Annotation of sys/arch/alpha/include/bus.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: bus.h,v 1.24 2006/05/12 20:48:19 brad Exp $ */
! 2: /* $NetBSD: bus.h,v 1.10 1996/12/02 22:19:32 cgd Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1996 Carnegie-Mellon University.
! 6: * All rights reserved.
! 7: *
! 8: * Author: Chris G. Demetriou
! 9: *
! 10: * Permission to use, copy, modify and distribute this software and
! 11: * its documentation is hereby granted, provided that both the copyright
! 12: * notice and this permission notice appear in all copies of the
! 13: * software, derivative works or modified versions, and any portions
! 14: * thereof, and that both notices appear in supporting documentation.
! 15: *
! 16: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
! 17: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
! 18: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
! 19: *
! 20: * Carnegie Mellon requests users of this software to return to
! 21: *
! 22: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
! 23: * School of Computer Science
! 24: * Carnegie Mellon University
! 25: * Pittsburgh PA 15213-3890
! 26: *
! 27: * any improvements or extensions that they make and grant Carnegie the
! 28: * rights to redistribute these changes.
! 29: */
! 30:
! 31: #ifndef _ALPHA_BUS_H_
! 32: #define _ALPHA_BUS_H_
! 33:
! 34: /*
! 35: * Addresses (in bus space).
! 36: */
! 37: typedef u_long bus_addr_t;
! 38: typedef u_long bus_size_t;
! 39:
! 40: /*
! 41: * Access methods for bus space.
! 42: */
! 43: typedef struct alpha_bus_space *bus_space_tag_t;
! 44: typedef u_long bus_space_handle_t;
! 45:
! 46: struct alpha_bus_space {
! 47: /* cookie */
! 48: void *abs_cookie;
! 49:
! 50: /* mapping/unmapping */
! 51: int (*abs_map)(void *, bus_addr_t, bus_size_t,
! 52: int, bus_space_handle_t *);
! 53: void (*abs_unmap)(void *, bus_space_handle_t,
! 54: bus_size_t);
! 55: int (*abs_subregion)(void *, bus_space_handle_t,
! 56: bus_size_t, bus_size_t, bus_space_handle_t *);
! 57:
! 58: /* allocation/deallocation */
! 59: int (*abs_alloc)(void *, bus_addr_t, bus_addr_t,
! 60: bus_size_t, bus_size_t, bus_size_t, int,
! 61: bus_addr_t *, bus_space_handle_t *);
! 62: void (*abs_free)(void *, bus_space_handle_t,
! 63: bus_size_t);
! 64:
! 65: /* barrier */
! 66: void (*abs_barrier)(void *, bus_space_handle_t,
! 67: bus_size_t, bus_size_t, int);
! 68:
! 69: /* read (single) */
! 70: u_int8_t (*abs_r_1)(void *, bus_space_handle_t,
! 71: bus_size_t);
! 72: u_int16_t (*abs_r_2)(void *, bus_space_handle_t,
! 73: bus_size_t);
! 74: u_int32_t (*abs_r_4)(void *, bus_space_handle_t,
! 75: bus_size_t);
! 76: u_int64_t (*abs_r_8)(void *, bus_space_handle_t,
! 77: bus_size_t);
! 78:
! 79: /* read multiple */
! 80: void (*abs_rm_1)(void *, bus_space_handle_t,
! 81: bus_size_t, u_int8_t *, bus_size_t);
! 82: void (*abs_rm_2)(void *, bus_space_handle_t,
! 83: bus_size_t, u_int16_t *, bus_size_t);
! 84: void (*abs_rm_4)(void *, bus_space_handle_t,
! 85: bus_size_t, u_int32_t *, bus_size_t);
! 86: void (*abs_rm_8)(void *, bus_space_handle_t,
! 87: bus_size_t, u_int64_t *, bus_size_t);
! 88:
! 89: /* read region */
! 90: void (*abs_rr_1)(void *, bus_space_handle_t,
! 91: bus_size_t, u_int8_t *, bus_size_t);
! 92: void (*abs_rr_2)(void *, bus_space_handle_t,
! 93: bus_size_t, u_int16_t *, bus_size_t);
! 94: void (*abs_rr_4)(void *, bus_space_handle_t,
! 95: bus_size_t, u_int32_t *, bus_size_t);
