| // Internal timer |
| // |
| // Copyright (C) 2008-2013 Kevin O'Connor <kevin@koconnor.net> |
| // |
| // This file may be distributed under the terms of the GNU LGPLv3 license. |
| |
| #include "config.h" // CONFIG_* |
| #include "x86.h" // rdtscll() |
| #include "util.h" // timer_setup |
| #include "parisc/pdc.h" |
| |
| #define PAGE0 ((volatile struct zeropage *) 0UL) |
| |
| // Setup internal timers. |
| void |
| timer_setup(void) |
| { |
| } |
| |
| void |
| pmtimer_setup(u16 ioport) |
| { |
| } |
| |
| // Return the number of milliseconds in 'ticks' number of timer irqs. |
| u32 ticks_to_ms(u32 ticks) |
| { |
| return (10 * ticks / PAGE0->mem_10msec); |
| } |
| |
| |
| u32 ticks_from_ms(u32 ms) |
| { |
| return (ms * PAGE0->mem_10msec / 10); |
| } |
| |
| |
| /**************************************************************** |
| * Internal timer reading |
| ****************************************************************/ |
| |
| u32 TimerLast VARLOW; |
| |
| // Sample the current timer value. |
| static u32 |
| timer_read(void) |
| { |
| return rdtscll(); |
| } |
| |
| // Check if the current time is past a previously calculated end time. |
| int |
| timer_check(u32 end) |
| { |
| return (s32)(timer_read() - end) > 0; |
| } |
| |
| static void |
| timer_sleep(u32 diff) |
| { |
| u32 start = timer_read(); |
| u32 end = start + diff; |
| while (!timer_check(end)) |
| /* idle wait */; |
| } |
| |
| void ndelay(u32 count) { |
| timer_sleep((count * PAGE0->mem_10msec / 10) / 1000 / 1000); |
| } |
| void udelay(u32 count) { |
| timer_sleep((count * PAGE0->mem_10msec / 10) / 1000); |
| } |
| void mdelay(u32 count) { |
| timer_sleep((count * PAGE0->mem_10msec / 10)); |
| } |
| |
| void nsleep(u32 count) { |
| ndelay(count); |
| } |
| void usleep(u32 count) { |
| udelay(count); |
| } |
| void msleep(u32 count) { |
| mdelay(count); |
| } |
| |
| // Return the TSC value that is 'msecs' time in the future. |
| u32 |
| timer_calc(u32 msecs) |
| { |
| return (msecs * PAGE0->mem_10msec / 10) + timer_read(); |
| } |
| u32 |
| timer_calc_usec(u32 usecs) |
| { |
| return ((usecs * PAGE0->mem_10msec / 10) / 1000) + timer_read(); |
| } |
| |
| |
| void |
| pit_setup(void) |
| { |
| } |