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b866cc2199
Change the doorbell callers to know about their msgsnd addressing, rather than have them set a per-cpu target data tag at boot that gets sent to the cause_ipi functions. The data is only used for doorbell IPI functions, no other IPI types, so it makes sense to keep that detail local to doorbell. Have the platform code understand doorbell IPIs, rather than the interrupt controller code understand them. Platform code can look at capabilities it has available and decide which to use. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/*
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* Copyright 2009 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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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/cpu_has_feature.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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if (cpu_has_feature(CPU_FTR_HVMODE))
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__asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
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else
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__asm__ __volatile__ (PPC_MSGSNDP(%0) : : "r" (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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#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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