This is the first part of my Xilleon port.
I am sending the full set of patches to [email protected]
which is archived at: http://www.linux-mips.org/archives/
Only the patches that touch generic parts of the kernel are coming
here.
The Xilleon's (32bit MIPS SOC) PCU resides on the PCI bus, but is
non-standard in that it has several apertures that should not be
mapped into the standard PCI aperture.
The idea behind the patch is that ports that define
CONFIG_PCIBIOS_OVERRIDE_RESOURCE supply a hook in their pcibios
(pcibios_override_resource()) that gets a chance to handle a mapping
before the default pci setup code tries to do it.
For ports that don't define CONFIG_PCIBIOS_OVERRIDE_RESOURCE
(i.e. everything except Xilleon) there should be no change.
patch against 2.6.14-rc2 from linux-mips.org
Signed-off-by: David Daney <[email protected]>
pcibios_override_resource infrastructure. Initially for use with
xilleon port.
---
commit d559c11c9fecd8ec2a952982083e3a1fe118ab09
tree ee2da62d9441f3d829f79a9ff9912ba279b290fc
parent 8817d129d5d5fc662858925aa39ddda0cb3b73a0
author David Daney <[email protected]> Tue, 04 Oct 2005 13:32:14 -0700
committer David Daney <[email protected]> Tue, 04 Oct 2005 13:32:14 -0700
drivers/pci/setup-res.c | 10 ++++++----
include/linux/pci.h | 9 +++++++++
2 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -127,10 +127,12 @@ int pci_assign_resource(struct pci_dev *
required alignment in the "start" field. */
align = (resno < PCI_BRIDGE_RESOURCES) ? size : res->start;
- /* First, try exact prefetching match.. */
- ret = pci_bus_alloc_resource(bus, res, size, align, min,
- IORESOURCE_PREFETCH,
- pcibios_align_resource, dev);
+ ret = pcibios_override_resource(dev, resno);
+ if (ret)
+ /* First, try exact prefetching match.. */
+ ret = pci_bus_alloc_resource(bus, res, size, align, min,
+ IORESOURCE_PREFETCH,
+ pcibios_align_resource, dev);
if (ret < 0 && (res->flags & IORESOURCE_PREFETCH)) {
/*
diff --git a/include/linux/pci.h b/include/linux/pci.h
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -293,6 +293,15 @@ extern struct bus_type pci_bus_type;
extern struct list_head pci_root_buses; /* list of all known PCI buses */
extern struct list_head pci_devices; /* list of all devices */
+#ifdef CONFIG_PCIBIOS_OVERRIDE_RESOURCE
+int pcibios_override_resource(struct pci_dev *dev, int resno);
+#else
+static inline int pcibios_override_resource(struct pci_dev *dev, int resno)
+{
+ return 1;
+}
+#endif
+
void pcibios_fixup_bus(struct pci_bus *);
int pcibios_enable_device(struct pci_dev *, int mask);
char *pcibios_setup (char *str);
-
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