96 строки
2.0 KiB
C
96 строки
2.0 KiB
C
/*
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* TURBOchannel architecture calls.
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*
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* Copyright (c) Harald Koerfgen, 1998
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* Copyright (c) 2001, 2003, 2005, 2006 Maciej W. Rozycki
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* Copyright (c) 2005 James Simmons
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*
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* This file is subject to the terms and conditions of the GNU
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* General Public License. See the file "COPYING" in the main
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* directory of this archive for more details.
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*/
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#include <linux/compiler.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/tc.h>
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#include <linux/types.h>
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#include <asm/addrspace.h>
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#include <asm/bootinfo.h>
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#include <asm/paccess.h>
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#include <asm/dec/interrupts.h>
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#include <asm/dec/prom.h>
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#include <asm/dec/system.h>
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/*
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* Protected read byte from TURBOchannel slot space.
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*/
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int tc_preadb(u8 *valp, void __iomem *addr)
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{
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return get_dbe(*valp, (u8 *)addr);
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}
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/*
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* Get TURBOchannel bus information as specified by the spec, plus
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* the slot space base address and the number of slots.
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*/
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int __init tc_bus_get_info(struct tc_bus *tbus)
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{
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if (!dec_tc_bus)
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return -ENXIO;
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memcpy(&tbus->info, rex_gettcinfo(), sizeof(tbus->info));
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tbus->slot_base = CPHYSADDR((long)rex_slot_address(0));
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switch (mips_machtype) {
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case MACH_DS5000_200:
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tbus->num_tcslots = 7;
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break;
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case MACH_DS5000_2X0:
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case MACH_DS5900:
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tbus->ext_slot_base = 0x20000000;
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tbus->ext_slot_size = 0x20000000;
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fallthrough;
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case MACH_DS5000_1XX:
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tbus->num_tcslots = 3;
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break;
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case MACH_DS5000_XX:
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tbus->num_tcslots = 2;
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default:
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break;
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}
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return 0;
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}
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/*
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* Get the IRQ for the specified slot.
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*/
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void __init tc_device_get_irq(struct tc_dev *tdev)
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{
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switch (tdev->slot) {
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case 0:
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tdev->interrupt = dec_interrupt[DEC_IRQ_TC0];
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break;
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case 1:
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tdev->interrupt = dec_interrupt[DEC_IRQ_TC1];
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break;
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case 2:
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tdev->interrupt = dec_interrupt[DEC_IRQ_TC2];
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break;
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/*
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* Yuck! DS5000/200 onboard devices
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*/
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case 5:
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tdev->interrupt = dec_interrupt[DEC_IRQ_TC5];
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break;
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case 6:
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tdev->interrupt = dec_interrupt[DEC_IRQ_TC6];
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break;
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default:
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tdev->interrupt = -1;
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break;
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}
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}
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