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sh: support PCI domains. 

Newer SH parts are now commonly shipping with multiple controllers, so
we wire up PCI domain support to deal with them. Shamelessly cloned from
the MIPS implementation.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2010-01-29 22:38:13 +09:00
parent ac8ab54a8e
commit 320e68da59
3 changed files with 31 additions and 3 deletions
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4
arch/sh/Kconfig
View File

@ -826,11 +826,15 @@ config MAPLE
config PCI
bool "PCI support"
depends on SYS_SUPPORTS_PCI
select PCI_DOMAINS
help
Find out whether you have a PCI motherboard. PCI is the name of a
bus system, i.e. the way the CPU talks to the other stuff inside
your box. If you have PCI, say Y, otherwise N.
config PCI_DOMAINS
bool
source "drivers/pci/pcie/Kconfig"
source "drivers/pci/Kconfig"

17
arch/sh/drivers/pci/pci.c
View File

@ -33,15 +33,22 @@ static int pci_initialized;
static void __devinit pcibios_scanbus(struct pci_channel *hose)
{
static int next_busno;
static int need_domain_info;
struct pci_bus *bus;
bus = pci_scan_bus(next_busno, hose->pci_ops, hose);
hose->bus = bus;
need_domain_info = need_domain_info || hose->index;
hose->need_domain_info = need_domain_info;
if (bus) {
next_busno = bus->subordinate + 1;
/* Don't allow 8-bit bus number overflow inside the hose -
reserve some space for bridges. */
if (next_busno > 224)
if (next_busno > 224) {
next_busno = 0;
need_domain_info = 1;
}
pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
@ -307,9 +314,15 @@ static void __iomem *ioport_map_pci(struct pci_dev *dev,
{
struct pci_channel *chan = dev->sysdata;
if (!chan->io_map_base)
if (unlikely(!chan->io_map_base)) {
chan->io_map_base = generic_io_base;
if (pci_domains_supported)
panic("To avoid data corruption io_map_base MUST be "
"set with multiple PCI domains.");
}
return (void __iomem *)(chan->io_map_base + port);
}

13
arch/sh/include/asm/pci.h
View File

@ -15,6 +15,7 @@
*/
struct pci_channel {
struct pci_channel *next;
struct pci_bus *bus;
struct pci_ops *pci_ops;
struct resource *io_resource;
@ -24,8 +25,10 @@ struct pci_channel {
unsigned long mem_offset;
unsigned long reg_base;
unsigned long io_map_base;
unsigned int index;
unsigned int need_domain_info;
};
extern void register_pci_controller(struct pci_channel *hose);
@ -108,6 +111,14 @@ extern void pcibios_resource_to_bus(struct pci_dev *dev,
extern void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
struct pci_bus_region *region);
#define pci_domain_nr(bus) ((struct pci_channel *)(bus)->sysdata)->index
static inline int pci_proc_domain(struct pci_bus *bus)
{
struct pci_channel *hose = bus->sysdata;
return hose->need_domain_info;
}
/* Chances are this interrupt is wired PC-style ... */
static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
{