Subrata Banik | 7609c65 | 2017-05-19 14:50:09 +0530 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2017 Intel Corporation. |
| 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; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | #include <arch/io.h> |
| 17 | #include <delay.h> |
| 18 | #include <device/device.h> |
| 19 | #include <device/pci.h> |
| 20 | #include <intelblocks/systemagent.h> |
| 21 | #include <soc/iomap.h> |
| 22 | #include <soc/pci_devs.h> |
| 23 | #include <soc/systemagent.h> |
| 24 | #include "systemagent_def.h" |
| 25 | #include <timer.h> |
| 26 | |
| 27 | #if !ENV_RAMSTAGE |
| 28 | void bootblock_systemagent_early_init(void) |
| 29 | { |
| 30 | uint32_t reg; |
| 31 | uint8_t pciexbar_length; |
| 32 | |
| 33 | /* |
| 34 | * The PCIEXBAR is assumed to live in the memory mapped IO space under |
| 35 | * 4GiB. |
| 36 | */ |
| 37 | reg = 0; |
| 38 | pci_io_write_config32(SA_DEV_ROOT, PCIEXBAR + 4, reg); |
| 39 | |
| 40 | /* Get PCI Express Region Length */ |
| 41 | switch (CONFIG_SA_PCIEX_LENGTH) { |
| 42 | case 256 * MiB: |
| 43 | pciexbar_length = PCIEXBAR_LENGTH_256MB; |
| 44 | break; |
| 45 | case 128 * MiB: |
| 46 | pciexbar_length = PCIEXBAR_LENGTH_128MB; |
| 47 | break; |
| 48 | case 64 * MiB: |
| 49 | pciexbar_length = PCIEXBAR_LENGTH_64MB; |
| 50 | break; |
| 51 | default: |
| 52 | pciexbar_length = PCIEXBAR_LENGTH_256MB; |
| 53 | } |
| 54 | reg = CONFIG_MMCONF_BASE_ADDRESS | (pciexbar_length << 1) |
| 55 | | PCIEXBAR_PCIEXBAREN; |
| 56 | pci_io_write_config32(SA_DEV_ROOT, PCIEXBAR, reg); |
| 57 | |
| 58 | /* |
| 59 | * TSEG defines the base of SMM range. BIOS determines the base |
| 60 | * of TSEG memory which must be at or below Graphics base of GTT |
| 61 | * Stolen memory, hence its better to clear TSEG register early |
| 62 | * to avoid power on default non-zero value (if any). |
| 63 | */ |
| 64 | pci_write_config32(SA_DEV_ROOT, TSEG, 0); |
| 65 | } |
| 66 | #endif |
| 67 | |
| 68 | void sa_set_pci_bar(const struct sa_mmio_descriptor *fixed_set_resources, |
| 69 | size_t count) |
| 70 | { |
| 71 | int i; |
| 72 | |
| 73 | for (i = 0; i < count; i++) { |
| 74 | uintptr_t base; |
| 75 | unsigned int index; |
| 76 | |
| 77 | index = fixed_set_resources[i].index; |
| 78 | /* Check if PCI BAR already enabled */ |
| 79 | base = pci_read_config32(SA_DEV_ROOT, index); |
| 80 | |
| 81 | /* If enabled don't program it. */ |
| 82 | if (base & 0x1) |
| 83 | return; |
| 84 | |
| 85 | base = fixed_set_resources[i].base; |
| 86 | |
| 87 | pci_write_config32(SA_DEV_ROOT, index, base | 1); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | /* |
| 92 | * There are special BARs that actually are programmed in the MCHBAR. These |
| 93 | * Intel special features, but they do consume resources that need to be |