! 96: void (*abs_rr_8)(void *, bus_space_handle_t,
! 97: bus_size_t, u_int64_t *, bus_size_t);
! 98:
! 99: /* write (single) */
! 100: void (*abs_w_1)(void *, bus_space_handle_t,
! 101: bus_size_t, u_int8_t);
! 102: void (*abs_w_2)(void *, bus_space_handle_t,
! 103: bus_size_t, u_int16_t);
! 104: void (*abs_w_4)(void *, bus_space_handle_t,
! 105: bus_size_t, u_int32_t);
! 106: void (*abs_w_8)(void *, bus_space_handle_t,
! 107: bus_size_t, u_int64_t);
! 108:
! 109: /* write multiple */
! 110: void (*abs_wm_1)(void *, bus_space_handle_t,
! 111: bus_size_t, const u_int8_t *, bus_size_t);
! 112: void (*abs_wm_2)(void *, bus_space_handle_t,
! 113: bus_size_t, const u_int16_t *, bus_size_t);
! 114: void (*abs_wm_4)(void *, bus_space_handle_t,
! 115: bus_size_t, const u_int32_t *, bus_size_t);
! 116: void (*abs_wm_8)(void *, bus_space_handle_t,
! 117: bus_size_t, const u_int64_t *, bus_size_t);
! 118:
! 119: /* write region */
! 120: void (*abs_wr_1)(void *, bus_space_handle_t,
! 121: bus_size_t, const u_int8_t *, bus_size_t);
! 122: void (*abs_wr_2)(void *, bus_space_handle_t,
! 123: bus_size_t, const u_int16_t *, bus_size_t);
! 124: void (*abs_wr_4)(void *, bus_space_handle_t,
! 125: bus_size_t, const u_int32_t *, bus_size_t);
! 126: void (*abs_wr_8)(void *, bus_space_handle_t,
! 127: bus_size_t, const u_int64_t *, bus_size_t);
! 128:
! 129: /* set multiple */
! 130: void (*abs_sm_1)(void *, bus_space_handle_t,
! 131: bus_size_t, u_int8_t, bus_size_t);
! 132: void (*abs_sm_2)(void *, bus_space_handle_t,
! 133: bus_size_t, u_int16_t, bus_size_t);
! 134: void (*abs_sm_4)(void *, bus_space_handle_t,
! 135: bus_size_t, u_int32_t, bus_size_t);
! 136: void (*abs_sm_8)(void *, bus_space_handle_t,
! 137: bus_size_t, u_int64_t, bus_size_t);
! 138:
! 139: /* set region */
! 140: void (*abs_sr_1)(void *, bus_space_handle_t,
! 141: bus_size_t, u_int8_t, bus_size_t);
! 142: void (*abs_sr_2)(void *, bus_space_handle_t,
! 143: bus_size_t, u_int16_t, bus_size_t);
! 144: void (*abs_sr_4)(void *, bus_space_handle_t,
! 145: bus_size_t, u_int32_t, bus_size_t);
! 146: void (*abs_sr_8)(void *, bus_space_handle_t,
! 147: bus_size_t, u_int64_t, bus_size_t);
! 148:
! 149: /* copy */
! 150: void (*abs_c_1)(void *, bus_space_handle_t, bus_size_t,
! 151: bus_space_handle_t, bus_size_t, bus_size_t);
! 152: void (*abs_c_2)(void *, bus_space_handle_t, bus_size_t,
! 153: bus_space_handle_t, bus_size_t, bus_size_t);
! 154: void (*abs_c_4)(void *, bus_space_handle_t, bus_size_t,
! 155: bus_space_handle_t, bus_size_t, bus_size_t);
! 156: void (*abs_c_8)(void *, bus_space_handle_t, bus_size_t,
! 157: bus_space_handle_t, bus_size_t, bus_size_t);
! 158:
! 159: /* OpenBSD extensions follows */
! 160:
! 161: /* read multiple raw */
! 162: void (*abs_rrm_2)(void *, bus_space_handle_t,
! 163: bus_size_t, u_int8_t *, bus_size_t);
! 164: void (*abs_rrm_4)(void *, bus_space_handle_t,
! 165: bus_size_t, u_int8_t *, bus_size_t);
! 166: void (*abs_rrm_8)(void *, bus_space_handle_t,
! 167: bus_size_t, u_int8_t *, bus_size_t);
! 168:
! 169: /* write multiple raw */
! 170: void (*abs_wrm_2)(void *, bus_space_handle_t,
! 171: bus_size_t, const u_int8_t *, bus_size_t);
! 172: void (*abs_wrm_4)(void *, bus_space_handle_t,
! 173: bus_size_t, const u_int8_t *, bus_size_t);
! 174: void (*abs_wrm_8)(void *, bus_space_handle_t,
! 175: bus_size_t, const u_int8_t *, bus_size_t);
! 176: };
! 177:
! 178:
! 179: /*
! 180: * Utility macros; INTERNAL USE ONLY.
