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89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
/* $NetBSD: sti_pci_machdep.c,v 1.1 2014/02/24 07:23:43 skrll Exp $ */
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/* $OpenBSD: sti_pci_machdep.c,v 1.2 2009/04/10 17:11:27 miod Exp $ */
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/*
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* Copyright (c) 2007, 2009 Miodrag Vallat.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice, this permission notice, and the disclaimer below
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* appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <machine/iomod.h>
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#include <machine/autoconf.h>
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#include <dev/pci/pcivar.h>
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#include <hppa/hppa/machdep.h>
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int sti_pci_is_console(struct pci_attach_args *, bus_addr_t *);
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int
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sti_pci_is_console(struct pci_attach_args *paa, bus_addr_t *bases)
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{
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hppa_hpa_t consaddr;
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uint32_t cf;
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int pagezero_cookie;
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int bar;
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int rc;
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KASSERT(paa != NULL);
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pagezero_cookie = hppa_pagezero_map();
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consaddr = (hppa_hpa_t)PAGE0->mem_cons.pz_hpa;
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hppa_pagezero_unmap(pagezero_cookie);
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/*
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* PAGE0 console information will point to one of our BARs,
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* but depending on the particular sti model, this might not
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* be the BAR mapping the rom (region #0).
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*
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* For example, on Visualize FXe, regions #0, #2 and #3 are
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* mapped by BAR 0x18, while region #1 is mapped by BAR 0x10,
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* which matches PAGE0 console address.
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*
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* Rather than trying to be smart, reread the region->BAR array
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* again, and compare the BAR mapping region #1 against PAGE0
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* values, we simply try all the valid BARs; if any of them
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* matches what PAGE0 says, then we are the console, and it
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* doesn't matter which BAR matched.
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*/
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for (bar = PCI_MAPREG_START; bar <= PCI_MAPREG_PPB_END; ) {
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bus_addr_t addr;
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bus_size_t size;
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cf = pci_conf_read(paa->pa_pc, paa->pa_tag, bar);
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rc = pci_mapreg_info(paa->pa_pc, paa->pa_tag, bar,
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PCI_MAPREG_TYPE(cf), &addr, &size, NULL);
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if (PCI_MAPREG_TYPE(cf) == PCI_MAPREG_TYPE_IO) {
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bar += 4;
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} else {
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if (PCI_MAPREG_MEM_TYPE(cf) ==
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PCI_MAPREG_MEM_TYPE_64BIT)
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bar += 8;
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else
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bar += 4;
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}
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if (rc == 0 && (hppa_hpa_t)addr == consaddr)
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return 1;
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}
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return 0;
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}
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