142 lines
2.5 KiB
C
142 lines
2.5 KiB
C
/* ARM-specific clock functions. */
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#include "kernel/kernel.h"
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#include "kernel/clock.h"
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#include "kernel/proc.h"
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#include "kernel/interrupt.h"
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#include <minix/u64.h>
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#include <minix/board.h>
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#include "kernel/glo.h"
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#include "kernel/profile.h"
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#include <assert.h>
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#include "kernel/spinlock.h"
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#ifdef CONFIG_SMP
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#include "kernel/smp.h"
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#endif
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#include "omap_timer.h"
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#include "omap_intr.h"
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static unsigned tsc_per_ms[CONFIG_MAX_CPUS];
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int init_local_timer(unsigned freq)
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{
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omap3_timer_init(freq);
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omap3_frclock_init();
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if (BOARD_IS_BBXM(machine.board_id)) {
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tsc_per_ms[0] = 16250;
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} else if (BOARD_IS_BB(machine.board_id)) {
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tsc_per_ms[0] = 15000;
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} else {
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panic("Can not do the clock setup. machine (0x%08x) is unknown\n",machine.board_id);
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};
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return 0;
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}
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void stop_local_timer(void)
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{
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omap3_timer_stop();
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}
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void arch_timer_int_handler(void)
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{
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omap3_timer_int_handler();
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}
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void cycles_accounting_init(void)
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{
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read_tsc_64(get_cpu_var_ptr(cpu, tsc_ctr_switch));
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get_cpu_var(cpu, cpu_last_tsc) = 0;
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get_cpu_var(cpu, cpu_last_idle) = 0;
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}
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void context_stop(struct proc * p)
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{
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u64_t tsc;
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u32_t tsc_delta;
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u64_t * __tsc_ctr_switch = get_cpulocal_var_ptr(tsc_ctr_switch);
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read_tsc_64(&tsc);
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assert(tsc >= *__tsc_ctr_switch);
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tsc_delta = tsc - *__tsc_ctr_switch;
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p->p_cycles += tsc_delta;
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if(kbill_ipc) {
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kbill_ipc->p_kipc_cycles += tsc_delta;
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kbill_ipc = NULL;
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}
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if(kbill_kcall) {
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kbill_kcall->p_kcall_cycles += tsc_delta;
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kbill_kcall = NULL;
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}
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/*
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* deduct the just consumed cpu cycles from the cpu time left for this
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* process during its current quantum. Skip IDLE and other pseudo kernel
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* tasks
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*/
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if (p->p_endpoint >= 0) {
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#if DEBUG_RACE
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p->p_cpu_time_left = 0;
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#else
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if (tsc_delta < p->p_cpu_time_left) {
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p->p_cpu_time_left -= tsc_delta;
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} else p->p_cpu_time_left = 0;
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#endif
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}
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*__tsc_ctr_switch = tsc;
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}
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void context_stop_idle(void)
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{
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int is_idle;
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#ifdef CONFIG_SMP
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unsigned cpu = cpuid;
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#endif
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is_idle = get_cpu_var(cpu, cpu_is_idle);
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get_cpu_var(cpu, cpu_is_idle) = 0;
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context_stop(get_cpulocal_var_ptr(idle_proc));
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if (is_idle)
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restart_local_timer();
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#if SPROFILE
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if (sprofiling)
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get_cpulocal_var(idle_interrupted) = 1;
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#endif
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}
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void restart_local_timer(void)
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{
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}
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int register_local_timer_handler(const irq_handler_t handler)
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{
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return omap3_register_timer_handler(handler);
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}
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u64_t ms_2_cpu_time(unsigned ms)
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{
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return mul64u(tsc_per_ms[cpuid], ms);
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}
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unsigned cpu_time_2_ms(u64_t cpu_time)
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{
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return div64u(cpu_time, tsc_per_ms[cpuid]);
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}
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short cpu_load(void)
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{
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return 0;
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}
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