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    ofw(&args);
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    if (nret > 0)
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    return args.args[nargs];
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        return args.args[nargs + nret - 1];
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    else
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        return 0;
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}
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}
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void ofw_write(const char *str, const int len)
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ihandle ofw_open(const char *name)
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{
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{
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    if (ofw_stdout == 0)
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        return;
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    ofw_call("write", 3, 1, ofw_stdout, str, len);
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    return ofw_call("open", 1, 1, name);
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}
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}
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void ofw_puts(const char *str)
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void ofw_write(const char *str, const int len)
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{
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{
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    int len = 0;
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    while (str[len] != 0)
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    if (ofw_stdout == 0)
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        len++;
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        return;
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    ofw_write(str, len);
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    ofw_call("write", 3, 1, ofw_stdout, str, len);
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}
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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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void *ofw_claim(const void *addr, const int size, const int align)
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void *ofw_claim(const void *addr, const int size, const int align)
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{
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{
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    return (void *) ofw_call("claim", 3, 1, addr, size, align);
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    return (void *) ofw_call("claim", 3, 1, addr, size, align);
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}
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}
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void *ofw_translate(const void *virt)
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{
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    return (void *) ofw_call_method(ofw_mmu, "translate", 1, 5, virt);
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}