release/src-rt-6.x/linux/linux-2.6/arch/m68knommu/platform/5206e/config.c

   1 /***************************************************************************/
   2
   3 /*
   4  *      linux/arch/m68knommu/platform/5206e/config.c
   5  *
   6  *      Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
   7  */
   8
   9 /***************************************************************************/
  10
  11 #include <linux/kernel.h>
  12 #include <linux/sched.h>
  13 #include <linux/param.h>
  14 #include <linux/interrupt.h>
  15 #include <asm/irq.h>
  16 #include <asm/dma.h>
  17 #include <asm/traps.h>
  18 #include <asm/machdep.h>
  19 #include <asm/coldfire.h>
  20 #include <asm/mcftimer.h>
  21 #include <asm/mcfsim.h>
  22 #include <asm/mcfdma.h>
  23 #include <asm/irq.h>
  24
  25 /***************************************************************************/
  26
  27 void coldfire_tick(void);
  28 void coldfire_timer_init(irq_handler_t handler);
  29 unsigned long coldfire_timer_offset(void);
  30 void coldfire_trap_init(void);
  31 void coldfire_reset(void);
  32
  33 /***************************************************************************/
  34
  35 /*
  36  *      DMA channel base address table.
  37  */
  38 unsigned int   dma_base_addr[MAX_M68K_DMA_CHANNELS] = {
  39         MCF_MBAR + MCFDMA_BASE0,
  40         MCF_MBAR + MCFDMA_BASE1,
  41 };
  42
  43 unsigned int dma_device_address[MAX_M68K_DMA_CHANNELS];
  44
  45 /***************************************************************************/
  46
  47 void mcf_autovector(unsigned int vec)
  48 {
  49         volatile unsigned char  *mbar;
  50         unsigned char           icr;
  51
  52         if ((vec >= 25) && (vec <= 31)) {
  53                 vec -= 25;
  54                 mbar = (volatile unsigned char *) MCF_MBAR;
  55                 icr = MCFSIM_ICR_AUTOVEC | (vec << 3);
  56                 *(mbar + MCFSIM_ICR1 + vec) = icr;
  57                 vec = 0x1 << (vec + 1);
  58                 mcf_setimr(mcf_getimr() & ~vec);
  59         }
  60 }
  61
  62 /***************************************************************************/
  63
  64 void mcf_settimericr(unsigned int timer, unsigned int level)
  65 {
  66         volatile unsigned char *icrp;
  67         unsigned int icr, imr;
  68
  69         if (timer <= 2) {
  70                 switch (timer) {
  71                 case 2:  icr = MCFSIM_TIMER2ICR; imr = MCFSIM_IMR_TIMER2; break;
  72                 default: icr = MCFSIM_TIMER1ICR; imr = MCFSIM_IMR_TIMER1; break;
  73                 }
  74
  75                 icrp = (volatile unsigned char *) (MCF_MBAR + icr);
  76                 *icrp = MCFSIM_ICR_AUTOVEC | (level << 2) | MCFSIM_ICR_PRI3;
  77                 mcf_setimr(mcf_getimr() & ~imr);
  78         }
  79 }
  80
  81 /***************************************************************************/
  82
  83 int mcf_timerirqpending(int timer)
  84 {
  85         unsigned int imr = 0;
  86
  87         switch (timer) {
  88         case 1:  imr = MCFSIM_IMR_TIMER1; break;
  89         case 2:  imr = MCFSIM_IMR_TIMER2; break;
  90         default: break;
  91         }
  92         return (mcf_getipr() & imr);
  93 }
  94
  95 /***************************************************************************/
  96
  97 void config_BSP(char *commandp, int size)
  98 {
  99         mcf_setimr(MCFSIM_IMR_MASKALL);
 100
 101 #if defined(CONFIG_BOOTPARAM)
 102         strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
 103         commandp[size-1] = 0;
 104 #elif defined(CONFIG_NETtel)
 105         /* Copy command line from FLASH to local buffer... */
 106         memcpy(commandp, (char *) 0xf0004000, size);
 107         commandp[size-1] = 0;
 108 #else
 109         memset(commandp, 0, size);
 110 #endif /* CONFIG_NETtel */
 111
 112         mach_sched_init = coldfire_timer_init;
 113         mach_tick = coldfire_tick;
 114         mach_gettimeoffset = coldfire_timer_offset;
 115         mach_trap_init = coldfire_trap_init;
 116         mach_reset = coldfire_reset;
 117 }
 118
 119 /***************************************************************************/