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Diffstat (limited to 'extras/mini-os/arch/ia64/time.c')
| -rw-r--r-- | extras/mini-os/arch/ia64/time.c | 289 |
1 files changed, 0 insertions, 289 deletions
diff --git a/extras/mini-os/arch/ia64/time.c b/extras/mini-os/arch/ia64/time.c deleted file mode 100644 index 53412660f7..0000000000 --- a/extras/mini-os/arch/ia64/time.c +++ /dev/null @@ -1,289 +0,0 @@ -/* - * Done by Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com> - * Description: simple ia64 specific time handling - * Parts are taken from FreeBSD. - * - **************************************************************************** - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <mini-os/os.h> -#include <mini-os/console.h> -#include <mini-os/time.h> -#include <mini-os/efi.h> -#include <mini-os/events.h> - -struct timespec os_time; -static uint64_t itc_alt; /* itc on last update. */ -static uint64_t itc_at_boot; /* itc on boot */ -static uint64_t itc_frequency; -static uint64_t processor_frequency; -static uint64_t itm_val; - -static int is_leap_year(int year) -{ - if( year % 4 == 0 ) - { - if( year % 100 == 0 ) - { - if( year % 400 == 0 ) return 1; - else return 0; - } - return 1; - } - return 0; -} - -static int count_leap_years(int epoch, int year) -{ - int i, result = 0; - for( i = epoch ; i < year ; i++ ) if( is_leap_year(i) ) result++; - return result; -} - -static int get_day(int year, int mon, int day) { - int result; - switch(mon) - { - case 0: result = 0; break; - case 1: result = 31; break; /* 1: 31 */ - case 2: result = 59; break; /* 2: 31+28 */ - case 3: result = 90; break; /* 3: 59+31 */ - case 4: result = 120;break; /* 4: 90+30 */ - case 5: result = 151;break; /* 5: 120+31 */ - case 6: result = 181;break; /* 6: 151+30 */ - case 7: result = 212;break; /* 7: 181+31 */ - case 8: result = 243;break; /* 8: 212+31 */ - case 9: result = 273;break; /* 9: 243+30 */ - case 10:result = 304;break; /* 10:273+31 */ - case 11:result = 334;break; /* 11:304+30 */ - default: break; - } - if( is_leap_year(year) && mon > 2 ) result++; - result += day - 1; - return result; -} - -/* - * Converts Gregorian date to seconds since 1970-01-01 00:00:00. - * Assumes input in normal date format, i.e. 1980-12-31 23:59:59 - * => year=1980, mon=12, day=31, hour=23, min=59, sec=59. - * - * WARNING: this function will overflow on 2106-02-07 06:28:16 on - * machines were long is 32-bit! (However, as time_t is signed, we - * will already get problems at other places on 2038-01-19 03:14:08) - */ -static unsigned long _mktime(const unsigned int year, const unsigned int mon, - const unsigned int day, const unsigned int hour, - const unsigned int min, const unsigned int sec) -{ - unsigned long result = 0; - - result = sec; - result += min * 60; - result += hour * 3600; - result += get_day(year, mon - 1, day) * 86400; - result += (year - 1970) * 31536000; - result += count_leap_years(1970, year) * 86400; - - return result; -} - -static inline uint64_t -ns_from_cycles(uint64_t cycles) -{ - return (cycles * (1000000000 / itc_frequency)); -} - -static inline uint64_t -ns_to_cycles(uint64_t ns) -{ - return (ns * (itc_frequency / 1000000000)); -} - -/* - * Block the domain until until(nanoseconds) is over. - * If block is called no timerinterrupts are delivered from xen! - */ -void -block_domain(s_time_t until) -{ - struct ia64_pal_result pal_res; - uint64_t c, new; - - c = ns_to_cycles(until); - new = ia64_get_itc() + c - NOW(); - ia64_set_itm(new); /* Reload cr.itm */ - /* - * PAL_HALT_LIGHT returns on every external interrupt, - * including