soc: Support for EZchip SoC

/*

 * Copyright (c) 2016, Mellanox Technologies. All rights reserved.

 *

 * This software is available to you under a choice of one of two

 * licenses.  You may choose to be licensed under the terms of the GNU

 * General Public License (GPL) Version 2, available from the file

 * COPYING in the main directory of this source tree, or the

 * OpenIB.org BSD license below:

 *

 *     Redistribution and use in source and binary forms, with or

 *     without modification, are permitted provided that the following

 *     conditions are met:

 *

 *      - Redistributions of source code must retain the above

 *        copyright notice, this list of conditions and the following

 *        disclaimer.

 *

 *      - Redistributions in binary form must reproduce the above

 *        copyright notice, this list of conditions and the following

 *        disclaimer in the documentation and/or other materials

 *        provided with the distribution.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 */

#ifndef SOC_NPS_COMMON_H

#define SOC_NPS_COMMON_H

#ifdef CONFIG_SMP

#define NPS_IPI_IRQ					5

#endif

#define NPS_HOST_REG_BASE			0xF6000000

#define NPS_MSU_BLKID				0x018

#define CTOP_INST_RSPI_GIC_0_R12		0x3C56117E

#define CTOP_INST_MOV2B_FLIP_R3_B1_B2_INST	0x5B60

#define CTOP_INST_MOV2B_FLIP_R3_B1_B2_LIMM	0x00010422

#ifndef __ASSEMBLY__

/* In order to increase compilation test coverage */

#ifdef CONFIG_ARC

static inline void nps_ack_gic(void)

{

	__asm__ __volatile__ (

	"       .word %0\n"

	:

	: "i"(CTOP_INST_RSPI_GIC_0_R12)

	: "memory");

}

#else

static inline void nps_ack_gic(void) { }

#define write_aux_reg(r, v)

#define read_aux_reg(r) 0

#endif

/* CPU global ID */

struct global_id {

	union {

		struct {

#ifdef CONFIG_EZNPS_MTM_EXT

			u32 __reserved:20, cluster:4, core:4, thread:4;

#else

			u32 __reserved:24, cluster:4, core:4;

#endif

		};

		u32 value;

	};

};

/*

 * Convert logical to physical CPU IDs

 *

 * The conversion swap bits 1 and 2 of cluster id (out of 4 bits)

 * Now quad of logical clusters id's are adjacent physically,

 * and not like the id's physically came with each cluster.

 * Below table is 4x4 mesh of core clusters as it layout on chip.

 * Cluster ids are in format: logical (physical)

 *

 *    -----------------   ------------------

 * 3 |  5 (3)   7 (7)  | | 13 (11)   15 (15)|

 *

 * 2 |  4 (2)   6 (6)  | | 12 (10)   14 (14)|

 *    -----------------   ------------------

 * 1 |  1 (1)   3 (5)  | |  9  (9)   11 (13)|

 *

 * 0 |  0 (0)   2 (4)  | |  8  (8)   10 (12)|

 *    -----------------   ------------------

 *       0       1            2        3

 */

static inline int nps_cluster_logic_to_phys(int cluster)

{

#ifdef __arc__

	 __asm__ __volatile__(

	"       mov r3,%0\n"

	"       .short %1\n"

	"       .word %2\n"

	"       mov %0,r3\n"

	: "+r"(cluster)

	: "i"(CTOP_INST_MOV2B_FLIP_R3_B1_B2_INST),

	  "i"(CTOP_INST_MOV2B_FLIP_R3_B1_B2_LIMM)

	: "r3");

#endif

	return cluster;

}

#define NPS_CPU_TO_CLUSTER_NUM(cpu) \

	({ struct global_id gid; gid.value = cpu; \

		nps_cluster_logic_to_phys(gid.cluster); })

struct nps_host_reg_address {

	union {

		struct {

			u32 base:8, cl_x:4, cl_y:4,

			blkid:6, reg:8, __reserved:2;

		};

		u32 value;

	};

};

struct nps_host_reg_address_non_cl {

	union {

		struct {

			u32 base:7, blkid:11, reg:12, __reserved:2;

		};

		u32 value;

	};

};

static inline void *nps_host_reg_non_cl(u32 blkid, u32 reg)

{

	struct nps_host_reg_address_non_cl reg_address;

	reg_address.value = NPS_HOST_REG_BASE;

	reg_address.blkid = blkid;

	reg_address.reg = reg;

	return (void *)reg_address.value;

}

static inline void *nps_host_reg(u32 cpu, u32 blkid, u32 reg)

{

	struct nps_host_reg_address reg_address;

	u32 cl = NPS_CPU_TO_CLUSTER_NUM(cpu);

	reg_address.value = NPS_HOST_REG_BASE;

	reg_address.cl_x  = (cl >> 2) & 0x3;

	reg_address.cl_y  = cl & 0x3;

	reg_address.blkid = blkid;

	reg_address.reg   = reg;

	return (void *)reg_address.value;

}

#endif /* __ASSEMBLY__ */

#endif /* SOC_NPS_COMMON_H */