! 181: */
! 182: #define __abs_c(a,b) __CONCAT(a,b)
! 183: #define __abs_opname(op,size) __abs_c(__abs_c(__abs_c(abs_,op),_),size)
! 184:
! 185: #define __abs_rs(sz, t, h, o) \
! 186: (*(t)->__abs_opname(r,sz))((t)->abs_cookie, h, o)
! 187: #define __abs_ws(sz, t, h, o, v) \
! 188: (*(t)->__abs_opname(w,sz))((t)->abs_cookie, h, o, v)
! 189: #define __abs_nonsingle(type, sz, t, h, o, a, c) \
! 190: (*(t)->__abs_opname(type,sz))((t)->abs_cookie, h, o, a, c)
! 191: #ifndef DEBUG
! 192: #define __abs_aligned_nonsingle(type, sz, t, h, o, a, c) \
! 193: __abs_nonsingle(type, sz, (t), (h), (o), (a), (c))
! 194:
! 195: #else
! 196: #define __abs_aligned_nonsingle(type, sz, t, h, o, a, c) \
! 197: do { \
! 198: if (((unsigned long)a & (sz - 1)) != 0) \
! 199: panic("bus non-single %d-byte unaligned (to %p) at %s:%d", \
! 200: sz, a, __FILE__, __LINE__); \
! 201: (*(t)->__abs_opname(type,sz))((t)->abs_cookie, h, o, a, c); \
! 202: } while (0)
! 203: #endif
! 204: #define __abs_set(type, sz, t, h, o, v, c) \
! 205: (*(t)->__abs_opname(type,sz))((t)->abs_cookie, h, o, v, c)
! 206: #define __abs_copy(sz, t, h1, o1, h2, o2, cnt) \
! 207: (*(t)->__abs_opname(c,sz))((t)->abs_cookie, h1, o1, h2, o2, cnt)
! 208:
! 209: /*
! 210: * Mapping and unmapping operations.
! 211: */
! 212: #define bus_space_map(t, a, s, c, hp) \
! 213: (*(t)->abs_map)((t)->abs_cookie, (a), (s), (c), (hp))
! 214: #define alpha_bus_space_map_noacct bus_space_map
! 215: #define bus_space_unmap(t, h, s) \
! 216: (*(t)->abs_unmap)((t)->abs_cookie, (h), (s))
! 217: #define alpha_bus_space_unmap_noacct bus_space_unmap
! 218: #define bus_space_subregion(t, h, o, s, hp) \
! 219: (*(t)->abs_subregion)((t)->abs_cookie, (h), (o), (s), (hp))
! 220:
! 221:
! 222: /*
! 223: * Allocation and deallocation operations.
! 224: */
! 225: #define bus_space_alloc(t, rs, re, s, a, b, c, ap, hp) \
! 226: (*(t)->abs_alloc)((t)->abs_cookie, (rs), (re), (s), (a), (b), \
! 227: (c), (ap), (hp))
! 228: #define bus_space_free(t, h, s) \
! 229: (*(t)->abs_free)((t)->abs_cookie, (h), (s))
! 230:
! 231:
! 232: /*
! 233: * Bus barrier operations.
! 234: */
! 235: #define bus_space_barrier(t, h, o, l, f) \
! 236: (*(t)->abs_barrier)((t)->abs_cookie, (h), (o), (l), (f))
! 237:
! 238: #define BUS_BARRIER_READ 0x01
! 239: #define BUS_BARRIER_WRITE 0x02
! 240: #define BUS_SPACE_BARRIER_READ BUS_BARRIER_READ
! 241: #define BUS_SPACE_BARRIER_WRITE BUS_BARRIER_WRITE
! 242:
! 243:
! 244: /*
! 245: * Bus read (single) operations.
