| /linux-2.4.37.9/arch/mips/vr41xx/common/ |
| D | pciu.h | 75 static inline int pciu_read_config_byte(int where, uint8_t *val) in pciu_read_config_byte() argument
79 if (where > 0xff) in pciu_read_config_byte()
82 data = readl(VENDORIDREG + (where & 0xfc)); in pciu_read_config_byte()
83 *val = (uint8_t)(data >> ((where & 3) << 3)); in pciu_read_config_byte()
88 static inline int pciu_read_config_word(int where, uint16_t *val) in pciu_read_config_word() argument
92 if (where > 0xff || (where & 1)) in pciu_read_config_word()
95 data = readl(VENDORIDREG + (where & 0xfc)); in pciu_read_config_word()
96 *val = (uint16_t)(data >> ((where & 2) << 3)); in pciu_read_config_word()
101 static inline int pciu_read_config_dword(int where, uint32_t *val) in pciu_read_config_dword() argument
103 if (where > 0xff || (where & 3)) in pciu_read_config_dword()
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| D | pciu.c | 30 static inline int vr41xx_pci_config_access(struct pci_dev *dev, int where) in vr41xx_pci_config_access() argument
39 if (PCI_SLOT(dev_fn) < 11 || PCI_SLOT(dev_fn) > 31 || where > 0xff) in vr41xx_pci_config_access()
44 (where & 0xfc), in vr41xx_pci_config_access()
50 if (PCI_SLOT(dev_fn) > 31 || where > 0xff) in vr41xx_pci_config_access()
55 (where & 0xfc) | in vr41xx_pci_config_access()
63 static int vr41xx_pci_config_read_byte(struct pci_dev *dev, int where, uint8_t *val) in vr41xx_pci_config_read_byte() argument
68 if (vr41xx_pci_config_access(dev, where) < 0) in vr41xx_pci_config_read_byte()
72 *val = (uint8_t)(data >> ((where & 3) << 3)); in vr41xx_pci_config_read_byte()
78 static int vr41xx_pci_config_read_word(struct pci_dev *dev, int where, uint16_t *val) in vr41xx_pci_config_read_word() argument
83 if (where & 1) in vr41xx_pci_config_read_word()
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| /linux-2.4.37.9/arch/mips/ite-boards/generic/ |
| D | it8172_pci.c | 91 unsigned char where, u32 *data) in it8172_pcibios_config_access() argument
104 (dev_fn << IT_FUNCNUM_SHF) | (where & ~0x3)); in it8172_pcibios_config_access()
128 read_config_byte (struct pci_dev *dev, int where, u8 *val) in read_config_byte() argument
132 if (it8172_pcibios_config_access(PCI_ACCESS_READ, dev, where, &data)) in read_config_byte()
135 *val = (data >> ((where & 3) << 3)) & 0xff; in read_config_byte()
137 dev->bus->number, dev->devfn, where, *val); in read_config_byte()
144 read_config_word (struct pci_dev *dev, int where, u16 *val) in read_config_word() argument
148 if (where & 1) in read_config_word()
151 if (it8172_pcibios_config_access(PCI_ACCESS_READ, dev, where, &data)) in read_config_word()
154 *val = (data >> ((where & 3) << 3)) & 0xffff; in read_config_word()
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| /linux-2.4.37.9/arch/mips/pci/ |
| D | ops-msc.c | 42 struct pci_dev *dev, unsigned char where, u32 *data) in msc_config_access() argument
67 ((where /4 ) << MSC01_PCI_CFGADDR_RNUM_SHF) | in msc_config_access()
99 static int msc_read_config_byte (struct pci_dev *dev, int where, in msc_read_config_byte() argument
104 if (msc_config_access(PCI_ACCESS_READ, dev, where, &data)) in msc_read_config_byte()
107 *val = (data >> ((where & 3) << 3)) & 0xff; in msc_read_config_byte()
112 static int msc_read_config_word (struct pci_dev *dev, int where, in msc_read_config_word() argument
117 if (where & 1) in msc_read_config_word()
120 if (msc_config_access(PCI_ACCESS_READ, dev, where, &data)) in msc_read_config_word()
123 *val = (data >> ((where & 3) << 3)) & 0xffff; in msc_read_config_word()
128 static int msc_read_config_dword (struct pci_dev *dev, int where, in msc_read_config_dword() argument
