linux/include/soc/nps/common.h

/*
 * 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 */