diff options
Diffstat (limited to 'src/include/cpu')
| -rw-r--r-- | src/include/cpu/intel/l2_cache.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/include/cpu/intel/l2_cache.h b/src/include/cpu/intel/l2_cache.h new file mode 100644 index 0000000000..a31fd9c534 --- /dev/null +++ b/src/include/cpu/intel/l2_cache.h @@ -0,0 +1,101 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2010 Keith Hui <buurin@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +/* 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 IA32_PLATFORM_ID 0x17 +#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 */ |