tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/cpu_has_feature.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
26enum 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#define SPRN_DOORBELL_CPUTAG SPRN_TIR
39#define PPC_DBELL_TAG_MASK 0x7f
40
41static inline void _ppc_msgsnd(u32 msg)
42{
43 if (cpu_has_feature(CPU_FTR_HVMODE))
44 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
45 else
46 __asm__ __volatile__ (PPC_MSGSNDP(%0) : : "r" (msg));
47}
48
49#else /* CONFIG_PPC_BOOK3S */
50
51#define PPC_DBELL_MSGTYPE PPC_DBELL
52#define SPRN_DOORBELL_CPUTAG SPRN_PIR
53#define PPC_DBELL_TAG_MASK 0x3fff
54
55static inline void _ppc_msgsnd(u32 msg)
56{
57 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
58}
59
60#endif /* CONFIG_PPC_BOOK3S */
61
62extern void doorbell_cause_ipi(int cpu, unsigned long data);
63extern void doorbell_exception(struct pt_regs *regs);
64extern void doorbell_setup_this_cpu(void);
65
66static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag)
67{
68 u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) |
69 (tag & 0x07ffffff);
70
71 _ppc_msgsnd(msg);
72}
73
74#endif /* _ASM_POWERPC_DBELL_H */