2 * Copyright 2009 Freescale Semiconductor, 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) << (63-36))
22 #define PPC_DBELL_TYPE_MASK PPC_DBELL_TYPE(0xf)
23 #define PPC_DBELL_LPID(x) ((x) << (63 - 49))
24 #define PPC_DBELL_PIR_MASK 0x3fff
26 PPC_DBELL = 0, /* doorbell */
27 PPC_DBELL_CRIT = 1, /* critical doorbell */
28 PPC_G_DBELL = 2, /* guest doorbell */
29 PPC_G_DBELL_CRIT = 3, /* guest critical doorbell */
30 PPC_G_DBELL_MC = 4, /* guest mcheck doorbell */
33 extern void doorbell_cause_ipi(int cpu, unsigned long data);
34 extern void doorbell_exception(struct pt_regs *regs);
35 extern void doorbell_setup_this_cpu(void);
37 static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag)
39 u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) |
42 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
45 #endif /* _ASM_POWERPC_DBELL_H */