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| D | ops-sni.c | 18 #define mkaddr(dev, where) \ argument
25 (where & 0xfc); \
33 int where, unsigned char *val) in pcimt_read_config_byte() argument
37 mkaddr(dev, where); in pcimt_read_config_byte()
39 res = (le32_to_cpu(res) >> ((where & 3) << 3)) & 0xff; in pcimt_read_config_byte()
46 int where, unsigned short *val) in pcimt_read_config_word() argument
50 if (where & 1) in pcimt_read_config_word()
52 mkaddr(dev, where); in pcimt_read_config_word()
54 res = (le32_to_cpu(res) >> ((where & 3) << 3)) & 0xffff; in pcimt_read_config_word()
61 int where, unsigned int *val) in pcimt_read_config_dword() argument
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| D | ops-bonito64.c | 42 struct pci_dev *dev, unsigned char where, u32 *data) in bonito64_config_access() argument
74 pci_addr |= (where & ~0x3) << PCI_CFG_TYPE0_REG_SHF; in bonito64_config_access()
122 static int bonito64_read_config_byte (struct pci_dev *dev, int where, in bonito64_read_config_byte() argument
127 if (bonito64_config_access(PCI_ACCESS_READ, dev, where, &data)) in bonito64_read_config_byte()
130 *val = (data >> ((where & 3) << 3)) & 0xff; in bonito64_read_config_byte()
135 static int bonito64_read_config_word (struct pci_dev *dev, int where, in bonito64_read_config_word() argument
140 if (where & 1) in bonito64_read_config_word()
143 if (bonito64_config_access(PCI_ACCESS_READ, dev, where, &data)) in bonito64_read_config_word()
146 *val = (data >> ((where & 3) << 3)) & 0xffff; in bonito64_read_config_word()
151 static int bonito64_read_config_dword (struct pci_dev *dev, int where, in bonito64_read_config_dword() argument
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| D | ops-gt64120.c | 43 struct pci_dev *dev, unsigned char where, u32 *data) in gt64120_config_access() argument
64 (where & ~0x3) | in gt64120_config_access()
109 static int gt64120_read_config_byte (struct pci_dev *dev, int where, u8 *val) in gt64120_read_config_byte() argument
113 if (gt64120_config_access(PCI_ACCESS_READ, dev, where, &data)) in gt64120_read_config_byte()
116 *val = data >> ((where & 3) << 3); in gt64120_read_config_byte()
121 static int gt64120_read_config_word (struct pci_dev *dev, int where, u16 *val) in gt64120_read_config_word() argument
125 if (where & 1) in gt64120_read_config_word()
128 if (gt64120_config_access(PCI_ACCESS_READ, dev, where, &data)) in gt64120_read_config_word()
131 *val = data >> ((where & 3) << 3); in gt64120_read_config_word()
136 static int gt64120_read_config_dword (struct pci_dev *dev, int where, u32 *val) in gt64120_read_config_dword() argument
[all …]
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| /linux-2.4.37.9/arch/arm/kernel/ |
| D | via82c505.c | 18 #define CONFIG_CMD(dev, where) (0x80000000 | (dev->bus->number << 16) | (dev->devfn << 8) | (wher… argument
21 via82c505_read_config_byte(struct pci_dev *dev, int where, u8 *value) in via82c505_read_config_byte() argument
23 outl(CONFIG_CMD(dev,where),0xCF8); in via82c505_read_config_byte()
24 *value=inb(0xCFC + (where&3)); in via82c505_read_config_byte()
29 via82c505_read_config_word(struct pci_dev *dev, int where, u16 *value) in via82c505_read_config_word() argument
31 outl(CONFIG_CMD(dev,where),0xCF8); in via82c505_read_config_word()
32 *value=inw(0xCFC + (where&2)); in via82c505_read_config_word()
37 via82c505_read_config_dword(struct pci_dev *dev, int where, u32 *value) in via82c505_read_config_dword() argument
39 outl(CONFIG_CMD(dev,where),0xCF8); in via82c505_read_config_dword()
45 via82c505_write_config_byte(struct pci_dev *dev, int where, u8 value) in via82c505_write_config_byte() argument
[all …]
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| /linux-2.4.37.9/arch/mips/tx4927/toshiba_rbtx4927/ |
