arch/m68knommu/platform/5206/config.c

   1 /***************************************************************************/
   2
   3 /*
   4  *      linux/arch/m68knommu/platform/5206/config.c
   5  *
   6  *      Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
   7  *      Copyright (C) 2000-2001, Lineo Inc. (www.lineo.com)
   8  */
   9
  10 /***************************************************************************/
  11
  12 #include <linux/config.h>
  13 #include <linux/kernel.h>
  14 #include <linux/sched.h>
  15 #include <linux/param.h>
  16 #include <linux/init.h>
  17 #include <linux/interrupt.h>
  18 #include <asm/irq.h>
  19 #include <asm/dma.h>
  20 #include <asm/traps.h>
  21 #include <asm/machdep.h>
  22 #include <asm/coldfire.h>
  23 #include <asm/mcftimer.h>
  24 #include <asm/mcfsim.h>
  25 #include <asm/mcfdma.h>
  26
  27 /***************************************************************************/
  28
  29 void coldfire_tick(void);
  30 void coldfire_timer_init(irqreturn_t (*handler)(int, void *, struct pt_regs *));
  31 unsigned long coldfire_timer_offset(void);
  32 void coldfire_trap_init(void);
  33 void coldfire_reset(void);
  34
  35 /***************************************************************************/
  36
  37 /*
  38  *      DMA channel base address table.
  39  */
  40 unsigned int   dma_base_addr[MAX_M68K_DMA_CHANNELS] = {
  41         MCF_MBAR + MCFDMA_BASE0,
  42         MCF_MBAR + MCFDMA_BASE1,
  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         unsigned char           icr;
  53
  54         if ((vec >= 25) && (vec <= 31)) {
  55                 vec -= 25;
  56                 mbar = (volatile unsigned char *) MCF_MBAR;
  57                 icr = MCFSIM_ICR_AUTOVEC | (vec << 3);
  58                 *(mbar + MCFSIM_ICR1 + vec) = icr;
  59                 vec = 0x1 << (vec + 1);
  60                 mcf_setimr(mcf_getimr() & ~vec);
  61         }
  62 }
  63
  64 /***************************************************************************/
  65
  66 void mcf_settimericr(unsigned int timer, unsigned int level)
  67 {
  68         volatile unsigned char *icrp;
  69         unsigned int icr, imr;
  70
  71         if (timer <= 2) {
  72                 switch (timer) {
  73                 case 2:  icr = MCFSIM_TIMER2ICR; imr = MCFSIM_IMR_TIMER2; break;
  74                 default: icr = MCFSIM_TIMER1ICR; imr = MCFSIM_IMR_TIMER1; break;
  75                 }
  76
  77                 icrp = (volatile unsigned char *) (MCF_MBAR + icr);
  78                 *icrp = MCFSIM_ICR_AUTOVEC | (level << 2) | MCFSIM_ICR_PRI3;
  79                 mcf_setimr(mcf_getimr() & ~imr);
  80         }
  81 }
  82
  83 /***************************************************************************/
  84
  85 int mcf_timerirqpending(int timer)
  86 {
  87         unsigned int imr = 0;
  88
  89         switch (timer) {
  90         case 1:  imr = MCFSIM_IMR_TIMER1; break;
  91         case 2:  imr = MCFSIM_IMR_TIMER2; break;
  92         default: break;
  93         }
  94         return (mcf_getipr() & imr);
  95 }
  96
  97 /***************************************************************************/
  98
  99 void config_BSP(char *commandp, int size)
 100 {
 101         mcf_setimr(MCFSIM_IMR_MASKALL);
 102
 103 #if defined(CONFIG_BOOTPARAM)
 104         strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
 105         commandp[size-1] = 0;
 106 #else
 107         memset(commandp, 0, size);
 108 #endif
 109
 110         mach_sched_init = coldfire_timer_init;
 111         mach_tick = coldfire_tick;
 112         mach_gettimeoffset = coldfire_timer_offset;
 113         mach_trap_init = coldfire_trap_init;
 114         mach_reset = coldfire_reset;
 115 }
 116
 117 /***************************************************************************/