diff options
Diffstat (limited to 'c/src/lib/libcpu/sh/sh7032/clock/ckinit.c')
| -rw-r--r-- | c/src/lib/libcpu/sh/sh7032/clock/ckinit.c | 48 |
1 files changed, 24 insertions, 24 deletions
diff --git a/c/src/lib/libcpu/sh/sh7032/clock/ckinit.c b/c/src/lib/libcpu/sh/sh7032/clock/ckinit.c index 5548e3a8ef..96abdd3f46 100644 --- a/c/src/lib/libcpu/sh/sh7032/clock/ckinit.c +++ b/c/src/lib/libcpu/sh/sh7032/clock/ckinit.c @@ -9,7 +9,7 @@ * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. - * + * * * COPYRIGHT (c) 1998. * On-Line Applications Research Corporation (OAR). @@ -40,11 +40,11 @@ #define I_CLK_PHI_4 2 #define I_CLK_PHI_8 3 -/* +/* * Set I_CLK_PHI to one of the I_CLK_PHI_X values from above to choose * a PHI/X clock rate. */ - + #define I_CLK_PHI I_CLK_PHI_4 #define CLOCK_SCALE (1<<I_CLK_PHI) @@ -62,12 +62,12 @@ * clicks_per_tick := clicks_per_sec * usec_per_tick * * This is a very expensive function ;-) - * + * * Below are two variants: * 1. A variant applying integer arithmetics, only. * 2. A variant applying floating point arithmetics * - * The floating point variant pulls in the fmath routines when linking, + * The floating point variant pulls in the fmath routines when linking, * resulting in slightly larger executables for applications that do not * apply fmath otherwise. However, the imath variant is significantly slower * than the fmath variant and more complex. @@ -78,13 +78,13 @@ * To the sake of simplicity, we might abandon one of both variants in * future. */ -static unsigned int sh_clicks_per_tick( +static unsigned int sh_clicks_per_tick( unsigned int clicks_per_sec, unsigned int usec_per_tick ) { #if 1 unsigned int clicks_per_tick = 0 ; - + unsigned int b = clicks_per_sec ; unsigned int c = 1000000 ; unsigned int d = 1 ; @@ -98,10 +98,10 @@ static unsigned int sh_clicks_per_tick( d *= 10 ; a = ( ( b / c ) * usec_per_tick ) / d ; clicks_per_tick += a ; - } + } return clicks_per_tick ; #else - double fclicks_per_tick = + double fclicks_per_tick = ((double) clicks_per_sec * (double) usec_per_tick) / 1000000.0 ; return (uint32_t) fclicks_per_tick ; #endif @@ -138,7 +138,7 @@ static uint32_t Clock_isrs_const; /* only calculated once */ /* * These are set by clock driver during its init */ - + rtems_device_major_number rtems_clock_major = ~0; rtems_device_minor_number rtems_clock_minor; @@ -198,26 +198,26 @@ void Install_clock( uint32_t microseconds_per_tick ; uint32_t cclicks_per_tick ; uint16_t Clock_limit ; - + /* * Initialize the clock tick device driver variables */ Clock_driver_ticks = 0; - + if ( rtems_configuration_get_microseconds_per_tick() != 0 ) microseconds_per_tick = rtems_configuration_get_microseconds_per_tick() ; else microseconds_per_tick = 10000 ; /* 10000 us */ /* clock clicks per tick */ - cclicks_per_tick = + cclicks_per_tick = sh_clicks_per_tick( rtems_cpu_configuration_get_clicks_per_second() / CLOCK_SCALE, microseconds_per_tick ); Clock_isrs_const = cclicks_per_tick >> 16 ; - if ( ( cclicks_per_tick | 0xffff ) > 0 ) + if ( ( cclicks_per_tick | 0xffff ) > 0 ) Clock_isrs_const++ ; Clock_limit = cclicks_per_tick / Clock_isrs_const ; Clock_isrs = Clock_isrs_const; @@ -226,7 +226,7 @@ void Install_clock( /* * Hardware specific initialize goes here */ - + /* stop Timer 0 */ temp8 = read8( ITU_TSTR) & ITU0_STARTMASK; write8( temp8, ITU_TSTR); @@ -246,8 +246,8 @@ void Install_clock( write8( ITU0_TCRMASK , ITU_TCR0); /* use GRA without I/O - pins */ - write8( ITU0_TIORVAL, ITU_TIOR0); - + write8( ITU0_TIORVAL, ITU_TIOR0); + /* reset flags of the status register */ temp8 = read8( ITU_TSR0) & ITU_STAT_MASK; write8( temp8, ITU_TSR0); @@ -262,7 +262,7 @@ void Install_clock( /* set counter limits */ write16( Clock_limit, ITU_GRA0); - + /* start counter */ temp8 = read8( ITU_TSTR) |~ITU0_STARTMASK; write8( temp8, ITU_TSTR); @@ -312,14 +312,14 @@ rtems_device_driver Clock_initialize( ) { Install_clock( Clock_isr ); - + /* * make major/minor avail to others such as shared memory driver */ - + rtems_clock_major = major; rtems_clock_minor = minor; - + return RTEMS_SUCCESSFUL; } @@ -331,14 +331,14 @@ rtems_device_driver Clock_control( { uint32_t isrlevel; rtems_libio_ioctl_args_t *args = pargp; - + if (args != 0) { /* * This is hokey, but until we get a defined interface * to do this, it will just be this simple... */ - + if (args->command == rtems_build_name('I', 'S', 'R', ' ')) { Clock_isr(CLOCK_VECTOR); @@ -348,7 +348,7 @@ rtems_device_driver Clock_control( rtems_isr_entry ignored ; rtems_interrupt_disable( isrlevel ); rtems_interrupt_catch( args->buffer, CLOCK_VECTOR, &ignored ); - + rtems_interrupt_enable( isrlevel ); } } |