| D | toshiba_rbtx4927_pci_ops.c | 76 mkaddr(unsigned char bus, unsigned char dev_fn, unsigned char where, in mkaddr() argument
82 ((dev_fn & 0xff) << 0x08) | (where & 0xfc) | 1; in mkaddr()
89 ((dev_fn & 0xff) << 0x08) | (where & 0xfc); in mkaddr()
120 int where, unsigned char *val) in tx4927_pcibios_read_config_byte() argument
125 db_assert((where & 3) == 0); in tx4927_pcibios_read_config_byte()
126 db_assert(where < (1 << 8)); in tx4927_pcibios_read_config_byte()
137 if (mkaddr(bus, dev->devfn, where, &flags)) in tx4927_pcibios_read_config_byte()
142 g2pcfgdata | ((where & 3) ^ 3)); in tx4927_pcibios_read_config_byte()
146 g2pcfgdata | (where & 3)); in tx4927_pcibios_read_config_byte()
156 int where, unsigned short *val) in tx4927_pcibios_read_config_word() argument
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| /linux-2.4.37.9/arch/mips/sibyte/sb1250/ |
| D | pci.c | 48 #define CFGOFFSET(bus,devfn,where) (((bus)<<16)+((devfn)<<8)+(where)) argument
49 #define CFGADDR(dev,where) CFGOFFSET((dev)->bus->number,(dev)->devfn,where) argument
115 sb1250_pci_read_config_byte(struct pci_dev *dev, int where, u8 * val) in sb1250_pci_read_config_byte() argument
118 u32 cfgaddr = CFGADDR(dev, where); in sb1250_pci_read_config_byte()
125 *val = (data >> ((where & 3) << 3)) & 0xff; in sb1250_pci_read_config_byte()
131 sb1250_pci_read_config_word(struct pci_dev *dev, int where, u16 * val) in sb1250_pci_read_config_word() argument
134 u32 cfgaddr = CFGADDR(dev, where); in sb1250_pci_read_config_word()
136 if (where & 1) in sb1250_pci_read_config_word()
144 *val = (data >> ((where & 3) << 3)) & 0xffff; in sb1250_pci_read_config_word()
150 sb1250_pci_read_config_dword(struct pci_dev *dev, int where, u32 * val) in sb1250_pci_read_config_dword() argument
[all …]
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| /linux-2.4.37.9/fs/xfs/ |
| D | xfs_dir2_trace.h | 58 void xfs_dir2_trace_args(char *where, struct xfs_da_args *args);
59 void xfs_dir2_trace_args_b(char *where, struct xfs_da_args *args,
61 void xfs_dir2_trace_args_bb(char *where, struct xfs_da_args *args,
63 void xfs_dir2_trace_args_bibii(char *where, struct xfs_da_args *args,
66 void xfs_dir2_trace_args_db(char *where, struct xfs_da_args *args,
68 void xfs_dir2_trace_args_i(char *where, struct xfs_da_args *args, xfs_ino_t i);
69 void xfs_dir2_trace_args_s(char *where, struct xfs_da_args *args, int s);
70 void xfs_dir2_trace_args_sb(char *where, struct xfs_da_args *args, int s,
75 #define xfs_dir2_trace_args(where, args) argument
76 #define xfs_dir2_trace_args_b(where, args, bp) argument
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| D | xfs_dir2_trace.c | 62 char *where, in xfs_dir2_trace_enter() argument
83 (void *)(long)type, (void *)where, in xfs_dir2_trace_enter()
90 (void *)(long)type, (void *)where, in xfs_dir2_trace_enter()
100 char *where, in xfs_dir2_trace_args() argument
103 xfs_dir2_trace_enter(args->dp, XFS_DIR2_KTRACE_ARGS, where, in xfs_dir2_trace_args()
114 char *where, in xfs_dir2_trace_args_b() argument
118 xfs_dir2_trace_enter(args->dp, XFS_DIR2_KTRACE_ARGS_B, where, in xfs_dir2_trace_args_b()
130 char *where, in xfs_dir2_trace_args_bb() argument
135 xfs_dir2_trace_enter(args->dp, XFS_DIR2_KTRACE_ARGS_BB, where, in xfs_dir2_trace_args_bb()
148 char *where, in xfs_dir2_trace_args_bibii() argument
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| /linux-2.4.37.9/arch/mips/au1000/common/ |
| D | pci_ops.c | 92 unsigned char where, u32 * data) in config_access() argument
103 config = PCI_CONFIG_BASE | (where & ~0x3); in config_access()
113 access_type, bus, dev_fn, where, *data, config); in config_access()
