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/*
* Copyright 2009 Freescale Semicondutor, Inc.
*
* 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.
*
* provides masks and opcode images for use by code generation, emulation
* and for instructions that older assemblers might not know about
*/
#ifndef _ASM_POWERPC_DBELL_H
#define _ASM_POWERPC_DBELL_H
#include <linux/smp.h>
#include <linux/threads.h>
#include <asm/ppc-opcode.h>
#define PPC_DBELL_MSG_BRDCAST (0x04000000)
#define PPC_DBELL_TYPE(x) (((x) & 0xf) << 28)
enum ppc_dbell {
PPC_DBELL = 0, /* doorbell */
PPC_DBELL_CRIT = 1, /* critical doorbell */
PPC_G_DBELL = 2, /* guest doorbell */
PPC_G_DBELL_CRIT = 3, /* guest critical doorbell */
PPC_G_DBELL_MC = 4, /* guest mcheck doorbell */
};
extern void doorbell_message_pass(int cpu, int msg);
extern void doorbell_exception(struct pt_regs *regs);
extern void doorbell_check_self(void);
extern void doorbell_setup_this_cpu(void);
static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag)
{
u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) |
(tag & 0x07ffffff);
__asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
}
#endif /* _ASM_POWERPC_DBELL_H */
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