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Added get_cpu_freq function to read out the CPU frequency.

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This commit is contained in:
afpr
2013-10-04 09:43:49 +01:00
parent 08a7e55887
commit f417cc8f99
4 changed files with 47 additions and 12 deletions
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20
c/src/lib/libbsp/patmos/pasim/clock/ckinit.c
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@@ -88,12 +88,24 @@ u64 get_cpu_time(void)
return (((u64)u) << 32) | l;
}
uint32_t get_cpu_freq(void)
{
uint32_t freq;
__PATMOS_CPU_RD_FREQ(freq);
return freq;
}
uint32_t get_cpu_freq_mhz(void)
{
return get_cpu_freq()/1000000U;
}
/*
uint32_t bsp_clock_nanoseconds_since_last_tick(void)
{
uint32_t usecs;
usecs = get_cpu_cycles()/__PATMOS_FREQ_MHZ - Clock_driver_ticks*rtems_configuration_get_microseconds_per_tick() - usecs_offset;
usecs = get_cpu_cycles()/get_cpu_freq_mhz() - Clock_driver_ticks*rtems_configuration_get_microseconds_per_tick() - usecs_offset;
return usecs * 1000;
}
@@ -214,7 +226,7 @@ rtems_isr Clock_isr(
*/
Clock_driver_ticks += 1;
__PATMOS_RTC_WR_INTERVAL(rtems_configuration_get_microseconds_per_tick() * __PATMOS_FREQ_MHZ);
__PATMOS_RTC_WR_INTERVAL(rtems_configuration_get_microseconds_per_tick() * get_cpu_freq_mhz());
rtems_clock_tick();
@@ -330,12 +342,12 @@ void Install_clock(
);
#endif
__PATMOS_RTC_WR_INTERVAL(rtems_configuration_get_microseconds_per_tick() * __PATMOS_FREQ_MHZ);
__PATMOS_RTC_WR_INTERVAL(rtems_configuration_get_microseconds_per_tick() * get_cpu_freq_mhz());
/*
* reset the cpu_cycles count to determine clock_nanoseconds_since_last_tick
*/
//usecs_offset = get_cpu_cycles()/__PATMOS_FREQ_MHZ;
//usecs_offset = get_cpu_cycles()/get_cpu_freq_mhz();
/*
* Schedule the clock cleanup routine to execute if the application exits.

35
c/src/lib/libbsp/patmos/pasim/include/pasim.h
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@@ -94,12 +94,6 @@ extern void set_cpu_cycles (u64 time_warp);
extern u64 get_cpu_cycles(void);
extern u64 get_cpu_time(void);
extern char __cycles_per_sec; /* linker symbol giving the CPU frequency */
#define __PATMOS_CPU_FREQ (int)(&__cycles_per_sec) /* CPU frequency in Hz */
#define __PATMOS_FREQ_MHZ __PATMOS_CPU_FREQ/1000000U
#define __PATMOS_INF 0xFFFFFFFF /* maximum cycles the clock can run without interrupts */
/* Address to access the cycle counter low register of the RTC */
#define __PATMOS_RTC_CYCLE_LOW_ADDR (&_timer_base + 0x00)
@@ -149,6 +143,35 @@ extern char __cycles_per_sec; /* linker symbol giving the CPU frequency */
* End of RTC Management
*/
/*
* CPU Info Management
*/
extern char _cpuinfo_base; /* linker symbol giving the address of the CPU info */
extern uint32_t get_cpu_freq(void);
extern uint32_t get_cpu_freq_mhz(void);
#define __PATMOS_INF 0xFFFFFFFF /* maximum cycles the clock can run without interrupts */
/* Address to access the CPU id */
#define __PATMOS_CPU_ID_ADDR (&_cpuinfo_base + 0x00)
/* Address to access the CPU frequency */
#define __PATMOS_CPU_FREQ_ADDR (&_cpuinfo_base + 0x04)
/* Macro to read the CPU id */
#define __PATMOS_CPU_RD_ID(res) res = *((_iodev_ptr_t)__PATMOS_CPU_ID_ADDR);
/* Macro to read the CPU frequency */
#define __PATMOS_CPU_RD_FREQ(res) res = *((_iodev_ptr_t)__PATMOS_CPU_FREQ_ADDR);
/*
* End of CPU Info Management
*/
#endif /* !ASM */
#ifdef __cplusplus

2
c/src/lib/libbsp/patmos/pasim/make/custom/pasim.cfg
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@@ -16,4 +16,4 @@ CPU_CFLAGS = -msoft-float
# optimize flag: typically -O2
CFLAGS_OPTIMIZE_V = -O2 -g -Xllc -trap-func=abort_trap
LINK_LIBS += $(PROJECT_RELEASE)/lib/start.o $(PROJECT_RELEASE)/lib/libsyms.ll -l=c -l=rtemscpu -l=rtemsbsp -nostartfiles -Xgold -Map -Xgold map.map -Xgold --script=$(PROJECT_RELEASE)/lib/linkcmds -Xgold --defsym -Xgold __cycles_per_sec=5000000 -Xopt -disable-internalize
LINK_LIBS += $(PROJECT_RELEASE)/lib/start.o $(PROJECT_RELEASE)/lib/libsyms.ll -l=c -l=rtemscpu -l=rtemsbsp -nostartfiles -Xgold -Map -Xgold map.map -Xgold --script=$(PROJECT_RELEASE)/lib/linkcmds -Xopt -disable-internalize

2
c/src/lib/libbsp/patmos/pasim/timer/timer.c
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@@ -42,7 +42,7 @@ int benchmark_timer_read(void)
__PATMOS_RTC_RD_INTERVAL(total);
total = (__PATMOS_INF - total)/__PATMOS_FREQ_MHZ;
total = (__PATMOS_INF - total)/get_cpu_freq_mhz();
if ( benchmark_timer_find_average_overhead == true )
return total; /* in one microsecond units */