163 unsigned char where, u32 * data) in config_access() argument
228 offset = (function << 8) | (where & ~0x3); in config_access()
253 access_type, bus, device, where, *data, offset); in config_access()
279 static int read_config_byte(struct pci_dev *dev, int where, u8 * val) in read_config_byte() argument
284 ret = config_access(PCI_ACCESS_READ, dev, where, &data); in read_config_byte()
285 if (where & 1) data >>= 8; in read_config_byte()
286 if (where & 2) data >>= 16; in read_config_byte()
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| /linux-2.4.37.9/arch/mips/hp-lj/ |
| D | pci.c | 26 #define cfgaddr(dev, where) (((dev->bus->number & 0xff) << 0x10) | \ argument
28 (where & 0xfc))
35 int where, unsigned char *val) in pcimt_read_config_byte() argument
37 *pci_config_address_reg = cfgaddr(dev, where); in pcimt_read_config_byte()
38 *val = (le32_to_cpu(*pci_config_data_reg) >> ((where&3)<<3)) & 0xff; in pcimt_read_config_byte()
44 int where, unsigned short *val) in pcimt_read_config_word() argument
46 if (where & 1) in pcimt_read_config_word()
48 *pci_config_address_reg = cfgaddr(dev, where); in pcimt_read_config_word()
49 *val = (le32_to_cpu(*pci_config_data_reg) >> ((where&3)<<3)) & 0xffff; in pcimt_read_config_word()
55 int where, unsigned int *val) in pcimt_read_config_dword() argument
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| /linux-2.4.37.9/arch/mips/ddb5xxx/ddb5074/ |
| D | pci_ops.c | 128 u32 where, in read_config_dword() argument
134 db_assert((where & 3) == 0); in read_config_dword()
135 db_assert(where < (1 << 8)); in read_config_dword()
148 *val = *(volatile u32*) (base + (func_num << 8) + where); in read_config_dword()
155 u32 where, in read_config_word() argument
161 db_assert((where & 1) == 0); in read_config_word()
163 status = read_config_dword(swap, dev, where & ~3, &result); in read_config_word()
164 if (where & 2) result >>= 16; in read_config_word()
171 u32 where, in read_config_byte() argument
177 status = read_config_dword(swap, dev, where & ~3, &result); in read_config_byte()
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| /linux-2.4.37.9/arch/mips/ddb5xxx/ddb5476/ |
| D | pci_ops.c | 131 u32 where, in read_config_dword() argument
137 db_assert((where & 3) == 0); in read_config_dword()
138 db_assert(where < (1 << 8)); in read_config_dword()
151 *val = *(volatile u32*) (base + (func_num << 8) + where); in read_config_dword()
158 u32 where, in read_config_word() argument
164 db_assert((where & 1) == 0); in read_config_word()
166 status = read_config_dword(swap, dev, where & ~3, &result); in read_config_word()
167 if (where & 2) result >>= 16; in read_config_word()
174 u32 where, in read_config_byte() argument
180 status = read_config_dword(swap, dev, where & ~3, &result); in read_config_byte()
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| /linux-2.4.37.9/arch/i386/kernel/ |
| D | pci-visws.c | 27 #define CONFIG_CMD(dev, where) (0x80000000 | (dev->bus->number << 16) | (dev->devfn << 8) | (wher… argument
29 static int pci_conf1_read_config_byte(struct pci_dev *dev, int where, u8 *value) in pci_conf1_read_config_byte() argument
31 outl(CONFIG_CMD(dev,where), 0xCF8); in pci_conf1_read_config_byte()
32 *value = inb(0xCFC + (where&3)); in pci_conf1_read_config_byte()
36 static int pci_conf1_read_config_word(struct pci_dev *dev, int where, u16 *value) in pci_conf1_read_config_word() argument
38 outl(CONFIG_CMD(dev,where), 0xCF8); in pci_conf1_read_config_word()
39 *value = inw(0xCFC + (where&2)); in pci_conf1_read_config_word()
43 static int pci_conf1_read_config_dword(struct pci_dev *dev, int where, u32 *value) in pci_conf1_read_config_dword() argument
