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 /*
  * Cirrus EP7312 Intererrupt handler
  */
 
 /*
  * Copyright (c) 2002 by Jay Monkman <jtm@smoothsmoothie.com>
  *
  * Copyright (c) 2002 by Charlie Steader <charlies@poliac.com>
  *
  *  The license and distribution terms for this file may be
  *  found in the file LICENSE in this distribution or at
  *  http://www.rtems.org/license/LICENSE.
 */
 
 #define __asm__
 #include <bsp.h>
 #include <bsp/irq.h>
 
     .extern edb7312_interrupt_dispatch
 
 /*
  * Function to obtain, execute an IT handler and acknowledge the IT
  */
 
     .globl bsp_interrupt_dispatch
 bsp_interrupt_dispatch :
 /*
  * Look at interrupt status register to determine source.
  * From source, determine offset into expanded vector table
  * and load handler address into r0.
  */
 
   ldr   r1, =0x80000000 /* close to interrupt status/mask registers 1 */
   ldr   r2, =0x80001000 /* close to interrupt status/mask registers 2 */
   ldr   r3, =0x80002000 /* close to interrupt status/mask registers 3 */
 
   stmdb   sp!,{r4, r5, r6}
 
 /*
  * INTSR3
  */
 check_dai:
   ldr   r4, [r3, #0x240]
   ldr   r5, [r3, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
   tst   r6, #0x0001
   beq   check_extfiq
   mov   r0, #BSP_DAIINT
   b     get_handler
 
 /*
  * INTSR1
  */
 check_extfiq:
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
   tst   r6, #0x0001
   beq   check_bl
   mov   r0, #BSP_EXTFIQ
   b     get_handler
 
 check_bl:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x0002
   beq   check_we
   mov   r0, #BSP_BLINT
   b     get_handler
 
 check_we:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x0004
   beq   check_mc
   mov   r0, #BSP_WEINT
   b     get_handler
 
 check_mc:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x0008
   beq   check_cs
   mov   r0, #BSP_MCINT
   b     get_handler
 
 check_cs:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x0010
   beq   check_e1
   mov   r0, #BSP_CSINT
   b     get_handler
 
 check_e1:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x0020
   beq   check_e2
   mov   r0, #BSP_EINT1
   b     get_handler
 
 check_e2:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x0040
   beq   check_e3
   mov   r0, #BSP_EINT2
   b     get_handler
 
 check_e3:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x0080
   beq   check_tc1
   mov   r0, #BSP_EINT3
   b     get_handler
 
 check_tc1:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x0100
   beq   check_tc2
   mov   r0, #BSP_TC1OI
   b     get_handler
 
 check_tc2:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x0200
   beq   check_rtc
   mov   r0, #BSP_TC2OI
   b     get_handler
 
 check_rtc:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x0400
   beq   check_tick
   mov   r0, #BSP_RTCMI
   b     get_handler
 
 check_tick:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x0800
   beq   check_utx1
   mov   r0, #BSP_TINT
   b     get_handler
 
 check_utx1:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x1000
   beq   check_urx1
   mov   r0, #BSP_UTXINT1
   b     get_handler
 
 check_urx1:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x2000
   beq   check_ums
   mov   r0, #BSP_URXINT1
   b     get_handler
 
 check_ums:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x4000
   beq   check_sse
   mov   r0, #BSP_UMSINT
   b     get_handler
 
 check_sse:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r1, #0x240]
   ldr   r5, [r1, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x8000
   beq   check_kbd
   mov   r0, #BSP_SSEOTI
   b     get_handler
 
 /*
  * INTSR2
  */
 check_kbd:
   ldr   r4, [r2, #0x240]
   ldr   r5, [r2, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
   tst   r6, #0x0001
   beq   check_ss2rx
   mov   r0, #BSP_KBDINT
   b     get_handler
 
 check_ss2rx:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r2, #0x240]
   ldr   r5, [r2, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x0002
   beq   check_ss2tx
   mov   r0, #BSP_SS2RX
   b     get_handler
 
 check_ss2tx:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r2, #0x240]
   ldr   r5, [r2, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x0004
   beq   check_utx2
   mov   r0, #BSP_SS2TX
   b     get_handler
 
 check_utx2:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r2, #0x240]
   ldr   r5, [r2, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x1000
   beq   check_urx2
   mov   r0, #BSP_UTXINT2
   b     get_handler
 
 check_urx2:
 #if 0
 MUST REMEMBER TO UNCOMMENT IF THIS HANDLER MOVES
   ldr   r4, [r2, #0x240]
   ldr   r5, [r2, #0x280]
   and   r6, r4, r5 /* only look at interrupts which are enabled */
 #endif
   tst   r6, #0x2000
   beq   IRQ_NoInterrupt
   mov   r0, #BSP_URXINT2
   b     get_handler
 
 get_handler:
 
   ldmia   sp!,{r4, r5, r6}
 
   /*
    * re-enable interrupts at processor level as the current
    * interrupt source is now masked via VEGA logic
    */
 /*
   mrs   r1, cpsr
   and   r1, r1, #0xFFFFFF3F
   msr   cpsr, r1
 */
 
   stmdb sp!,{lr}
   bl    edb7312_interrupt_dispatch
   ldmia sp!,{lr}
 
 IRQ_NoInterrupt:
   /* return to the "main" interrupt handler */
   mov pc, lr

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