arch/alpha/kernel/machvec_impl.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *      linux/arch/alpha/kernel/machvec_impl.h
   4  *
   5  *      Copyright (C) 1997, 1998  Richard Henderson
   6  *
   7  * This file has goodies to help simplify instantiation of machine vectors.
   8  */
   9
  10 #include <asm/pgalloc.h>
  11
  12 /* Whee.  These systems don't have an HAE:
  13        IRONGATE, MARVEL, POLARIS, TSUNAMI, TITAN, WILDFIRE
  14    Fix things up for the GENERIC kernel by defining the HAE address
  15    to be that of the cache. Now we can read and write it as we like.  ;-)  */
  16 #define IRONGATE_HAE_ADDRESS    (&alpha_mv.hae_cache)
  17 #define MARVEL_HAE_ADDRESS      (&alpha_mv.hae_cache)
  18 #define POLARIS_HAE_ADDRESS     (&alpha_mv.hae_cache)
  19 #define TSUNAMI_HAE_ADDRESS     (&alpha_mv.hae_cache)
  20 #define TITAN_HAE_ADDRESS       (&alpha_mv.hae_cache)
  21 #define WILDFIRE_HAE_ADDRESS    (&alpha_mv.hae_cache)
  22
  23 #ifdef CIA_ONE_HAE_WINDOW
  24 #define CIA_HAE_ADDRESS         (&alpha_mv.hae_cache)
  25 #endif
  26 #ifdef MCPCIA_ONE_HAE_WINDOW
  27 #define MCPCIA_HAE_ADDRESS      (&alpha_mv.hae_cache)
  28 #endif
  29 #ifdef T2_ONE_HAE_WINDOW
  30 #define T2_HAE_ADDRESS          (&alpha_mv.hae_cache)
  31 #endif
  32
  33 /* Only a few systems don't define IACK_SC, handling all interrupts through
  34    the SRM console.  But splitting out that one case from IO() below
  35    seems like such a pain.  Define this to get things to compile.  */
  36 #define JENSEN_IACK_SC          1
  37 #define T2_IACK_SC              1
  38 #define WILDFIRE_IACK_SC        1 /* FIXME */
  39
  40 /*
  41  * Some helpful macros for filling in the blanks.
  42  */
  43
  44 #define CAT1(x,y)  x##y
  45 #define CAT(x,y)   CAT1(x,y)
  46
  47 #define DO_DEFAULT_RTC                  .rtc_port = 0x70
  48
  49 #define DO_EV4_MMU                                                      \
  50         .max_asn =                      EV4_MAX_ASN,                    \
  51         .mv_switch_mm =                 ev4_switch_mm,                  \
  52         .mv_activate_mm =               ev4_activate_mm,                \
  53         .mv_flush_tlb_current =         ev4_flush_tlb_current,          \
  54         .mv_flush_tlb_current_page =    ev4_flush_tlb_current_page
  55
  56 #define DO_EV5_MMU                                                      \
  57         .max_asn =                      EV5_MAX_ASN,                    \
  58         .mv_switch_mm =                 ev5_switch_mm,                  \
  59         .mv_activate_mm =               ev5_activate_mm,                \
  60         .mv_flush_tlb_current =         ev5_flush_tlb_current,          \
  61         .mv_flush_tlb_current_page =    ev5_flush_tlb_current_page
  62
  63 #define DO_EV6_MMU                                                      \
  64         .max_asn =                      EV6_MAX_ASN,                    \
  65         .mv_switch_mm =                 ev5_switch_mm,                  \
  66         .mv_activate_mm =               ev5_activate_mm,                \
  67         .mv_flush_tlb_current =         ev5_flush_tlb_current,          \
  68         .mv_flush_tlb_current_page =    ev5_flush_tlb_current_page
  69
  70 #define DO_EV7_MMU                                                      \
  71         .max_asn =                      EV6_MAX_ASN,                    \
  72         .mv_switch_mm =                 ev5_switch_mm,                  \
  73         .mv_activate_mm =               ev5_activate_mm,                \
  74         .mv_flush_tlb_current =         ev5_flush_tlb_current,          \
  75         .mv_flush_tlb_current_page =    ev5_flush_tlb_current_page
  76
  77 #define IO_LITE(UP,low)                                                 \
  78         .hae_register =         (unsigned long *) CAT(UP,_HAE_ADDRESS), \
