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620165f9 | 1 | /* |
8a56e1ee | 2 | * Copyright 2009 Freescale Semiconductor, Inc. |
620165f9 KG |
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> | |
b92a226e | 19 | #include <asm/cpu_has_feature.h> |
620165f9 KG |
20 | |
21 | #define PPC_DBELL_MSG_BRDCAST (0x04000000) | |
dc28518f | 22 | #define PPC_DBELL_TYPE(x) (((x) & 0xf) << (63-36)) |
4ab96919 | 23 | #define PPC_DBELL_TYPE_MASK PPC_DBELL_TYPE(0xf) |
d30f6e48 | 24 | #define PPC_DBELL_LPID(x) ((x) << (63 - 49)) |
4ab96919 | 25 | #define PPC_DBELL_PIR_MASK 0x3fff |
620165f9 KG |
26 | enum 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 */ | |
42d02b81 | 32 | PPC_DBELL_SERVER = 5, /* doorbell on server */ |
620165f9 KG |
33 | }; |
34 | ||
42d02b81 IM |
35 | #ifdef CONFIG_PPC_BOOK3S |
36 | ||
37 | #define PPC_DBELL_MSGTYPE PPC_DBELL_SERVER | |
42d02b81 | 38 | |
919ca868 IM |
39 | static inline void _ppc_msgsnd(u32 msg) |
40 | { | |
a5adf282 NP |
41 | __asm__ __volatile__ (ASM_FTR_IFSET(PPC_MSGSND(%1), PPC_MSGSNDP(%1), %0) |
42 | : : "i" (CPU_FTR_HVMODE), "r" (msg)); | |
919ca868 IM |
43 | } |
44 | ||
b87ac021 NP |
45 | /* sync before sending message */ |
46 | static inline void ppc_msgsnd_sync(void) | |
47 | { | |
48 | __asm__ __volatile__ ("sync" : : : "memory"); | |
49 | } | |
50 | ||
51 | /* sync after taking message interrupt */ | |
52 | static inline void ppc_msgsync(void) | |
53 | { | |
6b3edefe NP |
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)); | |
b87ac021 NP |
57 | } |
58 | ||
42d02b81 IM |
59 | #else /* CONFIG_PPC_BOOK3S */ |
60 | ||
61 | #define PPC_DBELL_MSGTYPE PPC_DBELL | |
42d02b81 | 62 | |
919ca868 IM |
63 | static inline void _ppc_msgsnd(u32 msg) |
64 | { | |
65 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); | |
66 | } | |
67 | ||
b87ac021 NP |
68 | /* sync before sending message */ |
69 | static inline void ppc_msgsnd_sync(void) | |
70 | { | |
71 | __asm__ __volatile__ ("sync" : : : "memory"); | |
72 | } | |
73 | ||
74 | /* sync after taking message interrupt */ | |
75 | static inline void ppc_msgsync(void) | |
76 | { | |
77 | } | |
78 | ||
42d02b81 IM |
79 | #endif /* CONFIG_PPC_BOOK3S */ |
80 | ||
b866cc21 NP |
81 | extern void doorbell_global_ipi(int cpu); |
82 | extern void doorbell_core_ipi(int cpu); | |
83 | extern int doorbell_try_core_ipi(int cpu); | |
b9f1cd71 | 84 | extern void doorbell_exception(struct pt_regs *regs); |
620165f9 KG |
85 | |
86 | static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag) | |
87 | { | |
88 | u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) | | |
89 | (tag & 0x07ffffff); | |
90 | ||
919ca868 | 91 | _ppc_msgsnd(msg); |
620165f9 KG |
92 | } |
93 | ||
94 | #endif /* _ASM_POWERPC_DBELL_H */ |