2 * Copyright 2009 Freescale Semicondutor, Inc.
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.
9 * provides masks and opcode images for use by code generation, emulation
10 * and for instructions that older assemblers might not know about
12 #ifndef _ASM_POWERPC_DBELL_H
13 #define _ASM_POWERPC_DBELL_H
15 #include <linux/smp.h>
16 #include <linux/threads.h>
18 #include <asm/ppc-opcode.h>
20 #define PPC_DBELL_MSG_BRDCAST (0x04000000)
21 #define PPC_DBELL_TYPE(x) (((x) & 0xf) << 28)
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 */
31 extern unsigned long dbell_smp_message[NR_CPUS];
32 extern void smp_dbell_message_pass(int target, int msg);
35 static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag)
37 u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) |
40 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
43 #endif /* _ASM_POWERPC_DBELL_H */