1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * bridge.h - bridge chip header file, derived from IRIX <sys/PCI/bridge.h>,
7 * revision 1.76.
8 *
9 * Copyright (C) 1996, 1999 Silcon Graphics, Inc.
10 * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
11 */
12 #ifndef _ASM_PCI_BRIDGE_H
13 #define _ASM_PCI_BRIDGE_H
14
15 #include <linux/types.h>
16 #include <linux/pci.h>
17 #include <asm/xtalk/xwidget.h> /* generic widget header */
18 #include <asm/sn/types.h>
19
20 /* I/O page size */
21
22 #define IOPFNSHIFT 12 /* 4K per mapped page */
23
24 #define IOPGSIZE (1 << IOPFNSHIFT)
25 #define IOPG(x) ((x) >> IOPFNSHIFT)
26 #define IOPGOFF(x) ((x) & (IOPGSIZE-1))
27
28 /* Bridge RAM sizes */
29
30 #define BRIDGE_ATE_RAM_SIZE 0x00000400 /* 1kB ATE RAM */
31
32 #define BRIDGE_CONFIG_BASE 0x20000
33 #define BRIDGE_CONFIG1_BASE 0x28000
34 #define BRIDGE_CONFIG_END 0x30000
35 #define BRIDGE_CONFIG_SLOT_SIZE 0x1000
36
37 #define BRIDGE_SSRAM_512K 0x00080000 /* 512kB */
38 #define BRIDGE_SSRAM_128K 0x00020000 /* 128kB */
39 #define BRIDGE_SSRAM_64K 0x00010000 /* 64kB */
40 #define BRIDGE_SSRAM_0K 0x00000000 /* 0kB */
41
42 /* ========================================================================
43 * Bridge address map
44 */
45
46 #ifndef __ASSEMBLY__
47
48 #define ATE_V 0x01
49 #define ATE_CO 0x02
50 #define ATE_PREC 0x04
51 #define ATE_PREF 0x08
52 #define ATE_BAR 0x10
53
54 #define ATE_PFNSHIFT 12
55 #define ATE_TIDSHIFT 8
56 #define ATE_RMFSHIFT 48
57
58 #define mkate(xaddr, xid, attr) (((xaddr) & 0x0000fffffffff000ULL) | \
59 ((xid)<<ATE_TIDSHIFT) | \
60 (attr))
61
62 #define BRIDGE_INTERNAL_ATES 128
63
64 /*
65 * It is generally preferred that hardware registers on the bridge
66 * are located from C code via this structure.
67 *
68 * Generated from Bridge spec dated 04oct95
69 */
70
71 struct bridge_regs {
72 /* Local Registers 0x000000-0x00FFFF */
73
74 /* standard widget configuration 0x000000-0x000057 */
75 widget_cfg_t b_widget; /* 0x000000 */
76
77 /* helper fieldnames for accessing bridge widget */
78
79 #define b_wid_id b_widget.w_id
80 #define b_wid_stat b_widget.w_status
81 #define b_wid_err_upper b_widget.w_err_upper_addr
82 #define b_wid_err_lower b_widget.w_err_lower_addr
83 #define b_wid_control b_widget.w_control
84 #define b_wid_req_timeout b_widget.w_req_timeout
85 #define b_wid_int_upper b_widget.w_intdest_upper_addr
86 #define b_wid_int_lower b_widget.w_intdest_lower_addr
87 #define b_wid_err_cmdword b_widget.w_err_cmd_word
88 #define b_wid_llp b_widget.w_llp_cfg
89 #define b_wid_tflush b_widget.w_tflush
90
91 /* bridge-specific widget configuration 0x000058-0x00007F */
92 u32 _pad_000058;
93 u32 b_wid_aux_err; /* 0x00005C */
94 u32 _pad_000060;
95 u32 b_wid_resp_upper; /* 0x000064 */
96 u32 _pad_000068;
97 u32 b_wid_resp_lower; /* 0x00006C */
98 u32 _pad_000070;
99 u32 b_wid_tst_pin_ctrl; /* 0x000074 */
100 u32 _pad_000078[2];
101
102 /* PMU & Map 0x000080-0x00008F */
103 u32 _pad_000080;
104 u32 b_dir_map; /* 0x000084 */
105 u32 _pad_000088[2];
106
107 /* SSRAM 0x000090-0x00009F */
108 u32 _pad_000090;
109 u32 b_ram_perr; /* 0x000094 */
110 u32 _pad_000098[2];
111
112 /* Arbitration 0x0000A0-0x0000AF */
113 u32 _pad_0000A0;
114 u32 b_arb; /* 0x0000A4 */
115 u32 _pad_0000A8[2];
116
117 /* Number In A Can 0x0000B0-0x0000BF */
118 u32 _pad_0000B0;
119 u32 b_nic; /* 0x0000B4 */
120 u32 _pad_0000B8[2];
121
122 /* PCI/GIO 0x0000C0-0x0000FF */
123 u32 _pad_0000C0;
124 u32 b_bus_timeout; /* 0x0000C4 */
125 #define b_pci_bus_timeout b_bus_timeout
126
127 u32 _pad_0000C8;
128 u32 b_pci_cfg; /* 0x0000CC */
129 u32 _pad_0000D0;
130 u32 b_pci_err_upper; /* 0x0000D4 */
131 u32 _pad_0000D8;
132 u32 b_pci_err_lower; /* 0x0000DC */
133 u32 _pad_0000E0[8];
134 #define b_gio_err_lower b_pci_err_lower
135 #define b_gio_err_upper b_pci_err_upper
136
137 /* Interrupt 0x000100-0x0001FF */
138 u32 _pad_000100;
139 u32 b_int_status; /* 0x000104 */
140 u32 _pad_000108;
141 u32 b_int_enable; /* 0x00010C */
142 u32 _pad_000110;
143 u32 b_int_rst_stat; /* 0x000114 */
144 u32 _pad_000118;
145 u32 b_int_mode; /* 0x00011C */
146 u32 _pad_000120;
