| Kumar Gala | 620165f | 2009-02-12 13:54:53 +0000 | [diff] [blame] | 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) |
| 22 | enum 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 | |
| 30 | #ifdef CONFIG_SMP |
| 31 | extern unsigned long dbell_smp_message[NR_CPUS]; |
| 32 | extern void smp_dbell_message_pass(int target, int msg); |
| 33 | #endif |
| 34 | |
| 35 | static 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 */ |