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| author | jayalk@intworks.biz <jayalk@intworks.biz> | 2005-03-21 20:20:42 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2005-06-27 21:52:38 -0700 |
| commit | 120bb4246a99cc6e9cc976573fcbcd0ee9d544ef (patch) | |
| tree | d447957833d89dbd049259f813530fa8cc81d206 /arch/i386/pci/common.c | |
| parent | 020f46a39eb7b99a575b9f4d105fce2b142acdf1 (diff) | |
| download | linux-120bb4246a99cc6e9cc976573fcbcd0ee9d544ef.tar.gz | |
[PATCH] PCI Allow OutOfRange PIRQ table address
I updated this to remove unnecessary variable initialization, make
check_routing be inline only and not __init, switch to strtoul, and
formatting fixes as per Randy Dunlap's recommendations.
I updated this to change pirq_table_addr to a long, and to add a warning
msg if the PIRQ table wasn't found at the specified address, as per thread
with Matthew Wilcox.
In our hardware situation, the BIOS is unable to store or generate it's PIRQ
table in the F0000h-100000h standard range. This patch adds a pci kernel
parameter, pirqaddr to allow the bootloader (or BIOS based loader) to inform
the kernel where the PIRQ table got stored. A beneficial side-effect is that,
if one's BIOS uses a static address each time for it's PIRQ table, then
pirqaddr can be used to avoid the $pirq search through that address block each
time at boot for normal PIRQ BIOSes.
Signed-off-by: Jaya Kumar <jayalk@intworks.biz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch/i386/pci/common.c')
| -rw-r--r-- | arch/i386/pci/common.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/i386/pci/common.c b/arch/i386/pci/common.c index 720975e1af504..2a2e79fbfef80 100644 --- a/arch/i386/pci/common.c +++ b/arch/i386/pci/common.c @@ -25,7 +25,8 @@ unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 | int pci_routeirq; int pcibios_last_bus = -1; -struct pci_bus *pci_root_bus = NULL; +unsigned long pirq_table_addr; +struct pci_bus *pci_root_bus; struct pci_raw_ops *raw_pci_ops; static int pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value) @@ -188,6 +189,9 @@ char * __devinit pcibios_setup(char *str) } else if (!strcmp(str, "biosirq")) { pci_probe |= PCI_BIOS_IRQ_SCAN; return NULL; + } else if (!strncmp(str, "pirqaddr=", 9)) { + pirq_table_addr = simple_strtoul(str+9, NULL, 0); + return NULL; } #endif #ifdef CONFIG_PCI_DIRECT |