powerpc: Run on old powermacs.
Old powermacs have a number of differences from current machines:
- there is no interrupt tree in the device tree, just interrupt
or AAPL,interrupt properties
- the chosen node in the device tree is called /chosen@0
- the OF claim method doesn't map the memory, so we have to do
an explicit map call as well
- there is no /chosen/cpu property on SMP machines
- the NVRAM isn't structured as a set of partitions.
This adapts the merged powermac support code to cope with these
issues.
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index c8d2884..69f69c3 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -309,6 +309,37 @@
unsigned int *irq, virq;
struct device_node *ic;
+ if (num_interrupt_controllers == 0) {
+ /*
+ * Old machines just have a list of interrupt numbers
+ * and no interrupt-controller nodes.
+ */
+ ints = (unsigned int *) get_property(np, "AAPL,interrupts",
+ &intlen);
+ /* XXX old interpret_pci_props looked in parent too */
+ /* XXX old interpret_macio_props looked for interrupts
+ before AAPL,interrupts */
+ if (ints == NULL)
+ ints = (unsigned int *) get_property(np, "interrupts",
+ &intlen);
+ if (ints == NULL)
+ return 0;
+
+ np->n_intrs = intlen / sizeof(unsigned int);
+ np->intrs = prom_alloc(np->n_intrs * sizeof(np->intrs[0]),
+ mem_start);
+ if (!np->intrs)
+ return -ENOMEM;
+ if (measure_only)
+ return 0;
+
+ for (i = 0; i < np->n_intrs; ++i) {
+ np->intrs[i].line = *ints++;
+ np->intrs[i].sense = 1;
+ }
+ return 0;
+ }
+
ints = (unsigned int *) get_property(np, "interrupts", &intlen);
if (ints == NULL)
return 0;
@@ -1024,6 +1055,8 @@
/* Get pointer to OF "/chosen" node for use everywhere */
of_chosen = of_find_node_by_path("/chosen");
+ if (of_chosen == NULL)
+ of_chosen = of_find_node_by_path("/chosen@0");
/* Retreive command line */
if (of_chosen != NULL) {
@@ -1123,7 +1156,8 @@
DBG("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
- if (depth != 1 || strcmp(uname, "chosen") != 0)
+ if (depth != 1 ||
+ (strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
return 0;
/* get platform type */