The patch titled
mn10300: insert PCI root bus resources for the ASB2305 devel motherboard
has been added to the -mm tree. Its filename is
mn10300-insert-pci-root-bus-resources-for-the-asb2305-devel-motherboard.patch
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Subject: mn10300: insert PCI root bus resources for the ASB2305 devel motherboard
From: David Howells <dhowells@xxxxxxxxxx>
Insert PCI root bus resources for the MN10300-based ASB2305 development
kit motherboard. This is required because the CPU's window onto the PCI
bus address space is considerably smaller than the CPU's full address
space and non-PCI devices lie outside of the PCI window that we might want
to access.
Without this patch, the PCI root bus uses the platform-level bus
resources, and these are then confined to the PCI window, thus making
platform_device_add() reject devices outside of this window.
We also add a reservation for the PCI SRAM region.
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/mn10300/unit-asb2305/pci.c | 57 ++++++++++++++++++------------
1 file changed, 35 insertions(+), 22 deletions(-)
diff -puN arch/mn10300/unit-asb2305/pci.c~mn10300-insert-pci-root-bus-resources-for-the-asb2305-devel-motherboard arch/mn10300/unit-asb2305/pci.c
--- a/arch/mn10300/unit-asb2305/pci.c~mn10300-insert-pci-root-bus-resources-for-the-asb2305-devel-motherboard
+++ a/arch/mn10300/unit-asb2305/pci.c
@@ -27,6 +27,29 @@ struct pci_bus *pci_root_bus;
struct pci_ops *pci_root_ops;
/*
+ * The accessible PCI window does not cover the entire CPU address space, but
+ * there are devices we want to access outside of that window, so we need to
+ * insert specific PCI bus resources instead of using the platform-level bus
+ * resources directly for the PCI root bus.
+ *
+ * These are configured and inserted by pcibios_init() and are attached to the
+ * root bus by pcibios_fixup_bus().
+ */
+static struct resource pci_ioport_resource = {
+ .name = "PCI IO",
+ .start = 0xbe000000,
+ .end = 0xbe03ffff,
+ .flags = IORESOURCE_IO,
+};
+
+static struct resource pci_iomem_resource = {
+ .name = "PCI mem",
+ .start = 0xb8000000,
+ .end = 0xbbffffff,
+ .flags = IORESOURCE_MEM,
+};
+
+/*
* Functions for accessing PCI configuration space
*/
@@ -297,6 +320,7 @@ static int __init pci_check_direct(void)
printk(KERN_INFO "PCI: Using configuration ampci\n");
request_mem_region(0xBE040000, 256, "AMPCI bridge");
request_mem_region(0xBFFFFFF4, 12, "PCI ampci");
+ request_mem_region(0xBC000000, 32 * 1024 * 1024, "PCI SRAM");
return 0;
}
@@ -358,6 +382,11 @@ void __devinit pcibios_fixup_bus(struct
{
struct pci_dev *dev;
+ if (bus->number == 0) {
+ bus->resource[0] = &pci_ioport_resource;
+ bus->resource[1] = &pci_iomem_resource;
+ }
+
if (bus->self) {
pci_read_bridge_bases(bus);
pcibios_fixup_device_resources(bus->self);
@@ -380,6 +409,11 @@ static int __init pcibios_init(void)
iomem_resource.start = 0xA0000000;
iomem_resource.end = 0xDFFFFFFF;
+ if (insert_resource(&iomem_resource, &pci_iomem_resource) < 0)
+ panic("Unable to insert PCI IOMEM resource\n");
+ if (insert_resource(&ioport_resource, &pci_ioport_resource) < 0)
+ panic("Unable to insert PCI IOPORT resource\n");
+
if (!pci_probe)
return 0;
@@ -391,32 +425,11 @@ static int __init pcibios_init(void)
printk(KERN_INFO "PCI: Probing PCI hardware [mempage %08x]\n",
MEM_PAGING_REG);
- {
-#if 0
- static struct pci_bus am33_root_bus = {
- .children = LIST_HEAD_INIT(am33_root_bus.children),
- .devices = LIST_HEAD_INIT(am33_root_bus.devices),
- .number = 0,
- .secondary = 0,
- .resource = { &ioport_resource, &iomem_resource },
- };
-
- am33_root_bus.ops = pci_root_ops;
- list_add_tail(&am33_root_bus.node, &pci_root_buses);
-
- am33_root_bus.subordinate = pci_do_scan_bus(0);
-
- pci_root_bus = &am33_root_bus;
-#else
- pci_root_bus = pci_scan_bus(0, &pci_direct_ampci, NULL);
-#endif
- }
+ pci_root_bus = pci_scan_bus(0, &pci_direct_ampci, NULL);
pcibios_irq_init();
pcibios_fixup_irqs();
-#if 0
pcibios_resource_survey();
-#endif
return 0;
}
_
Patches currently in -mm which might be from dhowells@xxxxxxxxxx are
mm-make-totalhigh_pages-unsigned-long.patch
fdpic-respect-pt_gnu_stack-exec-protection-markings-when-creating-nommu-stack.patch
nommu-avoiding-duplicate-icache-flushes-of-shared-maps.patch
nommu-use-copy__user_page-in-access_process_vm.patch
mn10300-signal-stack-fix.patch
mn10300-objcopy-flags-fix.patch
mn10300-add-cc-clobbers-to-asm-statements.patch
mn10300-wire-up-missing-new-syscalls.patch
fix-several-bogus-includes-on-mn10300-abs2305.patch
mn10300-use-kern_err-not-kern_error.patch
mn10300-use-generic-pci_enable_resources.patch
mn10300-insert-pci-root-bus-resources-for-the-asb2305-devel-motherboard.patch
mn10300-make-the-asb2305s-pcnet32-nic-work-by-using-the-pci-bridges-sram.patch
mn10300-update-the-asb2303-defconfig.patch
kernel-credc-use-kmem_cache_free.patch
frv-duplicate-output_buffer-of-e03.patch
mutex-subsystem-synchro-test-module.patch
mutex-subsystem-synchro-test-module-add-missing-header-file.patch
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