include/asm-arm/arch-pnx4008/entry-macro.S

   1 /*
   2  * include/asm-arm/arch-pnx4008/entry-macro.S
   3  *
   4  * Low-level IRQ helper macros for PNX4008-based platforms
   5  *
   6  * 2005-2006 (c) MontaVista Software, Inc.
   7  * Author: Vitaly Wool <vwool@ru.mvista.com>
   8  * This file is licensed under  the terms of the GNU General Public
   9  * License version 2. This program is licensed "as is" without any
  10  * warranty of any kind, whether express or implied.
  11  */
  12
  13 #include "platform.h"
  14
  15 #define IO_BASE         0xF0000000
  16 #define IO_ADDRESS(x)  (((((x) & 0xff000000) >> 4) | ((x) & 0xfffff)) | IO_BASE)
  17
  18 #define INTRC_MASK                      0x00
  19 #define INTRC_RAW_STAT                  0x04
  20 #define INTRC_STAT                      0x08
  21 #define INTRC_POLAR                     0x0C
  22 #define INTRC_ACT_TYPE                  0x10
  23 #define INTRC_TYPE                      0x14
  24
  25 #define SIC1_BASE_INT   32
  26 #define SIC2_BASE_INT   64
  27
  28                 .macro  disable_fiq
  29                 .endm
  30
  31                 .macro  get_irqnr_preamble, base, tmp
  32                 .endm
  33
  34                 .macro  arch_ret_to_user, tmp1, tmp2
  35                 .endm
  36
  37                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  38 /* decode the MIC interrupt numbers */
  39                 ldr     \base, =IO_ADDRESS(PNX4008_INTCTRLMIC_BASE)
  40                 ldr     \irqstat, [\base, #INTRC_STAT]
  41
  42                 cmp     \irqstat,#1<<16
  43                 movhs   \irqnr,#16
  44                 movlo   \irqnr,#0
  45                 movhs   \irqstat,\irqstat,lsr#16
  46                 cmp     \irqstat,#1<<8
  47                 addhs   \irqnr,\irqnr,#8
  48                 movhs   \irqstat,\irqstat,lsr#8
  49                 cmp     \irqstat,#1<<4
  50                 addhs   \irqnr,\irqnr,#4
  51                 movhs   \irqstat,\irqstat,lsr#4
  52                 cmp     \irqstat,#1<<2
  53                 addhs   \irqnr,\irqnr,#2
  54                 movhs   \irqstat,\irqstat,lsr#2
  55                 cmp     \irqstat,#1<<1
  56                 addhs   \irqnr,\irqnr,#1
  57
  58 /* was there an interrupt ? if not then drop out with EQ status */
  59                 teq     \irqstat,#0
  60                 beq     1003f
  61
  62 /* and now check for extended IRQ reasons */
  63                 cmp     \irqnr,#1
  64                 bls     1003f
  65                 cmp     \irqnr,#30
  66                 blo     1002f
  67
  68 /* IRQ 31,30  : High priority cascade IRQ handle */
  69 /* read the correct SIC */
  70 /* decoding status after compare : eq is 30 (SIC1) , ne is 31 (SIC2) */
  71 /* set the base IRQ number */
  72                 ldreq   \base, =IO_ADDRESS(PNX4008_INTCTRLSIC1_BASE)
  73                 moveq  \irqnr,#SIC1_BASE_INT
  74                 ldrne   \base, =IO_ADDRESS(PNX4008_INTCTRLSIC2_BASE)
  75                 movne   \irqnr,#SIC2_BASE_INT
  76                 ldr     \irqstat, [\base, #INTRC_STAT]
  77                 ldr     \tmp,     [\base, #INTRC_TYPE]
  78 /* and with inverted mask : low priority interrupts  */
  79                 and     \irqstat,\irqstat,\tmp
  80                 b       1004f
  81
  82 1003:
  83 /* IRQ 1,0  : Low priority cascade IRQ handle */
  84 /* read the correct SIC */
  85 /* decoding status after compare : eq is 1 (SIC2) , ne is 0 (SIC1)*/
  86 /* read the correct SIC */
  87 /* set the base IRQ number  */
  88                 ldrne   \base, =IO_ADDRESS(PNX4008_INTCTRLSIC1_BASE)
  89                 movne   \irqnr,#SIC1_BASE_INT
  90                 ldreq   \base, =IO_ADDRESS(PNX4008_INTCTRLSIC2_BASE)
  91                 moveq   \irqnr,#SIC2_BASE_INT
  92                 ldr     \irqstat, [\base, #INTRC_STAT]
  93                 ldr     \tmp,     [\base, #INTRC_TYPE]
  94 /* and with inverted mask : low priority interrupts  */
  95                 bic     \irqstat,\irqstat,\tmp
  96
  97 1004:
  98
  99                 cmp     \irqstat,#1<<16
 100                 addhs   \irqnr,\irqnr,#16
 101                 movhs   \irqstat,\irqstat,lsr#16
 102                 cmp     \irqstat,#1<<8
 103                 addhs   \irqnr,\irqnr,#8
 104                 movhs   \irqstat,\irqstat,lsr#8
 105                 cmp     \irqstat,#1<<4
 106                 addhs   \irqnr,\irqnr,#4
 107                 movhs   \irqstat,\irqstat,lsr#4
 108                 cmp     \irqstat,#1<<2
 109                 addhs   \irqnr,\irqnr,#2
 110                 movhs   \irqstat,\irqstat,lsr#2
 111                 cmp     \irqstat,#1<<1
 112                 addhs   \irqnr,\irqnr,#1
 113
 114
 115 /* is irqstat not zero */
 116
 117 1002:
 118 /* we assert that irqstat is not equal to zero and return ne status if true*/
 119                 teq     \irqstat,#0
 120 1003:
 121                 .endm
 122
 123
 124                 .macro  irq_prio_table
 125                 .endm
 126
 127