! 246: */
! 247: #define bus_space_read_1(t, h, o) __abs_rs(1,(t),(h),(o))
! 248: #define bus_space_read_2(t, h, o) __abs_rs(2,(t),(h),(o))
! 249: #define bus_space_read_4(t, h, o) __abs_rs(4,(t),(h),(o))
! 250: #define bus_space_read_8(t, h, o) __abs_rs(8,(t),(h),(o))
! 251:
! 252:
! 253: /*
! 254: * Bus read multiple operations.
! 255: */
! 256: #define bus_space_read_multi_1(t, h, o, a, c) \
! 257: __abs_nonsingle(rm,1,(t),(h),(o),(a),(c))
! 258: #define bus_space_read_multi_2(t, h, o, a, c) \
! 259: __abs_aligned_nonsingle(rm,2,(t),(h),(o),(a),(c))
! 260: #define bus_space_read_multi_4(t, h, o, a, c) \
! 261: __abs_aligned_nonsingle(rm,4,(t),(h),(o),(a),(c))
! 262: #define bus_space_read_multi_8(t, h, o, a, c) \
! 263: __abs_aligned_nonsingle(rm,8,(t),(h),(o),(a),(c))
! 264:
! 265:
! 266: /*
! 267: * void bus_space_read_raw_multi_N(bus_space_tag_t tag,
! 268: * bus_space_handle_t bsh, bus_size_t offset,
! 269: * u_int8_t *addr, size_t count);
! 270: *
! 271: * Read `count' bytes in 2, 4 or 8 byte wide quantities from bus space
! 272: * described by tag/handle/offset and copy into buffer provided. The buffer
! 273: * must have proper alignment for the N byte wide entities. Furthermore
! 274: * possible byte-swapping should be done by these functions.
! 275: */
! 276:
! 277: #define bus_space_read_raw_multi_2(t, h, o, a, c) \
! 278: __abs_nonsingle(rrm,2,(t),(h),(o),(a),(c))
! 279: #define bus_space_read_raw_multi_4(t, h, o, a, c) \
! 280: __abs_nonsingle(rrm,4,(t),(h),(o),(a),(c))
! 281: #define bus_space_read_raw_multi_8(t, h, o, a, c) \
! 282: __abs_nonsingle(rrm,8,(t),(h),(o),(a),(c))
! 283:
! 284: /*
! 285: * Bus read region operations.
! 286: */
! 287: #define bus_space_read_region_1(t, h, o, a, c) \
! 288: __abs_nonsingle(rr,1,(t),(h),(o),(a),(c))
! 289: #define bus_space_read_region_2(t, h, o, a, c) \
! 290: __abs_aligned_nonsingle(rr,2,(t),(h),(o),(a),(c))
! 291: #define bus_space_read_region_4(t, h, o, a, c) \
! 292: __abs_aligned_nonsingle(rr,4,(t),(h),(o),(a),(c))
! 293: #define bus_space_read_region_8(t, h, o, a, c) \
! 294: __abs_aligned_nonsingle(rr,8,(t),(h),(o),(a),(c))
! 295:
! 296:
! 297: /*
! 298: * void bus_space_read_raw_region_N(bus_space_tag_t tag,
! 299: * bus_space_handle_t bsh, bus_size_t offset,
! 300: * u_int8_t *addr, size_t count);
! 301: *
! 302: * Read `count' bytes in 2, 4 or 8 byte wide quantities from bus space
! 303: * described by tag/handle and starting at `offset' from the
! 304: * buffer provided. The buffer must have proper alignment for the N byte
! 305: * wide entities. Furthermore possible byte-swapping should be done by
! 306: * these functions.
! 307: */
! 308:
! 309: #define bus_space_read_raw_region_2(t, h, o, a, c) \
! 310: bus_space_read_region_2((t), (h), (o), (u_int16_t *)(a), (c) >> 1)
! 311: #define bus_space_read_raw_region_4(t, h, o, a, c) \
! 312: bus_space_read_region_4((t), (h), (o), (u_int32_t *)(a), (c) >> 2)
! 313:
! 314: /*
! 315: * Bus write (single) operations.
! 316: */
! 317: #define bus_space_write_1(t, h, o, v) __abs_ws(1,(t),(h),(o),(v))
! 318: #define bus_space_write_2(t, h, o, v) __abs_ws(2,(t),(h),(o),(v))
! 319: #define bus_space_write_4(t, h, o, v) __abs_ws(4,(t),(h),(o),(v))
! 320: #define bus_space_write_8(t, h, o, v) __abs_ws(8,(t),(h),(o),(v))
! 321:
! 322:
! 323: /*
! 324: * Bus write multiple operations.
