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) << (63-36))
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 extern void doorbell_cause_ipi(int cpu, unsigned long data);
31 extern void doorbell_exception(struct pt_regs *regs);
32 extern void doorbell_setup_this_cpu(void);
33
ppc_msgsnd(enum ppc_dbell type,u32 flags,u32 tag)34 static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag)
35 {
36 u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) |
37 (tag & 0x07ffffff);
38
39 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
40 }
41
42 #endif /* _ASM_POWERPC_DBELL_H */
43