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_GFRC_READ_LO		0x42
43#define CMD_GFRC_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
89#endif
90
91#endif