! 325: */
! 326: #define bus_space_write_multi_1(t, h, o, a, c) \
! 327: __abs_nonsingle(wm,1,(t),(h),(o),(a),(c))
! 328: #define bus_space_write_multi_2(t, h, o, a, c) \
! 329: __abs_aligned_nonsingle(wm,2,(t),(h),(o),(a),(c))
! 330: #define bus_space_write_multi_4(t, h, o, a, c) \
! 331: __abs_aligned_nonsingle(wm,4,(t),(h),(o),(a),(c))
! 332: #define bus_space_write_multi_8(t, h, o, a, c) \
! 333: __abs_aligned_nonsingle(wm,8,(t),(h),(o),(a),(c))
! 334:
! 335: /*
! 336: * void bus_space_write_raw_multi_N(bus_space_tag_t tag,
! 337: * bus_space_handle_t bsh, bus_size_t offset,
! 338: * u_int8_t *addr, size_t count);
! 339: *
! 340: * Write `count' bytes in 2, 4 or 8 byte wide quantities from the buffer
! 341: * provided to bus space described by tag/handle/offset. The buffer
! 342: * must have proper alignment for the N byte wide entities. Furthermore
! 343: * possible byte-swapping should be done by these functions.
! 344: */
! 345:
! 346: #define bus_space_write_raw_multi_2(t, h, o, a, c) \
! 347: __abs_nonsingle(wrm,2,(t),(h),(o),(a),(c))
! 348: #define bus_space_write_raw_multi_4(t, h, o, a, c) \
! 349: __abs_nonsingle(wrm,4,(t),(h),(o),(a),(c))
! 350: #define bus_space_write_raw_multi_8(t, h, o, a, c) \
! 351: __abs_nonsingle(wrm,8,(t),(h),(o),(a),(c))
! 352:
! 353: /*
! 354: * Bus write region operations.
! 355: */
! 356: #define bus_space_write_region_1(t, h, o, a, c) \
! 357: __abs_nonsingle(wr,1,(t),(h),(o),(a),(c))
! 358: #define bus_space_write_region_2(t, h, o, a, c) \
! 359: __abs_aligned_nonsingle(wr,2,(t),(h),(o),(a),(c))
! 360: #define bus_space_write_region_4(t, h, o, a, c) \
! 361: __abs_aligned_nonsingle(wr,4,(t),(h),(o),(a),(c))
! 362: #define bus_space_write_region_8(t, h, o, a, c) \
! 363: __abs_aligned_nonsingle(wr,8,(t),(h),(o),(a),(c))
! 364:
! 365:
! 366: /*
! 367: * void bus_space_write_raw_region_N(bus_space_tag_t tag,
! 368: * bus_space_handle_t bsh, bus_size_t offset,
! 369: * const u_int8_t *addr, size_t count);
! 370: *
! 371: * Write `count' bytes in 2, 4 or 8 byte wide quantities to bus space
! 372: * described by tag/handle and starting at `offset' from the
! 373: * buffer provided. The buffer must have proper alignment for the N byte
! 374: * wide entities. Furthermore possible byte-swapping should be done by
! 375: * these functions.
! 376: */
! 377:
! 378: #define bus_space_write_raw_region_2(t, h, o, a, c) \
! 379: bus_space_write_region_2((t), (h), (o), (const u_int16_t *)(a), (c) >> 1)
! 380: #define bus_space_write_raw_region_4(t, h, o, a, c) \
! 381: bus_space_write_region_4((t), (h), (o), (const u_int32_t *)(a), (c) >> 2)
! 382:
! 383: /*
! 384: * Set multiple operations.
! 385: */
! 386: #define bus_space_set_multi_1(t, h, o, v, c) \
! 387: __abs_set(sm,1,(t),(h),(o),(v),(c))
! 388: #define bus_space_set_multi_2(t, h, o, v, c) \
! 389: __abs_set(sm,2,(t),(h),(o),(v),(c))
! 390: #define bus_space_set_multi_4(t, h, o, v, c) \
! 391: __abs_set(sm,4,(t),(h),(o),(v),(c))
! 392: #define bus_space_set_multi_8(t, h, o, v, c) \
! 393: __abs_set(sm,8,(t),(h),(o),(v),(c))
! 394:
! 395:
! 396: /*
! 397: * Set region operations.
