| Vineet Gupta | 82fea5a | 2014-09-10 19:05:38 +0530 | [diff] [blame] | 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_IDU_ENABLE 0x71 |
| 43 | #define CMD_IDU_DISABLE 0x72 |
| 44 | #define CMD_IDU_SET_MODE 0x74 |
| 45 | #define CMD_IDU_SET_DEST 0x76 |
| 46 | #define CMD_IDU_SET_MASK 0x7C |
| 47 | |
| 48 | #define IDU_M_TRIG_LEVEL 0x0 |
| 49 | #define IDU_M_TRIG_EDGE 0x1 |
| 50 | |
| 51 | #define IDU_M_DISTRI_RR 0x0 |
| 52 | #define IDU_M_DISTRI_DEST 0x2 |
| 53 | }; |
| 54 | |
| 55 | /* |
| 56 | * MCIP programming model |
| 57 | * |
| 58 | * - Simple commands write {cmd:8,param:16} to MCIP_CMD aux reg |
| 59 | * (param could be irq, common_irq, core_id ...) |
| 60 | * - More involved commands setup MCIP_WDATA with cmd specific data |
| 61 | * before invoking the simple command |
| 62 | */ |
| 63 | static inline void __mcip_cmd(unsigned int cmd, unsigned int param) |
| 64 | { |
| 65 | struct mcip_cmd buf; |
| 66 | |
| 67 | buf.pad = 0; |
| 68 | buf.cmd = cmd; |
| 69 | buf.param = param; |
| 70 | |
| 71 | WRITE_AUX(ARC_REG_MCIP_CMD, buf); |
| 72 | } |
| 73 | |
| 74 | /* |
| 75 | * Setup additional data for a cmd |
| 76 | * Callers need to lock to ensure atomicity |
| 77 | */ |
| 78 | static inline void __mcip_cmd_data(unsigned int cmd, unsigned int param, |
| 79 | unsigned int data) |
| 80 | { |
| 81 | write_aux_reg(ARC_REG_MCIP_WDATA, data); |
| 82 | |
| 83 | __mcip_cmd(cmd, param); |
| 84 | } |
| 85 | |
| 86 | extern void mcip_init_early_smp(void); |
| 87 | extern void mcip_init_smp(unsigned int cpu); |
| 88 | |
| 89 | #endif |
| 90 | |
| 91 | #endif |