diff options
author | wdenk <wdenk> | 2004-08-01 22:48:16 +0000 |
---|---|---|
committer | wdenk <wdenk> | 2004-08-01 22:48:16 +0000 |
commit | 281e00a3be453a169d854f824a460359d10f92bb (patch) | |
tree | 43dab398f1d6f601bb44df108427f7e0c611d68d /cpu/arm920t/interrupts.c | |
parent | cfca5e604d5692f081cc1a9185ca5dc6dc77599d (diff) |
* Code cleanup
* Patch by Sascha Hauer, 28 Jun:
- add generic support for Motorola i.MX architecture
- add support for mx1ads, mx1fs2 and scb9328 boards
* Patches by Marc Leeman, 23 Jul 2004:
- Add define for the PCI/Memory Buffer Configuration Register
- corrected comments in cpu/mpc824x/cpu_init.c
* Add support for multiple serial interfaces
(for example to allow modem dial-in / dial-out)
Diffstat (limited to 'cpu/arm920t/interrupts.c')
-rw-r--r-- | cpu/arm920t/interrupts.c | 143 |
1 files changed, 1 insertions, 142 deletions
diff --git a/cpu/arm920t/interrupts.c b/cpu/arm920t/interrupts.c index 521c4f479df..ea58f154d40 100644 --- a/cpu/arm920t/interrupts.c +++ b/cpu/arm920t/interrupts.c @@ -30,25 +30,11 @@ */ #include <common.h> -#include <arm920t.h> -#if defined(CONFIG_S3C2400) -#include <s3c2400.h> -#elif defined(CONFIG_S3C2410) -#include <s3c2410.h> -#endif +#include <arm920t.h> #include <asm/proc-armv/ptrace.h> extern void reset_cpu(ulong addr); -int timer_load_val = 0; - -/* macro to read the 16 bit timer */ -static inline ulong READ_TIMER(void) -{ - S3C24X0_TIMERS * const timers = S3C24X0_GetBase_TIMERS(); - - return (timers->TCNTO4 & 0xffff); -} #ifdef CONFIG_USE_IRQ /* enable IRQ interrupts */ @@ -182,130 +168,3 @@ void do_irq (struct pt_regs *pt_regs) show_regs (pt_regs); bad_mode (); } - -static ulong timestamp; -static ulong lastdec; - -int interrupt_init (void) -{ - S3C24X0_TIMERS * const timers = S3C24X0_GetBase_TIMERS(); - - /* use PWM Timer 4 because it has no output */ - /* prescaler for Timer 4 is 16 */ - timers->TCFG0 = 0x0f00; - if (timer_load_val == 0) - { - /* - * for 10 ms clock period @ PCLK with 4 bit divider = 1/2 - * (default) and prescaler = 16. Should be 10390 - * @33.25MHz and 15625 @ 50 MHz - */ - timer_load_val = get_PCLK()/(2 * 16 * 100); - } - /* load value for 10 ms timeout */ - lastdec = timers->TCNTB4 = timer_load_val; - /* auto load, manual update of Timer 4 */ - timers->TCON = (timers->TCON & ~0x0700000) | 0x600000; - /* auto load, start Timer 4 */ - timers->TCON = (timers->TCON & ~0x0700000) | 0x500000; - timestamp = 0; - - return (0); -} - -/* - * timer without interrupts - */ - -void reset_timer (void) -{ - reset_timer_masked (); -} - -ulong get_timer (ulong base) -{ - return get_timer_masked () - base; -} - -void set_timer (ulong t) -{ - timestamp = t; -} - -void udelay (unsigned long usec) -{ - ulong tmo; - ulong start = get_timer(0); - - tmo = usec / 1000; - tmo *= (timer_load_val * 100); - tmo /= 1000; - - while ((ulong)(get_timer_masked () - start) < tmo) - /*NOP*/; -} - -void reset_timer_masked (void) -{ - /* reset time */ - lastdec = READ_TIMER(); - timestamp = 0; -} - -ulong get_timer_masked (void) -{ - ulong now = READ_TIMER(); - - if (lastdec >= now) { - /* normal mode */ - timestamp += lastdec - now; - } else { - /* we have an overflow ... */ - timestamp += lastdec + timer_load_val - now; - } - lastdec = now; - - return timestamp; -} - -void udelay_masked (unsigned long usec) -{ - ulong tmo; - - tmo = usec / 1000; - tmo *= (timer_load_val * 100); - tmo /= 1000; - - reset_timer_masked (); - - while (get_timer_masked () < tmo) - /*NOP*/; -} - -/* - * This function is derived from PowerPC code (read timebase as long long). - * On ARM it just returns the timer value. - */ -unsigned long long get_ticks(void) -{ - return get_timer(0); -} - -/* - * This function is derived from PowerPC code (timebase clock frequency). - * On ARM it returns the number of timer ticks per second. - */ -ulong get_tbclk (void) -{ - ulong tbclk; - -#if defined(CONFIG_SMDK2400) || defined(CONFIG_TRAB) - tbclk = timer_load_val * 100; -#elif defined(CONFIG_SMDK2410) || defined(CONFIG_VCMA9) - tbclk = CFG_HZ; -#else -# error "tbclk not configured" -#endif - - return tbclk; -} |