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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* ARConnect IP Support (Multi core enabler: Cross core IPI, RTC ...)
*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
*/
#ifndef __SOC_ARC_MCIP_H
#define __SOC_ARC_MCIP_H
#include <soc/arc/aux.h>
#define ARC_REG_MCIP_BCR 0x0d0
#define ARC_REG_MCIP_IDU_BCR 0x0D5
#define ARC_REG_GFRC_BUILD 0x0D6
#define ARC_REG_MCIP_CMD 0x600
#define ARC_REG_MCIP_WDATA 0x601
#define ARC_REG_MCIP_READBACK 0x602
struct mcip_cmd {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int pad:8, param:16, cmd:8;
#else
unsigned int cmd:8, param:16, pad:8;
#endif
#define CMD_INTRPT_GENERATE_IRQ 0x01
#define CMD_INTRPT_GENERATE_ACK 0x02
#define CMD_INTRPT_READ_STATUS 0x03
#define CMD_INTRPT_CHECK_SOURCE 0x04
/* Semaphore Commands */
#define CMD_SEMA_CLAIM_AND_READ 0x11
#define CMD_SEMA_RELEASE 0x12
#define CMD_DEBUG_SET_MASK 0x34
#define CMD_DEBUG_READ_MASK 0x35
#define CMD_DEBUG_SET_SELECT 0x36
#define CMD_DEBUG_READ_SELECT 0x37
#define CMD_GFRC_READ_LO 0x42
#define CMD_GFRC_READ_HI 0x43
#define CMD_GFRC_SET_CORE 0x47
#define CMD_GFRC_READ_CORE 0x48
#define CMD_IDU_ENABLE 0x71
#define CMD_IDU_DISABLE 0x72
#define CMD_IDU_SET_MODE 0x74
#define CMD_IDU_READ_MODE 0x75
#define CMD_IDU_SET_DEST 0x76
#define CMD_IDU_ACK_CIRQ 0x79
#define CMD_IDU_SET_MASK 0x7C
#define IDU_M_TRIG_LEVEL 0x0
#define IDU_M_TRIG_EDGE 0x1
#define IDU_M_DISTRI_RR 0x0
#define IDU_M_DISTRI_DEST 0x2
};
struct mcip_bcr {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int pad4:6, pw_dom:1, pad3:1,
idu:1, pad2:1, num_cores:6,
pad:1, gfrc:1, dbg:1, pw:1,
msg:1, sem:1, ipi:1, slv:1,
ver:8;
#else
unsigned int ver:8,
slv:1, ipi:1, sem:1, msg:1,
pw:1, dbg:1, gfrc:1, pad:1,
num_cores:6, pad2:1, idu:1,
pad3:1, pw_dom:1, pad4:6;
#endif
};
struct mcip_idu_bcr {
#ifdef CONFIG_CPU_BIG_ENDIAN
unsigned int pad:21, cirqnum:3, ver:8;
#else
unsigned int ver:8, cirqnum:3, pad:21;
#endif
};
/*
* Build register for IDU contains not an actual number of supported common
* interrupts but an exponent of 2 which must be multiplied by 4 to
* get a number of supported common interrupts.
*/
#define mcip_idu_bcr_to_nr_irqs(bcr) (4 * (1 << (bcr).cirqnum))
/*
* MCIP programming model
*
* - Simple commands write {cmd:8,param:16} to MCIP_CMD aux reg
* (param could be irq, common_irq, core_id ...)
* - More involved commands setup MCIP_WDATA with cmd specific data
* before invoking the simple command
*/
static inline void __mcip_cmd(unsigned int cmd, unsigned int param)
{
struct mcip_cmd buf;
buf.pad = 0;
buf.cmd = cmd;
buf.param = param;
WRITE_AUX(ARC_REG_MCIP_CMD, buf);
}
/*
* Setup additional data for a cmd
* Callers need to lock to ensure atomicity
*/
static inline void __mcip_cmd_data(unsigned int cmd, unsigned int param,
unsigned int data)
{
write_aux_reg(ARC_REG_MCIP_WDATA, data);
__mcip_cmd(cmd, param);
}
/*
* Read MCIP register
*/
static inline unsigned int __mcip_cmd_read(unsigned int cmd, unsigned int param)
{
__mcip_cmd(cmd, param);
return read_aux_reg(ARC_REG_MCIP_READBACK);
}
#endif