147 u32 b_int_device; /* 0x000124 */
148 u32 _pad_000128;
149 u32 b_int_host_err; /* 0x00012C */
150
151 struct {
152 u32 __pad; /* 0x0001{30,,,68} */
153 u32 addr; /* 0x0001{34,,,6C} */
154 } b_int_addr[8]; /* 0x000130 */
155
156 u32 _pad_000170[36];
157
158 /* Device 0x000200-0x0003FF */
159 struct {
160 u32 __pad; /* 0x0002{00,,,38} */
161 u32 reg; /* 0x0002{04,,,3C} */
162 } b_device[8]; /* 0x000200 */
163
164 struct {
165 u32 __pad; /* 0x0002{40,,,78} */
166 u32 reg; /* 0x0002{44,,,7C} */
167 } b_wr_req_buf[8]; /* 0x000240 */
168
169 struct {
170 u32 __pad; /* 0x0002{80,,,88} */
171 u32 reg; /* 0x0002{84,,,8C} */
172 } b_rrb_map[2]; /* 0x000280 */
173 #define b_even_resp b_rrb_map[0].reg /* 0x000284 */
174 #define b_odd_resp b_rrb_map[1].reg /* 0x00028C */
175
176 u32 _pad_000290;
177 u32 b_resp_status; /* 0x000294 */
178 u32 _pad_000298;
179 u32 b_resp_clear; /* 0x00029C */
180
181 u32 _pad_0002A0[24];
182
183 char _pad_000300[0x10000 - 0x000300];
184
185 /* Internal Address Translation Entry RAM 0x010000-0x0103FF */
186 union {
187 u64 wr; /* write-only */
188 struct {
189 u32 _p_pad;
190 u32 rd; /* read-only */
191 } hi;
192 } b_int_ate_ram[128];
193
194 char _pad_010400[0x11000 - 0x010400];
195
196 /* Internal Address Translation Entry RAM LOW 0x011000-0x0113FF */
197 struct {
198 u32 _p_pad;
199 u32 rd; /* read-only */
200 } b_int_ate_ram_lo[128];
201
202 char _pad_011400[0x20000 - 0x011400];
203
204 /* PCI Device Configuration Spaces 0x020000-0x027FFF */
205 union { /* make all access sizes available. */
206 u8 c[0x1000 / 1];
207 u16 s[0x1000 / 2];
208 u32 l[0x1000 / 4];
209 u64 d[0x1000 / 8];
210 union {
211 u8 c[0x100 / 1];
212 u16 s[0x100 / 2];
213 u32 l[0x100 / 4];
214 u64 d[0x100 / 8];
215 } f[8];
216 } b_type0_cfg_dev[8]; /* 0x020000 */
217
218 /* PCI Type 1 Configuration Space 0x028000-0x028FFF */
219 union { /* make all access sizes available. */
220 u8 c[0x1000 / 1];
221 u16 s[0x1000 / 2];
222 u32 l[0x1000 / 4];
223 u64 d[0x1000 / 8];
224 } b_type1_cfg; /* 0x028000-0x029000 */
225
226 char _pad_029000[0x007000]; /* 0x029000-0x030000 */
227
228 /* PCI Interrupt Acknowledge Cycle 0x030000 */
229 union {
230 u8 c[8 / 1];
231 u16 s[8 / 2];
232 u32 l[8 / 4];
233 u64 d[8 / 8];
234 } b_pci_iack; /* 0x030000 */
235
236 u8 _pad_030007[0x04fff8]; /* 0x030008-0x07FFFF */
237
238 /* External Address Translation Entry RAM 0x080000-0x0FFFFF */
239 u64 b_ext_ate_ram[0x10000];
240
241 /* Reserved 0x100000-0x1FFFFF */
242 char _pad_100000[0x200000-0x100000];
243
244 /* PCI/GIO Device Spaces 0x200000-0xBFFFFF */
245 union { /* make all access sizes available. */
246 u8 c[0x100000 / 1];
247 u16 s[0x100000 / 2];
248 u32 l[0x100000 / 4];
249 u64 d[0x100000 / 8];
250 } b_devio_raw[10]; /* 0x200000 */
251
252 /* b_devio macro is a bit strange; it reflects the
253 * fact that the Bridge ASIC provides 2M for the
254 * first two DevIO windows and 1M for the other six.
255 */
256 #define b_devio(n) b_devio_raw[((n)<2)?(n*2):(n+2)]
257
258 /* External Flash Proms 1,0 0xC00000-0xFFFFFF */
259 union { /* make all access sizes available. */
260 u8 c[0x400000 / 1]; /* read-only */
261 u16 s[0x400000 / 2]; /* read-write */
262 u32 l[0x400000 / 4]; /* read-only */
263 u64 d[0x400000 / 8]; /* read-only */
264 } b_external_flash; /* 0xC00000 */
265 };
266
267 /*
268 * Field formats for Error Command Word and Auxiliary Error Command Word
269 * of bridge.
270 */
271 struct bridge_err_cmdword {
272 union {
273 u32 cmd_word;
274 struct {
275 u32 didn:4, /* Destination ID */
276 sidn:4, /* Source ID */
277 pactyp:4, /* Packet type */
278 tnum:5, /* Trans Number */
279 coh:1, /* Coh Transaction */
280 ds:2, /* Data size */
281 gbr:1, /* GBR enable */
282 vbpm:1, /* VBPM message */
283 error:1, /* Error occurred */
284 barr:1, /* Barrier op */
285 rsvd:8;
286 } berr_st;
287 } berr_un;
288 };
289
290 #define berr_field berr_un.berr_st
291 #endif /* !__ASSEMBLY__ */
292
293 /*
294 * The values of these macros can and should be crosschecked
295 * regularly against the offsets of the like-named fields
296 * within the bridge_regs structure above.
