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 Semicondutor, 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
20#define PPC_DBELL_MSG_BRDCAST (0x04000000)
21#define PPC_DBELL_TYPE(x) (((x) & 0xf) << (63-36))
22#define PPC_DBELL_TYPE_MASK PPC_DBELL_TYPE(0xf)
23#define PPC_DBELL_LPID(x) ((x) << (63 - 49))
24#define PPC_DBELL_PIR_MASK 0x3fff
25enum ppc_dbell {
26 PPC_DBELL = 0, /* doorbell */
27 PPC_DBELL_CRIT = 1, /* critical doorbell */
28 PPC_G_DBELL = 2, /* guest doorbell */
29 PPC_G_DBELL_CRIT = 3, /* guest critical doorbell */
30 PPC_G_DBELL_MC = 4, /* guest mcheck doorbell */
31};
32
33extern void doorbell_cause_ipi(int cpu, unsigned long data);
34extern void doorbell_exception(struct pt_regs *regs);
35extern void doorbell_setup_this_cpu(void);
36
37static inline void ppc_msgsnd(enum ppc_dbell type, u32 flags, u32 tag)
38{
39 u32 msg = PPC_DBELL_TYPE(type) | (flags & PPC_DBELL_MSG_BRDCAST) |
40 (tag & 0x07ffffff);
41
42 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
43}
44
45#endif /* _ASM_POWERPC_DBELL_H */