patch-1.3.71 linux/arch/sparc/kernel/auxio.c

• Lines: 41
• Date: Mon Mar 4 08:49:54 1996
• Orig file: v1.3.70/linux/arch/sparc/kernel/auxio.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.70/linux/arch/sparc/kernel/auxio.c linux/arch/sparc/kernel/auxio.c
@@ -0,0 +1,40 @@
+/* auxio.c: Probing for the Sparc AUXIO register at boot time.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#include <asm/oplib.h>
+#include <asm/io.h>
+
+/* Probe and map in the Auxiliary I/O register */
+unsigned char *auxio_register;
+
+void
+auxio_probe(void)
+{
+	int node, auxio_nd;
+	struct linux_prom_registers auxregs[1];
+
+	node = prom_getchild(prom_root_node);
+	auxio_nd = prom_searchsiblings(node, "auxiliary-io");
+	if(!auxio_nd) {
+		node = prom_searchsiblings(node, "obio");
+		node = prom_getchild(node);
+		auxio_nd = prom_searchsiblings(node, "auxio");
+		if(!auxio_nd) {
+			prom_printf("Cannot find auxio node, cannot continue...\n");
+			prom_halt();
+		}
+	}
+	prom_getproperty(auxio_nd, "reg", (char *) auxregs, sizeof(auxregs));
+	prom_apply_obio_ranges(auxregs, 0x1);
+	/* Map the register both read and write */
+	auxio_register = (unsigned char *) sparc_alloc_io(auxregs[0].phys_addr, 0,
+							  auxregs[0].reg_size,
+							  "auxilliaryIO",
+							  auxregs[0].which_io, 0x0);
+	/* Fix the address on sun4m and sun4c. */
+	if((((unsigned long) auxregs[0].phys_addr) & 3) == 3 ||
+	   sparc_cpu_model == sun4c)
+		auxio_register = (unsigned char *) ((int)auxio_register | 3);
+}