2bdd1b031b
Previously, one would have to specifically choose CONFIG_OLPC and CONFIG_PCI_GOOLPC in order to enable PCI_OLPC. That doesn't really work for distro kernels, so this patch allows one to choose CONFIG_OLPC and CONFIG_PCI_GOANY in order to build in OLPC support in a generic kernel (as requested by Robert Millan). This also moves GOOLPC before GOANY in the menuconfig list. Finally, make pci_access_init return early if we detect OLPC hardware. There's no need to continue probing stuff, and pci_pcbios_init specifically trashes our settings (we didn't run into that before because PCI_GOANY wasn't supported). Signed-off-by: Andres Salomon <dilinger@debian.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
152 lines
3.9 KiB
C
152 lines
3.9 KiB
C
/*
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* Low-Level PCI Access for i386 machines.
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*
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* (c) 1999 Martin Mares <mj@ucw.cz>
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*/
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#undef DEBUG
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#ifdef DEBUG
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#define DBG(x...) printk(x)
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#else
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#define DBG(x...)
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#endif
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#define PCI_PROBE_BIOS 0x0001
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#define PCI_PROBE_CONF1 0x0002
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#define PCI_PROBE_CONF2 0x0004
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#define PCI_PROBE_MMCONF 0x0008
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#define PCI_PROBE_MASK 0x000f
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#define PCI_PROBE_NOEARLY 0x0010
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#define PCI_NO_CHECKS 0x0400
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#define PCI_USE_PIRQ_MASK 0x0800
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#define PCI_ASSIGN_ROMS 0x1000
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#define PCI_BIOS_IRQ_SCAN 0x2000
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#define PCI_ASSIGN_ALL_BUSSES 0x4000
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#define PCI_CAN_SKIP_ISA_ALIGN 0x8000
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#define PCI_USE__CRS 0x10000
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#define PCI_CHECK_ENABLE_AMD_MMCONF 0x20000
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extern unsigned int pci_probe;
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extern unsigned long pirq_table_addr;
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enum pci_bf_sort_state {
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pci_bf_sort_default,
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pci_force_nobf,
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pci_force_bf,
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pci_dmi_bf,
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};
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extern void __init dmi_check_pciprobe(void);
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extern void __init dmi_check_skip_isa_align(void);
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/* pci-i386.c */
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extern unsigned int pcibios_max_latency;
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void pcibios_resource_survey(void);
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/* pci-pc.c */
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extern int pcibios_last_bus;
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extern struct pci_bus *pci_root_bus;
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extern struct pci_ops pci_root_ops;
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/* pci-irq.c */
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struct irq_info {
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u8 bus, devfn; /* Bus, device and function */
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struct {
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u8 link; /* IRQ line ID, chipset dependent, 0=not routed */
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u16 bitmap; /* Available IRQs */
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} __attribute__((packed)) irq[4];
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u8 slot; /* Slot number, 0=onboard */
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u8 rfu;
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} __attribute__((packed));
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struct irq_routing_table {
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u32 signature; /* PIRQ_SIGNATURE should be here */
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u16 version; /* PIRQ_VERSION */
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u16 size; /* Table size in bytes */
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u8 rtr_bus, rtr_devfn; /* Where the interrupt router lies */
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u16 exclusive_irqs; /* IRQs devoted exclusively to PCI usage */
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u16 rtr_vendor, rtr_device; /* Vendor and device ID of interrupt router */
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u32 miniport_data; /* Crap */
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u8 rfu[11];
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u8 checksum; /* Modulo 256 checksum must give zero */
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struct irq_info slots[0];
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} __attribute__((packed));
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extern unsigned int pcibios_irq_mask;
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extern int pcibios_scanned;
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extern spinlock_t pci_config_lock;
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extern int (*pcibios_enable_irq)(struct pci_dev *dev);
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extern void (*pcibios_disable_irq)(struct pci_dev *dev);
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struct pci_raw_ops {
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int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
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int reg, int len, u32 *val);
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int (*write)(unsigned int domain, unsigned int bus, unsigned int devfn,
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int reg, int len, u32 val);
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};
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extern struct pci_raw_ops *raw_pci_ops;
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extern struct pci_raw_ops *raw_pci_ext_ops;
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extern struct pci_raw_ops pci_direct_conf1;
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extern int pci_direct_probe(void);
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extern void pci_direct_init(int type);
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extern void pci_pcbios_init(void);
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extern int pci_olpc_init(void);
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/* pci-mmconfig.c */
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extern int __init pci_mmcfg_arch_init(void);
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extern void __init pci_mmcfg_arch_free(void);
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/*
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* AMD Fam10h CPUs are buggy, and cannot access MMIO config space
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* on their northbrige except through the * %eax register. As such, you MUST
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* NOT use normal IOMEM accesses, you need to only use the magic mmio-config
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* accessor functions.
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* In fact just use pci_config_*, nothing else please.
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*/
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static inline unsigned char mmio_config_readb(void __iomem *pos)
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{
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u8 val;
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asm volatile("movb (%1),%%al" : "=a" (val) : "r" (pos));
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return val;
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}
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static inline unsigned short mmio_config_readw(void __iomem *pos)
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{
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u16 val;
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asm volatile("movw (%1),%%ax" : "=a" (val) : "r" (pos));
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return val;
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}
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static inline unsigned int mmio_config_readl(void __iomem *pos)
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{
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u32 val;
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asm volatile("movl (%1),%%eax" : "=a" (val) : "r" (pos));
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return val;
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}
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static inline void mmio_config_writeb(void __iomem *pos, u8 val)
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{
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asm volatile("movb %%al,(%1)" :: "a" (val), "r" (pos) : "memory");
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}
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static inline void mmio_config_writew(void __iomem *pos, u16 val)
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{
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asm volatile("movw %%ax,(%1)" :: "a" (val), "r" (pos) : "memory");
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}
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static inline void mmio_config_writel(void __iomem *pos, u32 val)
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{
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asm volatile("movl %%eax,(%1)" :: "a" (val), "r" (pos) : "memory");
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}
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