arch/v850/kernel/intv.S

   1 /*
   2  * arch/v850/kernel/intv.S -- Interrupt vectors
   3  *
   4  *  Copyright (C) 2001,02,03  NEC Electronics Corporation
   5  *  Copyright (C) 2001,02,03  Miles Bader <miles@gnu.org>
   6  *
   7  * This file is subject to the terms and conditions of the GNU General
   8  * Public License.  See the file COPYING in the main directory of this
   9  * archive for more details.
  10  *
  11  * Written by Miles Bader <miles@gnu.org>
  12  */
  13
  14 #include <asm/clinkage.h>
  15 #include <asm/irq.h>
  16 #include <asm/machdep.h>
  17 #include <asm/entry.h>
  18
  19 #ifdef CONFIG_V850E_HIGHRES_TIMER
  20 #include <asm/highres_timer.h>
  21 #endif
  22
  23 /* Jump to an interrupt/trap handler.  These handlers (defined in entry.S)
  24    expect the stack-pointer to be saved in ENTRY_SP, so we use sp to do an
  25    indirect jump (which avoids problems when the handler is more than a signed
  26    22-bit offset away).  */
  27 #define JUMP_TO_HANDLER(name, sp_save_loc)                                    \
  28         st.w    sp, sp_save_loc;                                              \
  29         mov     hilo(name), sp;                                               \
  30         jmp     [sp]
  31
  32
  33         /* Reset vector.  */
  34         .section        .intv.reset, "ax"
  35         .org    0x0
  36         mov     hilo(C_SYMBOL_NAME(start)), r1;
  37         jmp     [r1]
  38
  39
  40         /* Generic interrupt vectors.  */
  41         .section        .intv.common, "ax"
  42         .balign 0x10
  43         JUMP_TO_HANDLER (nmi, NMI_ENTRY_SP)     // 0x10 - NMI0
  44         .balign 0x10
  45         JUMP_TO_HANDLER (nmi, NMI_ENTRY_SP)     // 0x20 - NMI1
  46         .balign 0x10
  47         JUMP_TO_HANDLER (nmi, NMI_ENTRY_SP)     // 0x30 - NMI2
  48
  49         .balign 0x10
  50         JUMP_TO_HANDLER (trap, ENTRY_SP)        // 0x40 - TRAP0n
  51         .balign 0x10
  52         JUMP_TO_HANDLER (trap, ENTRY_SP)        // 0x50 - TRAP1n
  53
  54         .balign 0x10
  55         JUMP_TO_HANDLER (dbtrap, ENTRY_SP)      // 0x60 - Illegal op / DBTRAP insn
  56
  57
  58         /* Hardware interrupt vectors.  */
  59         .section        .intv.mach, "ax"
  60         .org    0x0
  61
  62 #if defined (CONFIG_V850E_HIGHRES_TIMER) && defined (IRQ_INTCMD)
  63
  64         /* Interrupts before the highres timer interrupt.  */
  65         .rept   IRQ_INTCMD (HIGHRES_TIMER_TIMER_D_UNIT)
  66         .balign 0x10
  67         JUMP_TO_HANDLER (irq, ENTRY_SP)
  68         .endr
  69
  70         /* The highres timer interrupt.  */
  71         .balign 0x10
  72         JUMP_TO_HANDLER (C_SYMBOL_NAME (highres_timer_slow_tick_irq), ENTRY_SP)
  73
  74         /* Interrupts after the highres timer interrupt.  */
  75         .rept   NUM_CPU_IRQS - IRQ_INTCMD (HIGHRES_TIMER_TIMER_D_UNIT) - 1
  76         .balign 0x10
  77         JUMP_TO_HANDLER (irq, ENTRY_SP)
  78         .endr
  79
  80 #else /* No highres timer */
  81
  82         .rept   NUM_CPU_IRQS
  83         .balign 0x10
  84         JUMP_TO_HANDLER (irq, ENTRY_SP)
  85         .endr
  86
  87 #endif /* Highres timer */