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