  79         .iack_sc =              CAT(UP,_IACK_SC),                       \
  80         .mv_ioread8 =           CAT(low,_ioread8),                      \
  81         .mv_ioread16 =          CAT(low,_ioread16),                     \
  82         .mv_ioread32 =          CAT(low,_ioread32),                     \
  83         .mv_iowrite8 =          CAT(low,_iowrite8),                     \
  84         .mv_iowrite16 =         CAT(low,_iowrite16),                    \
  85         .mv_iowrite32 =         CAT(low,_iowrite32),                    \
  86         .mv_readb =             CAT(low,_readb),                        \
  87         .mv_readw =             CAT(low,_readw),                        \
  88         .mv_readl =             CAT(low,_readl),                        \
  89         .mv_readq =             CAT(low,_readq),                        \
  90         .mv_writeb =            CAT(low,_writeb),                       \
  91         .mv_writew =            CAT(low,_writew),                       \
  92         .mv_writel =            CAT(low,_writel),                       \
  93         .mv_writeq =            CAT(low,_writeq),                       \
  94         .mv_ioportmap =         CAT(low,_ioportmap),                    \
  95         .mv_ioremap =           CAT(low,_ioremap),                      \
  96         .mv_iounmap =           CAT(low,_iounmap),                      \
  97         .mv_is_ioaddr =         CAT(low,_is_ioaddr),                    \
  98         .mv_is_mmio =           CAT(low,_is_mmio)                       \
  99
 100 #define IO(UP,low)                                                      \
 101         IO_LITE(UP,low),                                                \
 102         .pci_ops =              &CAT(low,_pci_ops),                     \
 103         .mv_pci_tbi =           CAT(low,_pci_tbi)
 104
 105 #define DO_APECS_IO     IO(APECS,apecs)
 106 #define DO_CIA_IO       IO(CIA,cia)
 107 #define DO_IRONGATE_IO  IO(IRONGATE,irongate)
 108 #define DO_LCA_IO       IO(LCA,lca)
 109 #define DO_MARVEL_IO    IO(MARVEL,marvel)
 110 #define DO_MCPCIA_IO    IO(MCPCIA,mcpcia)
 111 #define DO_POLARIS_IO   IO(POLARIS,polaris)
 112 #define DO_T2_IO        IO(T2,t2)
 113 #define DO_TSUNAMI_IO   IO(TSUNAMI,tsunami)
 114 #define DO_TITAN_IO     IO(TITAN,titan)
 115 #define DO_WILDFIRE_IO  IO(WILDFIRE,wildfire)
 116
 117 #define DO_PYXIS_IO     IO_LITE(CIA,cia_bwx), \
 118                         .pci_ops = &cia_pci_ops, \
 119                         .mv_pci_tbi = cia_pci_tbi
 120
 121 /*
 122  * In a GENERIC kernel, we have lots of these vectors floating about,
 123  * all but one of which we want to go away.  In a non-GENERIC kernel,
 124  * we want only one, ever.
 125  *
 126  * Accomplish this in the GENERIC kernel by putting all of the vectors
 127  * in the .init.data section where they'll go away.  We'll copy the
 128  * one we want to the real alpha_mv vector in setup_arch.
 129  *
 130  * Accomplish this in a non-GENERIC kernel by ifdef'ing out all but
 131  * one of the vectors, which will not reside in .init.data.  We then
 132  * alias this one vector to alpha_mv, so no copy is needed.
 133  *
 134  * Upshot: set __initdata to nothing for non-GENERIC kernels.
 135  */
 136
 137 #ifdef CONFIG_ALPHA_GENERIC
 138 #define __initmv __initdata
 139 #define ALIAS_MV(x)
 140 #else
 141 #define __initmv __refdata
 142
 143 /* GCC actually has a syntax for defining aliases, but is under some
 144    delusion that you shouldn't be able to declare it extern somewhere
 145    else beforehand.  Fine.  We'll do it ourselves.  */
 146 #if 0
 147 #define ALIAS_MV(system) \
 148   struct alpha_machine_vector alpha_mv __attribute__((alias(#system "_mv"))); \
 149   EXPORT_SYMBOL(alpha_mv);
 150 #else
 151 #define ALIAS_MV(system) \
 152   asm(".global alpha_mv\nalpha_mv = " #system "_mv"); \
 153   EXPORT_SYMBOL(alpha_mv);
 154 #endif
 155 #endif /* GENERIC */