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/* Copyright 2017 IBM 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.
*/
#define pr_fmt(fmt) "SBE: " fmt
#include <chip.h>
#include <errorlog.h>
#include <lock.h>
#include <opal.h>
#include <sbe-p9.h>
#include <skiboot.h>
#include <timebase.h>
#include <timer.h>
#include <trace.h>
#include <xscom.h>
void sbe_interrupt(uint32_t chip_id)
{
int rc;
u64 data;
struct proc_chip *chip;
chip = get_chip(chip_id);
if (chip == NULL)
return;
/* Read doorbell register */
rc = xscom_read(chip_id, PSU_HOST_DOORBELL_REG_RW, &data);
if (rc) {
prlog(PR_ERR, "Failed to read SBE to Host doorbell register "
"[chip id = %x]\n", chip_id);
goto clr_interrupt;
}
/* SBE passtrhough command, call prd handler */
if (data & SBE_HOST_PASSTHROUGH) {
prd_sbe_passthrough(chip_id);
}
clr_interrupt:
/* Clears all the bits */
rc = xscom_write(chip_id, PSU_HOST_DOORBELL_REG_AND,
SBE_HOST_RESPONSE_CLEAR);
if (rc) {
prlog(PR_ERR, "Failed to clear SBE to Host doorbell "
"register [chip id = %x]\n", chip_id);
}
}
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