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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/include/kernel/ipc.H $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2013,2018 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
#if !defined(__IPC_H)
#define __IPC_H
#include <sys/msg.h>
#include <sys/internode.h>
#define IPC_DATA_AREA_LOCKED 0xFFFFFFFFFFFFFFFFul
#define IPC_DATA_AREA_READ 0xFFFFFFFFFFFFFFFEul
#define IPC_DATA_AREA_CLEAR 0
namespace KernelIpc
{
/** @fn send()
* @brief Send an IPC message to a remote node
*
* @param[in] i_q - message queue
* @param[in] i_msg - message
*
* @note
*/
int send(uint64_t i_q, msg_t * i_msg);
/** @fn updateRemoteIpcAddr()
* @brief update the Remote Address used to send IPC
* messages to the specified node
*
* @param[in] i_node - node
* @param[in] i_remoteAddr - IPC address of Remote Node's ipc_data_area
*
* @note
*/
int updateRemoteIpcAddr(uint64_t i_node, uint64_t i_remoteAddr);
/** @fn qryLocalIpcInfo()
* @brief query the node and remote address other nodes will use to
* send messages to this IPC instance.
*
* @param[in] i_pONode - buffer the node will be returned in
* @param[in] i_pOAddr - buffer the address will be returned in
*
* @note
*/
int qryLocalIpcInfo(uint64_t * i_pONode, uint64_t * i_pOAddr);
struct ipc_data_area_t
{
uint64_t msg_queue_id;
msg_t msg_payload;
uint64_t hrmor_base;
uint32_t pir;
struct ipc_data_area_t *
remote_ipc_data_addr[internode_info_vals_t::MAX_NODES_PER_SYS];
};
/**
* This structure maps an IPC data area needed by start_payload that is common
* to all HB instances.
* @note Don't change the order or size of this structure
* w/o also changing src/kernel/shutdown.S
*/
struct start_payload_data_area_t
{
/** barriers needed in shutdown.S - see src/kernel/shutdown.S
* barrier[0] blocks until all nodes have reported cpu/node_count
* barrier[1] blocks until safe to update HRMOR on master
* barrier[2] blocks until HRMORs updated
* barrier[3] blocks until SLBs, ERATs etc. cleared
* barrier[4] blocks until all CPUs have jumpted to payload except the
* one with the lowest PIR
*/
uint64_t barrier[5];
uint64_t lowest_PIR; //!< Lowest cpu PIR in entire system (all nodes)
uint64_t cpu_count; //!< Total number of cpu threads in entire system
uint64_t node_count; //!< Total number of nodes in entire system
};
extern ipc_data_area_t ipc_data_area;
extern start_payload_data_area_t start_payload_data_area;
};
#endif
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