arch/arm/plat-omap/include/mach/entry-macro.S

   1 /*
   2  * include/asm-arm/arch-omap/entry-macro.S
   3  *
   4  * Low-level IRQ helper macros for OMAP-based platforms
   5  *
   6  * This file is licensed under  the terms of the GNU General Public
   7  * License version 2. This program is licensed "as is" without any
   8  * warranty of any kind, whether express or implied.
   9  */
  10 #include <mach/hardware.h>
  11 #include <mach/io.h>
  12 #include <mach/irqs.h>
  13
  14 #if defined(CONFIG_ARCH_OMAP1)
  15
  16 #if defined(CONFIG_ARCH_OMAP730) && \
  17         (defined(CONFIG_ARCH_OMAP15XX) || defined(CONFIG_ARCH_OMAP16XX))
  18 #error "FIXME: OMAP730 doesn't support multiple-OMAP"
  19 #elif defined(CONFIG_ARCH_OMAP730)
  20 #define INT_IH2_IRQ             INT_730_IH2_IRQ
  21 #elif defined(CONFIG_ARCH_OMAP15XX)
  22 #define INT_IH2_IRQ             INT_1510_IH2_IRQ
  23 #elif defined(CONFIG_ARCH_OMAP16XX)
  24 #define INT_IH2_IRQ             INT_1610_IH2_IRQ
  25 #else
  26 #warning "IH2 IRQ defaulted"
  27 #define INT_IH2_IRQ             INT_1510_IH2_IRQ
  28 #endif
  29
  30                 .macro  disable_fiq
  31                 .endm
  32
  33                 .macro  get_irqnr_preamble, base, tmp
  34                 .endm
  35
  36                 .macro  arch_ret_to_user, tmp1, tmp2
  37                 .endm
  38
  39                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  40                 ldr     \base, =IO_ADDRESS(OMAP_IH1_BASE)
  41                 ldr     \irqnr, [\base, #IRQ_ITR_REG_OFFSET]
  42                 ldr     \tmp, [\base, #IRQ_MIR_REG_OFFSET]
  43                 mov     \irqstat, #0xffffffff
  44                 bic     \tmp, \irqstat, \tmp
  45                 tst     \irqnr, \tmp
  46                 beq     1510f
  47
  48                 ldr     \irqnr, [\base, #IRQ_SIR_FIQ_REG_OFFSET]
  49                 cmp     \irqnr, #0
  50                 ldreq   \irqnr, [\base, #IRQ_SIR_IRQ_REG_OFFSET]
  51                 cmpeq   \irqnr, #INT_IH2_IRQ
  52                 ldreq   \base, =IO_ADDRESS(OMAP_IH2_BASE)
  53                 ldreq   \irqnr, [\base, #IRQ_SIR_IRQ_REG_OFFSET]
  54                 addeqs  \irqnr, \irqnr, #32
  55 1510:
  56                 .endm
  57
  58 #endif
  59 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
  60
  61 #if defined(CONFIG_ARCH_OMAP24XX)
  62 #include <mach/omap24xx.h>
  63 #endif
  64 #if defined(CONFIG_ARCH_OMAP34XX)
  65 #include <mach/omap34xx.h>
  66 #endif
  67
  68 #define INTCPS_SIR_IRQ_OFFSET   0x0040          /* Active interrupt number */
  69
  70                 .macro  disable_fiq
  71                 .endm
  72
  73                 .macro  get_irqnr_preamble, base, tmp
  74                 .endm
  75
  76                 .macro  arch_ret_to_user, tmp1, tmp2
  77                 .endm
  78
  79                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  80                 ldr     \base, =OMAP2_VA_IC_BASE
  81                 ldr     \irqnr, [\base, #0x98] /* IRQ pending reg 1 */
  82                 cmp     \irqnr, #0x0
  83                 bne     2222f
  84                 ldr     \irqnr, [\base, #0xb8] /* IRQ pending reg 2 */
  85                 cmp     \irqnr, #0x0
  86                 bne     2222f
  87                 ldr     \irqnr, [\base, #0xd8] /* IRQ pending reg 3 */
  88                 cmp     \irqnr, #0x0
  89 2222:
  90 #if defined(CONFIG_ARCH_OMAP34XX)
  91                 mov     \tmp, \irqnr
  92 #endif
  93                 ldrne   \irqnr, [\base, #INTCPS_SIR_IRQ_OFFSET]
  94 #if defined(CONFIG_ARCH_OMAP34XX)
  95                 mov     \irqstat, \irqnr
  96                 bic     \irqstat, \irqstat, #0x7f /* check for spurious flag */
  97                 cmp     \irqstat, #0x0
  98                 beq     2223f
  99                 mov     \irqstat, #0x1 /* Ack the spurious irq, this lets it
 100                                         * generate a bad irq error message,
 101                                         * but prevents infinitely repeating
 102                                         * irq.
 103                                         */
 104                 str     \irqstat, [\base, #0x48] /* INTC_CONTROL register */
 105 2223:
 106                 cmp     \tmp, #0x0 /* set conditional back to what it was
 107                                     * before spurious test
 108                                     */
 109 #endif
 110
 111                 .endm
 112
 113                 .macro  irq_prio_table
 114                 .endm
 115
 116 #endif