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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright 2009 Freescale Semiconductor, Inc.
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*
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* provides masks and opcode images for use by code generation, emulation
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* and for instructions that older assemblers might not know about
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*/
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#ifndef _ASM_POWERPC_DBELL_H
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#define _ASM_POWERPC_DBELL_H
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#include <linux/smp.h>
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#include <linux/threads.h>
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#include <asm/ppc-opcode.h>
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#include <asm/feature-fixups.h>
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#define PPC_DBELL_MSG_BRDCAST (0x04000000)
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#define PPC_DBELL_TYPE(x) (((x) & 0xf) << (63-36))
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#define PPC_DBELL_TYPE_MASK PPC_DBELL_TYPE(0xf)
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#define PPC_DBELL_LPID(x) ((x) << (63 - 49))
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#define PPC_DBELL_PIR_MASK 0x3fff
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enum ppc_dbell {
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PPC_DBELL = 0, /* doorbell */
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PPC_DBELL_CRIT = 1, /* critical doorbell */
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PPC_G_DBELL = 2, /* guest doorbell */
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PPC_G_DBELL_CRIT = 3, /* guest critical doorbell */
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PPC_G_DBELL_MC = 4, /* guest mcheck doorbell */
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PPC_DBELL_SERVER = 5, /* doorbell on server */
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};
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#ifdef CONFIG_PPC_BOOK3S
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#define PPC_DBELL_MSGTYPE PPC_DBELL_SERVER
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static inline void _ppc_msgsnd(u32 msg)
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{
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__asm__ __volatile__ (ASM_FTR_IFSET(PPC_MSGSND(%1), PPC_MSGSNDP(%1), %0)
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: : "i" (CPU_FTR_HVMODE), "r" (msg));
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}
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/* sync before sending message */
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static inline void ppc_msgsnd_sync(void)
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{
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__asm__ __volatile__ ("sync" : : : "memory");
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}
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/* sync after taking message interrupt */
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static inline void ppc_msgsync(void)
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{
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/* sync is not required when taking messages from the same core */
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__asm__ __volatile__ (ASM_FTR_IFSET(PPC_MSGSYNC " ; lwsync", "", %0)
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: : "i" (CPU_FTR_HVMODE|CPU_FTR_ARCH_300));
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}
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static inline void _ppc_msgclr(u32 msg)
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{
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__asm__ __volatile__ (ASM_FTR_IFSET(PPC_MSGCLR(%1), PPC_MSGCLRP(%1), %0)
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: : "i" (CPU_FTR_HVMODE), "r" (msg));
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}
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static inline void ppc_msgclr(enum ppc_dbell type)
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{
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u32 msg = PPC_DBELL_TYPE(type);
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_ppc_msgclr(msg);
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}
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#else /* CONFIG_PPC_BOOK3S */
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#define PPC_DBELL_MSGTYPE PPC_DBELL
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static inline void _ppc_msgsnd(u32 msg)
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{
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__asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
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}
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/* sync before sending message */
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static inline void ppc_msgsnd_sync(void)
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{
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__asm__ __volatile__ ("sync" : : : "memory");
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}
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/* sync after taking message interrupt */
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static inline void ppc_msgsync(void)
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{
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}
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#endif /* CONFIG_PPC_BOOK3S */
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extern void doorbell_global_ipi(int cpu);
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extern void doorbell_core_ipi(int cpu);
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extern int doorbell_try_core_ipi(int cpu);
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extern void doorbell_exception(struct pt_regs *regs);
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static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag)
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{
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u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) |
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(tag & 0x07ffffff);
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_ppc_msgsnd(msg);
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}
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#endif /* _ASM_POWERPC_DBELL_H */
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