1 files changed, 107 insertions, 0 deletions
diff --git a/arch/sparc64/prom/ranges.c b/arch/sparc64/prom/ranges.c
new file mode 100644
index 000000000..323539237
--- /dev/null
+++ b/arch/sparc64/prom/ranges.c
@@ -0,0 +1,107 @@
+/* $Id: ranges.c,v 1.3 1997/03/21 12:33:36 jj Exp $
+ * ranges.c: Handle ranges in newer proms for obio/sbus.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+
+#include <linux/init.h>
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+#include <asm/sbus.h>
+#include <asm/system.h>
+
+struct linux_prom_ranges promlib_obio_ranges[PROMREG_MAX];
+int num_obio_ranges;
+
+/* Adjust register values based upon the ranges parameters. */
+inline 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;
+	}
+}
+
+inline 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;
+	}
+}
+
+/* Apply probed sbus ranges to registers passed, if no ranges return. */
+void prom_apply_sbus_ranges(struct linux_sbus *sbus, struct linux_prom_registers *regs,
+			    int nregs, struct linux_sbus_device *sdev)
+{
+	if(sbus->num_sbus_ranges) {
+		if(sdev && (sdev->ranges_applied == 0)) {
+			sdev->ranges_applied = 1;
+			prom_adjust_regs(regs, nregs, sbus->sbus_ranges,
+					 sbus->num_sbus_ranges);
+		}
+	}
+}
+
+__initfunc(void prom_ranges_init(void))
+{
+}
+
+__initfunc(void prom_sbus_ranges_init(int iommund, struct linux_sbus *sbus))
+{
+	int success;
+	
+	sbus->num_sbus_ranges = 0;
+	success = prom_getproperty(sbus->prom_node, "ranges",
+				   (char *) sbus->sbus_ranges,
+				   sizeof (sbus->sbus_ranges));
+	if (success != -1)
+		sbus->num_sbus_ranges = (success/sizeof(struct linux_prom_ranges));
+}
+
+void
+prom_apply_generic_ranges (int node, int parent, struct linux_prom_registers *regs, int nregs)
+{
+	int success;
+	int num_ranges;
+	struct linux_prom_ranges ranges[PROMREG_MAX];
+	
+	success = prom_getproperty(node, "ranges",
+				   (char *) ranges,
+				   sizeof (ranges));
+	if (success != -1) {
+		num_ranges = (success/sizeof(struct linux_prom_ranges));
+		if (parent) {
+			struct linux_prom_ranges parent_ranges[PROMREG_MAX];
+			int num_parent_ranges;
+		
+			success = prom_getproperty(parent, "ranges",
+				   		   (char *) parent_ranges,
+				   		   sizeof (parent_ranges));
+			if (success != -1) {
+				num_parent_ranges = (success/sizeof(struct linux_prom_ranges));
+				prom_adjust_ranges (ranges, num_ranges, parent_ranges, num_parent_ranges);
+			}
+		}
+		prom_adjust_regs(regs, nregs, ranges, num_ranges);
+	}
+}