297 */
298
299 /* Byte offset macros for Bridge internal registers */
300
301 #define BRIDGE_WID_ID WIDGET_ID
302 #define BRIDGE_WID_STAT WIDGET_STATUS
303 #define BRIDGE_WID_ERR_UPPER WIDGET_ERR_UPPER_ADDR
304 #define BRIDGE_WID_ERR_LOWER WIDGET_ERR_LOWER_ADDR
305 #define BRIDGE_WID_CONTROL WIDGET_CONTROL
306 #define BRIDGE_WID_REQ_TIMEOUT WIDGET_REQ_TIMEOUT
307 #define BRIDGE_WID_INT_UPPER WIDGET_INTDEST_UPPER_ADDR
308 #define BRIDGE_WID_INT_LOWER WIDGET_INTDEST_LOWER_ADDR
309 #define BRIDGE_WID_ERR_CMDWORD WIDGET_ERR_CMD_WORD
310 #define BRIDGE_WID_LLP WIDGET_LLP_CFG
311 #define BRIDGE_WID_TFLUSH WIDGET_TFLUSH
312
313 #define BRIDGE_WID_AUX_ERR 0x00005C /* Aux Error Command Word */
314 #define BRIDGE_WID_RESP_UPPER 0x000064 /* Response Buf Upper Addr */
315 #define BRIDGE_WID_RESP_LOWER 0x00006C /* Response Buf Lower Addr */
316 #define BRIDGE_WID_TST_PIN_CTRL 0x000074 /* Test pin control */
317
318 #define BRIDGE_DIR_MAP 0x000084 /* Direct Map reg */
319
320 #define BRIDGE_RAM_PERR 0x000094 /* SSRAM Parity Error */
321
322 #define BRIDGE_ARB 0x0000A4 /* Arbitration Priority reg */
323
324 #define BRIDGE_NIC 0x0000B4 /* Number In A Can */
325
326 #define BRIDGE_BUS_TIMEOUT 0x0000C4 /* Bus Timeout Register */
327 #define BRIDGE_PCI_BUS_TIMEOUT BRIDGE_BUS_TIMEOUT
328 #define BRIDGE_PCI_CFG 0x0000CC /* PCI Type 1 Config reg */
329 #define BRIDGE_PCI_ERR_UPPER 0x0000D4 /* PCI error Upper Addr */
330 #define BRIDGE_PCI_ERR_LOWER 0x0000DC /* PCI error Lower Addr */
331
332 #define BRIDGE_INT_STATUS 0x000104 /* Interrupt Status */
333 #define BRIDGE_INT_ENABLE 0x00010C /* Interrupt Enables */
334 #define BRIDGE_INT_RST_STAT 0x000114 /* Reset Intr Status */
335 #define BRIDGE_INT_MODE 0x00011C /* Interrupt Mode */
336 #define BRIDGE_INT_DEVICE 0x000124 /* Interrupt Device */
337 #define BRIDGE_INT_HOST_ERR 0x00012C /* Host Error Field */
338
339 #define BRIDGE_INT_ADDR0 0x000134 /* Host Address Reg */
340 #define BRIDGE_INT_ADDR_OFF 0x000008 /* Host Addr offset (1..7) */
341 #define BRIDGE_INT_ADDR(x) (BRIDGE_INT_ADDR0+(x)*BRIDGE_INT_ADDR_OFF)
342
343 #define BRIDGE_DEVICE0 0x000204 /* Device 0 */
344 #define BRIDGE_DEVICE_OFF 0x000008 /* Device offset (1..7) */
345 #define BRIDGE_DEVICE(x) (BRIDGE_DEVICE0+(x)*BRIDGE_DEVICE_OFF)
346
347 #define BRIDGE_WR_REQ_BUF0 0x000244 /* Write Request Buffer 0 */
348 #define BRIDGE_WR_REQ_BUF_OFF 0x000008 /* Buffer Offset (1..7) */
349 #define BRIDGE_WR_REQ_BUF(x) (BRIDGE_WR_REQ_BUF0+(x)*BRIDGE_WR_REQ_BUF_OFF)
350
351 #define BRIDGE_EVEN_RESP 0x000284 /* Even Device Response Buf */
352 #define BRIDGE_ODD_RESP 0x00028C /* Odd Device Response Buf */
353
354 #define BRIDGE_RESP_STATUS 0x000294 /* Read Response Status reg */
355 #define BRIDGE_RESP_CLEAR 0x00029C /* Read Response Clear reg */
356
357 /* Byte offset macros for Bridge I/O space */
358
359 #define BRIDGE_ATE_RAM 0x00010000 /* Internal Addr Xlat Ram */
360
361 #define BRIDGE_TYPE0_CFG_DEV0 0x00020000 /* Type 0 Cfg, Device 0 */
362 #define BRIDGE_TYPE0_CFG_SLOT_OFF 0x00001000 /* Type 0 Cfg Slot Offset (1..7) */
363 #define BRIDGE_TYPE0_CFG_FUNC_OFF 0x00000100 /* Type 0 Cfg Func Offset (1..7) */
364 #define BRIDGE_TYPE0_CFG_DEV(s) (BRIDGE_TYPE0_CFG_DEV0+\
365 (s)*BRIDGE_TYPE0_CFG_SLOT_OFF)
366 #define BRIDGE_TYPE0_CFG_DEVF(s, f) (BRIDGE_TYPE0_CFG_DEV0+\
367 (s)*BRIDGE_TYPE0_CFG_SLOT_OFF+\
368 (f)*BRIDGE_TYPE0_CFG_FUNC_OFF)
369
370 #define BRIDGE_TYPE1_CFG 0x00028000 /* Type 1 Cfg space */
371
372 #define BRIDGE_PCI_IACK 0x00030000 /* PCI Interrupt Ack */
373 #define BRIDGE_EXT_SSRAM 0x00080000 /* Extern SSRAM (ATE) */
374
375 /* Byte offset macros for Bridge device IO spaces */
376
377 #define BRIDGE_DEV_CNT 8 /* Up to 8 devices per bridge */
378 #define BRIDGE_DEVIO0 0x00200000 /* Device IO 0 Addr */
