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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Low-Level PCI Access for i386 machines. | |
3 | * | |
4 | * (c) 1999 Martin Mares <mj@ucw.cz> | |
5 | */ | |
6 | ||
7 | #undef DEBUG | |
8 | ||
9 | #ifdef DEBUG | |
10 | #define DBG(x...) printk(x) | |
11 | #else | |
12 | #define DBG(x...) | |
13 | #endif | |
14 | ||
15 | #define PCI_PROBE_BIOS 0x0001 | |
16 | #define PCI_PROBE_CONF1 0x0002 | |
17 | #define PCI_PROBE_CONF2 0x0004 | |
18 | #define PCI_PROBE_MMCONF 0x0008 | |
79e453d4 | 19 | #define PCI_PROBE_MASK 0x000f |
0637a70a | 20 | #define PCI_PROBE_NOEARLY 0x0010 |
1da177e4 LT |
21 | |
22 | #define PCI_NO_SORT 0x0100 | |
23 | #define PCI_BIOS_SORT 0x0200 | |
24 | #define PCI_NO_CHECKS 0x0400 | |
25 | #define PCI_USE_PIRQ_MASK 0x0800 | |
26 | #define PCI_ASSIGN_ROMS 0x1000 | |
27 | #define PCI_BIOS_IRQ_SCAN 0x2000 | |
28 | #define PCI_ASSIGN_ALL_BUSSES 0x4000 | |
29 | ||
30 | extern unsigned int pci_probe; | |
120bb424 | 31 | extern unsigned long pirq_table_addr; |
1da177e4 | 32 | |
6b4b78fe MD |
33 | enum pci_bf_sort_state { |
34 | pci_bf_sort_default, | |
35 | pci_force_nobf, | |
36 | pci_force_bf, | |
37 | pci_dmi_bf, | |
38 | }; | |
39 | ||
1da177e4 LT |
40 | /* pci-i386.c */ |
41 | ||
42 | extern unsigned int pcibios_max_latency; | |
43 | ||
44 | void pcibios_resource_survey(void); | |
45 | int pcibios_enable_resources(struct pci_dev *, int); | |
46 | ||
47 | /* pci-pc.c */ | |
48 | ||
49 | extern int pcibios_last_bus; | |
50 | extern struct pci_bus *pci_root_bus; | |
51 | extern struct pci_ops pci_root_ops; | |
52 | ||
53 | /* pci-irq.c */ | |
54 | ||
55 | struct irq_info { | |
56 | u8 bus, devfn; /* Bus, device and function */ | |
57 | struct { | |
58 | u8 link; /* IRQ line ID, chipset dependent, 0=not routed */ | |
59 | u16 bitmap; /* Available IRQs */ | |
60 | } __attribute__((packed)) irq[4]; | |
61 | u8 slot; /* Slot number, 0=onboard */ | |
62 | u8 rfu; | |
63 | } __attribute__((packed)); | |
64 | ||
65 | struct irq_routing_table { | |
66 | u32 signature; /* PIRQ_SIGNATURE should be here */ | |
67 | u16 version; /* PIRQ_VERSION */ | |
68 | u16 size; /* Table size in bytes */ | |
69 | u8 rtr_bus, rtr_devfn; /* Where the interrupt router lies */ | |
70 | u16 exclusive_irqs; /* IRQs devoted exclusively to PCI usage */ | |
71 | u16 rtr_vendor, rtr_device; /* Vendor and device ID of interrupt router */ | |
72 | u32 miniport_data; /* Crap */ | |
73 | u8 rfu[11]; | |
74 | u8 checksum; /* Modulo 256 checksum must give zero */ | |
75 | struct irq_info slots[0]; | |
76 | } __attribute__((packed)); | |
77 | ||
78 | extern unsigned int pcibios_irq_mask; | |
79 | ||
80 | extern int pcibios_scanned; | |
81 | extern spinlock_t pci_config_lock; | |
82 | ||
83 | extern int (*pcibios_enable_irq)(struct pci_dev *dev); | |
87bec66b | 84 | extern void (*pcibios_disable_irq)(struct pci_dev *dev); |
928cf8c6 AK |
85 | |
86 | extern int pci_conf1_write(unsigned int seg, unsigned int bus, | |
87 | unsigned int devfn, int reg, int len, u32 value); | |
88 | extern int pci_conf1_read(unsigned int seg, unsigned int bus, | |
89 | unsigned int devfn, int reg, int len, u32 *value); | |
90 | ||
5e544d61 AK |
91 | extern int pci_direct_probe(void); |
92 | extern void pci_direct_init(int type); | |
92c05fc1 | 93 | extern void pci_pcbios_init(void); |
5e544d61 | 94 | extern void pci_mmcfg_init(int type); |
6e233899 | 95 | extern void pcibios_sort(void); |
5e544d61 | 96 | |
b7867394 OG |
97 | /* pci-mmconfig.c */ |
98 | ||
429d512e OH |
99 | /* Verify the first 16 busses. We assume that systems with more busses |
100 | get MCFG right. */ | |
b7867394 OG |
101 | #define PCI_MMCFG_MAX_CHECK_BUS 16 |
102 | extern DECLARE_BITMAP(pci_mmcfg_fallback_slots, 32*PCI_MMCFG_MAX_CHECK_BUS); | |
103 | ||
56829d19 OH |
104 | extern int __init pci_mmcfg_arch_reachable(unsigned int seg, unsigned int bus, |
105 | unsigned int devfn); | |
429d512e | 106 | extern int __init pci_mmcfg_arch_init(void); |
3320ad99 | 107 | |
108 | /* | |
109 | * AMD Fam10h CPUs are buggy, and cannot access MMIO config space | |
110 | * on their northbrige except through the * %eax register. As such, you MUST | |
111 | * NOT use normal IOMEM accesses, you need to only use the magic mmio-config | |
112 | * accessor functions. | |
113 | * In fact just use pci_config_*, nothing else please. | |
114 | */ | |
115 | static inline unsigned char mmio_config_readb(void __iomem *pos) | |
116 | { | |
117 | u8 val; | |
118 | asm volatile("movb (%1),%%al" : "=a" (val) : "r" (pos)); | |
119 | return val; | |
120 | } | |
121 | ||
122 | static inline unsigned short mmio_config_readw(void __iomem *pos) | |
123 | { | |
124 | u16 val; | |
125 | asm volatile("movw (%1),%%ax" : "=a" (val) : "r" (pos)); | |
126 | return val; | |
127 | } | |
128 | ||
129 | static inline unsigned int mmio_config_readl(void __iomem *pos) | |
130 | { | |
131 | u32 val; | |
132 | asm volatile("movl (%1),%%eax" : "=a" (val) : "r" (pos)); | |
133 | return val; | |
134 | } | |
135 | ||
136 | static inline void mmio_config_writeb(void __iomem *pos, u8 val) | |
137 | { | |
138 | asm volatile("movb %%al,(%1)" :: "a" (val), "r" (pos) : "memory"); | |
139 | } | |
140 | ||
141 | static inline void mmio_config_writew(void __iomem *pos, u16 val) | |
142 | { | |
143 | asm volatile("movw %%ax,(%1)" :: "a" (val), "r" (pos) : "memory"); | |
144 | } | |
145 | ||
146 | static inline void mmio_config_writel(void __iomem *pos, u32 val) | |
147 | { | |
148 | asm volatile("movl %%eax,(%1)" :: "a" (val), "r" (pos) : "memory"); | |
149 | } |