timer interrupts. - */ - pal_res = ia64_call_pal_static(PAL_HALT_LIGHT, 0, 0, 0); - if (pal_res.pal_status != 0) - printk("%s: PAL_HALT_LIGHT returns an error\n"); - /* Reload the normal timer interrupt match. */ - new = ia64_get_itc() + itm_val; - ia64_set_itm(new); -} - -static void -calculate_time(void) -{ - uint64_t itc_new, new; - - itc_new = ia64_get_itc(); - if (itc_new < itc_alt) - new = ~0 - itc_alt + itc_new; - else - new = itc_new - itc_alt; - itc_alt = itc_new; - new = ns_from_cycles(new); - os_time.tv_nsec += new; - if (os_time.tv_nsec > 1000000000) { /* On overflow. */ - os_time.tv_sec++; - os_time.tv_nsec -= 1000000000; - } -} - -void -timer_interrupt(evtchn_port_t port, struct pt_regs* regsP, void *data) -{ - uint64_t new; - - calculate_time(); - new = ia64_get_itc() + itm_val; - ia64_set_itm(new); -} - -/* - * monotonic_clock(): returns # of nanoseconds passed since time_init() - */ -uint64_t -monotonic_clock(void) -{ - uint64_t delta; - - delta = ia64_get_itc() - itc_at_boot; - delta = ns_from_cycles(delta); - return delta; -} - -int -gettimeofday(struct timeval *tv, void *tz) -{ - calculate_time(); - tv->tv_sec = os_time.tv_sec; /* seconds */ - tv->tv_usec = NSEC_TO_USEC(os_time.tv_nsec); /* microseconds */ - return 0; -}; - -/* - * Read the clock frequencies from pal and sal for calculating - * the clock interrupt. - */ -static void -calculate_frequencies(void) -{ - struct ia64_sal_result sal_res; - struct ia64_pal_result pal_res; - - pal_res = ia64_call_pal_static(PAL_FREQ_RATIOS, 0, 0, 0); - sal_res = ia64_sal_entry(SAL_FREQ_BASE, 0, 0, 0, 0, 0, 0, 0); - - if (sal_res.sal_status == 0 && pal_res.pal_status == 0) { - processor_frequency = - sal_res.sal_result[0] * (pal_res.pal_result[0] >> 32) - / (pal_res.pal_result[0] & ((1L << 32) - 1)); - itc_frequency = - sal_res.sal_result[0] * (pal_res.pal_result[2] >> 32) - / (pal_res.pal_result[2] & ((1L << 32) - 1)); - PRINT_BV("Reading clock frequencies:\n"); - PRINT_BV(" Platform clock frequency %ld Hz\n", - sal_res.sal_result[0]); - PRINT_BV(" Processor ratio %ld/%ld, Bus ratio %ld/%ld, " - " ITC ratio %ld/%ld\n", - pal_res.pal_result[0] >> 32, - pal_res.pal_result[0] & ((1L << 32) - 1), - pal_res.pal_result[1] >> 32, - pal_res.pal_result[1] & ((1L << 32) - 1), - pal_res.pal_result[2] >> 32, - pal_res.pal_result[2] & ((1L << 32) - 1)); - - printk(" ITC frequency %ld\n", itc_frequency); - } else { - itc_frequency = 1000000000; - processor_frequency = 0; - printk("Reading clock frequencies failed!!! Using: %ld\n", - itc_frequency); - } -} - - -//#define HZ 1 -#define HZ 1000 // 1000 clock ticks per sec -#define IA64_TIMER_VECTOR 0xef - -void -init_time(void) -{ - uint64_t new; - efi_time_t tm; - evtchn_port_t port = 0; - - printk("Initialising time\n"); - calculate_frequencies(); - - itm_val = (itc_frequency + HZ/2) / HZ; - printk(" itm_val: %ld\n", itm_val); - - os_time.tv_sec = 0; - os_time.tv_nsec = 0; - - if (efi_get_time(&tm)) { - printk(" EFI-Time: %d.%d.%d %d:%d:%d\n", tm.Day, - tm.Month, tm.Year, tm.Hour, tm.Minute, tm.Second); - os_time.tv_sec = _mktime(tm.Year, tm.Month, - tm.Day, tm.Hour, tm.Minute, tm.Second); - os_time.tv_nsec = tm.Nanosecond; - } else - printk("efi_get_time() failed\n"); - - port = bind_virq(VIRQ_ITC, timer_interrupt, NULL); - if (port == -1) { - printk("XEN timer request chn bind failed %i\n", port); - return; - } - unmask_evtchn(port); - itc_alt = ia64_get_itc(); - itc_at_boot = itc_alt; - new = ia64_get_itc() + itm_val; - ia64_set_itv(IA64_TIMER_VECTOR); - ia64_set_itm(new); - ia64_srlz_d(); -} - -void -fini_time(void) -{ - /* TODO */ -} |