379 #define BRIDGE_DEVIO1 0x00400000 /* Device IO 1 Addr */
380 #define BRIDGE_DEVIO2 0x00600000 /* Device IO 2 Addr */
381 #define BRIDGE_DEVIO_OFF 0x00100000 /* Device IO Offset (3..7) */
382
383 #define BRIDGE_DEVIO_2MB 0x00200000 /* Device IO Offset (0..1) */
384 #define BRIDGE_DEVIO_1MB 0x00100000 /* Device IO Offset (2..7) */
385
386 #define BRIDGE_DEVIO(x) ((x)<=1 ? BRIDGE_DEVIO0+(x)*BRIDGE_DEVIO_2MB : BRIDGE_DEVIO2+((x)-2)*BRIDGE_DEVIO_1MB)
387
388 #define BRIDGE_EXTERNAL_FLASH 0x00C00000 /* External Flash PROMS */
389
390 /* ========================================================================
391 * Bridge register bit field definitions
392 */
393
394 /* Widget part number of bridge */
395 #define BRIDGE_WIDGET_PART_NUM 0xc002
396 #define XBRIDGE_WIDGET_PART_NUM 0xd002
397
398 /* Manufacturer of bridge */
399 #define BRIDGE_WIDGET_MFGR_NUM 0x036
400 #define XBRIDGE_WIDGET_MFGR_NUM 0x024
401
402 /* Revision numbers for known Bridge revisions */
403 #define BRIDGE_REV_A 0x1
404 #define BRIDGE_REV_B 0x2
405 #define BRIDGE_REV_C 0x3
406 #define BRIDGE_REV_D 0x4
407
408 /* Bridge widget status register bits definition */
409
410 #define BRIDGE_STAT_LLP_REC_CNT (0xFFu << 24)
411 #define BRIDGE_STAT_LLP_TX_CNT (0xFF << 16)
412 #define BRIDGE_STAT_FLASH_SELECT (0x1 << 6)
413 #define BRIDGE_STAT_PCI_GIO_N (0x1 << 5)
414 #define BRIDGE_STAT_PENDING (0x1F << 0)
415
416 /* Bridge widget control register bits definition */
417 #define BRIDGE_CTRL_FLASH_WR_EN (0x1ul << 31)
418 #define BRIDGE_CTRL_EN_CLK50 (0x1 << 30)
419 #define BRIDGE_CTRL_EN_CLK40 (0x1 << 29)
420 #define BRIDGE_CTRL_EN_CLK33 (0x1 << 28)
421 #define BRIDGE_CTRL_RST(n) ((n) << 24)
422 #define BRIDGE_CTRL_RST_MASK (BRIDGE_CTRL_RST(0xF))
423 #define BRIDGE_CTRL_RST_PIN(x) (BRIDGE_CTRL_RST(0x1 << (x)))
424 #define BRIDGE_CTRL_IO_SWAP (0x1 << 23)
425 #define BRIDGE_CTRL_MEM_SWAP (0x1 << 22)
426 #define BRIDGE_CTRL_PAGE_SIZE (0x1 << 21)
427 #define BRIDGE_CTRL_SS_PAR_BAD (0x1 << 20)
428 #define BRIDGE_CTRL_SS_PAR_EN (0x1 << 19)
429 #define BRIDGE_CTRL_SSRAM_SIZE(n) ((n) << 17)
430 #define BRIDGE_CTRL_SSRAM_SIZE_MASK (BRIDGE_CTRL_SSRAM_SIZE(0x3))
431 #define BRIDGE_CTRL_SSRAM_512K (BRIDGE_CTRL_SSRAM_SIZE(0x3))
432 #define BRIDGE_CTRL_SSRAM_128K (BRIDGE_CTRL_SSRAM_SIZE(0x2))
433 #define BRIDGE_CTRL_SSRAM_64K (BRIDGE_CTRL_SSRAM_SIZE(0x1))
434 #define BRIDGE_CTRL_SSRAM_1K (BRIDGE_CTRL_SSRAM_SIZE(0x0))
435 #define BRIDGE_CTRL_F_BAD_PKT (0x1 << 16)
436 #define BRIDGE_CTRL_LLP_XBAR_CRD(n) ((n) << 12)
437 #define BRIDGE_CTRL_LLP_XBAR_CRD_MASK (BRIDGE_CTRL_LLP_XBAR_CRD(0xf))
438 #define BRIDGE_CTRL_CLR_RLLP_CNT (0x1 << 11)
439 #define BRIDGE_CTRL_CLR_TLLP_CNT (0x1 << 10)
440 #define BRIDGE_CTRL_SYS_END (0x1 << 9)
441 #define BRIDGE_CTRL_MAX_TRANS(n) ((n) << 4)
442 #define BRIDGE_CTRL_MAX_TRANS_MASK (BRIDGE_CTRL_MAX_TRANS(0x1f))
443 #define BRIDGE_CTRL_WIDGET_ID(n) ((n) << 0)
444 #define BRIDGE_CTRL_WIDGET_ID_MASK (BRIDGE_CTRL_WIDGET_ID(0xf))
445
446 /* Bridge Response buffer Error Upper Register bit fields definition */
447 #define BRIDGE_RESP_ERRUPPR_DEVNUM_SHFT (20)
448 #define BRIDGE_RESP_ERRUPPR_DEVNUM_MASK (0x7 << BRIDGE_RESP_ERRUPPR_DEVNUM_SHFT)
449 #define BRIDGE_RESP_ERRUPPR_BUFNUM_SHFT (16)
450 #define BRIDGE_RESP_ERRUPPR_BUFNUM_MASK (0xF << BRIDGE_RESP_ERRUPPR_BUFNUM_SHFT)
451 #define BRIDGE_RESP_ERRRUPPR_BUFMASK (0xFFFF)
452
453 #define BRIDGE_RESP_ERRUPPR_BUFNUM(x) \
454 (((x) & BRIDGE_RESP_ERRUPPR_BUFNUM_MASK) >> \
455 BRIDGE_RESP_ERRUPPR_BUFNUM_SHFT)
456
457 #define BRIDGE_RESP_ERRUPPR_DEVICE(x) \
458 (((x) & BRIDGE_RESP_ERRUPPR_DEVNUM_MASK) >> \
459 BRIDGE_RESP_ERRUPPR_DEVNUM_SHFT)
460
461 /* Bridge direct mapping register bits definition */
462 #define BRIDGE_DIRMAP_W_ID_SHFT 20
463 #define BRIDGE_DIRMAP_W_ID (0xf << BRIDGE_DIRMAP_W_ID_SHFT)
464 #define BRIDGE_DIRMAP_RMF_64 (0x1 << 18)