! 398: */
! 399: #define bus_space_set_region_1(t, h, o, v, c) \
! 400: __abs_set(sr,1,(t),(h),(o),(v),(c))
! 401: #define bus_space_set_region_2(t, h, o, v, c) \
! 402: __abs_set(sr,2,(t),(h),(o),(v),(c))
! 403: #define bus_space_set_region_4(t, h, o, v, c) \
! 404: __abs_set(sr,4,(t),(h),(o),(v),(c))
! 405: #define bus_space_set_region_8(t, h, o, v, c) \
! 406: __abs_set(sr,8,(t),(h),(o),(v),(c))
! 407:
! 408:
! 409: /*
! 410: * Copy operations.
! 411: */
! 412: #define bus_space_copy_1(t, h1, o1, h2, o2, c) \
! 413: __abs_copy(1, t, h1, o1, h2, o2, c)
! 414: #define bus_space_copy_2(t, h1, o1, h2, o2, c) \
! 415: __abs_copy(2, t, h1, o1, h2, o2, c)
! 416: #define bus_space_copy_4(t, h1, o1, h2, o2, c) \
! 417: __abs_copy(4, t, h1, o1, h2, o2, c)
! 418: #define bus_space_copy_8(t, h1, o1, h2, o2, c) \
! 419: __abs_copy(8, t, h1, o1, h2, o2, c)
! 420:
! 421: /*
! 422: * Bus DMA methods.
! 423: */
! 424:
! 425: /*
! 426: * Flags used in various bus DMA methods.
! 427: */
! 428: #define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */
! 429: #define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */
! 430: #define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */
! 431: #define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */
! 432: #define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */
! 433: #define BUS_DMA_BUS2 0x020
! 434: #define BUS_DMA_BUS3 0x040
! 435: #define BUS_DMA_24BIT 0x080 /* isadma map */
! 436: #define BUS_DMA_STREAMING 0x100 /* hint: sequential, unidirectional */
! 437: #define BUS_DMA_READ 0x200 /* mapping is device -> memory only */
! 438: #define BUS_DMA_WRITE 0x400 /* mapping is memory -> device only */
! 439:
! 440: /*
! 441: * Private flags stored in the DMA map.
! 442: */
! 443: #define DMAMAP_NO_COALESCE 0x40000000 /* don't coalesce adjacent
! 444: segments */
! 445:
! 446: /* Forwards needed by prototypes below. */
! 447: struct mbuf;
! 448: struct uio;
! 449: struct alpha_sgmap;
! 450:
! 451: /*
! 452: * Operations performed by bus_dmamap_sync().
! 453: */
! 454: #define BUS_DMASYNC_PREREAD 0x01
! 455: #define BUS_DMASYNC_POSTREAD 0x02
! 456: #define BUS_DMASYNC_PREWRITE 0x04
! 457: #define BUS_DMASYNC_POSTWRITE 0x08
! 458:
! 459: /*
! 460: * alpha_bus_t
! 461: *
! 462: * Busses supported by NetBSD/alpha, used by internal
! 463: * utility functions. NOT TO BE USED BY MACHINE-INDEPENDENT
! 464: * CODE!
! 465: */
! 466: typedef enum {
! 467: ALPHA_BUS_TURBOCHANNEL,
! 468: ALPHA_BUS_PCI,
! 469: ALPHA_BUS_EISA,
! 470: ALPHA_BUS_ISA,
! 471: ALPHA_BUS_TLSB,
! 472: } alpha_bus_t;
! 473:
! 474: typedef struct alpha_bus_dma_tag *bus_dma_tag_t;
! 475: typedef struct alpha_bus_dmamap *bus_dmamap_t;
! 476:
! 477: /*
! 478: * bus_dma_segment_t
! 479: *
! 480: * Describes a single contiguous DMA transaction. Values
! 481: * are suitable for programming into DMA registers.
! 482: */
! 483: struct alpha_bus_dma_segment {
! 484: bus_addr_t ds_addr; /* DMA address */
! 485: bus_size_t ds_len; /* length of transfer */
! 486: };
! 487: typedef struct alpha_bus_dma_segment bus_dma_segment_t;
! 488:
! 489: /*
! 490: * bus_dma_tag_t
! 491: *
! 492: * A machine-dependent opaque type describing the implementation of
! 493: * DMA for a given bus.
