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/*
* Copyright (c) 2015 Freescale Semiconductor, Inc. All rights reserved.
*
* 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.
* 3. Neither the name of Freescale Semiconductor nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 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 HOLDER 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.
*/
/**************************************************************************
* FILE NAME
*
* platform_info.c
*
* DESCRIPTION
*
* This file implements APIs to get platform specific
* information for OpenAMP.
*
**************************************************************************/
#include "platform.h"
#include "rpmsg/rpmsg.h"
/* Reference implementation that show cases platform_get_cpu_info and
platform_get_for_firmware API implementation for Bare metal environment */
extern struct hil_platform_ops proc_ops;
/*
* Number of buffers per VirtIO queue
*/
#define RPMSG_NUM_BUFS 256
/*
* Linux requires the ALIGN to 0x1000(4KB) instead of 0x80
*/
#define VRING_ALIGN 0x1000
/*
* Linux has a different alignment requirement, and its have 512 buffers instead of 32 buffers for the 2 ring
*/
#define VRING0_BASE 0x8FFF0000
#define VRING1_BASE 0x8FFF8000
/* IPI_VECT here defines VRING index in MU */
#define VRING0_IPI_VECT 0
#define VRING1_IPI_VECT 1
#define MASTER_CPU_ID 0
#define REMOTE_CPU_ID 1
/**
* This array provides definition of CPU nodes for master and remote
* context. It contains two nodes because the same file is intended
* to use with both master and remote configurations. On zynq platform
* only one node definition is required for master/remote as there
* are only two cores present in the platform.
*
* Only platform specific info is populated here. Rest of information
* is obtained during resource table parsing.The platform specific
* information includes;
*
* -CPU ID
* -Shared Memory
* -Interrupts
* -Channel info.
*
* Although the channel info is not platform specific information
* but it is convenient to keep it in HIL so that user can easily
* provide it without modifying the generic part.
*
* It is good idea to define hil_proc structure with platform
* specific fields populated as this can be easily copied to hil_proc
* structure passed as parameter in platform_get_processor_info. The
* other option is to populate the required structures individually
* and copy them one by one to hil_proc structure in platform_get_processor_info
* function. The first option is adopted here.
*
*
* 1) First node in the array is intended for the remote contexts and it
* defines Master CPU ID, shared memory, interrupts info, number of channels
* and there names. This node defines only one channel
* "rpmsg-data-channel".
*
* 2)Second node is required by the master and it defines remote CPU ID,
* shared memory and interrupts info. In general no channel info is required by the
* Master node, however in bare-metal master and linux remote case the linux
* rpmsg bus driver behaves as master so the rpmsg driver on linux side still needs
* channel info. This information is not required by the masters for bare-metal
* remotes.
*
*/
struct hil_proc proc_table []=
{
/* CPU node for remote context */
{
/* CPU ID of master */
MASTER_CPU_ID,
/* Shared memory info - Last field is not used currently */
{
(void*)SHM_ADDR, SHM_SIZE, 0x00
},
/* VirtIO device info */ /*struct proc_vdev*/
{
2, (1<<VIRTIO_RPMSG_F_NS), 0, /*num_vring, dfeatures, gfeatures*/
/* Vring info */ /*struct proc_vring*/
{
/*[0]*/
{ /* TX */
NULL, (void*)VRING0_BASE/*phy_addr*/, RPMSG_NUM_BUFS/*num_descs*/, VRING_ALIGN/*align*/,
/*struct virtqueue, phys_addr, num_descs, align*/
{
/*struct proc_intr*/
VRING0_IPI_VECT,0,0,NULL
}
},
/*[1]*/
{ /* RX */
NULL, (void*)VRING1_BASE, RPMSG_NUM_BUFS, VRING_ALIGN,
{
VRING1_IPI_VECT,0,0,NULL
}
}
}
},
/* Number of RPMSG channels */
1, /*num_chnls*/
/* RPMSG channel info - Only channel name is expected currently */
{
{"rpmsg-openamp-demo-channel"} /*chnl name*/
},
/* HIL platform ops table. */
&proc_ops, /*struct hil_platform_ops*/
/* Next three fields are for future use only */
0,
0,
NULL
},
/* CPU node for remote context */
{
/* CPU ID of remote */
REMOTE_CPU_ID,
/* Shared memory info - Last field is not used currently */
{
(void*)SHM_ADDR, SHM_SIZE, 0x00
},
/* VirtIO device info */
{
2, (1<<VIRTIO_RPMSG_F_NS), 0,
{
{/* RX */
NULL, (void*)VRING0_BASE, RPMSG_NUM_BUFS, VRING_ALIGN,
{
VRING0_IPI_VECT,0,0,NULL
}
},
{/* TX */
NULL, (void*)VRING1_BASE, RPMSG_NUM_BUFS, VRING_ALIGN,
{
VRING1_IPI_VECT,0,0,NULL
}
}
}
},
/* Number of RPMSG channels */
1,
/* RPMSG channel info - Only channel name is expected currently */
{
{"rpmsg-openamp-demo-channel"}
},
/* HIL platform ops table. */
&proc_ops,
/* Next three fields are for future use only */
0,
0,
NULL
}
};
/**
* platform_get_processor_info
*
* Copies the target info from the user defined data structures to
* HIL proc data structure.In case of remote contexts this function
* is called with the reserved CPU ID HIL_RSVD_CPU_ID, because for
* remotes there is only one master.
*
* @param proc - HIL proc to populate
* @param cpu_id - CPU ID
*
* return - status of execution
*/
int platform_get_processor_info(struct hil_proc *proc , int cpu_id)
{
int idx;
for(idx = 0; idx < sizeof(proc_table)/sizeof(struct hil_proc); idx++)
{
if((cpu_id == HIL_RSVD_CPU_ID) || (proc_table[idx].cpu_id == cpu_id))
{
env_memcpy(proc,&proc_table[idx], sizeof(struct hil_proc));
return 0;
}
}
return -1;
}
int platform_get_processor_for_fw(char *fw_name)
{
return 1;
}
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