leon2_amba_bus.h

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/* SPDX-License-Identifier: BSD-2-Clause */

 
/*
 *  COPYRIGHT (c) 2008.
 *  Cobham Gaisler AB.
 *
 *  Bus driver for a hardcoded setup. LEON2 systems have some
 *  cores always present, here called "Standard Cores". In 
 *  addtion to the standard cores there are often extra cores
 *  that can be defined using the "Custom Cores" mechanism.
 *
 *  A Core is described by assigning a base register and 
 *  IRQ0..IRQ15 using the leon2_core structure.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef __LEON2_AMBA_BUS_H__
#define __LEON2_AMBA_BUS_H__
 
/*** Cores location and IRQs hardcoded ***/
 
#include <drvmgr/drvmgr.h>
#include <grlib/ambapp.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
/* LEON2 AMBA Driver ID generation */
#define DRIVER_LEON2_AMBA(id)   DRIVER_ID(DRVMGR_BUS_TYPE_LEON2_AMBA, id)
 
/* LEON2 Cores (any unique 48-bit number will do) */
#define LEON2_AMBA_NONE_ID      0
#define LEON2_AMBA_TIMER_ID     1
#define LEON2_AMBA_UART_ID      2
#define LEON2_AMBA_GPIO_ID      3
#define LEON2_AMBA_IRQCTRL_ID       4
 
#define LEON2_AMBA_AT697PCI_ID      100
#define LEON2_AMBA_AMBAPP_ID        0xfff0
 
/* LEON2 driver IDs */
#define DRIVER_LEON2_AMBA_TIMER     DRIVER_LEON2_AMBA(LEON2_AMBA_TIMER_ID)
#define DRIVER_LEON2_AMBA_UART      DRIVER_LEON2_AMBA(LEON2_AMBA_UART_ID)
#define DRIVER_LEON2_AMBA_AT697PCI  DRIVER_LEON2_AMBA(LEON2_AMBA_AT697PCI_ID)
#define DRIVER_LEON2_AMBA_AMBAPP    DRIVER_LEON2_AMBA(LEON2_AMBA_AMBAPP_ID)
 
struct leon2_amba_dev_id {
    unsigned short      core_id;
};
 
#define EMPTY_LEON2_CORE {{LEON2_AMBA_NONE_ID}, NULL, NULL}
struct leon2_core {
    struct leon2_amba_dev_id    id; /* Core ID */
    char                *name;  /* Name of Core */
    struct drvmgr_key       *keys;  /* Core setup (location, IRQs) */
};
 
struct leon2_bus {
    struct leon2_core       *std_cores; /* The LEON2 standard cores */
    struct leon2_core       *custom_cores;  /* Custom cores on the same bus */
    struct drvmgr_map_entry     *maps_up;   /* Memory map ip-stream */
    struct drvmgr_map_entry     *maps_down; /* Memory map down-stream */
};
 
extern struct leon2_core leon2_std_cores[];
 
/* Data structure drivers can access */
struct leon2_amba_dev_info {
    unsigned short      core_id;    /* Core ID */
    unsigned int        reg_base;   /* Register base */
    char            irqs[16];   /* 16 irqs */
};
 
struct leon2_amba_drv_info {
    struct drvmgr_drv   general;    /* General bus info */
    /* AMBA specific bus information */
    struct leon2_amba_dev_id    *ids;       /* Supported hardware */
};
 
/* Initialize LEON2 bus with a configuration 
 *  bus_config   -   What cores, their location and irqs
 *  resources    -   Driver configuration for the cores specified bus_config
 */
int leon2_root_register(
    struct leon2_bus *bus_config,
    struct drvmgr_bus_res *resources);
 
#ifdef __cplusplus
}
#endif
 
#endif