| 94 | * accounted for. |
| 95 | */ |
| 96 | void sa_set_mch_bar(const struct sa_mmio_descriptor *fixed_set_resources, |
| 97 | size_t count) |
| 98 | { |
| 99 | int i; |
| 100 | |
| 101 | for (i = 0; i < count; i++) { |
| 102 | uintptr_t base; |
| 103 | unsigned int index; |
| 104 | |
| 105 | base = fixed_set_resources[i].base; |
| 106 | index = fixed_set_resources[i].index; |
| 107 | write32((void *)(MCH_BASE_ADDRESS + index), base | 1); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | void enable_pam_region(void) |
| 112 | { |
| 113 | /* All read and writes in this region are serviced by DRAM */ |
| 114 | pci_write_config8(SA_DEV_ROOT, PAM0, 0x30); |
| 115 | pci_write_config8(SA_DEV_ROOT, PAM1, 0x33); |
| 116 | pci_write_config8(SA_DEV_ROOT, PAM2, 0x33); |
| 117 | pci_write_config8(SA_DEV_ROOT, PAM3, 0x33); |
| 118 | pci_write_config8(SA_DEV_ROOT, PAM4, 0x33); |
| 119 | pci_write_config8(SA_DEV_ROOT, PAM5, 0x33); |
| 120 | pci_write_config8(SA_DEV_ROOT, PAM6, 0x33); |
| 121 | } |
| 122 | |
| 123 | void enable_bios_reset_cpl(void) |
| 124 | { |
| 125 | u8 bios_reset_cpl; |
| 126 | |
| 127 | /* |
| 128 | * Set bits 0+1 of BIOS_RESET_CPL to indicate to the CPU |
| 129 | * that BIOS has initialized memory and power management |
| 130 | */ |
| 131 | bios_reset_cpl = MCHBAR8(BIOS_RESET_CPL); |
| 132 | bios_reset_cpl |= 3; |
| 133 | MCHBAR8(BIOS_RESET_CPL) = bios_reset_cpl; |
| 134 | } |
Subrata Banik | bd6ac22 | 2017-08-21 16:42:15 +0530 | [diff] [blame] | 135 | |
Subrata Banik | 73f448f | 2017-08-29 18:51:14 +0530 | [diff] [blame] | 136 | uintptr_t sa_get_tolud_base(void) |
Subrata Banik | bd6ac22 | 2017-08-21 16:42:15 +0530 | [diff] [blame] | 137 | { |
| 138 | /* All regions concerned for have 1 MiB alignment. */ |
| 139 | return ALIGN_DOWN(pci_read_config32(SA_DEV_ROOT, TOLUD), 1*MiB); |
| 140 | } |
| 141 | |
| 142 | static uint16_t sa_get_ggc_reg(void) |
| 143 | { |
| 144 | return pci_read_config16(SA_DEV_ROOT, GGC); |
| 145 | } |
| 146 | |
Subrata Banik | 445368c | 2018-04-02 11:34:59 +0530 | [diff] [blame] | 147 | /* |
| 148 | * Internal Graphics Pre-allocated Memory - As per Intel FSP UPD Header |
| 149 | * definition, size of memory preallocatred for internal graphics can be |
| 150 | * configured based on below lists: |
| 151 | * |
| 152 | * 0x00:0MB, 0x01:32MB, 0x02:64MB, 0x03:96MB, 0x04:128MB, 0x05:160MB, |
| 153 | * 0xF0:4MB, 0xF1:8MB, 0xF2:12MB, 0xF3:16MB, 0xF4:20MB, 0xF5:24MB, 0xF6:28MB, |
| 154 | * 0xF7:32MB, 0xF8:36MB, 0xF9:40MB, 0xFA:44MB, 0xFB:48MB, 0xFC:52MB, 0xFD:56MB, |
| 155 | * 0xFE:60MB |
| 156 | * |
| 157 | * Today all existing SoCs(except Cannonlake) are supported under intel |
| 158 | * common code block design may not need to use any other values than 0x0-0x05 |
| 159 | * for GFX DSM range. DSM memory ranges between 0xF0-0xF6 are majorly for |
