1 /* 2 * Copyright 2009 Freescale Semiconductor, 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 #include <asm/cpu_has_feature.h> 20 21 #define PPC_DBELL_MSG_BRDCAST (0x04000000) 22 #define PPC_DBELL_TYPE(x) (((x) & 0xf) << (63-36)) 23 #define PPC_DBELL_TYPE_MASK PPC_DBELL_TYPE(0xf) 24 #define PPC_DBELL_LPID(x) ((x) << (63 - 49)) 25 #define PPC_DBELL_PIR_MASK 0x3fff 26 enum ppc_dbell { 27 PPC_DBELL = 0, /* doorbell */ 28 PPC_DBELL_CRIT = 1, /* critical doorbell */ 29 PPC_G_DBELL = 2, /* guest doorbell */ 30 PPC_G_DBELL_CRIT = 3, /* guest critical doorbell */ 31 PPC_G_DBELL_MC = 4, /* guest mcheck doorbell */ 32 PPC_DBELL_SERVER = 5, /* doorbell on server */ 33 }; 34 35 #ifdef CONFIG_PPC_BOOK3S 36 37 #define PPC_DBELL_MSGTYPE PPC_DBELL_SERVER 38 #define SPRN_DOORBELL_CPUTAG SPRN_TIR 39 #define PPC_DBELL_TAG_MASK 0x7f 40 41 static inline void _ppc_msgsnd(u32 msg) 42 { 43 if (cpu_has_feature(CPU_FTR_HVMODE)) 44 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); 45 else 46 __asm__ __volatile__ (PPC_MSGSNDP(%0) : : "r" (msg)); 47 } 48 49 #else /* CONFIG_PPC_BOOK3S */ 50 51 #define PPC_DBELL_MSGTYPE PPC_DBELL 52 #define SPRN_DOORBELL_CPUTAG SPRN_PIR 53 #define PPC_DBELL_TAG_MASK 0x3fff 54 55 static inline void _ppc_msgsnd(u32 msg) 56 { 57 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); 58 } 59 60 #endif /* CONFIG_PPC_BOOK3S */ 61 62 extern void doorbell_cause_ipi(int cpu, unsigned long data); 63 extern void doorbell_exception(struct pt_regs *regs); 64 extern void doorbell_setup_this_cpu(void); 65 66 static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag) 67 { 68 u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) | 69 (tag & 0x07ffffff); 70 71 _ppc_msgsnd(msg); 72 } 73 74 #endif /* _ASM_POWERPC_DBELL_H */ 75