98c532ecbe
T2 are the only alpha SMP systems that do HAE switching at runtime, which is fundamentally racy on SMP. This patch limits MMIO space on T2 to HAE0 only, like we did on MCPCIA (rawhide) long ago. This leaves us with only 112 Mb of PCI MMIO (128 Mb HAE aperture minus 16 Mb reserved for EISA), but since linux PCI allocations are reasonably tight, it should be enough for sane hardware configurations. Also, fix a typo in MCPCIA_FROB_MMIO macro which shouldn't call set_hae() if MCPCIA_ONE_HAE_WINDOW is defined. It's more for correctness, as set_hae() is a no-op anyway in that case. Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
156 lines
5.1 KiB
C
156 lines
5.1 KiB
C
/*
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* linux/arch/alpha/kernel/machvec_impl.h
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*
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* Copyright (C) 1997, 1998 Richard Henderson
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*
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* This file has goodies to help simplify instantiation of machine vectors.
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*/
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#include <asm/pgalloc.h>
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/* Whee. These systems don't have an HAE:
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IRONGATE, MARVEL, POLARIS, TSUNAMI, TITAN, WILDFIRE
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Fix things up for the GENERIC kernel by defining the HAE address
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to be that of the cache. Now we can read and write it as we like. ;-) */
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#define IRONGATE_HAE_ADDRESS (&alpha_mv.hae_cache)
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#define MARVEL_HAE_ADDRESS (&alpha_mv.hae_cache)
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#define POLARIS_HAE_ADDRESS (&alpha_mv.hae_cache)
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#define TSUNAMI_HAE_ADDRESS (&alpha_mv.hae_cache)
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#define TITAN_HAE_ADDRESS (&alpha_mv.hae_cache)
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#define WILDFIRE_HAE_ADDRESS (&alpha_mv.hae_cache)
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#ifdef CIA_ONE_HAE_WINDOW
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#define CIA_HAE_ADDRESS (&alpha_mv.hae_cache)
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#endif
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#ifdef MCPCIA_ONE_HAE_WINDOW
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#define MCPCIA_HAE_ADDRESS (&alpha_mv.hae_cache)
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#endif
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#ifdef T2_ONE_HAE_WINDOW
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#define T2_HAE_ADDRESS (&alpha_mv.hae_cache)
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#endif
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/* Only a few systems don't define IACK_SC, handling all interrupts through
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the SRM console. But splitting out that one case from IO() below
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seems like such a pain. Define this to get things to compile. */
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#define JENSEN_IACK_SC 1
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#define T2_IACK_SC 1
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#define WILDFIRE_IACK_SC 1 /* FIXME */
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/*
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* Some helpful macros for filling in the blanks.
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*/
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#define CAT1(x,y) x##y
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#define CAT(x,y) CAT1(x,y)
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#define DO_DEFAULT_RTC \
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.rtc_port = 0x70, \
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.rtc_get_time = common_get_rtc_time, \
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.rtc_set_time = common_set_rtc_time
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#define DO_EV4_MMU \
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.max_asn = EV4_MAX_ASN, \
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.mv_switch_mm = ev4_switch_mm, \
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.mv_activate_mm = ev4_activate_mm, \
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.mv_flush_tlb_current = ev4_flush_tlb_current, \
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.mv_flush_tlb_current_page = ev4_flush_tlb_current_page
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#define DO_EV5_MMU \
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.max_asn = EV5_MAX_ASN, \
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.mv_switch_mm = ev5_switch_mm, \
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.mv_activate_mm = ev5_activate_mm, \
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.mv_flush_tlb_current = ev5_flush_tlb_current, \
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.mv_flush_tlb_current_page = ev5_flush_tlb_current_page
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#define DO_EV6_MMU \
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.max_asn = EV6_MAX_ASN, \
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.mv_switch_mm = ev5_switch_mm, \
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.mv_activate_mm = ev5_activate_mm, \
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.mv_flush_tlb_current = ev5_flush_tlb_current, \
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.mv_flush_tlb_current_page = ev5_flush_tlb_current_page
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#define DO_EV7_MMU \
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.max_asn = EV6_MAX_ASN, \
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.mv_switch_mm = ev5_switch_mm, \
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.mv_activate_mm = ev5_activate_mm, \
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.mv_flush_tlb_current = ev5_flush_tlb_current, \
