183d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+ 2a47a12beSStefan Roese /* 3a47a12beSStefan Roese * (C) Copyright 2000-2002 4a47a12beSStefan Roese * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 5a47a12beSStefan Roese * 6a47a12beSStefan Roese * (C) Copyright 2003 7a47a12beSStefan Roese * Gleb Natapov <gnatapov@mrv.com> 8a47a12beSStefan Roese */ 9a47a12beSStefan Roese 10a47a12beSStefan Roese #include <common.h> 11a47a12beSStefan Roese #include <asm/processor.h> 12a47a12beSStefan Roese #include <watchdog.h> 132d8d190cSUri Mashiach #ifdef CONFIG_LED_STATUS 14a47a12beSStefan Roese #include <status_led.h> 15a47a12beSStefan Roese #endif 16a47a12beSStefan Roese 17*2c21749dSMario Six #ifndef CONFIG_MPC83XX_TIMER 18a47a12beSStefan Roese #ifdef CONFIG_SHOW_ACTIVITY 19a47a12beSStefan Roese void board_show_activity (ulong) __attribute__((weak, alias("__board_show_activity"))); 20a47a12beSStefan Roese __board_show_activity(ulong dummy)21a47a12beSStefan Roesevoid __board_show_activity (ulong dummy) 22a47a12beSStefan Roese { 23a47a12beSStefan Roese return; 24a47a12beSStefan Roese } 25a47a12beSStefan Roese #endif /* CONFIG_SHOW_ACTIVITY */ 26a47a12beSStefan Roese 27a47a12beSStefan Roese #ifndef CONFIG_SYS_WATCHDOG_FREQ 28a47a12beSStefan Roese #define CONFIG_SYS_WATCHDOG_FREQ (CONFIG_SYS_HZ / 2) 29a47a12beSStefan Roese #endif 30a47a12beSStefan Roese 31a47a12beSStefan Roese static unsigned decrementer_count; /* count value for 1e6/HZ microseconds */ 32a47a12beSStefan Roese get_dec(void)33a47a12beSStefan Roesestatic __inline__ unsigned long get_dec (void) 34a47a12beSStefan Roese { 35a47a12beSStefan Roese unsigned long val; 36a47a12beSStefan Roese 37a47a12beSStefan Roese asm volatile ("mfdec %0":"=r" (val):); 38a47a12beSStefan Roese 39a47a12beSStefan Roese return val; 40a47a12beSStefan Roese } 41a47a12beSStefan Roese 42a47a12beSStefan Roese set_dec(unsigned long val)43a47a12beSStefan Roesestatic __inline__ void set_dec (unsigned long val) 44a47a12beSStefan Roese { 45a47a12beSStefan Roese if (val) 46a47a12beSStefan Roese asm volatile ("mtdec %0"::"r" (val)); 47a47a12beSStefan Roese } 48*2c21749dSMario Six #endif /* !CONFIG_MPC83XX_TIMER */ 49a47a12beSStefan Roese enable_interrupts(void)50a47a12beSStefan Roesevoid enable_interrupts (void) 51a47a12beSStefan Roese { 52a47a12beSStefan Roese set_msr (get_msr () | MSR_EE); 53a47a12beSStefan Roese } 54a47a12beSStefan Roese 55a47a12beSStefan Roese /* returns flag if MSR_EE was set before */ disable_interrupts(void)56a47a12beSStefan Roeseint disable_interrupts (void) 57a47a12beSStefan Roese { 58a47a12beSStefan Roese ulong msr = get_msr (); 59a47a12beSStefan Roese 60a47a12beSStefan Roese set_msr (msr & ~MSR_EE); 61a47a12beSStefan Roese return ((msr & MSR_EE) != 0); 62a47a12beSStefan Roese } 63a47a12beSStefan Roese 64*2c21749dSMario Six #ifndef CONFIG_MPC83XX_TIMER interrupt_init(void)65a47a12beSStefan Roeseint interrupt_init (void) 66a47a12beSStefan Roese { 67a47a12beSStefan Roese /* call cpu specific function from $(CPU)/interrupts.c */ 68deff9b1dSTom Rini interrupt_init_cpu (&decrementer_count); 69a47a12beSStefan Roese 70a47a12beSStefan Roese set_dec (decrementer_count); 71a47a12beSStefan Roese 72a47a12beSStefan Roese set_msr (get_msr () | MSR_EE); 73a47a12beSStefan Roese 74a47a12beSStefan Roese return (0); 75a47a12beSStefan Roese } 76a47a12beSStefan Roese 77a47a12beSStefan Roese static volatile ulong timestamp = 0; 78a47a12beSStefan Roese timer_interrupt(struct pt_regs * regs)79a47a12beSStefan Roesevoid timer_interrupt (struct pt_regs *regs) 80a47a12beSStefan Roese { 81a47a12beSStefan Roese /* call cpu specific function from $(CPU)/interrupts.c */ 82a47a12beSStefan Roese timer_interrupt_cpu (regs); 83a47a12beSStefan Roese 84a47a12beSStefan Roese /* Restore Decrementer Count */ 85a47a12beSStefan Roese set_dec (decrementer_count); 86a47a12beSStefan Roese 87a47a12beSStefan Roese timestamp++; 88a47a12beSStefan Roese 89a47a12beSStefan Roese #if defined(CONFIG_WATCHDOG) || defined (CONFIG_HW_WATCHDOG) 90a47a12beSStefan Roese if ((timestamp % (CONFIG_SYS_WATCHDOG_FREQ)) == 0) 91a47a12beSStefan Roese WATCHDOG_RESET (); 92a47a12beSStefan Roese #endif /* CONFIG_WATCHDOG || CONFIG_HW_WATCHDOG */ 93a47a12beSStefan Roese 942d8d190cSUri Mashiach #ifdef CONFIG_LED_STATUS 95a47a12beSStefan Roese status_led_tick (timestamp); 962d8d190cSUri Mashiach #endif /* CONFIG_LED_STATUS */ 97a47a12beSStefan Roese 98a47a12beSStefan Roese #ifdef CONFIG_SHOW_ACTIVITY 99a47a12beSStefan Roese board_show_activity (timestamp); 100a47a12beSStefan Roese #endif /* CONFIG_SHOW_ACTIVITY */ 101a47a12beSStefan Roese } 102a47a12beSStefan Roese get_timer(ulong base)103a47a12beSStefan Roeseulong get_timer (ulong base) 104a47a12beSStefan Roese { 105a47a12beSStefan Roese return (timestamp - base); 106a47a12beSStefan Roese } 107*2c21749dSMario Six #endif /* !CONFIG_MPC83XX_TIMER */ 108