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Kumar Gala620165f2009-02-12 13:54:53 +00001/*
Yang Li8a56e1e2012-11-01 18:53:42 +00002 * Copyright 2009 Freescale Semiconductor, Inc.
Kumar Gala620165f2009-02-12 13:54:53 +00003 *
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>
Kevin Haob92a2262016-07-23 14:42:40 +053019#include <asm/cpu_has_feature.h>
Kumar Gala620165f2009-02-12 13:54:53 +000020
21#define PPC_DBELL_MSG_BRDCAST (0x04000000)
Michael Neulingdc285182011-06-05 16:48:47 +000022#define PPC_DBELL_TYPE(x) (((x) & 0xf) << (63-36))
Alexander Graf4ab96912012-02-15 13:28:48 +000023#define PPC_DBELL_TYPE_MASK PPC_DBELL_TYPE(0xf)
Scott Woodd30f6e42011-12-20 15:34:43 +000024#define PPC_DBELL_LPID(x) ((x) << (63 - 49))
Alexander Graf4ab96912012-02-15 13:28:48 +000025#define PPC_DBELL_PIR_MASK 0x3fff
Kumar Gala620165f2009-02-12 13:54:53 +000026enum 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 */
Ian Munsie42d02b82012-11-14 18:49:44 +000032 PPC_DBELL_SERVER = 5, /* doorbell on server */
Kumar Gala620165f2009-02-12 13:54:53 +000033};
34
Ian Munsie42d02b82012-11-14 18:49:44 +000035#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
Ian Munsie919ca862012-11-14 18:49:47 +000041static 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
Ian Munsie42d02b82012-11-14 18:49:44 +000049#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
Ian Munsie919ca862012-11-14 18:49:47 +000055static inline void _ppc_msgsnd(u32 msg)
56{
57 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
58}
59
Ian Munsie42d02b82012-11-14 18:49:44 +000060#endif /* CONFIG_PPC_BOOK3S */
61
Milton Miller23d72bf2011-05-10 19:29:39 +000062extern void doorbell_cause_ipi(int cpu, unsigned long data);
Benjamin Herrenschmidtb9f1cd72010-07-09 15:29:53 +100063extern void doorbell_exception(struct pt_regs *regs);
64extern void doorbell_setup_this_cpu(void);
Kumar Gala620165f2009-02-12 13:54:53 +000065
66static 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
Ian Munsie919ca862012-11-14 18:49:47 +000071 _ppc_msgsnd(msg);
Kumar Gala620165f2009-02-12 13:54:53 +000072}
73
74#endif /* _ASM_POWERPC_DBELL_H */