465 #define BRIDGE_DIRMAP_ADD512 (0x1 << 17)
466 #define BRIDGE_DIRMAP_OFF (0x1ffff << 0)
467 #define BRIDGE_DIRMAP_OFF_ADDRSHFT (31) /* lsbit of DIRMAP_OFF is xtalk address bit 31 */
468
469 /* Bridge Arbitration register bits definition */
470 #define BRIDGE_ARB_REQ_WAIT_TICK(x) ((x) << 16)
471 #define BRIDGE_ARB_REQ_WAIT_TICK_MASK BRIDGE_ARB_REQ_WAIT_TICK(0x3)
472 #define BRIDGE_ARB_REQ_WAIT_EN(x) ((x) << 8)
473 #define BRIDGE_ARB_REQ_WAIT_EN_MASK BRIDGE_ARB_REQ_WAIT_EN(0xff)
474 #define BRIDGE_ARB_FREEZE_GNT (1 << 6)
475 #define BRIDGE_ARB_HPRI_RING_B2 (1 << 5)
476 #define BRIDGE_ARB_HPRI_RING_B1 (1 << 4)
477 #define BRIDGE_ARB_HPRI_RING_B0 (1 << 3)
478 #define BRIDGE_ARB_LPRI_RING_B2 (1 << 2)
479 #define BRIDGE_ARB_LPRI_RING_B1 (1 << 1)
480 #define BRIDGE_ARB_LPRI_RING_B0 (1 << 0)
481
482 /* Bridge Bus time-out register bits definition */
483 #define BRIDGE_BUS_PCI_RETRY_HLD(x) ((x) << 16)
484 #define BRIDGE_BUS_PCI_RETRY_HLD_MASK BRIDGE_BUS_PCI_RETRY_HLD(0x1f)
485 #define BRIDGE_BUS_GIO_TIMEOUT (1 << 12)
486 #define BRIDGE_BUS_PCI_RETRY_CNT(x) ((x) << 0)
487 #define BRIDGE_BUS_PCI_RETRY_MASK BRIDGE_BUS_PCI_RETRY_CNT(0x3ff)
488
489 /* Bridge interrupt status register bits definition */
490 #define BRIDGE_ISR_MULTI_ERR (0x1u << 31)
491 #define BRIDGE_ISR_PMU_ESIZE_FAULT (0x1 << 30)
492 #define BRIDGE_ISR_UNEXP_RESP (0x1 << 29)
493 #define BRIDGE_ISR_BAD_XRESP_PKT (0x1 << 28)
494 #define BRIDGE_ISR_BAD_XREQ_PKT (0x1 << 27)
495 #define BRIDGE_ISR_RESP_XTLK_ERR (0x1 << 26)
496 #define BRIDGE_ISR_REQ_XTLK_ERR (0x1 << 25)
497 #define BRIDGE_ISR_INVLD_ADDR (0x1 << 24)
498 #define BRIDGE_ISR_UNSUPPORTED_XOP (0x1 << 23)
499 #define BRIDGE_ISR_XREQ_FIFO_OFLOW (0x1 << 22)
500 #define BRIDGE_ISR_LLP_REC_SNERR (0x1 << 21)
501 #define BRIDGE_ISR_LLP_REC_CBERR (0x1 << 20)
502 #define BRIDGE_ISR_LLP_RCTY (0x1 << 19)
503 #define BRIDGE_ISR_LLP_TX_RETRY (0x1 << 18)
504 #define BRIDGE_ISR_LLP_TCTY (0x1 << 17)
505 #define BRIDGE_ISR_SSRAM_PERR (0x1 << 16)
506 #define BRIDGE_ISR_PCI_ABORT (0x1 << 15)
507 #define BRIDGE_ISR_PCI_PARITY (0x1 << 14)
508 #define BRIDGE_ISR_PCI_SERR (0x1 << 13)
509 #define BRIDGE_ISR_PCI_PERR (0x1 << 12)
510 #define BRIDGE_ISR_PCI_MST_TIMEOUT (0x1 << 11)
511 #define BRIDGE_ISR_GIO_MST_TIMEOUT BRIDGE_ISR_PCI_MST_TIMEOUT
512 #define BRIDGE_ISR_PCI_RETRY_CNT (0x1 << 10)
513 #define BRIDGE_ISR_XREAD_REQ_TIMEOUT (0x1 << 9)
514 #define BRIDGE_ISR_GIO_B_ENBL_ERR (0x1 << 8)
515 #define BRIDGE_ISR_INT_MSK (0xff << 0)
516 #define BRIDGE_ISR_INT(x) (0x1 << (x))
517
518 #define BRIDGE_ISR_LINK_ERROR \
519 (BRIDGE_ISR_LLP_REC_SNERR|BRIDGE_ISR_LLP_REC_CBERR| \
520 BRIDGE_ISR_LLP_RCTY|BRIDGE_ISR_LLP_TX_RETRY| \
521 BRIDGE_ISR_LLP_TCTY)
522
523 #define BRIDGE_ISR_PCIBUS_PIOERR \
524 (BRIDGE_ISR_PCI_MST_TIMEOUT|BRIDGE_ISR_PCI_ABORT)
525
526 #define BRIDGE_ISR_PCIBUS_ERROR \
527 (BRIDGE_ISR_PCIBUS_PIOERR|BRIDGE_ISR_PCI_PERR| \
528 BRIDGE_ISR_PCI_SERR|BRIDGE_ISR_PCI_RETRY_CNT| \
529 BRIDGE_ISR_PCI_PARITY)
530
531 #define BRIDGE_ISR_XTALK_ERROR \
532 (BRIDGE_ISR_XREAD_REQ_TIMEOUT|BRIDGE_ISR_XREQ_FIFO_OFLOW|\
533 BRIDGE_ISR_UNSUPPORTED_XOP|BRIDGE_ISR_INVLD_ADDR| \
534 BRIDGE_ISR_REQ_XTLK_ERR|BRIDGE_ISR_RESP_XTLK_ERR| \
535 BRIDGE_ISR_BAD_XREQ_PKT|BRIDGE_ISR_BAD_XRESP_PKT| \
536 BRIDGE_ISR_UNEXP_RESP)
537
538 #define BRIDGE_ISR_ERRORS \
539 (BRIDGE_ISR_LINK_ERROR|BRIDGE_ISR_PCIBUS_ERROR| \
540 BRIDGE_ISR_XTALK_ERROR|BRIDGE_ISR_SSRAM_PERR| \
541 BRIDGE_ISR_PMU_ESIZE_FAULT)
542
543 /*
544 * List of Errors which are fatal and kill the system
545 */
546 #define BRIDGE_ISR_ERROR_FATAL \
547 ((BRIDGE_ISR_XTALK_ERROR & ~BRIDGE_ISR_XREAD_REQ_TIMEOUT)|\
548 BRIDGE_ISR_PCI_SERR|BRIDGE_ISR_PCI_PARITY )
549
550 #define BRIDGE_ISR_ERROR_DUMP \
551 (BRIDGE_ISR_PCIBUS_ERROR|BRIDGE_ISR_PMU_ESIZE_FAULT| \
