release/src-rt-6.x/linux/linux-2.6/arch/m68knommu/platform/5407/config.c

   1 /***************************************************************************/
   2
   3 /*
   4  *      linux/arch/m68knommu/platform/5407/config.c
   5  *
   6  *      Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
   7  *      Copyright (C) 2000, Lineo (www.lineo.com)
   8  */
   9
  10 /***************************************************************************/
  11
  12 #include <linux/kernel.h>
  13 #include <linux/sched.h>
  14 #include <linux/param.h>
  15 #include <linux/init.h>
  16 #include <linux/interrupt.h>
  17 #include <asm/irq.h>
  18 #include <asm/dma.h>
  19 #include <asm/traps.h>
  20 #include <asm/machdep.h>
  21 #include <asm/coldfire.h>
  22 #include <asm/mcftimer.h>
  23 #include <asm/mcfsim.h>
  24 #include <asm/mcfdma.h>
  25
  26 /***************************************************************************/
  27
  28 void coldfire_tick(void);
  29 void coldfire_timer_init(irq_handler_t handler);
  30 unsigned long coldfire_timer_offset(void);
  31 void coldfire_trap_init(void);
  32 void coldfire_reset(void);
  33
  34 extern unsigned int mcf_timervector;
  35 extern unsigned int mcf_profilevector;
  36 extern unsigned int mcf_timerlevel;
  37
  38 /***************************************************************************/
  39
  40 /*
  41  *      DMA channel base address table.
  42  */
  43 unsigned int   dma_base_addr[MAX_M68K_DMA_CHANNELS] = {
  44         MCF_MBAR + MCFDMA_BASE0,
  45         MCF_MBAR + MCFDMA_BASE1,
  46         MCF_MBAR + MCFDMA_BASE2,
  47         MCF_MBAR + MCFDMA_BASE3,
  48 };
  49
  50 unsigned int dma_device_address[MAX_M68K_DMA_CHANNELS];
  51
  52 /***************************************************************************/
  53
  54 void mcf_autovector(unsigned int vec)
  55 {
  56         volatile unsigned char  *mbar;
  57
  58         if ((vec >= 25) && (vec <= 31)) {
  59                 mbar = (volatile unsigned char *) MCF_MBAR;
  60                 vec = 0x1 << (vec - 24);
  61                 *(mbar + MCFSIM_AVR) |= vec;
  62                 mcf_setimr(mcf_getimr() & ~vec);
  63         }
  64 }
  65
  66 /***************************************************************************/
  67
  68 void mcf_settimericr(unsigned int timer, unsigned int level)
  69 {
  70         volatile unsigned char *icrp;
  71         unsigned int icr, imr;
  72
  73         if (timer <= 2) {
  74                 switch (timer) {
  75                 case 2:  icr = MCFSIM_TIMER2ICR; imr = MCFSIM_IMR_TIMER2; break;
  76                 default: icr = MCFSIM_TIMER1ICR; imr = MCFSIM_IMR_TIMER1; break;
  77                 }
  78
  79                 icrp = (volatile unsigned char *) (MCF_MBAR + icr);
  80                 *icrp = MCFSIM_ICR_AUTOVEC | (level << 2) | MCFSIM_ICR_PRI3;
  81                 mcf_setimr(mcf_getimr() & ~imr);
  82         }
  83 }
  84
  85 /***************************************************************************/
  86
  87 int mcf_timerirqpending(int timer)
  88 {
  89         unsigned int imr = 0;
  90
  91         switch (timer) {
  92         case 1:  imr = MCFSIM_IMR_TIMER1; break;
  93         case 2:  imr = MCFSIM_IMR_TIMER2; break;
  94         default: break;
  95         }
  96         return (mcf_getipr() & imr);
  97 }
  98
  99 /***************************************************************************/
 100
 101 void config_BSP(char *commandp, int size)
 102 {
 103         mcf_setimr(MCFSIM_IMR_MASKALL);
 104
 105 #if defined(CONFIG_BOOTPARAM)
 106         strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
 107         commandp[size-1] = 0;
 108 #else
 109         memset(commandp, 0, size);
 110 #endif
 111
 112 #if defined(CONFIG_CLEOPATRA)
 113         /* Different timer setup - to prevent device clash */
 114         mcf_timervector = 30;
 115         mcf_profilevector = 31;
 116         mcf_timerlevel = 6;
 117 #endif
 118
 119         mach_sched_init = coldfire_timer_init;
 120         mach_tick = coldfire_tick;
 121         mach_gettimeoffset = coldfire_timer_offset;
 122         mach_trap_init = coldfire_trap_init;
 123         mach_reset = coldfire_reset;
 124 }
 125
 126 /***************************************************************************/