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x86: Move pci init function to x86_init

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The PCI initialization in pci_subsys_init() is a mess. pci_numaq_init,
pci_acpi_init, pci_visws_init and pci_legacy_init are called and each
implementation checks and eventually modifies the global variable
pcibios_scanned.

x86_init functions allow us to do this more elegant. The pci.init
function pointer is preset to pci_legacy_init. numaq, acpi and visws
can modify the pointer in their early setup functions. The functions
return 0 when they did the full initialization including bus scan. A
non zero return value indicates that pci_legacy_init needs to be
called either because the selected function failed or wants the
generic bus scan in pci_legacy_init to happen (e.g. visws).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <43F901BD926A4E43B106BF17856F07559FB80CFE@orsmsx508.amr.corp.intel.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Jacob Pan <jacob.jun.pan@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Thomas Gleixner
2009-08-29 16:24:51 +02:00
committed by H. Peter Anvin
parent cf4c43dd43
commit b72d0db9dd
15 changed files with 53 additions and 46 deletions
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9
arch/x86/include/asm/x86_init.h
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@ -98,6 +98,14 @@ struct x86_init_iommu {
int (*iommu_init)(void);
};
/*
* struct x86_init_pci - platform specific pci init functions
* @init: platform specific pci init
*/
struct x86_init_pci {
int (*init)(void);
};
/**
* struct x86_init_ops - functions for platform specific setup
*
@ -110,6 +118,7 @@ struct x86_init_ops {
struct x86_init_paging paging;
struct x86_init_timers timers;
struct x86_init_iommu iommu;
struct x86_init_pci pci;
};
/**