forked from Minki/linux
97dcb82de6
The irq_base for {mips,rm7k,rm9k}_cpu_irq_init() are constant on all
platforms and are same value on most platforms (0 or 16, depends on
CONFIG_I8259). Define them in asm-mips/mach-generic/irq.h and make
them customizable. This will save a few cycle on each CPU interrupt.
A good side effect is removing some dependencies to MALTA in generic
SMTC code.
Although MIPS_CPU_IRQ_BASE is customizable, this patch changes irq
mappings on DDB5477, EMMA2RH and MIPS_SIM, since really customizing
them might cause some header dependency problem and there seems no
good reason to customize it. So currently only VR41XX is using custom
MIPS_CPU_IRQ_BASE value, which is 0 regardless of CONFIG_I8259.
Testing this patch on those platforms is greatly appreciated. Thank
you.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
96 lines
3.2 KiB
C
96 lines
3.2 KiB
C
/*
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* Lowlevel hardware stuff for the MIPS based Cobalt microservers.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1997 Cobalt Microserver
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* Copyright (C) 1997, 2003 Ralf Baechle
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* Copyright (C) 2001, 2002, 2003 Liam Davies (ldavies@agile.tv)
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*/
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#ifndef __ASM_COBALT_H
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#define __ASM_COBALT_H
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#include <irq.h>
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/*
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* i8259 legacy interrupts used on Cobalt:
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*
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* 8 - RTC
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* 9 - PCI
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* 14 - IDE0
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* 15 - IDE1
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*/
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#define COBALT_QUBE_SLOT_IRQ 9
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/*
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* CPU IRQs are 16 ... 23
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*/
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#define COBALT_CPU_IRQ MIPS_CPU_IRQ_BASE
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#define COBALT_GALILEO_IRQ (COBALT_CPU_IRQ + 2)
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#define COBALT_SCC_IRQ (COBALT_CPU_IRQ + 3) /* pre-production has 85C30 */
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#define COBALT_RAQ_SCSI_IRQ (COBALT_CPU_IRQ + 3)
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#define COBALT_ETH0_IRQ (COBALT_CPU_IRQ + 3)
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#define COBALT_QUBE1_ETH0_IRQ (COBALT_CPU_IRQ + 4)
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#define COBALT_ETH1_IRQ (COBALT_CPU_IRQ + 4)
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#define COBALT_SERIAL_IRQ (COBALT_CPU_IRQ + 5)
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#define COBALT_SCSI_IRQ (COBALT_CPU_IRQ + 5)
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#define COBALT_VIA_IRQ (COBALT_CPU_IRQ + 6) /* Chained to VIA ISA bridge */
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/*
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* PCI configuration space manifest constants. These are wired into
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* the board layout according to the PCI spec to enable the software
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* to probe the hardware configuration space in a well defined manner.
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*
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* The PCI_DEVSHFT() macro transforms these values into numbers
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* suitable for passing as the dev parameter to the various
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* pcibios_read/write_config routines.
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*/
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#define COBALT_PCICONF_CPU 0x06
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#define COBALT_PCICONF_ETH0 0x07
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#define COBALT_PCICONF_RAQSCSI 0x08
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#define COBALT_PCICONF_VIA 0x09
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#define COBALT_PCICONF_PCISLOT 0x0A
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#define COBALT_PCICONF_ETH1 0x0C
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/*
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* The Cobalt board id information. The boards have an ID number wired
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* into the VIA that is available in the high nibble of register 94.
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* This register is available in the VIA configuration space through the
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* interface routines qube_pcibios_read/write_config. See cobalt/pci.c
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*/
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#define VIA_COBALT_BRD_ID_REG 0x94
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#define VIA_COBALT_BRD_REG_to_ID(reg) ((unsigned char) (reg) >> 4)
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#define COBALT_BRD_ID_QUBE1 0x3
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#define COBALT_BRD_ID_RAQ1 0x4
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#define COBALT_BRD_ID_QUBE2 0x5
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#define COBALT_BRD_ID_RAQ2 0x6
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#define PCI_CFG_SET(devfn,where) \
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GT_WRITE(GT_PCI0_CFGADDR_OFS, (0x80000000 | (PCI_SLOT (devfn) << 11) | \
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(PCI_FUNC (devfn) << 8) | (where)))
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#define COBALT_LED_PORT (*(volatile unsigned char *) CKSEG1ADDR(0x1c000000))
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# define COBALT_LED_BAR_LEFT (1 << 0) /* Qube */
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# define COBALT_LED_BAR_RIGHT (1 << 1) /* Qube */
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# define COBALT_LED_WEB (1 << 2) /* RaQ */
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# define COBALT_LED_POWER_OFF (1 << 3) /* RaQ */
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# define COBALT_LED_RESET 0x0f
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#define COBALT_KEY_PORT ((~*(volatile unsigned int *) CKSEG1ADDR(0x1d000000) >> 24) & COBALT_KEY_MASK)
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# define COBALT_KEY_CLEAR (1 << 1)
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# define COBALT_KEY_LEFT (1 << 2)
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# define COBALT_KEY_UP (1 << 3)
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# define COBALT_KEY_DOWN (1 << 4)
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# define COBALT_KEY_RIGHT (1 << 5)
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# define COBALT_KEY_ENTER (1 << 6)
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# define COBALT_KEY_SELECT (1 << 7)
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# define COBALT_KEY_MASK 0xfe
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#define COBALT_UART ((volatile unsigned char *) CKSEG1ADDR(0x1c800000))
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#endif /* __ASM_COBALT_H */
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