arch/m68knommu/platform/5249/config.c

   1 /***************************************************************************/
   2
   3 /*
   4  *      linux/arch/m68knommu/platform/5249/config.c
   5  *
   6  *      Copyright (C) 2002, Greg Ungerer (gerg@snapgear.com)
   7  */
   8
   9 /***************************************************************************/
  10
  11 #include <linux/config.h>
  12 #include <linux/kernel.h>
  13 #include <linux/sched.h>
  14 #include <linux/param.h>
  15 #include <linux/init.h>
  16 #include <asm/irq.h>
  17 #include <asm/dma.h>
  18 #include <asm/traps.h>
  19 #include <asm/machdep.h>
  20 #include <asm/coldfire.h>
  21 #include <asm/mcftimer.h>
  22 #include <asm/mcfsim.h>
  23 #include <asm/mcfdma.h>
  24
  25 /***************************************************************************/
  26
  27 void coldfire_tick(void);
  28 void coldfire_timer_init(irqreturn_t (*handler)(int, void *, struct pt_regs *));
  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         MCF_MBAR + MCFDMA_BASE2,
  42         MCF_MBAR + MCFDMA_BASE3,
  43 };
  44
  45 unsigned int dma_device_address[MAX_M68K_DMA_CHANNELS];
  46
  47 /***************************************************************************/
  48
  49 void mcf_autovector(unsigned int vec)
  50 {
  51         volatile unsigned char  *mbar;
  52
  53         if ((vec >= 25) && (vec <= 31)) {
  54                 mbar = (volatile unsigned char *) MCF_MBAR;
  55                 vec = 0x1 << (vec - 24);
  56                 *(mbar + MCFSIM_AVR) |= vec;
  57                 mcf_setimr(mcf_getimr() & ~vec);
  58         }
  59 }
  60
  61 /***************************************************************************/
  62
  63 void mcf_settimericr(unsigned int timer, unsigned int level)
  64 {
  65         volatile unsigned char *icrp;
  66         unsigned int icr, imr;
  67
  68         if (timer <= 2) {
  69                 switch (timer) {
  70                 case 2:  icr = MCFSIM_TIMER2ICR; imr = MCFSIM_IMR_TIMER2; break;
  71                 default: icr = MCFSIM_TIMER1ICR; imr = MCFSIM_IMR_TIMER1; break;
  72                 }
  73
  74                 icrp = (volatile unsigned char *) (MCF_MBAR + icr);
  75                 *icrp = MCFSIM_ICR_AUTOVEC | (level << 2) | MCFSIM_ICR_PRI3;
  76                 mcf_setimr(mcf_getimr() & ~imr);
  77         }
  78 }
  79
  80 /***************************************************************************/
  81
  82 int mcf_timerirqpending(int timer)
  83 {
  84         unsigned int imr = 0;
  85
  86         switch (timer) {
  87         case 1:  imr = MCFSIM_IMR_TIMER1; break;
  88         case 2:  imr = MCFSIM_IMR_TIMER2; break;
  89         default: break;
  90         }
  91         return (mcf_getipr() & imr);
  92 }
  93
  94 /***************************************************************************/
  95
  96 void config_BSP(char *commandp, int size)
  97 {
  98         mcf_setimr(MCFSIM_IMR_MASKALL);
  99
 100 #if defined(CONFIG_BOOTPARAM)
 101         strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
 102         commandp[size-1] = 0;
 103 #else
 104         memset(commandp, 0, size);
 105 #endif
 106
 107         mach_sched_init = coldfire_timer_init;
 108         mach_tick = coldfire_tick;
 109         mach_gettimeoffset = coldfire_timer_offset;
 110         mach_trap_init = coldfire_trap_init;
 111         mach_reset = coldfire_reset;
 112 }
 113
 114 /***************************************************************************/