LXR linux/arch/arm/mach-iop13xx/include/mach/time.h

   1#ifndef _IOP13XX_TIME_H_
   2#define _IOP13XX_TIME_H_
   3#define IRQ_IOP_TIMER0 IRQ_IOP13XX_TIMER0
   4
   5#define IOP_TMR_EN          0x02
   6#define IOP_TMR_RELOAD      0x04
   7#define IOP_TMR_PRIVILEGED 0x08
   8#define IOP_TMR_RATIO_1_1  0x00
   9
  10#define IOP13XX_XSI_FREQ_RATIO_MASK     (3 << 19)
  11#define IOP13XX_XSI_FREQ_RATIO_2        (0 << 19)
  12#define IOP13XX_XSI_FREQ_RATIO_3        (1 << 19)
  13#define IOP13XX_XSI_FREQ_RATIO_4        (2 << 19)
  14#define IOP13XX_CORE_FREQ_MASK          (7 << 16)
  15#define IOP13XX_CORE_FREQ_600           (0 << 16)
  16#define IOP13XX_CORE_FREQ_667           (1 << 16)
  17#define IOP13XX_CORE_FREQ_800           (2 << 16)
  18#define IOP13XX_CORE_FREQ_933           (3 << 16)
  19#define IOP13XX_CORE_FREQ_1000          (4 << 16)
  20#define IOP13XX_CORE_FREQ_1200          (5 << 16)
  21
  22void iop_init_time(unsigned long tickrate);
  23unsigned long iop_gettimeoffset(void);
  24
  25static inline unsigned long iop13xx_core_freq(void)
  26{
  27        unsigned long freq = __raw_readl(IOP13XX_PROCESSOR_FREQ);
  28        freq &= IOP13XX_CORE_FREQ_MASK;
  29        switch (freq) {
  30        case IOP13XX_CORE_FREQ_600:
  31                return 600000000;
  32        case IOP13XX_CORE_FREQ_667:
  33                return 667000000;
  34        case IOP13XX_CORE_FREQ_800:
  35                return 800000000;
  36        case IOP13XX_CORE_FREQ_933:
  37                return 933000000;
  38        case IOP13XX_CORE_FREQ_1000:
  39                return 1000000000;
  40        case IOP13XX_CORE_FREQ_1200:
  41                return 1200000000;
  42        default:
  43                printk("%s: warning unknown frequency, defaulting to 800Mhz\n",
  44                        __func__);
  45        }
  46
  47        return 800000000;
  48}
  49
  50static inline unsigned long iop13xx_xsi_bus_ratio(void)
  51{
  52        unsigned long  ratio = __raw_readl(IOP13XX_PROCESSOR_FREQ);
  53        ratio &= IOP13XX_XSI_FREQ_RATIO_MASK;
  54        switch (ratio) {
  55        case IOP13XX_XSI_FREQ_RATIO_2:
  56                return 2;
  57        case IOP13XX_XSI_FREQ_RATIO_3:
  58                return 3;
  59        case IOP13XX_XSI_FREQ_RATIO_4:
  60                return 4;
  61        default:
  62                printk("%s: warning unknown ratio, defaulting to 2\n",
  63                        __func__);
  64        }
  65
  66        return 2;
  67}
  68
  69static inline void write_tmr0(u32 val)
  70{
  71        asm volatile("mcr p6, 0, %0, c0, c9, 0" : : "r" (val));
  72}
  73
  74static inline void write_tmr1(u32 val)
  75{
  76        asm volatile("mcr p6, 0, %0, c1, c9, 0" : : "r" (val));
  77}
  78
  79static inline u32 read_tcr0(void)
  80{
  81        u32 val;
  82        asm volatile("mrc p6, 0, %0, c2, c9, 0" : "=r" (val));
  83        return val;
  84}
  85
  86static inline u32 read_tcr1(void)
  87{
  88        u32 val;
  89        asm volatile("mrc p6, 0, %0, c3, c9, 0" : "=r" (val));
  90        return val;
  91}
  92
  93static inline void write_trr0(u32 val)
  94{
  95        asm volatile("mcr p6, 0, %0, c4, c9, 0" : : "r" (val));
  96}
  97
  98static inline void write_trr1(u32 val)
  99{
 100        asm volatile("mcr p6, 0, %0, c5, c9, 0" : : "r" (val));
 101}
 102
 103static inline void write_tisr(u32 val)
 104{
 105        asm volatile("mcr p6, 0, %0, c6, c9, 0" : : "r" (val));
 106}
 107#endif
 108