552 BRIDGE_ISR_XTALK_ERROR|BRIDGE_ISR_SSRAM_PERR)
553
554 /* Bridge interrupt enable register bits definition */
555 #define BRIDGE_IMR_UNEXP_RESP BRIDGE_ISR_UNEXP_RESP
556 #define BRIDGE_IMR_PMU_ESIZE_FAULT BRIDGE_ISR_PMU_ESIZE_FAULT
557 #define BRIDGE_IMR_BAD_XRESP_PKT BRIDGE_ISR_BAD_XRESP_PKT
558 #define BRIDGE_IMR_BAD_XREQ_PKT BRIDGE_ISR_BAD_XREQ_PKT
559 #define BRIDGE_IMR_RESP_XTLK_ERR BRIDGE_ISR_RESP_XTLK_ERR
560 #define BRIDGE_IMR_REQ_XTLK_ERR BRIDGE_ISR_REQ_XTLK_ERR
561 #define BRIDGE_IMR_INVLD_ADDR BRIDGE_ISR_INVLD_ADDR
562 #define BRIDGE_IMR_UNSUPPORTED_XOP BRIDGE_ISR_UNSUPPORTED_XOP
563 #define BRIDGE_IMR_XREQ_FIFO_OFLOW BRIDGE_ISR_XREQ_FIFO_OFLOW
564 #define BRIDGE_IMR_LLP_REC_SNERR BRIDGE_ISR_LLP_REC_SNERR
565 #define BRIDGE_IMR_LLP_REC_CBERR BRIDGE_ISR_LLP_REC_CBERR
566 #define BRIDGE_IMR_LLP_RCTY BRIDGE_ISR_LLP_RCTY
567 #define BRIDGE_IMR_LLP_TX_RETRY BRIDGE_ISR_LLP_TX_RETRY
568 #define BRIDGE_IMR_LLP_TCTY BRIDGE_ISR_LLP_TCTY
569 #define BRIDGE_IMR_SSRAM_PERR BRIDGE_ISR_SSRAM_PERR
570 #define BRIDGE_IMR_PCI_ABORT BRIDGE_ISR_PCI_ABORT
571 #define BRIDGE_IMR_PCI_PARITY BRIDGE_ISR_PCI_PARITY
572 #define BRIDGE_IMR_PCI_SERR BRIDGE_ISR_PCI_SERR
573 #define BRIDGE_IMR_PCI_PERR BRIDGE_ISR_PCI_PERR
574 #define BRIDGE_IMR_PCI_MST_TIMEOUT BRIDGE_ISR_PCI_MST_TIMEOUT
575 #define BRIDGE_IMR_GIO_MST_TIMEOUT BRIDGE_ISR_GIO_MST_TIMEOUT
576 #define BRIDGE_IMR_PCI_RETRY_CNT BRIDGE_ISR_PCI_RETRY_CNT
577 #define BRIDGE_IMR_XREAD_REQ_TIMEOUT BRIDGE_ISR_XREAD_REQ_TIMEOUT
578 #define BRIDGE_IMR_GIO_B_ENBL_ERR BRIDGE_ISR_GIO_B_ENBL_ERR
579 #define BRIDGE_IMR_INT_MSK BRIDGE_ISR_INT_MSK
580 #define BRIDGE_IMR_INT(x) BRIDGE_ISR_INT(x)
581
582 /* Bridge interrupt reset register bits definition */
583 #define BRIDGE_IRR_MULTI_CLR (0x1 << 6)
584 #define BRIDGE_IRR_CRP_GRP_CLR (0x1 << 5)
585 #define BRIDGE_IRR_RESP_BUF_GRP_CLR (0x1 << 4)
586 #define BRIDGE_IRR_REQ_DSP_GRP_CLR (0x1 << 3)
587 #define BRIDGE_IRR_LLP_GRP_CLR (0x1 << 2)
588 #define BRIDGE_IRR_SSRAM_GRP_CLR (0x1 << 1)
589 #define BRIDGE_IRR_PCI_GRP_CLR (0x1 << 0)
590 #define BRIDGE_IRR_GIO_GRP_CLR (0x1 << 0)
591 #define BRIDGE_IRR_ALL_CLR 0x7f
592
593 #define BRIDGE_IRR_CRP_GRP (BRIDGE_ISR_UNEXP_RESP | \
594 BRIDGE_ISR_XREQ_FIFO_OFLOW)
595 #define BRIDGE_IRR_RESP_BUF_GRP (BRIDGE_ISR_BAD_XRESP_PKT | \
596 BRIDGE_ISR_RESP_XTLK_ERR | \
597 BRIDGE_ISR_XREAD_REQ_TIMEOUT)
598 #define BRIDGE_IRR_REQ_DSP_GRP (BRIDGE_ISR_UNSUPPORTED_XOP | \
599 BRIDGE_ISR_BAD_XREQ_PKT | \
600 BRIDGE_ISR_REQ_XTLK_ERR | \
601 BRIDGE_ISR_INVLD_ADDR)
602 #define BRIDGE_IRR_LLP_GRP (BRIDGE_ISR_LLP_REC_SNERR | \
603 BRIDGE_ISR_LLP_REC_CBERR | \
604 BRIDGE_ISR_LLP_RCTY | \
605 BRIDGE_ISR_LLP_TX_RETRY | \
606 BRIDGE_ISR_LLP_TCTY)
607 #define BRIDGE_IRR_SSRAM_GRP (BRIDGE_ISR_SSRAM_PERR | \
608 BRIDGE_ISR_PMU_ESIZE_FAULT)
609 #define BRIDGE_IRR_PCI_GRP (BRIDGE_ISR_PCI_ABORT | \
610 BRIDGE_ISR_PCI_PARITY | \
611 BRIDGE_ISR_PCI_SERR | \
612 BRIDGE_ISR_PCI_PERR | \
613 BRIDGE_ISR_PCI_MST_TIMEOUT | \
614 BRIDGE_ISR_PCI_RETRY_CNT)
615
616 #define BRIDGE_IRR_GIO_GRP (BRIDGE_ISR_GIO_B_ENBL_ERR | \
617 BRIDGE_ISR_GIO_MST_TIMEOUT)
618
619 /* Bridge INT_DEV register bits definition */
620 #define BRIDGE_INT_DEV_SHFT(n) ((n)*3)
621 #define BRIDGE_INT_DEV_MASK(n) (0x7 << BRIDGE_INT_DEV_SHFT(n))
622 #define BRIDGE_INT_DEV_SET(_dev, _line) (_dev << BRIDGE_INT_DEV_SHFT(_line))
623
624 /* Bridge interrupt(x) register bits definition */
625 #define BRIDGE_INT_ADDR_HOST 0x0003FF00
626 #define BRIDGE_INT_ADDR_FLD 0x000000FF
627
628 #define BRIDGE_TMO_PCI_RETRY_HLD_MASK 0x1f0000
629 #define BRIDGE_TMO_GIO_TIMEOUT_MASK 0x001000
630 #define BRIDGE_TMO_PCI_RETRY_CNT_MASK 0x0003ff
631
632 #define BRIDGE_TMO_PCI_RETRY_CNT_MAX 0x3ff
633
634 /*
635 * The NASID should be shifted by this amount and stored into the
636 * interrupt(x) register.
