patch-1.3.4 linux/arch/sparc/prom/ranges.c

• Lines: 110
• Date: Thu Jun 8 07:33:18 1995
• Orig file: v1.3.3/linux/arch/sparc/prom/ranges.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.3/linux/arch/sparc/prom/ranges.c linux/arch/sparc/prom/ranges.c
@@ -0,0 +1,109 @@
+/* ranges.c: Handle ranges in newer proms for obio.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+
+struct linux_prom_ranges promlib_obio_ranges[PROMREG_MAX];
+struct linux_prom_ranges promlib_sbus_ranges[PROMREG_MAX];
+int num_obio_ranges, num_sbus_ranges;
+
+/* Adjust register values based upon the ranges parameters. */
+void
+prom_adjust_regs(struct linux_prom_registers *regp, int nregs,
+		 struct linux_prom_ranges *rangep, int nranges)
+{
+	int regc, rngc;
+
+	for(regc=0; regc < nregs; regc++) {
+		for(rngc=0; rngc < nranges; rngc++)
+			if(regp[regc].which_io == rangep[rngc].ot_child_space)
+				break; /* Fount it */
+		if(rngc==nranges) /* oops */
+			prom_printf("adjust_regs: Could not find range with matching bus type...\n");
+		regp[regc].which_io = rangep[rngc].ot_parent_space;
+		regp[regc].phys_addr += rangep[rngc].ot_parent_base;
+	}
+
+	return;
+}
+
+void
+prom_adjust_ranges(struct linux_prom_ranges *ranges1, int nranges1,
+		   struct linux_prom_ranges *ranges2, int nranges2)
+{
+	int rng1c, rng2c;
+
+	for(rng1c=0; rng1c < nranges1; rng1c++) {
+		for(rng2c=0; rng2c < nranges2; rng2c++)
+			if(ranges1[rng1c].ot_child_space ==
+			   ranges2[rng2c].ot_child_space) break;
+		if(rng2c == nranges2) /* oops */
+			prom_printf("adjust_ranges: Could not find matching bus type...\n");
+		ranges1[rng1c].ot_parent_space = ranges2[rng2c].ot_parent_space;
+		ranges1[rng1c].ot_parent_base += ranges2[rng2c].ot_parent_base;
+	}
+
+	return;
+}
+
+/* Apply probed obio ranges to registers passed, if no ranges return. */
+void
+prom_apply_obio_ranges(struct linux_prom_registers *regs, int nregs)
+{
+	if(!num_obio_ranges) return;
+	prom_adjust_regs(regs, nregs, promlib_obio_ranges, num_obio_ranges);
+	return;
+}
+
+/* Apply probed sbus ranges to registers passed, if no ranges return. */
+void
+prom_apply_sbus_ranges(struct linux_prom_registers *regs, int nregs)
+{
+	if(!num_sbus_ranges) return;
+	prom_adjust_regs(regs, nregs, promlib_sbus_ranges, num_sbus_ranges);
+	return;
+}
+
+void
+prom_ranges_init(void)
+{
+	int node, obio_node, sbus_node;
+	int success;
+
+	num_obio_ranges = 0;
+	num_sbus_ranges = 0;
+
+	/* Check for obio and sbus ranges. */
+	node = prom_getchild(prom_root_node);
+	obio_node = prom_searchsiblings(node, "obio");
+	sbus_node = prom_searchsiblings(node, "iommu");
+	if(sbus_node) {
+		sbus_node = prom_getchild(sbus_node);
+		sbus_node = prom_searchsiblings(sbus_node, "sbus");
+	}
+
+	if(obio_node) {
+		success = prom_getproperty(obio_node, "ranges",
+					   (char *) promlib_obio_ranges,
+					   sizeof(promlib_obio_ranges));
+		if(success != -1)
+			num_obio_ranges = (success/sizeof(struct linux_prom_ranges));
+	}
+
+	if(sbus_node) {
+		success = prom_getproperty(sbus_node, "ranges",
+					   (char *) promlib_sbus_ranges,
+					   sizeof(promlib_sbus_ranges));
+		if(success != -1)
+			num_sbus_ranges = (success/sizeof(struct linux_prom_ranges));
+	}
+
+	if(num_obio_ranges || num_sbus_ranges)
+		prom_printf("PROMLIB: obio_ranges %d sbus_ranges %d\n",
+			    num_obio_ranges, num_sbus_ranges);
+
+	return;
+}