1/*
 2 * Copyright 2009 Freescale Semiconductor, 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#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
25enum ppc_dbell {
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 */
31	PPC_DBELL_SERVER = 5,	/* doorbell on server */
32};
33
34#ifdef CONFIG_PPC_BOOK3S
35
36#define PPC_DBELL_MSGTYPE		PPC_DBELL_SERVER
37#define SPRN_DOORBELL_CPUTAG		SPRN_TIR
38#define PPC_DBELL_TAG_MASK		0x7f
39
40static inline void _ppc_msgsnd(u32 msg)
41{
42	if (cpu_has_feature(CPU_FTR_HVMODE))
43		__asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
44	else
45		__asm__ __volatile__ (PPC_MSGSNDP(%0) : : "r" (msg));
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
46}
47
48#else /* CONFIG_PPC_BOOK3S */
49
50#define PPC_DBELL_MSGTYPE		PPC_DBELL
51#define SPRN_DOORBELL_CPUTAG		SPRN_PIR
52#define PPC_DBELL_TAG_MASK		0x3fff
53
54static inline void _ppc_msgsnd(u32 msg)
55{
56	__asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
57}
58
 
 
 
 
 
 
 
 
 
 
 
59#endif /* CONFIG_PPC_BOOK3S */
60
61extern void doorbell_cause_ipi(int cpu, unsigned long data);
 
 
62extern void doorbell_exception(struct pt_regs *regs);
63extern void doorbell_setup_this_cpu(void);
64
65static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag)
66{
67	u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) |
68			(tag & 0x07ffffff);
69
70	_ppc_msgsnd(msg);
71}
72
73#endif /* _ASM_POWERPC_DBELL_H */

  1/*
  2 * Copyright 2009 Freescale Semiconductor, 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#include <asm/cpu_has_feature.h>
 20
 21#define PPC_DBELL_MSG_BRDCAST	(0x04000000)
 22#define PPC_DBELL_TYPE(x)	(((x) & 0xf) << (63-36))
 23#define PPC_DBELL_TYPE_MASK	PPC_DBELL_TYPE(0xf)
 24#define PPC_DBELL_LPID(x)	((x) << (63 - 49))
 25#define PPC_DBELL_PIR_MASK	0x3fff
 26enum 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 */
 32	PPC_DBELL_SERVER = 5,	/* doorbell on server */
 33};
 34
 35#ifdef CONFIG_PPC_BOOK3S
 36
 37#define PPC_DBELL_MSGTYPE		PPC_DBELL_SERVER
 
 
 38
 39static inline void _ppc_msgsnd(u32 msg)
 40{
 41	__asm__ __volatile__ (ASM_FTR_IFSET(PPC_MSGSND(%1), PPC_MSGSNDP(%1), %0)
 42				: : "i" (CPU_FTR_HVMODE), "r" (msg));
 43}
 44
 45/* sync before sending message */
 46static inline void ppc_msgsnd_sync(void)
 47{
 48	__asm__ __volatile__ ("sync" : : : "memory");
 49}
 50
 51/* sync after taking message interrupt */
 52static inline void ppc_msgsync(void)
 53{
 54	/* sync is not required when taking messages from the same core */
 55	__asm__ __volatile__ (ASM_FTR_IFSET(PPC_MSGSYNC " ; lwsync", "", %0)
 56				: : "i" (CPU_FTR_HVMODE|CPU_FTR_ARCH_300));
 57}
 58
 59static inline void _ppc_msgclr(u32 msg)
 60{
 61	__asm__ __volatile__ (ASM_FTR_IFSET(PPC_MSGCLR(%1), PPC_MSGCLRP(%1), %0)
 62				: : "i" (CPU_FTR_HVMODE), "r" (msg));
 63}
 64
 65static inline void ppc_msgclr(enum ppc_dbell type)
 66{
 67	u32 msg = PPC_DBELL_TYPE(type);
 68
 69	_ppc_msgclr(msg);
 70}
 71
 72#else /* CONFIG_PPC_BOOK3S */
 73
 74#define PPC_DBELL_MSGTYPE		PPC_DBELL
 
 
 75
 76static inline void _ppc_msgsnd(u32 msg)
 77{
 78	__asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
 79}
 80
 81/* sync before sending message */
 82static inline void ppc_msgsnd_sync(void)
 83{
 84	__asm__ __volatile__ ("sync" : : : "memory");
 85}
 86
 87/* sync after taking message interrupt */
 88static inline void ppc_msgsync(void)
 89{
 90}
 91
 92#endif /* CONFIG_PPC_BOOK3S */
 93
 94extern void doorbell_global_ipi(int cpu);
 95extern void doorbell_core_ipi(int cpu);
 96extern int doorbell_try_core_ipi(int cpu);
 97extern void doorbell_exception(struct pt_regs *regs);
 
 98
 99static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag)
100{
101	u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) |
102			(tag & 0x07ffffff);
103
104	_ppc_msgsnd(msg);
105}
106
107#endif /* _ASM_POWERPC_DBELL_H */