diff options
Diffstat (limited to 'c/src/lib/libbsp/sparc/leon3/clock/ckinit.c')
| -rw-r--r-- | c/src/lib/libbsp/sparc/leon3/clock/ckinit.c | 307 |
1 files changed, 61 insertions, 246 deletions
diff --git a/c/src/lib/libbsp/sparc/leon3/clock/ckinit.c b/c/src/lib/libbsp/sparc/leon3/clock/ckinit.c index 6e439c6868..4b0ce519e6 100644 --- a/c/src/lib/libbsp/sparc/leon3/clock/ckinit.c +++ b/c/src/lib/libbsp/sparc/leon3/clock/ckinit.c @@ -6,7 +6,7 @@ * The tick frequency is directly programmed to the configured number of * microseconds per tick. * - * COPYRIGHT (c) 1989-1998. + * COPYRIGHT (c) 1989-2006. * On-Line Applications Research Corporation (OAR). * * Modified for LEON3 BSP. @@ -17,14 +17,15 @@ * found in the file LICENSE in this distribution or at * http://www.rtems.com/license/LICENSE. * - * * $Id$ */ -#include <stdlib.h> - #include <bsp.h> -#include <rtems/libio.h> +#include <bspopts.h> + +#if SIMSPARC_FAST_IDLE==1 +#define CLOCK_DRIVER_USE_FAST_IDLE +#endif /* * The Real Time Clock Counter Timer uses this trap type. @@ -32,248 +33,62 @@ extern rtems_configuration_table Configuration; -#define LEON3_CLOCK_INDEX (Configuration.User_multiprocessing_table ? LEON3_Cpu_Index : 0) - -#define CLOCK_VECTOR LEON_TRAP_TYPE( LEON_INTERRUPT_TIMER1 ) +#define LEON3_CLOCK_INDEX \ + (Configuration.User_multiprocessing_table ? LEON3_Cpu_Index : 0) -/* - * Clock ticks since initialization - */ - -volatile rtems_unsigned32 Clock_driver_ticks; volatile LEON3_Timer_Regs_Map *LEON3_Timer_Regs = 0; static int clkirq; -/* - * This is the value programmed into the count down timer. It - * is artificially lowered when SIMSPARC_FAST_IDLE is defined to - * cut down how long we spend in the idle task while executing on - * the simulator. - */ - -extern rtems_unsigned32 CPU_SPARC_CLICKS_PER_TICK; - -rtems_isr_entry Old_ticker; - -void Clock_exit( void ); - -/* - * These are set by clock driver during its init - */ - -rtems_device_major_number rtems_clock_major = ~0; -rtems_device_minor_number rtems_clock_minor; - -/* - * Clock_isr - * - * This is the clock tick interrupt handler. - * - * Input parameters: - * vector - vector number - * - * Output parameters: NONE - * - * Return values: NONE - * - */ - -rtems_isr Clock_isr( - rtems_vector_number vector -) -{ - /* - * If we are in "fast idle" mode, then the value for clicks per tick - * is lowered to decrease the amount of time spent executing the idle - * task while using the SPARC Instruction Simulator. - */ - -#if SIMSPARC_FAST_IDLE - LEON_REG.Real_Time_Clock_Counter = CPU_SPARC_CLICKS_PER_TICK; - LEON_REG_Set_Real_Time_Clock_Timer_Control( - LEON_REG_TIMER_COUNTER_ENABLE_COUNTING | - LEON_REG_TIMER_COUNTER_LOAD_COUNTER - ); -#endif - - /* - * The driver has seen another tick. - */ - - Clock_driver_ticks += 1; - - /* - * Real Time Clock counter/timer is set to automatically reload. - */ - - rtems_clock_tick(); -} - -/* - * Install_clock - * - * This routine actually performs the hardware initialization for the clock. - * - * Input parameters: - * clock_isr - clock interrupt service routine entry point - * - * Output parameters: NONE - * - * Return values: NONE - * - */ - -void Install_clock( - rtems_isr_entry clock_isr -) -{ - int i; - unsigned int iobar, conf; - - Clock_driver_ticks = 0; - - /* Find GP Timer */ - - i = 0; - while (i < amba_conf.apbslv.devnr) - { - conf = amba_get_confword(amba_conf.apbslv, i, 0); - if ((amba_vendor(conf) == VENDOR_GAISLER) && (amba_device(conf) == GAISLER_GPTIMER)) - { - iobar = amba_apb_get_membar(amba_conf.apbslv, i); - LEON3_Timer_Regs = (volatile LEON3_Timer_Regs_Map *) amba_iobar_start(amba_conf.apbmst, iobar); - break; - } - i++; - } - - clkirq = (LEON3_Timer_Regs->status & 0xfc) >> 3; - - /* MP */ - if (Configuration.User_multiprocessing_table != NULL) - { - clkirq += LEON3_Cpu_Index; - } - - if ( BSP_Configuration.ticks_per_timeslice ) { - Old_ticker = (rtems_isr_entry) set_vector( clock_isr, LEON_TRAP_TYPE(clkirq), 1 ); - - LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].reload = CPU_SPARC_CLICKS_PER_TICK - 1; - - LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].conf = LEON3_GPTIMER_EN | LEON3_GPTIMER_RL | LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN; - - atexit( Clock_exit ); - } - -} - -/* - * Clock_exit - * - * This routine allows the clock driver to exit by masking the interrupt and - * disabling the clock's counter. - * - * Input parameters: NONE - * - * Output parameters: NONE - * - * Return values: NONE - * - */ - -void Clock_exit( void ) -{ - if ( BSP_Configuration.ticks_per_timeslice ) { - LEON_Mask_interrupt(LEON_TRAP_TYPE(clkirq)); - - LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].conf = 0; - - /* do not restore old vector */ - } -} - -/* - * Clock_initialize - * - * This routine initializes the clock driver. - * - * Input parameters: - * major - clock device major number - * minor - clock device minor number - * parg - pointer to optional device driver arguments - * - * Output parameters: NONE - * - * Return values: - * rtems_device_driver status code - */ - -rtems_device_driver Clock_initialize( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *pargp -) -{ - 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; -} - -/* - * Clock_control - * - * This routine is the clock device driver control entry point. - * - * Input parameters: - * major - clock device major number - * minor - clock device minor number - * parg - pointer to optional device driver arguments - * - * Output parameters: NONE - * - * Return values: - * rtems_device_driver status code - */ - - - -rtems_device_driver Clock_control( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *pargp -) -{ - rtems_unsigned32 isrlevel; - rtems_libio_ioctl_args_t *args = pargp; - - - if (args == 0) - goto done; - - /* - * 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(LEON_TRAP_TYPE(clkirq)); - } - else if (args->command == rtems_build_name('N', 'E', 'W', ' ')) - { - rtems_interrupt_disable( isrlevel ); - (void) set_vector( args->buffer, LEON_TRAP_TYPE(clkirq), 1 ); - rtems_interrupt_enable( isrlevel ); - } - -done: - return RTEMS_SUCCESSFUL; -} +#define CLOCK_VECTOR LEON_TRAP_TYPE( clkirq ) + +#define Clock_driver_support_at_tick() + +#define Clock_driver_support_find_timer() \ + do { \ + int i; \ + unsigned int iobar, conf; \ + \ + /* Find GP Timer */ \ + i = 0; \ + while (i < amba_conf.apbslv.devnr) { \ + conf = amba_get_confword(amba_conf.apbslv, i, 0); \ + if ((amba_vendor(conf) == VENDOR_GAISLER) && \ + (amba_device(conf) == GAISLER_GPTIMER)) { \ + iobar = amba_apb_get_membar(amba_conf.apbslv, i); \ + LEON3_Timer_Regs = (volatile LEON3_Timer_Regs_Map *) \ + amba_iobar_start(amba_conf.apbmst, iobar); \ + break; \ + } \ + i++; \ + } \ + \ + clkirq = (LEON3_Timer_Regs->status & 0xfc) >> 3; \ + \ + /* MP */ \ + if (Configuration.User_multiprocessing_table != NULL) { \ + clkirq += LEON3_Cpu_Index; \ + } \ + } while (0) + +#define Clock_driver_support_install_isr( _new, _old ) \ + do { \ + _old = set_vector( _new, CLOCK_VECTOR, 1 ); \ + } while(0) + +#define Clock_driver_support_initialize_hardware() \ + do { \ + LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].reload = \ + BSP_Configuration.microseconds_per_tick - 1; \ + \ + LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].conf = \ + LEON3_GPTIMER_EN | LEON3_GPTIMER_RL | \ + LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN; \ + } while (0) + +#define Clock_driver_support_shutdown_hardware() \ + do { \ + LEON_Mask_interrupt(LEON_TRAP_TYPE(clkirq)); \ + LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].conf = 0; \ + } while (0) + +#include "../../../shared/clockdrv_shell.c" |