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Annotation of sys/arch/alpha/include/tc_machdep.h, Revision 1.1.1.1

1.1       nbrk        1: /* $OpenBSD: tc_machdep.h,v 1.3 2002/05/02 22:56:06 miod Exp $ */
                      2: /* $NetBSD: tc_machdep.h,v 1.4 2000/06/01 00:04:50 cgd Exp $ */
                      3:
                      4: /*
                      5:  * Copyright (c) 1994, 1995 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: /*
                     32:  * Machine-specific definitions for TurboChannel support.
                     33:  *
                     34:  * This file must typedef the following types:
                     35:  *
                     36:  *     tc_addr_t       TurboChannel bus address
                     37:  *     tc_offset_t     TurboChannel bus address difference (offset)
                     38:  *
                     39:  * This file must prototype or define the following functions
                     40:  * or macros (one or more of which may be no-ops):
                     41:  *
                     42:  *     tc_mb()         read/write memory barrier (any CPU<->memory
                     43:  *                     reads/writes before must complete before any
                     44:  *                     CPU<->memory reads/writes after).
                     45:  *     tc_wmb()        write memory barrier (any CPU<->memory writes
                     46:  *                     before must complete before any CPU<->memory
                     47:  *                     writes after).
                     48:  *     tc_syncbus()    sync TC bus; make sure CPU writes are
                     49:  *                     propagated across the TurboChannel bus.
                     50:  *     tc_badaddr()    return non-zero if the given address is invalid.
                     51:  *     TC_DENSE_TO_SPARSE()
                     52:  *                     convert the given physical address in
                     53:  *                     TurboChannel dense space to the corresponding
                     54:  *                     address in TurboChannel sparse space.
                     55:  *     TC_PHYS_TO_UNCACHED()
                     56:  *                     convert the given system memory physical address
                     57:  *                     to the physical address of the corresponding
                     58:  *                     region that is not cached.
                     59:  */
                     60:
                     61: typedef u_int64_t      tc_addr_t;
                     62: typedef int32_t                tc_offset_t;
                     63:
                     64: #define        tc_mb()         alpha_mb()
                     65: #define        tc_wmb()        alpha_wmb()
                     66:
                     67: /*
                     68:  * A junk address to read from, to make sure writes are complete.  See
                     69:  * System Programmer's Manual, section 9.3 (p. 9-4), and sacrifice a
                     70:  * chicken.
                     71:  */
                     72: #define        tc_syncbus()                                                    \
                     73:     do {                                                               \
                     74:        volatile u_int32_t no_optimize;                                 \
                     75:        no_optimize =                                                   \
                     76:            *(volatile u_int32_t *)ALPHA_PHYS_TO_K0SEG(0x00000001f0080220); \
                     77:     } while (0)
                     78:
                     79: #define        tc_badaddr(tcaddr)                                              \
                     80:     badaddr((void *)(tcaddr), sizeof (u_int32_t))
                     81:
                     82: #define        TC_SPACE_IND            0xffffffffe0000003
                     83: #define        TC_SPACE_DENSE          0x0000000000000000
                     84: #define TC_SPACE_DENSE_OFFSET  0x0000000007fffffc
                     85: #define        TC_SPACE_SPARSE         0x0000000010000000
                     86: #define        TC_SPACE_SPARSE_OFFSET  0x000000000ffffff8
                     87:
                     88: #define        TC_DENSE_TO_SPARSE(addr)                                        \
                     89:     (((addr) & TC_SPACE_IND) | TC_SPACE_SPARSE |                       \
                     90:        (((addr) & TC_SPACE_DENSE_OFFSET) << 1))
                     91:
                     92: #define        TC_PHYS_TO_UNCACHED(addr)                                       \
                     93:     (addr)
                     94:
                     95: /*
                     96:  * These functions are private, and may not be called by
                     97:  * machine-independent code.
                     98:  */
                     99: bus_space_tag_t tc_bus_mem_init(void *memv);
                    100: void tc_dma_init(void);
                    101:
                    102: /*
                    103:  * Address of scatter/gather SRAM on the 3000/500-series.
                    104:  *
                    105:  * There is room for 32K entries, yielding 256M of sgva space.
                    106:  * The page table is readable in both dense and sparse space.
                    107:  * The page table is writable only in sparse space.
                    108:  *
                    109:  * In sparse space, the 32-bit PTEs are followed by 32-bits
                    110:  * of pad.
                    111:  */
                    112: #define        TC_SGSRAM_DENSE         0x0000001c2800000UL
                    113: #define        TC_SGSRAM_SPARSE        0x0000001d5000000UL