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/* Copyright 2018 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.
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <inttypes.h>
#include "target.h"
#include "bitutils.h"
/* XBus addressing is more complicated. This comes from p9_scominfo.C
* in the ekb. */
static uint64_t xbus_translate(struct xbus *xbus, uint64_t addr)
{
uint64_t ring = (addr >> 10) & 0xf;
if (ring >= 0x3 && ring <= 0x5)
addr = SETFIELD(PPC_BITMASK(50, 53), addr, 0x3 + xbus->ring_id);
else if (ring >= 0x6 && ring <= 8)
addr = SETFIELD(PPC_BITMASK(50, 53), addr, 0x6 + xbus->ring_id);
return addr;
}
static int xbus_probe(struct pdbg_target *target)
{
struct xbus *xbus = target_to_xbus(target);
if (pdbg_target_u32_property(&xbus->target, "ring-id", &xbus->ring_id)) {
printf("Unknown ring-id on %s@%d\n", pdbg_target_name(&xbus->target),
pdbg_target_index(&xbus->target));
return -1;
}
return 0;
}
struct xbus p9_xbus = {
.target = {
.name = "POWER9 XBus",
.compatible = "ibm,xbus",
.class = "xbus",
.probe = xbus_probe,
.translate = translate_cast(xbus_translate),
},
};
DECLARE_HW_UNIT(p9_xbus);
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