637 */
638 #define BRIDGE_INT_ADDR_NASID_SHFT 8
639
640 /*
641 * The BRIDGE_INT_ADDR_DEST_IO bit should be set to send an interrupt to
642 * memory.
643 */
644 #define BRIDGE_INT_ADDR_DEST_IO (1 << 17)
645 #define BRIDGE_INT_ADDR_DEST_MEM 0
646 #define BRIDGE_INT_ADDR_MASK (1 << 17)
647
648 /* Bridge device(x) register bits definition */
649 #define BRIDGE_DEV_ERR_LOCK_EN 0x10000000
650 #define BRIDGE_DEV_PAGE_CHK_DIS 0x08000000
651 #define BRIDGE_DEV_FORCE_PCI_PAR 0x04000000
652 #define BRIDGE_DEV_VIRTUAL_EN 0x02000000
653 #define BRIDGE_DEV_PMU_WRGA_EN 0x01000000
654 #define BRIDGE_DEV_DIR_WRGA_EN 0x00800000
655 #define BRIDGE_DEV_DEV_SIZE 0x00400000
656 #define BRIDGE_DEV_RT 0x00200000
657 #define BRIDGE_DEV_SWAP_PMU 0x00100000
658 #define BRIDGE_DEV_SWAP_DIR 0x00080000
659 #define BRIDGE_DEV_PREF 0x00040000
660 #define BRIDGE_DEV_PRECISE 0x00020000
661 #define BRIDGE_DEV_COH 0x00010000
662 #define BRIDGE_DEV_BARRIER 0x00008000
663 #define BRIDGE_DEV_GBR 0x00004000
664 #define BRIDGE_DEV_DEV_SWAP 0x00002000
665 #define BRIDGE_DEV_DEV_IO_MEM 0x00001000
666 #define BRIDGE_DEV_OFF_MASK 0x00000fff
667 #define BRIDGE_DEV_OFF_ADDR_SHFT 20
668
669 #define BRIDGE_DEV_PMU_BITS (BRIDGE_DEV_PMU_WRGA_EN | \
670 BRIDGE_DEV_SWAP_PMU)
671 #define BRIDGE_DEV_D32_BITS (BRIDGE_DEV_DIR_WRGA_EN | \
672 BRIDGE_DEV_SWAP_DIR | \
673 BRIDGE_DEV_PREF | \
674 BRIDGE_DEV_PRECISE | \
675 BRIDGE_DEV_COH | \
676 BRIDGE_DEV_BARRIER)
677 #define BRIDGE_DEV_D64_BITS (BRIDGE_DEV_DIR_WRGA_EN | \
678 BRIDGE_DEV_SWAP_DIR | \
679 BRIDGE_DEV_COH | \
680 BRIDGE_DEV_BARRIER)
681
682 /* Bridge Error Upper register bit field definition */
683 #define BRIDGE_ERRUPPR_DEVMASTER (0x1 << 20) /* Device was master */
684 #define BRIDGE_ERRUPPR_PCIVDEV (0x1 << 19) /* Virtual Req value */
685 #define BRIDGE_ERRUPPR_DEVNUM_SHFT (16)
686 #define BRIDGE_ERRUPPR_DEVNUM_MASK (0x7 << BRIDGE_ERRUPPR_DEVNUM_SHFT)
687 #define BRIDGE_ERRUPPR_DEVICE(err) (((err) >> BRIDGE_ERRUPPR_DEVNUM_SHFT) & 0x7)
688 #define BRIDGE_ERRUPPR_ADDRMASK (0xFFFF)
689
690 /* Bridge interrupt mode register bits definition */
691 #define BRIDGE_INTMODE_CLR_PKT_EN(x) (0x1 << (x))
692
693 /* this should be written to the xbow's link_control(x) register */
694 #define BRIDGE_CREDIT 3
695
696 /* RRB assignment register */
697 #define BRIDGE_RRB_EN 0x8 /* after shifting down */
698 #define BRIDGE_RRB_DEV 0x7 /* after shifting down */
699 #define BRIDGE_RRB_VDEV 0x4 /* after shifting down */
700 #define BRIDGE_RRB_PDEV 0x3 /* after shifting down */
701
702 /* RRB status register */
703 #define BRIDGE_RRB_VALID(r) (0x00010000<<(r))
704 #define BRIDGE_RRB_INUSE(r) (0x00000001<<(r))
705
706 /* RRB clear register */
707 #define BRIDGE_RRB_CLEAR(r) (0x00000001<<(r))
708
709 /* xbox system controller declarations */
710 #define XBOX_BRIDGE_WID 8
711 #define FLASH_PROM1_BASE 0xE00000 /* To read the xbox sysctlr status */
712 #define XBOX_RPS_EXISTS 1 << 6 /* RPS bit in status register */
713 #define XBOX_RPS_FAIL 1 << 4 /* RPS status bit in register */
714
715 /* ========================================================================
716 */
717 /*
718 * Macros for Xtalk to Bridge bus (PCI/GIO) PIO
719 * refer to section 4.2.1 of Bridge Spec for xtalk to PCI/GIO PIO mappings
720 */
721 /* XTALK addresses that map into Bridge Bus addr space */
722 #define BRIDGE_PIO32_XTALK_ALIAS_BASE 0x000040000000L
723 #define BRIDGE_PIO32_XTALK_ALIAS_LIMIT 0x00007FFFFFFFL
724 #define BRIDGE_PIO64_XTALK_ALIAS_BASE 0x000080000000L
725 #define BRIDGE_PIO64_XTALK_ALIAS_LIMIT 0x0000BFFFFFFFL
726 #define BRIDGE_PCIIO_XTALK_ALIAS_BASE 0x000100000000L
727 #define BRIDGE_PCIIO_XTALK_ALIAS_LIMIT 0x0001FFFFFFFFL
728
729 /* Ranges of PCI bus space that can be accessed via PIO from xtalk */
730 #define BRIDGE_MIN_PIO_ADDR_MEM 0x00000000 /* 1G PCI memory space */
