1/* 2 * Copyright 2009 Freescale Semicondutor, Inc. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 * 9 * provides masks and opcode images for use by code generation, emulation 10 * and for instructions that older assemblers might not know about 11 */ 12#ifndef _ASM_POWERPC_DBELL_H 13#define _ASM_POWERPC_DBELL_H 14 15#include <linux/smp.h> 16#include <linux/threads.h> 17 18#include <asm/ppc-opcode.h> 19 20#define PPC_DBELL_MSG_BRDCAST (0x04000000) 21#define PPC_DBELL_TYPE(x) (((x) & 0xf) << 28) 22enum ppc_dbell { 23 PPC_DBELL = 0, /* doorbell */ 24 PPC_DBELL_CRIT = 1, /* critical doorbell */ 25 PPC_G_DBELL = 2, /* guest doorbell */ 26 PPC_G_DBELL_CRIT = 3, /* guest critical doorbell */ 27 PPC_G_DBELL_MC = 4, /* guest mcheck doorbell */ 28}; 29 30extern void doorbell_message_pass(int target, int msg); 31extern void doorbell_exception(struct pt_regs *regs); 32extern void doorbell_check_self(void); 33extern void doorbell_setup_this_cpu(void); 34 35static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag) 36{ 37 u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) | 38 (tag & 0x07ffffff); 39 40 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); 41} 42 43#endif /* _ASM_POWERPC_DBELL_H */ 44