PPC32: fixes for I/O mappings on CHRP machines.

arch/ppc/kernel/pci.c

@@ -923,6 +923,7 @@ pci_process_bridge_OF_ranges(struct pci_controller *hose,
 			   struct device_node *dev, int primary)
 {
 	unsigned int *ranges, *prev;
+	unsigned int size;
 	int rlen = 0;
 	int memno = 0;
 	struct resource *res;
@@ -963,12 +964,16 @@ pci_process_bridge_OF_ranges(struct pci_controller *hose,
 	ranges = (unsigned int *) get_property(dev, "ranges", &rlen);
 	while ((rlen -= np * sizeof(unsigned int)) >= 0) {
 		res = NULL;
+		size = ranges[na+4];
 		switch (ranges[0] >> 24) {
 		case 1:		/* I/O space */
 			if (ranges[2] != 0)
 				break;
 			hose->io_base_phys = ranges[na+2];
-			hose->io_base_virt = ioremap(ranges[na+2], ranges[na+4]);
+			/* limit I/O space to 16MB */
+			if (size > 0x01000000)
+				size = 0x01000000;
+			hose->io_base_virt = ioremap(ranges[na+2], size);
 			if (primary)
 				isa_io_base = (unsigned long) hose->io_base_virt;
 			res = &hose->io_resource;
@@ -997,7 +1002,7 @@ pci_process_bridge_OF_ranges(struct pci_controller *hose,
 		}
 		if (res != NULL) {
 			res->name = dev->full_name;
-			res->end = res->start + ranges[na+4] - 1;
+			res->end = res->start + size - 1;
 			res->parent = NULL;
 			res->sibling = NULL;
 			res->child = NULL;

arch/ppc/platforms/chrp_setup.c

@@ -464,35 +464,6 @@ chrp_init2(void)
 #endif /* CONFIG_VT && (CONFIG_ADB_KEYBOARD || CONFIG_INPUT) */
 }
 
-/*
- * One of the main thing these mappings are needed for is so that
- * xmon can get to the serial port early on.  We probably should
- * handle the machines with the mpc106 as well as the python (F50)
- * and the GG2 (longtrail).  Actually we should look in the device
- * tree and do the right thing.
- */
-static void __init
-chrp_map_io(void)
-{
-	char *name;
-
-	/*
-	 * The code below tends to get removed, please don't take it out.
-	 * The F50 needs this mapping and it you take it out I'll track you
-	 * down and slap your hands.  If it causes problems please email me.
-	 *  -- Cort <cort@fsmlabs.com>
-	 */
-	name = get_property(find_path_device("/"), "name", NULL);
-	if (name && strncmp(name, "IBM-70", 6) == 0
-	    && strstr(name, "-F50")) {
-		io_block_mapping(0x80000000, 0x80000000, 0x10000000, _PAGE_IO);
-		io_block_mapping(0x90000000, 0x90000000, 0x10000000, _PAGE_IO);
-		return;
-	} else {
-		io_block_mapping(0xf8000000, 0xf8000000, 0x04000000, _PAGE_IO);
-	}
-}
-
 void __init
 chrp_init(unsigned long r3, unsigned long r4, unsigned long r5,
 	  unsigned long r6, unsigned long r7)
@@ -530,7 +501,6 @@ chrp_init(unsigned long r3, unsigned long r4, unsigned long r5,
 	ppc_md.calibrate_decr = chrp_calibrate_decr;
 
 	ppc_md.find_end_of_memory = pmac_find_end_of_memory;
-	ppc_md.setup_io_mappings = chrp_map_io;
 
 #ifdef CONFIG_VT
 	/* these are adjusted in chrp_init2 if we have an ADB keyboard */