731 #define BRIDGE_MAX_PIO_ADDR_MEM 0x3fffffff
732 #define BRIDGE_MIN_PIO_ADDR_IO 0x00000000 /* 4G PCI IO space */
733 #define BRIDGE_MAX_PIO_ADDR_IO 0xffffffff
734
735 /* XTALK addresses that map into PCI addresses */
736 #define BRIDGE_PCI_MEM32_BASE BRIDGE_PIO32_XTALK_ALIAS_BASE
737 #define BRIDGE_PCI_MEM32_LIMIT BRIDGE_PIO32_XTALK_ALIAS_LIMIT
738 #define BRIDGE_PCI_MEM64_BASE BRIDGE_PIO64_XTALK_ALIAS_BASE
739 #define BRIDGE_PCI_MEM64_LIMIT BRIDGE_PIO64_XTALK_ALIAS_LIMIT
740 #define BRIDGE_PCI_IO_BASE BRIDGE_PCIIO_XTALK_ALIAS_BASE
741 #define BRIDGE_PCI_IO_LIMIT BRIDGE_PCIIO_XTALK_ALIAS_LIMIT
742
743 /*
744 * Macros for Bridge bus (PCI/GIO) to Xtalk DMA
745 */
746 /* Bridge Bus DMA addresses */
747 #define BRIDGE_LOCAL_BASE 0
748 #define BRIDGE_DMA_MAPPED_BASE 0x40000000
749 #define BRIDGE_DMA_MAPPED_SIZE 0x40000000 /* 1G Bytes */
750 #define BRIDGE_DMA_DIRECT_BASE 0x80000000
751 #define BRIDGE_DMA_DIRECT_SIZE 0x80000000 /* 2G Bytes */
752
753 #define PCI32_LOCAL_BASE BRIDGE_LOCAL_BASE
754
755 /* PCI addresses of regions decoded by Bridge for DMA */
756 #define PCI32_MAPPED_BASE BRIDGE_DMA_MAPPED_BASE
757 #define PCI32_DIRECT_BASE BRIDGE_DMA_DIRECT_BASE
758
759 #define IS_PCI32_LOCAL(x) ((ulong_t)(x) < PCI32_MAPPED_BASE)
760 #define IS_PCI32_MAPPED(x) ((ulong_t)(x) < PCI32_DIRECT_BASE && \
761 (ulong_t)(x) >= PCI32_MAPPED_BASE)
762 #define IS_PCI32_DIRECT(x) ((ulong_t)(x) >= PCI32_MAPPED_BASE)
763 #define IS_PCI64(x) ((ulong_t)(x) >= PCI64_BASE)
764
765 /*
766 * The GIO address space.
767 */
768 /* Xtalk to GIO PIO */
769 #define BRIDGE_GIO_MEM32_BASE BRIDGE_PIO32_XTALK_ALIAS_BASE
770 #define BRIDGE_GIO_MEM32_LIMIT BRIDGE_PIO32_XTALK_ALIAS_LIMIT
771
772 #define GIO_LOCAL_BASE BRIDGE_LOCAL_BASE
773
774 /* GIO addresses of regions decoded by Bridge for DMA */
775 #define GIO_MAPPED_BASE BRIDGE_DMA_MAPPED_BASE
776 #define GIO_DIRECT_BASE BRIDGE_DMA_DIRECT_BASE
777
778 #define IS_GIO_LOCAL(x) ((ulong_t)(x) < GIO_MAPPED_BASE)
779 #define IS_GIO_MAPPED(x) ((ulong_t)(x) < GIO_DIRECT_BASE && \
780 (ulong_t)(x) >= GIO_MAPPED_BASE)
781 #define IS_GIO_DIRECT(x) ((ulong_t)(x) >= GIO_MAPPED_BASE)
782
783 /* PCI to xtalk mapping */
784
785 /* given a DIR_OFF value and a pci/gio 32 bits direct address, determine
786 * which xtalk address is accessed
787 */
788 #define BRIDGE_DIRECT_32_SEG_SIZE BRIDGE_DMA_DIRECT_SIZE
789 #define BRIDGE_DIRECT_32_TO_XTALK(dir_off,adr) \
790 ((dir_off) * BRIDGE_DIRECT_32_SEG_SIZE + \
791 ((adr) & (BRIDGE_DIRECT_32_SEG_SIZE - 1)) + PHYS_RAMBASE)
792
793 /* 64-bit address attribute masks */
794 #define PCI64_ATTR_TARG_MASK 0xf000000000000000
795 #define PCI64_ATTR_TARG_SHFT 60
796 #define PCI64_ATTR_PREF 0x0800000000000000
797 #define PCI64_ATTR_PREC 0x0400000000000000
798 #define PCI64_ATTR_VIRTUAL 0x0200000000000000
799 #define PCI64_ATTR_BAR 0x0100000000000000
800 #define PCI64_ATTR_RMF_MASK 0x00ff000000000000
801 #define PCI64_ATTR_RMF_SHFT 48
802
803 struct bridge_controller {
804 struct resource busn;
805 struct bridge_regs *base;
806 unsigned long baddr;
807 unsigned long intr_addr;
808 struct irq_domain *domain;
809 unsigned int pci_int[8][2];
810 unsigned int int_mapping[8][2];
811 u32 ioc3_sid[8];
812 nasid_t nasid;
813 };
814
815 #define BRIDGE_CONTROLLER(bus) \
816 ((struct bridge_controller *)((bus)->sysdata))
817
818 #define bridge_read(bc, reg) __raw_readl(&bc->base->reg)
819 #define bridge_write(bc, reg, val) __raw_writel(val, &bc->base->reg)
820 #define bridge_set(bc, reg, val) \
821 __raw_writel(__raw_readl(&bc->base->reg) | (val), &bc->base->reg)
822 #define bridge_clr(bc, reg, val) \
823 __raw_writel(__raw_readl(&bc->base->reg) & ~(val), &bc->base->reg)
824
825 #endif /* _ASM_PCI_BRIDGE_H */
826
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