tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * ARConnect IP Support (Multi core enabler: Cross core IPI, RTC ...)
3 *
4 * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#ifndef __ASM_MCIP_H
12#define __ASM_MCIP_H
13
14#ifdef CONFIG_ISA_ARCV2
15
16#include <asm/arcregs.h>
17
18#define ARC_REG_MCIP_BCR 0x0d0
19#define ARC_REG_MCIP_CMD 0x600
20#define ARC_REG_MCIP_WDATA 0x601
21#define ARC_REG_MCIP_READBACK 0x602
22
23struct mcip_cmd {
24#ifdef CONFIG_CPU_BIG_ENDIAN
25 unsigned int pad:8, param:16, cmd:8;
26#else
27 unsigned int cmd:8, param:16, pad:8;
28#endif
29
30#define CMD_INTRPT_GENERATE_IRQ 0x01
31#define CMD_INTRPT_GENERATE_ACK 0x02
32#define CMD_INTRPT_READ_STATUS 0x03
33#define CMD_INTRPT_CHECK_SOURCE 0x04
34
35/* Semaphore Commands */
36#define CMD_SEMA_CLAIM_AND_READ 0x11
37#define CMD_SEMA_RELEASE 0x12
38
39#define CMD_DEBUG_SET_MASK 0x34
40#define CMD_DEBUG_SET_SELECT 0x36
41
42#define CMD_GRTC_READ_LO 0x42
43#define CMD_GRTC_READ_HI 0x43
44
45#define CMD_IDU_ENABLE 0x71
46#define CMD_IDU_DISABLE 0x72
47#define CMD_IDU_SET_MODE 0x74
48#define CMD_IDU_SET_DEST 0x76
49#define CMD_IDU_SET_MASK 0x7C
50
51#define IDU_M_TRIG_LEVEL 0x0
52#define IDU_M_TRIG_EDGE 0x1
53
54#define IDU_M_DISTRI_RR 0x0
55#define IDU_M_DISTRI_DEST 0x2
56};
57
58/*
59 * MCIP programming model
60 *
61 * - Simple commands write {cmd:8,param:16} to MCIP_CMD aux reg
62 * (param could be irq, common_irq, core_id ...)
63 * - More involved commands setup MCIP_WDATA with cmd specific data
64 * before invoking the simple command
65 */
66static inline void __mcip_cmd(unsigned int cmd, unsigned int param)
67{
68 struct mcip_cmd buf;
69
70 buf.pad = 0;
71 buf.cmd = cmd;
72 buf.param = param;
73
74 WRITE_AUX(ARC_REG_MCIP_CMD, buf);
75}
76
77/*
78 * Setup additional data for a cmd
79 * Callers need to lock to ensure atomicity
80 */
81static inline void __mcip_cmd_data(unsigned int cmd, unsigned int param,
82 unsigned int data)
83{
84 write_aux_reg(ARC_REG_MCIP_WDATA, data);
85
86 __mcip_cmd(cmd, param);
87}
88
89extern void mcip_init_early_smp(void);
90extern void mcip_init_smp(unsigned int cpu);
91
92#endif
93
94#endif