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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* The L2 cache definitions here only apply to SECC/SECC2 P6 family CPUs
* with Klamath (63x), Deschutes (65x) and Katmai (67x) cores.
* It is not required for Coppermine (68x) and Tualatin (6bx) cores.
* It is currently not known if Celerons with Mendocino core require
* the special initialization.
* Covington-core Celerons do not have L2 cache.
*/
/* This is a straight port from coreboot v1. */
#ifndef __P6_L2_CACHE_H
#define __P6_L2_CACHE_H
#define EBL_CR_POWERON 0x2A
#define BBL_CR_D0 0x88
#define BBL_CR_D1 0x89
#define BBL_CR_D2 0x8A
#define BBL_CR_D3 0x8B
#define BBL_CR_ADDR 0x116
#define BBL_CR_DECC 0x118
#define BBL_CR_CTL 0x119
#define BBL_CR_TRIG 0x11A
#define BBL_CR_BUSY 0x11B
#define BBL_CR_CTL3 0x11E
#define BBLCR3_L2_CONFIGURED (1<<0)
/* bits [4:1] */
#define BBLCR3_L2_LATENCY 0x1e
#define BBLCR3_L2_ECC_CHECK_ENABLE (1<<5)
#define BBLCR3_L2_ADDR_PARITY_ENABLE (1<<6)
#define BBLCR3_L2_CRTN_PARITY_ENABLE (1<<7)
#define BBLCR3_L2_ENABLED (1<<8)
/* bits [17:13] */
#define BBLCR3_L2_SIZE (0x1f << 13)
#define BBLCR3_L2_SIZE_256K (0x01 << 13)
#define BBLCR3_L2_SIZE_512K (0x02 << 13)
#define BBLCR3_L2_SIZE_1M (0x04 << 13)
#define BBLCR3_L2_SIZE_2M (0x08 << 13)
#define BBLCR3_L2_SIZE_4M (0x10 << 13)
/* bits [22:20] */
#define BBLCR3_L2_PHYSICAL_RANGE (0x7 << 20);
/* TODO: This bitmask does not agree with Intel's documentation.
* Get confirmation one way or another.
*/
#define BBLCR3_L2_SUPPLIED_ECC 0x40000
#define BBLCR3_L2_HARDWARE_DISABLE (1<<23)
/* Also known as... */
#define BBLCR3_L2_NOT_PRESENT (1<<23)
/* L2 commands */
#define L2CMD_RLU 0x0c /* 01100 Data read w/ LRU update */
#define L2CMD_TRR 0x0e /* 01110 Tag read with data read */
#define L2CMD_TI 0x0f /* 01111 Tag inquiry */
#define L2CMD_CR 0x02 /* 00010 L2 control register read */
#define L2CMD_CW 0x03 /* 00011 L2 control register write */
#define L2CMD_TWR 0x08 /* 010-- Tag read w/ data read */
#define L2CMD_TWW 0x1c /* 111-- Tag write w/ data write */
#define L2CMD_TW 0x10 /* 100-- Tag write */
/* MESI encode for L2 commands above */
#define L2CMD_MESI_M 3
#define L2CMD_MESI_E 2
#define L2CMD_MESI_S 1
#define L2CMD_MESI_I 0
extern int calculate_l2_latency(void);
extern int signal_l2(u32 address_low, u32 data_high, u32 data_low, int way,
u8 command);
extern int read_l2(u32 address);
extern int write_l2(u32 address, u32 data);
extern int test_l2_address_alias(u32 address1, u32 address2, u32 data_high,
u32 data_low);
extern int calculate_l2_cache_size(void);
extern int calculate_l2_physical_address_range(void);
extern int set_l2_ecc(void);
extern int p6_configure_l2_cache(void);
#endif /* __P6_L2_CACHE_H */
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