| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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/feature-fixups.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 |
| 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 */ |
| 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 | |
| 39 | static 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 */ |
| 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 | { |
| 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 | |
| 59 | static 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 | |
| 65 | static 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 | |
| 76 | static inline void _ppc_msgsnd(u32 msg) |
| 77 | { |
| 78 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); |
| 79 | } |
| 80 | |
| 81 | /* sync before sending message */ |
| 82 | static inline void ppc_msgsnd_sync(void) |
| 83 | { |
| 84 | __asm__ __volatile__ ("sync" : : : "memory"); |
| 85 | } |
| 86 | |
| 87 | /* sync after taking message interrupt */ |
| 88 | static inline void ppc_msgsync(void) |
| 89 | { |
| 90 | } |
| 91 | |
| 92 | #endif /* CONFIG_PPC_BOOK3S */ |
| 93 | |
| 94 | extern void doorbell_global_ipi(int cpu); |
| 95 | extern void doorbell_core_ipi(int cpu); |
| 96 | extern int doorbell_try_core_ipi(int cpu); |
| 97 | extern void doorbell_exception(struct pt_regs *regs); |
| 98 | |
| 99 | static 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 */ |