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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/include/kernel/intmsghandler.H $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* COPYRIGHT International Business Machines Corp. 2011,2014 */
/* */
/* 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 */
#ifndef __KERNEL_INTERRUPTMSGHDLR_H
#define __KERNEL_INTERRUPTMSGHDLR_H
#include <stdint.h>
#include <kernel/types.h>
#include <kernel/msghandler.H>
#include <kernel/msg.H>
#include <builtins.h>
/**
* @class InterruptMsgHdlr
* @brief Class to handle sending a message to user space for
* an External Interrupt.
*
* This class extends from the base MessageHandler so the base send/receive
* message functions can be utilized. It overrides how to handle the message
* responses
*/
class InterruptMsgHdlr : public MessageHandler
{
public:
/**
* Field values for P8
* @note This is used to calculate the mmio address offset
* from the PIR for the interrupt presenter memory mapped registers.
* The masks isolate the node,chip,core, and thread id fields in the
* PIR. The LSL values tell how far left a PIR field needs to be
* shifted to create a proper mmio offset address.
*
*/
enum
{
P8_PIR_THREADID_MSK = 0x00000007,
P8_PIR_COREID_MSK = 0x00000078,
P8_PIR_CHIPID_MSK = 0x00000380,
P8_PIR_NODEID_MSK = 0x00001C00,
// Logical Shift Left fields for mmio Base address from PIR.
// (IP addr bit pos - PIR bit pos)
P8_IP_THREADID_LSL = (12-0),
P8_IP_COREID_LSL = (15-3),
P8_IP_CHIPID_LSL = (20-7),
P8_IP_NODEID_LSL = (22-10),
XIRR_ADDR_OFFSET = 4,
MFRR_ADDR_OFFSET = 12,
INTP_BAR_VALUE = 0xFFFFE000, // upper 32 bits of IPCBAR
INTERPROC_XISR = 2, //IPI XISR is 2
};
/**
* Constructor
*/
InterruptMsgHdlr(MessageQueue * i_msgQ)
: MessageHandler(&iv_lock,i_msgQ), iv_lock() {}
/**
* Destructor.
*/
virtual ~InterruptMsgHdlr() {};
/**
* Handle response to 'send message'
*
* @param[in] i_type - The message type previously sent.
* @param[in] i_key - The key value for the received message.
* @param[in] i_task - The deferred task.
* @param[in] i_rc - The response rc from userspace.
*
* @return HandleResult - The desired behavior on the 'recv message'
* interface for this <key, task> pair.
*/
virtual HandleResult handleResponse(msg_sys_types_t i_type,void* i_key,
task_t* i_task,int i_rc);
ALWAYS_INLINE
static uint64_t mmio_offset(uint64_t i_pir)
{
uint64_t offset = 0;
// The PIR chip id field has 1 extra bit (8 chips), so we need
// to shift the node and chip separately
offset |=
(i_pir & P8_PIR_NODEID_MSK) << P8_IP_NODEID_LSL;
offset |=
(i_pir & P8_PIR_CHIPID_MSK) << P8_IP_CHIPID_LSL;
// The core and thread id field are adjacent in both the PIR and
// the mmio offset, so they can be done in one shift operation.
offset |=
(i_pir & (P8_PIR_COREID_MSK | P8_PIR_THREADID_MSK))
<< P8_IP_THREADID_LSL;
return offset;
}
/**
* Create the InterruptMsgHdlr to handle external interrupts
* @param[in] i_msgQ The message queue
* @param[in] i_ipc_addr The base address of the IPC registers
*/
static void create(MessageQueue * i_msgQ, uint64_t i_ipc_addr);
/**
* Handle an external interrupt from HW
*/
static void handleInterrupt();
/**
* Add cpu core - set up the external interrupt registers
* @param[in] i_pir The cpu id of the core to to set-up
* @note should be called when ever a new core becomes active
*/
static void addCpuCore(uint64_t i_pir);
/**
* Issue an IPI to the core.
*
* @param[in] i_pir - The PIR of the CPU to send IPI at.
* @param[in] i_favor - How favored the interrupt is; 0 = most favored
* 254 = least favored, 255 = no interrupt
* Default 0x1 - IPI from kernel side (wakeup)
*/
static void sendIPI(uint64_t i_pir, uint8_t i_favor = 0x1);
/**
* Issue the sbe/mailbox workaround (issue a mbox EOI to mailbox)
*
*/
static void issueSbeMboxWA();
private:
static InterruptMsgHdlr * cv_instance;
static uint64_t cv_ipc_base_address;
Spinlock iv_lock;
};
#endif
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