[mirror_ubuntu-eoan-kernel.git] / arch / powerpc / include / asm / dbell.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright 2009 Freescale Semiconductor, Inc.
 *
 * 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>
#include <asm/feature-fixups.h>

#define PPC_DBELL_MSG_BRDCAST	(0x04000000)
#define PPC_DBELL_TYPE(x)	(((x) & 0xf) << (63-36))
#define PPC_DBELL_TYPE_MASK	PPC_DBELL_TYPE(0xf)
#define PPC_DBELL_LPID(x)	((x) << (63 - 49))
#define PPC_DBELL_PIR_MASK	0x3fff
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 */
	PPC_DBELL_SERVER = 5,	/* doorbell on server */
};

#ifdef CONFIG_PPC_BOOK3S

#define PPC_DBELL_MSGTYPE		PPC_DBELL_SERVER

static inline void _ppc_msgsnd(u32 msg)
{
	__asm__ __volatile__ (ASM_FTR_IFSET(PPC_MSGSND(%1), PPC_MSGSNDP(%1), %0)
				: : "i" (CPU_FTR_HVMODE), "r" (msg));
}

/* sync before sending message */
static inline void ppc_msgsnd_sync(void)
{
	__asm__ __volatile__ ("sync" : : : "memory");
}

/* sync after taking message interrupt */
static inline void ppc_msgsync(void)
{
	/* sync is not required when taking messages from the same core */
	__asm__ __volatile__ (ASM_FTR_IFSET(PPC_MSGSYNC " ; lwsync", "", %0)
				: : "i" (CPU_FTR_HVMODE|CPU_FTR_ARCH_300));
}

static inline void _ppc_msgclr(u32 msg)
{
	__asm__ __volatile__ (ASM_FTR_IFSET(PPC_MSGCLR(%1), PPC_MSGCLRP(%1), %0)
				: : "i" (CPU_FTR_HVMODE), "r" (msg));
}

static inline void ppc_msgclr(enum ppc_dbell type)
{
	u32 msg = PPC_DBELL_TYPE(type);

	_ppc_msgclr(msg);
}

#else /* CONFIG_PPC_BOOK3S */

#define PPC_DBELL_MSGTYPE		PPC_DBELL

static inline void _ppc_msgsnd(u32 msg)
{
	__asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
}

/* sync before sending message */
static inline void ppc_msgsnd_sync(void)
{
	__asm__ __volatile__ ("sync" : : : "memory");
}

/* sync after taking message interrupt */
static inline void ppc_msgsync(void)
{
}

#endif /* CONFIG_PPC_BOOK3S */

extern void doorbell_global_ipi(int cpu);
extern void doorbell_core_ipi(int cpu);
extern int doorbell_try_core_ipi(int cpu);
extern void doorbell_exception(struct pt_regs *regs);

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);

	_ppc_msgsnd(msg);
}

#endif /* _ASM_POWERPC_DBELL_H */
Commit	Line	Data
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
620165f9 KG	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	};
620165f9 KG	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)
919ca868 IM	36	{
a5adf282 NP	37	__asm__ __volatile__ (ASM_FTR_IFSET(PPC_MSGSND(%1), PPC_MSGSNDP(%1), %0)
a5adf282 NP	38	: : "i" (CPU_FTR_HVMODE), "r" (msg));
919ca868 IM	39	}
919ca868 IM	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	}
b87ac021 NP	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 */
42d02b81 IM	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 */