diff options
Diffstat (limited to 'arch/mips/sibyte/bcm1480/time.c')
| -rw-r--r-- | arch/mips/sibyte/bcm1480/time.c | 123 |
1 files changed, 6 insertions, 117 deletions
diff --git a/arch/mips/sibyte/bcm1480/time.c b/arch/mips/sibyte/bcm1480/time.c index 7e088f6c4a8..1680a68952a 100644 --- a/arch/mips/sibyte/bcm1480/time.c +++ b/arch/mips/sibyte/bcm1480/time.c @@ -15,124 +15,13 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +#include <linux/init.h> -/* - * These are routines to set up and handle interrupts from the - * bcm1480 general purpose timer 0. We're using the timer as a - * system clock, so we set it up to run at 100 Hz. On every - * interrupt, we update our idea of what the time of day is, - * then call do_timer() in the architecture-independent kernel - * code to do general bookkeeping (e.g. update jiffies, run - * bottom halves, etc.) - */ -#include <linux/interrupt.h> -#include <linux/sched.h> -#include <linux/spinlock.h> -#include <linux/kernel_stat.h> - -#include <asm/irq.h> -#include <asm/ptrace.h> -#include <asm/addrspace.h> -#include <asm/time.h> -#include <asm/io.h> - -#include <asm/sibyte/bcm1480_regs.h> -#include <asm/sibyte/sb1250_regs.h> -#include <asm/sibyte/bcm1480_int.h> -#include <asm/sibyte/bcm1480_scd.h> - -#include <asm/sibyte/sb1250.h> - - -#define IMR_IP2_VAL K_BCM1480_INT_MAP_I0 -#define IMR_IP3_VAL K_BCM1480_INT_MAP_I1 -#define IMR_IP4_VAL K_BCM1480_INT_MAP_I2 +extern void sb1480_clockevent_init(void); +extern void sb1480_clocksource_init(void); -extern int bcm1480_steal_irq(int irq); - -void bcm1480_time_init(void) +void __init plat_time_init(void) { - int cpu = smp_processor_id(); - int irq = K_BCM1480_INT_TIMER_0+cpu; - - /* Only have 4 general purpose timers */ - if (cpu > 3) { - BUG(); - } - - if (!cpu) { - /* Use our own gettimeoffset() routine */ - do_gettimeoffset = bcm1480_gettimeoffset; - } - - bcm1480_mask_irq(cpu, irq); - - /* Map the timer interrupt to ip[4] of this cpu */ - __raw_writeq(IMR_IP4_VAL, IOADDR(A_BCM1480_IMR_REGISTER(cpu, R_BCM1480_IMR_INTERRUPT_MAP_BASE_H) - + (irq<<3))); - - /* the general purpose timer ticks at 1 Mhz independent of the rest of the system */ - /* Disable the timer and set up the count */ - __raw_writeq(0, IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG))); - __raw_writeq( -#ifndef CONFIG_SIMULATION - 1000000/HZ -#else - 50000/HZ -#endif - , IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT))); - - /* Set the timer running */ - __raw_writeq(M_SCD_TIMER_ENABLE|M_SCD_TIMER_MODE_CONTINUOUS, - IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG))); - - bcm1480_unmask_irq(cpu, irq); - bcm1480_steal_irq(irq); - /* - * This interrupt is "special" in that it doesn't use the request_irq - * way to hook the irq line. The timer interrupt is initialized early - * enough to make this a major pain, and it's also firing enough to - * warrant a bit of special case code. bcm1480_timer_interrupt is - * called directly from irq_handler.S when IP[4] is set during an - * interrupt - */ -} - -#include <asm/sibyte/sb1250.h> - -void bcm1480_timer_interrupt(struct pt_regs *regs) -{ - int cpu = smp_processor_id(); - int irq = K_BCM1480_INT_TIMER_0+cpu; - - /* Reset the timer */ - __raw_writeq(M_SCD_TIMER_ENABLE|M_SCD_TIMER_MODE_CONTINUOUS, - IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG))); - - if (cpu == 0) { - /* - * CPU 0 handles the global timer interrupt job - */ - ll_timer_interrupt(irq, regs); - } - else { - /* - * other CPUs should just do profiling and process accounting - */ - ll_local_timer_interrupt(irq, regs); - } -} - -/* - * We use our own do_gettimeoffset() instead of the generic one, - * because the generic one does not work for SMP case. - * In addition, since we use general timer 0 for system time, - * we can get accurate intra-jiffy offset without calibration. - */ -unsigned long bcm1480_gettimeoffset(void) -{ - unsigned long count = - __raw_readq(IOADDR(A_SCD_TIMER_REGISTER(0, R_SCD_TIMER_CNT))); - - return 1000000/HZ - count; + sb1480_clocksource_init(); + sb1480_clockevent_init(); } |