1 /* $OpenBSD: intc.h,v 1.2 2014/03/29 18:09:28 guenther Exp $ */ 2 /* 3 * Copyright (c) 2007,2009 Dale Rahn <drahn@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #ifndef _OMAPINTC_INTR_H_ 19 #define _OMAPINTC_INTR_H_ 20 21 #ifndef _LOCORE 22 23 #include <arm/armreg.h> 24 #include <arm/cpufunc.h> 25 #include <machine/intr.h> 26 #include <arm/softintr.h> 27 28 extern volatile int current_spl_level; 29 extern volatile int softint_pending; 30 void intc_do_pending(void); 31 32 #define SI_TO_IRQBIT(si) (1U<<(si)) 33 void intc_setipl(int new); 34 void intc_splx(int new); 35 int intc_splraise(int ipl); 36 int intc_spllower(int ipl); 37 void intc_setsoftintr(int si); 38 39 /* 40 * An useful function for interrupt handlers. 41 * XXX: This shouldn't be here. 42 */ 43 static __inline int 44 find_first_bit( uint32_t bits ) 45 { 46 int count; 47 48 /* since CLZ is available only on ARMv5, this isn't portable 49 * to all ARM CPUs. This file is for OMAPINTC processor. 50 */ 51 asm( "clz %0, %1" : "=r" (count) : "r" (bits) ); 52 return 31-count; 53 } 54 55 56 /* 57 * This function *MUST* be called very early on in a port's 58 * initarm() function, before ANY spl*() functions are called. 59 * 60 * The parameter is the virtual address of the OMAPINTC's Interrupt 61 * Controller registers. 62 */ 63 void intc_intr_bootstrap(vaddr_t); 64 65 void intc_irq_handler(void *); 66 void *intc_intr_establish(int irqno, int level, int (*func)(void *), 67 void *cookie, char *name); 68 void intc_intr_disestablish(void *cookie); 69 const char *intc_intr_string(void *cookie); 70 71 #endif /* ! _LOCORE */ 72 73 #endif /* _OMAPINTC_INTR_H_ */ 74 75