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
23 struct 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 struct mcip_bcr {
59 #ifdef CONFIG_CPU_BIG_ENDIAN
60 unsigned int pad3:8,
61 idu:1, llm:1, num_cores:6,
62 iocoh:1, gfrc:1, dbg:1, pad2:1,
63 msg:1, sem:1, ipi:1, pad:1,
64 ver:8;
65 #else
66 unsigned int ver:8,
67 pad:1, ipi:1, sem:1, msg:1,
68 pad2:1, dbg:1, gfrc:1, iocoh:1,
69 num_cores:6, llm:1, idu:1,
70 pad3:8;
71 #endif
72 };
73
74 /*
75 * MCIP programming model
76 *
77 * - Simple commands write {cmd:8,param:16} to MCIP_CMD aux reg
78 * (param could be irq, common_irq, core_id ...)
79 * - More involved commands setup MCIP_WDATA with cmd specific data
80 * before invoking the simple command
81 */
__mcip_cmd(unsigned int cmd,unsigned int param)82 static inline void __mcip_cmd(unsigned int cmd, unsigned int param)
83 {
84 struct mcip_cmd buf;
85
86 buf.pad = 0;
87 buf.cmd = cmd;
88 buf.param = param;
89
90 WRITE_AUX(ARC_REG_MCIP_CMD, buf);
91 }
92
93 /*
94 * Setup additional data for a cmd
95 * Callers need to lock to ensure atomicity
96 */
__mcip_cmd_data(unsigned int cmd,unsigned int param,unsigned int data)97 static inline void __mcip_cmd_data(unsigned int cmd, unsigned int param,
98 unsigned int data)
99 {
100 write_aux_reg(ARC_REG_MCIP_WDATA, data);
101
102 __mcip_cmd(cmd, param);
103 }
104
105 #endif
106
107 #endif
108