! 494: */
! 495: struct alpha_bus_dma_tag {
! 496: void *_cookie; /* cookie used in the guts */
! 497: bus_addr_t _wbase; /* DMA window base */
! 498:
! 499: /*
! 500: * The following two members are used to chain DMA windows
! 501: * together. If, during the course of a map load, the
! 502: * resulting physical memory address is too large to
! 503: * be addressed by the window, the next window will be
! 504: * attempted. These would be chained together like so:
! 505: *
! 506: * direct -> sgmap -> NULL
! 507: * or
! 508: * sgmap -> NULL
! 509: * or
! 510: * direct -> NULL
! 511: *
! 512: * If the window size is 0, it will not be checked (e.g.
! 513: * TurboChannel DMA).
! 514: */
! 515: bus_size_t _wsize;
! 516: struct alpha_bus_dma_tag *_next_window;
! 517:
! 518: /*
! 519: * Some chipsets have a built-in boundary constraint, independent
! 520: * of what the device requests. This allows that boundary to
! 521: * be specified. If the device has a more restrictive constraint,
! 522: * the map will use that, otherwise this boundary will be used.
! 523: * This value is ignored if 0.
! 524: */
! 525: bus_size_t _boundary;
! 526:
! 527: /*
! 528: * A chipset may have more than one SGMAP window, so SGMAP
! 529: * windows also get a pointer to their SGMAP state.
! 530: */
! 531: struct alpha_sgmap *_sgmap;
! 532:
! 533: /*
! 534: * The SGMAP MMU implements a prefetch FIFO to keep data
! 535: * moving down the pipe, when doing host->bus DMA writes.
! 536: * The threshold (distance until the next page) used to
! 537: * trigger the prefetch is differnet on different chipsets,
! 538: * and we need to know what it is in order to know whether
! 539: * or not to allocate a spill page.
! 540: */
! 541: bus_size_t _pfthresh;
! 542:
! 543: /*
! 544: * Internal-use only utility methods. NOT TO BE USED BY
! 545: * MACHINE-INDEPENDENT CODE!
! 546: */
! 547: bus_dma_tag_t (*_get_tag)(bus_dma_tag_t, alpha_bus_t);
! 548:
! 549: /*
! 550: * DMA mapping methods.
! 551: */
! 552: int (*_dmamap_create)(bus_dma_tag_t, bus_size_t, int,
! 553: bus_size_t, bus_size_t, int, bus_dmamap_t *);
! 554: void (*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t);
! 555: int (*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *,
! 556: bus_size_t, struct proc *, int);
! 557: int (*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t,
! 558: struct mbuf *, int);
! 559: int (*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t,
! 560: struct uio *, int);
! 561: int (*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t,
! 562: bus_dma_segment_t *, int, bus_size_t, int);
! 563: void (*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t);
! 564: void (*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t,
! 565: bus_addr_t, bus_size_t, int);
! 566:
! 567: /*
! 568: * DMA memory utility functions.
! 569: */
! 570: int (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t,
! 571: bus_size_t, bus_dma_segment_t *, int, int *, int);
! 572: void (*_dmamem_free)(bus_dma_tag_t,
! 573: bus_dma_segment_t *, int);
! 574: int (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *,
! 575: int, size_t, caddr_t *, int);
! 576: void (*_dmamem_unmap)(bus_dma_tag_t, caddr_t, size_t);
! 577: paddr_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *,
! 578: int, off_t, int, int);
! 579: };
! 580:
! 581: #define alphabus_dma_get_tag(t, b) \
! 582: (*(t)->_get_tag)(t, b)
! 583:
! 584: #define bus_dmamap_create(t, s, n, m, b, f, p) \
! 585: (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p))
! 586: #define bus_dmamap_destroy(t, p) \
! 587: (*(t)->_dmamap_destroy)((t), (p))
! 588: #define bus_dmamap_load(t, m, b, s, p, f) \
! 589: (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f))
! 590: #define bus_dmamap_load_mbuf(t, m, b, f) \
! 591: (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f))
! 592: #define bus_dmamap_load_uio(t, m, u, f) \
! 593: (*(t)->_dmamap_load_uio)((t), (m), (u), (f))
! 594: #define bus_dmamap_load_raw(t, m, sg, n, s, f) \
! 595: (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f))
! 596: #define bus_dmamap_unload(t, p) \
! 597: (void)(t), \
! 598: (*(p)->_dm_window->_dmamap_unload)((p)->_dm_window, (p))
! 599: #define bus_dmamap_sync(t, p, a, s, op) \
! 600: (void)(t), \
! 601: (*(p)->_dm_window->_dmamap_sync)((p)->_dm_window, (p), (a), (s), (op))
! 602: #define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \
! 603: (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f))
! 604: #define bus_dmamem_free(t, sg, n) \
! 605: (*(t)->_dmamem_free)((t), (sg), (n))
! 606: #define bus_dmamem_map(t, sg, n, s, k, f) \
! 607: (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f))
! 608: #define bus_dmamem_unmap(t, k, s) \
! 609: (*(t)->_dmamem_unmap)((t), (k), (s))
! 610: #define bus_dmamem_mmap(t, sg, n, o, p, f) \
! 611: (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f))
! 612:
! 613: /*
! 614: * bus_dmamap_t
! 615: *
! 616: * Describes a DMA mapping.
