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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
620165f9 | 2 | /* |
8a56e1ee | 3 | * Copyright 2009 Freescale Semiconductor, Inc. |
620165f9 | 4 | * |
620165f9 KG |
5 | * provides masks and opcode images for use by code generation, emulation |
6 | * and for instructions that older assemblers might not know about | |
7 | */ | |
8 | #ifndef _ASM_POWERPC_DBELL_H | |
9 | #define _ASM_POWERPC_DBELL_H | |
10 | ||
11 | #include <linux/smp.h> | |
12 | #include <linux/threads.h> | |
13 | ||
14 | #include <asm/ppc-opcode.h> | |
2c86cd18 | 15 | #include <asm/feature-fixups.h> |
620165f9 KG |
16 | |
17 | #define PPC_DBELL_MSG_BRDCAST (0x04000000) | |
dc28518f | 18 | #define PPC_DBELL_TYPE(x) (((x) & 0xf) << (63-36)) |
4ab96919 | 19 | #define PPC_DBELL_TYPE_MASK PPC_DBELL_TYPE(0xf) |
d30f6e48 | 20 | #define PPC_DBELL_LPID(x) ((x) << (63 - 49)) |
4ab96919 | 21 | #define PPC_DBELL_PIR_MASK 0x3fff |
620165f9 KG |
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 */ | |
42d02b81 | 28 | PPC_DBELL_SERVER = 5, /* doorbell on server */ |
620165f9 KG |
29 | }; |
30 | ||
42d02b81 IM |
31 | #ifdef CONFIG_PPC_BOOK3S |
32 | ||
33 | #define PPC_DBELL_MSGTYPE PPC_DBELL_SERVER | |
42d02b81 | 34 | |
919ca868 IM |
35 | static inline void _ppc_msgsnd(u32 msg) |
36 | { | |
a5adf282 NP |
37 | __asm__ __volatile__ (ASM_FTR_IFSET(PPC_MSGSND(%1), PPC_MSGSNDP(%1), %0) |
38 | : : "i" (CPU_FTR_HVMODE), "r" (msg)); | |
919ca868 IM |
39 | } |
40 | ||
b87ac021 NP |
41 | /* sync before sending message */ |
42 | static inline void ppc_msgsnd_sync(void) | |
43 | { | |
44 | __asm__ __volatile__ ("sync" : : : "memory"); | |
45 | } | |
46 | ||
47 | /* sync after taking message interrupt */ | |
48 | static inline void ppc_msgsync(void) | |
49 | { | |
6b3edefe NP |
50 | /* sync is not required when taking messages from the same core */ |
51 | __asm__ __volatile__ (ASM_FTR_IFSET(PPC_MSGSYNC " ; lwsync", "", %0) | |
52 | : : "i" (CPU_FTR_HVMODE|CPU_FTR_ARCH_300)); | |
b87ac021 NP |
53 | } |
54 | ||
a9af97aa NP |
55 | static inline void _ppc_msgclr(u32 msg) |
56 | { | |
57 | __asm__ __volatile__ (ASM_FTR_IFSET(PPC_MSGCLR(%1), PPC_MSGCLRP(%1), %0) | |
58 | : : "i" (CPU_FTR_HVMODE), "r" (msg)); | |
59 | } | |
60 | ||
61 | static inline void ppc_msgclr(enum ppc_dbell type) | |
62 | { | |
63 | u32 msg = PPC_DBELL_TYPE(type); | |
64 | ||
65 | _ppc_msgclr(msg); | |
66 | } | |
67 | ||
42d02b81 IM |
68 | #else /* CONFIG_PPC_BOOK3S */ |
69 | ||
70 | #define PPC_DBELL_MSGTYPE PPC_DBELL | |
42d02b81 | 71 | |
919ca868 IM |
72 | static inline void _ppc_msgsnd(u32 msg) |
73 | { | |
74 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); | |
75 | } | |
76 | ||
b87ac021 NP |
77 | /* sync before sending message */ |
78 | static inline void ppc_msgsnd_sync(void) | |
79 | { | |
80 | __asm__ __volatile__ ("sync" : : : "memory"); | |
81 | } | |
82 | ||
83 | /* sync after taking message interrupt */ | |
84 | static inline void ppc_msgsync(void) | |
85 | { | |
86 | } | |
87 | ||
42d02b81 IM |
88 | #endif /* CONFIG_PPC_BOOK3S */ |
89 | ||
b866cc21 NP |
90 | extern void doorbell_global_ipi(int cpu); |
91 | extern void doorbell_core_ipi(int cpu); | |
92 | extern int doorbell_try_core_ipi(int cpu); | |
b9f1cd71 | 93 | extern void doorbell_exception(struct pt_regs *regs); |
620165f9 KG |
94 | |
95 | static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag) | |
96 | { | |
97 | u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) | | |
98 | (tag & 0x07ffffff); | |
99 | ||
919ca868 | 100 | _ppc_msgsnd(msg); |
620165f9 KG |
101 | } |
102 | ||
103 | #endif /* _ASM_POWERPC_DBELL_H */ |