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.mv_flush_tlb_current_page = ev5_flush_tlb_current_page
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#define IO_LITE(UP,low) \
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.hae_register = (unsigned long *) CAT(UP,_HAE_ADDRESS), \
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.iack_sc = CAT(UP,_IACK_SC), \
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.mv_ioread8 = CAT(low,_ioread8), \
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.mv_ioread16 = CAT(low,_ioread16), \
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.mv_ioread32 = CAT(low,_ioread32), \
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.mv_iowrite8 = CAT(low,_iowrite8), \
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.mv_iowrite16 = CAT(low,_iowrite16), \
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.mv_iowrite32 = CAT(low,_iowrite32), \
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.mv_readb = CAT(low,_readb), \
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.mv_readw = CAT(low,_readw), \
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.mv_readl = CAT(low,_readl), \
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.mv_readq = CAT(low,_readq), \
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.mv_writeb = CAT(low,_writeb), \
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.mv_writew = CAT(low,_writew), \
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.mv_writel = CAT(low,_writel), \
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.mv_writeq = CAT(low,_writeq), \
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.mv_ioportmap = CAT(low,_ioportmap), \
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.mv_ioremap = CAT(low,_ioremap), \
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.mv_iounmap = CAT(low,_iounmap), \
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.mv_is_ioaddr = CAT(low,_is_ioaddr), \
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.mv_is_mmio = CAT(low,_is_mmio) \
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#define IO(UP,low) \
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IO_LITE(UP,low), \
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.pci_ops = &CAT(low,_pci_ops), \
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.mv_pci_tbi = CAT(low,_pci_tbi)
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#define DO_APECS_IO IO(APECS,apecs)
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#define DO_CIA_IO IO(CIA,cia)
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#define DO_IRONGATE_IO IO(IRONGATE,irongate)
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#define DO_LCA_IO IO(LCA,lca)
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#define DO_MARVEL_IO IO(MARVEL,marvel)
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#define DO_MCPCIA_IO IO(MCPCIA,mcpcia)
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#define DO_POLARIS_IO IO(POLARIS,polaris)
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#define DO_T2_IO IO(T2,t2)
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#define DO_TSUNAMI_IO IO(TSUNAMI,tsunami)
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#define DO_TITAN_IO IO(TITAN,titan)
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#define DO_WILDFIRE_IO IO(WILDFIRE,wildfire)
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#define DO_PYXIS_IO IO_LITE(CIA,cia_bwx), \
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.pci_ops = &cia_pci_ops, \
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.mv_pci_tbi = cia_pci_tbi
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/*
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* In a GENERIC kernel, we have lots of these vectors floating about,
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* all but one of which we want to go away. In a non-GENERIC kernel,
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* we want only one, ever.
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*
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* Accomplish this in the GENERIC kernel by putting all of the vectors
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* in the .init.data section where they'll go away. We'll copy the
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* one we want to the real alpha_mv vector in setup_arch.
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*
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* Accomplish this in a non-GENERIC kernel by ifdef'ing out all but
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* one of the vectors, which will not reside in .init.data. We then
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* alias this one vector to alpha_mv, so no copy is needed.
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*
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* Upshot: set __initdata to nothing for non-GENERIC kernels.
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*/
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#ifdef CONFIG_ALPHA_GENERIC
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#define __initmv __initdata
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#define ALIAS_MV(x)
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#else
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#define __initmv __initdata_refok
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/* GCC actually has a syntax for defining aliases, but is under some
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delusion that you shouldn't be able to declare it extern somewhere
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else beforehand. Fine. We'll do it ourselves. */
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#if 0
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#define ALIAS_MV(system) \
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struct alpha_machine_vector alpha_mv __attribute__((alias(#system "_mv")));
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#else
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#define ALIAS_MV(system) \
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asm(".global alpha_mv\nalpha_mv = " #system "_mv");
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#endif
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#endif /* GENERIC */
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