45 outl(CONFIG_CMD(dev,where), 0xCF8); in pci_conf1_read_config_dword()
50 static int pci_conf1_write_config_byte(struct pci_dev *dev, int where, u8 value) in pci_conf1_write_config_byte() argument
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| /linux-2.4.37.9/arch/mips/ddb5xxx/ddb5477/ |
| D | pci_ops.c | 136 u32 where, in read_config_dword() argument
142 db_assert((where & 3) == 0); in read_config_dword()
143 db_assert(where < (1 << 8)); in read_config_dword()
156 *val = *(volatile u32*) (base + (func_num << 8) + where); in read_config_dword()
163 u32 where, in read_config_word() argument
169 db_assert((where & 1) == 0); in read_config_word()
171 status = read_config_dword(swap, dev, where & ~3, &result); in read_config_word()
172 if (where & 2) result >>= 16; in read_config_word()
179 u32 where, in read_config_byte() argument
185 status = read_config_dword(swap, dev, where & ~3, &result); in read_config_byte()
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| /linux-2.4.37.9/drivers/hotplug/ |
| D | pci_hotplug_util.c | 81 int pci_bus_read_config_byte (struct pci_bus *bus, unsigned int devfn, int where, u8 *value) in pci_bus_read_config_byte() argument
86 dbg("%p, %d, %d, %p\n", bus, devfn, where, value); in pci_bus_read_config_byte()
90 return pci_read_config_byte (dev, where, value); in pci_bus_read_config_byte()
96 result = pci_read_config_byte(dev, where, value); in pci_bus_read_config_byte()
112 int pci_bus_read_config_word (struct pci_bus *bus, unsigned int devfn, int where, u16 *value) in pci_bus_read_config_word() argument
117 dbg("%p, %d, %d, %p\n", bus, devfn, where, value); in pci_bus_read_config_word()
121 return pci_read_config_word (dev, where, value); in pci_bus_read_config_word()
127 result = pci_read_config_word(dev, where, value); in pci_bus_read_config_word()
143 int pci_bus_read_config_dword (struct pci_bus *bus, unsigned int devfn, int where, u32 *value) in pci_bus_read_config_dword() argument
148 dbg("%p, %d, %d, %p\n", bus, devfn, where, value); in pci_bus_read_config_dword()
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| /linux-2.4.37.9/drivers/video/ |
| D | fbcon-vga-planes.c | 156 char *where; in fbcon_vga_planes_clear() local
170 where = p->screen_base + sx + sy * p->line_length; in fbcon_vga_planes_clear()
173 writeb(0, where); in fbcon_vga_planes_clear()
174 where++; in fbcon_vga_planes_clear()
176 where += line_ofs; in fbcon_vga_planes_clear()
187 char *where = p->screen_base + xx + yy * p->line_length * fontheight(p); in fbcon_ega_planes_putc() local
196 for (y = 0; y < fontheight(p); y++, where += p->line_length) in fbcon_ega_planes_putc()
197 rmw(where); in fbcon_ega_planes_putc()
199 where -= p->line_length * y; in fbcon_ega_planes_putc()
202 for (y = 0; y < fontheight(p); y++, where += p->line_length) in fbcon_ega_planes_putc()
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| /linux-2.4.37.9/arch/m68k/atari/ |
| D | hades-pci.c | 64 static void *mk_conf_addr(struct pci_dev *dev, int where) in mk_conf_addr() argument
70 dev->bus->number, dev->devfn, where, pci_addr)); in mk_conf_addr()
84 result = (void *) (pci_conf_base_virt[device] | (function << 8) | (where)); in mk_conf_addr()
89 static int hades_read_config_byte(struct pci_dev *dev, int where, u8 *value) in hades_read_config_byte() argument
95 if ((pci_addr = (unsigned char *) mk_conf_addr(dev, where)) == NULL) in hades_read_config_byte()
103 static int hades_read_config_word(struct pci_dev *dev, int where, u16 *value) in hades_read_config_word() argument
109 if (where & 0x1) in hades_read_config_word()
112 if ((pci_addr = (unsigned short *) mk_conf_addr(dev, where)) == NULL) in hades_read_config_word()
