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_EV5_MMU \ 48 .max_asn = EV5_MAX_ASN \ 49 50 #define DO_EV6_MMU \ 51 .max_asn = EV6_MAX_ASN \ 52 53 #define DO_EV7_MMU \ 54 .max_asn = EV6_MAX_ASN \ 55 56 #define IO_LITE(UP,low) \ 57 .hae_register = (unsigned long *) CAT(UP,_HAE_ADDRESS), \ 58 .iack_sc = CAT(UP,_IACK_SC), \ 59 .mv_ioread8 = CAT(low,_ioread8), \ 60 .mv_ioread16 = CAT(low,_ioread16), \ 61 .mv_ioread32 = CAT(low,_ioread32), \ 62 .mv_ioread64 = CAT(low,_ioread64), \ 63 .mv_iowrite8 = CAT(low,_iowrite8), \ 64 .mv_iowrite16 = CAT(low,_iowrite16), \ 65 .mv_iowrite32 = CAT(low,_iowrite32), \ 66 .mv_iowrite64 = CAT(low,_iowrite64), \ 67 .mv_readb = CAT(low,_readb), \ 68 .mv_readw = CAT(low,_readw), \ 69 .mv_readl = CAT(low,_readl), \ 70 .mv_readq = CAT(low,_readq), \ 71 .mv_writeb = CAT(low,_writeb), \ 72 .mv_writew = CAT(low,_writew), \ 73 .mv_writel = CAT(low,_writel), \ 74 .mv_writeq = CAT(low,_writeq), \ 75 .mv_ioportmap = CAT(low,_ioportmap), \ 76 .mv_ioremap = CAT(low,_ioremap), \ 77 .mv_iounmap = CAT(low,_iounmap), \ 78 .mv_is_ioaddr = CAT(low,_is_ioaddr), \ 79 .mv_is_mmio = CAT(low,_is_mmio) \ 80 81 #define IO(UP,low) \ 82 IO_LITE(UP,low), \ 83 .pci_ops = &CAT(low,_pci_ops), \ 84 .mv_pci_tbi = CAT(low,_pci_tbi) 85 86 #define DO_APECS_IO IO(APECS,apecs) 87 #define DO_CIA_IO IO(CIA,cia) 88 #define DO_IRONGATE_IO IO(IRONGATE,irongate) 89 #define DO_LCA_IO IO(LCA,lca) 90 #define DO_MARVEL_IO IO(MARVEL,marvel) 91 #define DO_MCPCIA_IO IO(MCPCIA,mcpcia) 92 #define DO_POLARIS_IO IO(POLARIS,polaris) 93 #define DO_T2_IO IO(T2,t2) 94 #define DO_TSUNAMI_IO IO(TSUNAMI,tsunami) 95 #define DO_TITAN_IO IO(TITAN,titan) 96 #define DO_WILDFIRE_IO IO(WILDFIRE,wildfire) 97 98 #define DO_PYXIS_IO IO_LITE(CIA,cia_bwx), \ 99 .pci_ops = &cia_pci_ops, \ 100 .mv_pci_tbi = cia_pci_tbi 101 102 /* 103 * In a GENERIC kernel, we have lots of these vectors floating about, 104 * all but one of which we want to go away. In a non-GENERIC kernel, 105 * we want only one, ever. 106 * 107 * Accomplish this in the GENERIC kernel by putting all of the vectors 108 * in the .init.data section where they'll go away. We'll copy the 109 * one we want to the real alpha_mv vector in setup_arch. 110 * 111 * Accomplish this in a non-GENERIC kernel by ifdef'ing out all but 112 * one of the vectors, which will not reside in .init.data. We then 113 * alias this one vector to alpha_mv, so no copy is needed. 114 * 115 * Upshot: set __initdata to nothing for non-GENERIC kernels. 116 */ 117 118 #ifdef CONFIG_ALPHA_GENERIC 119 #define __initmv __initdata 120 #define ALIAS_MV(x) 121 #else 122 #define __initmv __refdata 123 124 /* GCC actually has a syntax for defining aliases, but is under some 125 delusion that you shouldn't be able to declare it extern somewhere 126 else beforehand. Fine. We'll do it ourselves. */ 127 #if 0 128 #define ALIAS_MV(system) \ 129 struct alpha_machine_vector alpha_mv __attribute__((alias(#system "_mv"))); \ 130 EXPORT_SYMBOL(alpha_mv); 131 #else 132 #define ALIAS_MV(system) \ 133 asm(".global alpha_mv\nalpha_mv = " #system "_mv"); \ 134 EXPORT_SYMBOL(alpha_mv); 135 #endif 136 #endif /* GENERIC */ 137