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/* Copyright 2013-2014 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.
*/
#ifndef __CHIP_H
#define __CHIP_H
#include <stdint.h>
#include <lock.h>
#include <ccan/list/list.h>
/*
* Note on chip IDs:
*
* We carry a "chip_id" around, in the cpu_thread, but also as
* ibm,chip-id properties.
*
* This ID is the HW fabric ID of a chip based on the XSCOM numbering,
* also known as "GCID" (Global Chip ID).
*
* The format of this number is different between P7 and P8 and care must
* be taken when trying to convert between this chip ID and some other
* representation such as PIR values, interrupt-server numbers etc... :
*
* P7 GCID
* -------
*
* Global chip ID is a 6 bit number:
*
* NodeID T ChipID
* | | | |
* |___|___|___|___|___|___|
*
* Where T is the "torrent" bit and is 0 for P7 chips and 1 for
* directly XSCOM'able IO chips such as Torrent
*
* This macro converts a PIR to a GCID
*/
#define P7_PIR2GCID(pir) ({ \
uint32_t _pir = pir; \
((_pir >> 4) & 0x38) | ((_pir >> 5) & 0x3); })
#define P7_PIR2COREID(pir) (((pir) >> 2) & 0x7)
#define P7_PIR2THREADID(pir) ((pir) & 0x3)
/*
* P8 GCID
* -------
*
* Global chip ID is a 6 bit number:
*
* NodeID ChipID
* | | |
* |___|___|___|___|___|___|
*
* The difference with P7 is the absence of T bit, the ChipID
* is 3 bits long. The GCID is thus the same as the high bits
* if the PIR
*/
#define P8_PIR2GCID(pir) (((pir) >> 7) & 0x3f)
#define P8_PIR2COREID(pir) (((pir) >> 3) & 0xf)
#define P8_PIR2THREADID(pir) ((pir) & 0x7)
struct dt_node;
struct centaur_chip;
/* Chip type */
enum proc_chip_type {
PROC_CHIP_UNKNOWN,
PROC_CHIP_P7,
PROC_CHIP_P7P,
PROC_CHIP_P8_MURANO,
PROC_CHIP_P8_VENICE,
};
#define MAX_CHIPS (1 << 6) /* 6-bit chip ID */
/*
* For each chip in the system, we maintain this structure
*
* This contains fields used by different modules including
* modules in hw/ but is handy to keep per-chip data
*/
struct proc_chip {
uint32_t id; /* HW Chip ID (GCID) */
struct dt_node *devnode; /* "xscom" chip node */
/* These are only initialized after xcom_init */
enum proc_chip_type type;
uint32_t ec_level; /* 0xMm (DD1.0 = 0x10) */
/* Those two values are only populated on machines with an FSP
* dbob_id = Drawer/Block/Octant/Blade (DBOBID)
* pcid = HDAT processor_chip_id
*/
uint32_t dbob_id;
uint32_t pcid;
/* Used by hw/xscom.c */
uint64_t xscom_base;
/* Used by hw/lpc.c */
uint32_t lpc_xbase;
struct lock lpc_lock;
uint8_t lpc_fw_idsel;
uint8_t lpc_fw_rdsz;
/* Used by hw/slw.c */
uint64_t slw_base;
uint64_t slw_bar_size;
uint64_t slw_image_size;
/* Used by hw/homer.c */
uint64_t homer_base;
uint64_t homer_size;
uint64_t occ_common_base;
uint64_t occ_common_size;
/* Used by hw/centaur.c */
struct centaur_chip *centaurs;
/* Used by hw/p8-i2c.c */
struct list_head i2cms;
};
/* Mambo simplified chip model lacks some features, handle it here */
extern bool is_mambo_chip;
extern uint32_t pir_to_chip_id(uint32_t pir);
extern uint32_t pir_to_core_id(uint32_t pir);
extern uint32_t pir_to_thread_id(uint32_t pir);
extern struct proc_chip *next_chip(struct proc_chip *chip);
#define for_each_chip(__c) for (__c=next_chip(NULL); __c; __c=next_chip(__c))
extern struct proc_chip *get_chip(uint32_t chip_id);
extern void init_chips(void);
#endif /* __CHIP_H */
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