! 617: */
! 618: struct alpha_bus_dmamap {
! 619: /*
! 620: * PRIVATE MEMBERS: not for use by machine-independent code.
! 621: */
! 622: bus_size_t _dm_size; /* largest DMA transfer mappable */
! 623: int _dm_segcnt; /* number of segs this map can map */
! 624: bus_size_t _dm_maxsegsz; /* largest possible segment */
! 625: bus_size_t _dm_boundary; /* don't cross this */
! 626: int _dm_flags; /* misc. flags */
! 627:
! 628: /*
! 629: * Private cookie to be used by the DMA back-end.
! 630: */
! 631: void *_dm_cookie;
! 632:
! 633: /*
! 634: * The DMA window that we ended up being mapped in.
! 635: */
! 636: bus_dma_tag_t _dm_window;
! 637:
! 638: /*
! 639: * PUBLIC MEMBERS: these are used by machine-independent code.
! 640: */
! 641: bus_size_t dm_mapsize; /* size of the mapping */
! 642: int dm_nsegs; /* # valid segments in mapping */
! 643: bus_dma_segment_t dm_segs[1]; /* segments; variable length */
! 644: };
! 645:
! 646: #ifdef _ALPHA_BUS_DMA_PRIVATE
! 647: int _bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t,
! 648: bus_size_t, int, bus_dmamap_t *);
! 649: void _bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t);
! 650:
! 651: int _bus_dmamap_load_direct(bus_dma_tag_t, bus_dmamap_t,
! 652: void *, bus_size_t, struct proc *, int);
! 653: int _bus_dmamap_load_mbuf_direct(bus_dma_tag_t,
! 654: bus_dmamap_t, struct mbuf *, int);
! 655: int _bus_dmamap_load_uio_direct(bus_dma_tag_t,
! 656: bus_dmamap_t, struct uio *, int);
! 657: int _bus_dmamap_load_raw_direct(bus_dma_tag_t,
! 658: bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int);
! 659:
! 660: void _bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t);
! 661: void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
! 662: bus_size_t, int);
! 663:
! 664: int _bus_dmamem_alloc(bus_dma_tag_t tag, bus_size_t size,
! 665: bus_size_t alignment, bus_size_t boundary,
! 666: bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags);
! 667: int _bus_dmamem_alloc_range(bus_dma_tag_t tag, bus_size_t size,
! 668: bus_size_t alignment, bus_size_t boundary,
! 669: bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags,
! 670: paddr_t low, paddr_t high);
! 671: void _bus_dmamem_free(bus_dma_tag_t tag, bus_dma_segment_t *segs,
! 672: int nsegs);
! 673: int _bus_dmamem_map(bus_dma_tag_t tag, bus_dma_segment_t *segs,
! 674: int nsegs, size_t size, caddr_t *kvap, int flags);
! 675: void _bus_dmamem_unmap(bus_dma_tag_t tag, caddr_t kva,
! 676: size_t size);
! 677: paddr_t _bus_dmamem_mmap(bus_dma_tag_t tag, bus_dma_segment_t *segs,
! 678: int nsegs, off_t off, int prot, int flags);
! 679: #endif /* _ALPHA_BUS_DMA_PRIVATE */
! 680:
! 681: #endif /* _ALPHA_BUS_H_ */
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