128 lines
3.2 KiB
ArmAsm
128 lines
3.2 KiB
ArmAsm
/*
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* include/asm-arm/arch-pnx4008/entry-macro.S
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*
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* Low-level IRQ helper macros for PNX4008-based platforms
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*
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* 2005-2006 (c) MontaVista Software, Inc.
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* Author: Vitaly Wool <vwool@ru.mvista.com>
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include "platform.h"
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#define IO_BASE 0xF0000000
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#define IO_ADDRESS(x) (((((x) & 0xff000000) >> 4) | ((x) & 0xfffff)) | IO_BASE)
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#define INTRC_MASK 0x00
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#define INTRC_RAW_STAT 0x04
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#define INTRC_STAT 0x08
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#define INTRC_POLAR 0x0C
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#define INTRC_ACT_TYPE 0x10
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#define INTRC_TYPE 0x14
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#define SIC1_BASE_INT 32
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#define SIC2_BASE_INT 64
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.macro disable_fiq
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.endm
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.macro get_irqnr_preamble, base, tmp
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.endm
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.macro arch_ret_to_user, tmp1, tmp2
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.endm
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.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
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/* decode the MIC interrupt numbers */
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ldr \base, =IO_ADDRESS(PNX4008_INTCTRLMIC_BASE)
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ldr \irqstat, [\base, #INTRC_STAT]
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cmp \irqstat,#1<<16
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movhs \irqnr,#16
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movlo \irqnr,#0
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movhs \irqstat,\irqstat,lsr#16
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cmp \irqstat,#1<<8
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addhs \irqnr,\irqnr,#8
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movhs \irqstat,\irqstat,lsr#8
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cmp \irqstat,#1<<4
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addhs \irqnr,\irqnr,#4
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movhs \irqstat,\irqstat,lsr#4
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cmp \irqstat,#1<<2
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addhs \irqnr,\irqnr,#2
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movhs \irqstat,\irqstat,lsr#2
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cmp \irqstat,#1<<1
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addhs \irqnr,\irqnr,#1
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/* was there an interrupt ? if not then drop out with EQ status */
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teq \irqstat,#0
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beq 1003f
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/* and now check for extended IRQ reasons */
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cmp \irqnr,#1
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bls 1003f
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cmp \irqnr,#30
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blo 1002f
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/* IRQ 31,30 : High priority cascade IRQ handle */
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/* read the correct SIC */
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/* decoding status after compare : eq is 30 (SIC1) , ne is 31 (SIC2) */
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/* set the base IRQ number */
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ldreq \base, =IO_ADDRESS(PNX4008_INTCTRLSIC1_BASE)
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moveq \irqnr,#SIC1_BASE_INT
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ldrne \base, =IO_ADDRESS(PNX4008_INTCTRLSIC2_BASE)
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movne \irqnr,#SIC2_BASE_INT
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ldr \irqstat, [\base, #INTRC_STAT]
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ldr \tmp, [\base, #INTRC_TYPE]
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/* and with inverted mask : low priority interrupts */
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and \irqstat,\irqstat,\tmp
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b 1004f
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1003:
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/* IRQ 1,0 : Low priority cascade IRQ handle */
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/* read the correct SIC */
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/* decoding status after compare : eq is 1 (SIC2) , ne is 0 (SIC1)*/
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/* read the correct SIC */
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/* set the base IRQ number */
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ldrne \base, =IO_ADDRESS(PNX4008_INTCTRLSIC1_BASE)
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movne \irqnr,#SIC1_BASE_INT
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ldreq \base, =IO_ADDRESS(PNX4008_INTCTRLSIC2_BASE)
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moveq \irqnr,#SIC2_BASE_INT
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ldr \irqstat, [\base, #INTRC_STAT]
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ldr \tmp, [\base, #INTRC_TYPE]
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/* and with inverted mask : low priority interrupts */
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bic \irqstat,\irqstat,\tmp
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1004:
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cmp \irqstat,#1<<16
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addhs \irqnr,\irqnr,#16
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movhs \irqstat,\irqstat,lsr#16
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cmp \irqstat,#1<<8
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addhs \irqnr,\irqnr,#8
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movhs \irqstat,\irqstat,lsr#8
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cmp \irqstat,#1<<4
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addhs \irqnr,\irqnr,#4
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movhs \irqstat,\irqstat,lsr#4
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cmp \irqstat,#1<<2
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addhs \irqnr,\irqnr,#2
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movhs \irqstat,\irqstat,lsr#2
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cmp \irqstat,#1<<1
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addhs \irqnr,\irqnr,#1
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/* is irqstat not zero */
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1002:
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/* we assert that irqstat is not equal to zero and return ne status if true*/
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teq \irqstat,#0
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1003:
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.endm
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.macro irq_prio_table
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.endm
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