remove the v850 port

[~andy/linux] / arch / v850 / kernel / highres_timer.c

diff --git a/arch/v850/kernel/highres_timer.c b/arch/v850/kernel/highres_timer.c
deleted file mode 100644 (file)
index b16ad1e..0000000
--- a/arch/v850/kernel/highres_timer.c
+++ /dev/null
@@ -1,132 +0,0 @@
-/*
- * arch/v850/kernel/highres_timer.c -- High resolution timing routines
- *
- *  Copyright (C) 2001,02,03  NEC Electronics Corporation
- *  Copyright (C) 2001,02,03  Miles Bader <miles@gnu.org>
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License.  See the file COPYING in the main directory of this
- * archive for more details.
- *
- * Written by Miles Bader <miles@gnu.org>
- */
-
-#include <asm/system.h>
-#include <asm/v850e_timer_d.h>
-#include <asm/highres_timer.h>
-
-#define HIGHRES_TIMER_USEC_SHIFT   12
-
-/* Pre-calculated constant used for converting ticks to real time
-   units.  We initialize it to prevent it being put into BSS.  */
-static u32 highres_timer_usec_prescale = 1;
-
-void highres_timer_slow_tick_irq (void) __attribute__ ((noreturn));
-void highres_timer_slow_tick_irq (void)
-{
-       /* This is an interrupt handler, so it must be very careful to
-          not to trash any registers.  At this point, the stack-pointer
-          (r3) has been saved in the chip ram location ENTRY_SP by the
-          interrupt vector, so we can use it as a scratch register; we
-          must also restore it before returning.  */
-       asm ("ld.w      %0[r0], sp;"
-            "add       1, sp;"
-            "st.w      sp, %0[r0];"
-            "ld.w      %1[r0], sp;" /* restore pre-irq stack-pointer */
-            "reti"
-            ::
-             "i" (HIGHRES_TIMER_SLOW_TICKS_ADDR),
-             "i" (ENTRY_SP_ADDR)
-            : "memory");
-}
-
-void highres_timer_reset (void)
-{
-       V850E_TIMER_D_TMD (HIGHRES_TIMER_TIMER_D_UNIT) = 0;
-       HIGHRES_TIMER_SLOW_TICKS = 0;
-}
-
-void highres_timer_start (void)
-{
-       u32 fast_tick_rate;
-
-       /* Start hardware timer.  */
-       v850e_timer_d_configure (HIGHRES_TIMER_TIMER_D_UNIT,
-                                HIGHRES_TIMER_SLOW_TICK_RATE);
-
-       fast_tick_rate =
-               (V850E_TIMER_D_BASE_FREQ
-                >> V850E_TIMER_D_DIVLOG2 (HIGHRES_TIMER_TIMER_D_UNIT));
-
-       /* The obvious way of calculating microseconds from fast ticks
-          is to do:
-
-            usec = fast_ticks * 10^6 / fast_tick_rate
-
-          However, divisions are much slower than multiplications, and
-          the above calculation can overflow, so we do this instead:
-
-            usec = fast_ticks * (10^6 * 2^12 / fast_tick_rate) / 2^12
-
-           since we can pre-calculate (10^6 * (2^12 / fast_tick_rate))
-          and use a shift for dividing by 2^12, this avoids division,
-          and is almost as accurate (it differs by about 2 microseconds
-          at the extreme value of the fast-tick counter's ranger).  */
-       highres_timer_usec_prescale = ((1000000 << HIGHRES_TIMER_USEC_SHIFT)
-                                      / fast_tick_rate);
-
-       /* Enable the interrupt (which is hardwired to this use), and
-          give it the highest priority.  */
-       V850E_INTC_IC (IRQ_INTCMD (HIGHRES_TIMER_TIMER_D_UNIT)) = 0;
-}
-
-void highres_timer_stop (void)
-{
-       /* Stop the timer.  */
-       V850E_TIMER_D_TMCD (HIGHRES_TIMER_TIMER_D_UNIT) =
-               V850E_TIMER_D_TMCD_CAE;
-       /* Disable its interrupt, just in case.  */
-       v850e_intc_disable_irq (IRQ_INTCMD (HIGHRES_TIMER_TIMER_D_UNIT));
-}
-
-inline void highres_timer_read_ticks (u32 *slow_ticks, u32 *fast_ticks)
-{
-       int flags;
-       u32 fast_ticks_1, fast_ticks_2, _slow_ticks;
-
-       local_irq_save (flags);
-       fast_ticks_1 = V850E_TIMER_D_TMD (HIGHRES_TIMER_TIMER_D_UNIT);
-       _slow_ticks = HIGHRES_TIMER_SLOW_TICKS;
-       fast_ticks_2 = V850E_TIMER_D_TMD (HIGHRES_TIMER_TIMER_D_UNIT);
-       local_irq_restore (flags);
-
-       if (fast_ticks_2 < fast_ticks_1)
-               _slow_ticks++;
-
-       *slow_ticks = _slow_ticks;
-       *fast_ticks = fast_ticks_2;
-}
-
-inline void highres_timer_ticks_to_timeval (u32 slow_ticks, u32 fast_ticks,
-                                           struct timeval *tv)
-{
-       unsigned long sec, sec_rem, usec;
-
-       usec = ((fast_ticks * highres_timer_usec_prescale)
-               >> HIGHRES_TIMER_USEC_SHIFT);
-
-       sec = slow_ticks / HIGHRES_TIMER_SLOW_TICK_RATE;
-       sec_rem = slow_ticks % HIGHRES_TIMER_SLOW_TICK_RATE;
-
-       usec += sec_rem * (1000000 / HIGHRES_TIMER_SLOW_TICK_RATE);
-
-       tv->tv_sec = sec;
-       tv->tv_usec = usec;
-}
-
-void highres_timer_read (struct timeval *tv)
-{
-       u32 fast_ticks, slow_ticks;
-       highres_timer_read_ticks (&slow_ticks, &fast_ticks);
-       highres_timer_ticks_to_timeval (slow_ticks, fast_ticks, tv);
-}