| 160 | * early SoC samples and validation requirement. This code block to justify |
| 161 | * all differnet possible ranges that FSP may support for a platform. |
| 162 | */ |
Subrata Banik | bd6ac22 | 2017-08-21 16:42:15 +0530 | [diff] [blame] | 163 | size_t sa_get_dsm_size(void) |
| 164 | { |
Subrata Banik | 445368c | 2018-04-02 11:34:59 +0530 | [diff] [blame] | 165 | uint32_t prealloc_memory; |
| 166 | uint16_t ggc; |
| 167 | |
| 168 | ggc = sa_get_ggc_reg(); |
| 169 | prealloc_memory = (ggc & G_GMS_MASK) >> G_GMS_OFFSET; |
| 170 | |
| 171 | if (prealloc_memory < 0xF0) |
| 172 | return prealloc_memory * 32*MiB; |
| 173 | else |
| 174 | return (prealloc_memory - 0xEF) * 4*MiB; |
Subrata Banik | bd6ac22 | 2017-08-21 16:42:15 +0530 | [diff] [blame] | 175 | } |
| 176 | |
Subrata Banik | 73f448f | 2017-08-29 18:51:14 +0530 | [diff] [blame] | 177 | static uintptr_t sa_get_gsm_base(void) |
| 178 | { |
| 179 | /* All regions concerned for have 1 MiB alignment. */ |
| 180 | return ALIGN_DOWN(pci_read_config32(SA_DEV_ROOT, BGSM), 1*MiB); |
| 181 | } |
| 182 | |
Subrata Banik | bd6ac22 | 2017-08-21 16:42:15 +0530 | [diff] [blame] | 183 | size_t sa_get_gsm_size(void) |
| 184 | { |
| 185 | uint8_t ggms; |
| 186 | |
| 187 | ggms = (sa_get_ggc_reg() & G_GGMS_MASK) >> G_GGMS_OFFSET; |
| 188 | |
| 189 | /* |
| 190 | * Size of GSM: 0x0: No Preallocated Memory 0x1: 2MB Memory |
| 191 | * 0x2: 4MB Memory 0x3: 8MB Memory |
| 192 | */ |
| 193 | if (ggms) |
| 194 | return 1*MiB << ggms; |
| 195 | else |
| 196 | return 0; |
| 197 | } |
| 198 | |
Subrata Banik | 73f448f | 2017-08-29 18:51:14 +0530 | [diff] [blame] | 199 | uintptr_t sa_get_tseg_base(void) |
| 200 | { |
| 201 | /* All regions concerned for have 1 MiB alignment. */ |
| 202 | return ALIGN_DOWN(pci_read_config32(SA_DEV_ROOT, TSEG), 1*MiB); |
| 203 | } |
| 204 | |
| 205 | size_t sa_get_tseg_size(void) |
| 206 | { |
| 207 | return sa_get_gsm_base() - sa_get_tseg_base(); |
| 208 | } |
| 209 | |
Subrata Banik | bd6ac22 | 2017-08-21 16:42:15 +0530 | [diff] [blame] | 210 | /* |
| 211 | * Get DPR size in case CONFIG_SA_ENABLE_DPR is selected by SoC. |
| 212 | */ |
| 213 | size_t sa_get_dpr_size(void) |
| 214 | { |
| 215 | uintptr_t dpr_reg; |
| 216 | size_t size = 0; |
| 217 | /* |
| 218 | * DMA Protected Range can be reserved below TSEG for PCODE patch |
| 219 | * or TXT/BootGuard related data. Rather than report a base address |
| 220 | * the DPR register reports the TOP of the region, which is the same |
| 221 | * as TSEG base. The region size is reported in MiB in bits 11:4. |
| 222 | */ |
| 223 | dpr_reg = pci_read_config32(SA_DEV_ROOT, DPR); |
| 224 | if (dpr_reg & DPR_EPM) |
| 225 | size = (dpr_reg & DPR_SIZE_MASK) << 16; |
| 226 | |
| 227 | return size; |
| 228 | } |