LXR linux/arch/arc/include/asm/mcip.h

   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
  92