120 static int hades_read_config_dword(struct pci_dev *dev, int where, u32 *value) in hades_read_config_dword() argument
128 if (where & 0x3) in hades_read_config_dword()
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| /linux-2.4.37.9/arch/alpha/kernel/ |
| D | core_polaris.c | 68 mk_conf_addr(struct pci_dev *dev, int where, unsigned long *pci_addr, u8 *type1) in mk_conf_addr() argument
74 *pci_addr = (bus << 16) | (device_fn << 8) | (where) | in mk_conf_addr()
79 bus, device_fn, where, *pci_addr)); in mk_conf_addr()
85 polaris_read_config_byte(struct pci_dev *dev, int where, u8 *value) in polaris_read_config_byte() argument
90 if (mk_conf_addr(dev, where, &pci_addr, &type1)) in polaris_read_config_byte()
98 polaris_read_config_word(struct pci_dev *dev, int where, u16 *value) in polaris_read_config_word() argument
103 if (mk_conf_addr(dev, where, &pci_addr, &type1)) in polaris_read_config_word()
111 polaris_read_config_dword(struct pci_dev *dev, int where, u32 *value) in polaris_read_config_dword() argument
116 if (mk_conf_addr(dev, where, &pci_addr, &type1)) in polaris_read_config_dword()
124 polaris_write_config_byte(struct pci_dev *dev, int where, u8 value) in polaris_write_config_byte() argument
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| D | core_apecs.c | 93 mk_conf_addr(struct pci_dev *dev, int where, unsigned long *pci_addr, in mk_conf_addr() argument
102 bus, device_fn, where, pci_addr, type1)); in mk_conf_addr()
116 addr = (device_fn << 8) | (where); in mk_conf_addr()
120 addr = (bus << 16) | (device_fn << 8) | (where); in mk_conf_addr()
276 apecs_read_config_byte(struct pci_dev *dev, int where, u8 *value) in apecs_read_config_byte() argument
281 if (mk_conf_addr(dev, where, &pci_addr, &type1)) in apecs_read_config_byte()
285 *value = conf_read(addr, type1) >> ((where & 3) * 8); in apecs_read_config_byte()
290 apecs_read_config_word(struct pci_dev *dev, int where, u16 *value) in apecs_read_config_word() argument
295 if (mk_conf_addr(dev, where, &pci_addr, &type1)) in apecs_read_config_word()
299 *value = conf_read(addr, type1) >> ((where & 3) * 8); in apecs_read_config_word()
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| /linux-2.4.37.9/arch/mips/cobalt/ |
| D | pci.c | 270 #define PCI_CFG_SET(dev,where) \ argument
272 (where)), GT_PCI0_CFGADDR_OFS)
275 int where, in qube_pci_read_config_dword() argument
278 if (where & 0x3) in qube_pci_read_config_dword()
284 PCI_CFG_SET(dev, where); in qube_pci_read_config_dword()
290 int where, in qube_pci_read_config_word() argument
293 if (where & 0x1) in qube_pci_read_config_word()
299 PCI_CFG_SET(dev, (where & ~0x3)); in qube_pci_read_config_word()
300 *val = GALILEO_INL(GT_PCI0_CFGDATA_OFS) >> ((where & 3) * 8); in qube_pci_read_config_word()
305 int where, in qube_pci_read_config_byte() argument
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| /linux-2.4.37.9/arch/mips/jmr3927/rbhma3100/ |
| D | pci_ops.c | 71 mkaddr(unsigned char bus, unsigned char dev_fn, unsigned char where, int *flagsp) in mkaddr() argument
78 (where & 0xfc); in mkaddr()
102 int where, in jmr3927_pcibios_read_config_byte() argument
108 db_assert((where & 3) == 0); in jmr3927_pcibios_read_config_byte()
109 db_assert(where < (1 << 8)); in jmr3927_pcibios_read_config_byte()
120 if (mkaddr(bus, dev->devfn, where, &flags)) in jmr3927_pcibios_read_config_byte()
122 *val = *(volatile u8 *)((ulong)&tx3927_pcicptr->icd | (where&3)); in jmr3927_pcibios_read_config_byte()
127 int where, in jmr3927_pcibios_read_config_word() argument
133 if (where & 1) in jmr3927_pcibios_read_config_word()
136 db_assert((where & 3) == 0); in jmr3927_pcibios_read_config_word()
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