Keith Hui | 1ac19e2 | 2011-07-27 23:06:16 -0400 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2010 Keith Hui <buurin@gmail.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
Keith Hui | 1ac19e2 | 2011-07-27 23:06:16 -0400 | [diff] [blame] | 15 | */ |
| 16 | |
| 17 | /* The L2 cache definitions here only apply to SECC/SECC2 P6 family CPUs |
| 18 | * with Klamath (63x), Deschutes (65x) and Katmai (67x) cores. |
| 19 | * It is not required for Coppermine (68x) and Tualatin (6bx) cores. |
| 20 | * It is currently not known if Celerons with Mendocino core require |
| 21 | * the special initialization. |
| 22 | * Covington-core Celerons do not have L2 cache. |
| 23 | */ |
| 24 | |
| 25 | /* This is a straight port from coreboot v1. */ |
| 26 | |
| 27 | #ifndef __P6_L2_CACHE_H |
| 28 | #define __P6_L2_CACHE_H |
| 29 | |
| 30 | #define IA32_PLATFORM_ID 0x17 |
| 31 | #define EBL_CR_POWERON 0x2A |
| 32 | |
| 33 | #define BBL_CR_D0 0x88 |
| 34 | #define BBL_CR_D1 0x89 |
| 35 | #define BBL_CR_D2 0x8A |
| 36 | #define BBL_CR_D3 0x8B |
| 37 | |
| 38 | #define BBL_CR_ADDR 0x116 |
| 39 | #define BBL_CR_DECC 0x118 |
| 40 | #define BBL_CR_CTL 0x119 |
| 41 | #define BBL_CR_TRIG 0x11A |
| 42 | #define BBL_CR_BUSY 0x11B |
| 43 | #define BBL_CR_CTL3 0x11E |
| 44 | |
| 45 | #define BBLCR3_L2_CONFIGURED (1<<0) |
| 46 | /* bits [4:1] */ |
| 47 | #define BBLCR3_L2_LATENCY 0x1e |
| 48 | #define BBLCR3_L2_ECC_CHECK_ENABLE (1<<5) |
| 49 | #define BBLCR3_L2_ADDR_PARITY_ENABLE (1<<6) |
| 50 | #define BBLCR3_L2_CRTN_PARITY_ENABLE (1<<7) |
| 51 | #define BBLCR3_L2_ENABLED (1<<8) |
| 52 | /* bits [17:13] */ |
| 53 | #define BBLCR3_L2_SIZE (0x1f << 13) |
| 54 | #define BBLCR3_L2_SIZE_256K (0x01 << 13) |
| 55 | #define BBLCR3_L2_SIZE_512K (0x02 << 13) |
| 56 | #define BBLCR3_L2_SIZE_1M (0x04 << 13) |
| 57 | #define BBLCR3_L2_SIZE_2M (0x08 << 13) |
| 58 | #define BBLCR3_L2_SIZE_4M (0x10 << 13) |
| 59 | /* bits [22:20] */ |
| 60 | #define BBLCR3_L2_PHYSICAL_RANGE (0x7 << 20); |
| 61 | /* TODO: This bitmask does not agree with Intel's documentation. |
| 62 | * Get confirmation one way or another. |
| 63 | */ |
| 64 | #define BBLCR3_L2_SUPPLIED_ECC 0x40000 |
| 65 | |
| 66 | #define BBLCR3_L2_HARDWARE_DISABLE (1<<23) |
| 67 | /* Also known as... */ |
| 68 | #define BBLCR3_L2_NOT_PRESENT (1<<23) |
| 69 | |
| 70 | /* L2 commands */ |
| 71 | #define L2CMD_RLU 0x0c /* 01100 Data read w/ LRU update */ |
| 72 | #define L2CMD_TRR 0x0e /* 01110 Tag read with data read */ |
| 73 | #define L2CMD_TI 0x0f /* 01111 Tag inquiry */ |
| 74 | #define L2CMD_CR 0x02 /* 00010 L2 control register read */ |
| 75 | #define L2CMD_CW 0x03 /* 00011 L2 control register write */ |
| 76 | #define L2CMD_TWR 0x08 /* 010-- Tag read w/ data read */ |
| 77 | #define L2CMD_TWW 0x1c /* 111-- Tag write w/ data write */ |
| 78 | #define L2CMD_TW 0x10 /* 100-- Tag write */ |
| 79 | /* MESI encode for L2 commands above */ |
| 80 | #define L2CMD_MESI_M 3 |
| 81 | #define L2CMD_MESI_E 2 |
| 82 | #define L2CMD_MESI_S 1 |
| 83 | #define L2CMD_MESI_I 0 |
| 84 | |
| 85 | extern int calculate_l2_latency(void); |
| 86 | extern int signal_l2(u32 address_low, u32 data_high, u32 data_low, int way, u8 command); |
| 87 | extern int read_l2(u32 address); |
| 88 | extern int write_l2(u32 address, u32 data); |
| 89 | extern int test_l2_address_alias(u32 address1, u32 address2, u32 data_high, u32 data_low); |
| 90 | extern int calculate_l2_cache_size(void); |
| 91 | extern int calculate_l2_physical_address_range(void); |
| 92 | extern int set_l2_ecc(void); |
| 93 | |
| 94 | extern int p6_configure_l2_cache(void); |
| 95 | |
| 96 | #endif /* __P6_L2_CACHE_H */ |