Madhukar Pappireddy | ae9677b | 2020-01-27 13:37:51 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2020, Arm Limited. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <assert.h> |
| 8 | #include <common/debug.h> |
| 9 | #include <common/fdt_wrappers.h> |
| 10 | #include <fconf_hw_config_getter.h> |
| 11 | #include <libfdt.h> |
| 12 | #include <plat/common/platform.h> |
| 13 | |
| 14 | struct gicv3_config_t gicv3_config; |
Madhukar Pappireddy | 26b945c | 2019-12-27 12:02:34 -0600 | [diff] [blame] | 15 | struct hw_topology_t soc_topology; |
Madhukar Pappireddy | 361c1b3 | 2020-03-24 10:03:34 -0500 | [diff] [blame] | 16 | struct uart_serial_config_t uart_serial_config; |
laurenw-arm | fc3e7a2 | 2020-02-06 11:42:18 -0600 | [diff] [blame] | 17 | struct cpu_timer_t cpu_timer; |
Madhukar Pappireddy | 361c1b3 | 2020-03-24 10:03:34 -0500 | [diff] [blame] | 18 | |
| 19 | #define ILLEGAL_ADDR ULL(~0) |
Madhukar Pappireddy | ae9677b | 2020-01-27 13:37:51 -0600 | [diff] [blame] | 20 | |
| 21 | int fconf_populate_gicv3_config(uintptr_t config) |
| 22 | { |
| 23 | int err; |
| 24 | int node; |
Andre Przywara | e183e15 | 2020-03-26 11:57:43 +0000 | [diff] [blame] | 25 | uintptr_t addr; |
Madhukar Pappireddy | ae9677b | 2020-01-27 13:37:51 -0600 | [diff] [blame] | 26 | |
| 27 | /* Necessary to work with libfdt APIs */ |
| 28 | const void *hw_config_dtb = (const void *)config; |
| 29 | |
| 30 | /* |
| 31 | * Find the offset of the node containing "arm,gic-v3" compatible property. |
| 32 | * Populating fconf strucutures dynamically is not supported for legacy |
| 33 | * systems which use GICv2 IP. Simply skip extracting GIC properties. |
| 34 | */ |
| 35 | node = fdt_node_offset_by_compatible(hw_config_dtb, -1, "arm,gic-v3"); |
| 36 | if (node < 0) { |
| 37 | WARN("FCONF: Unable to locate node with arm,gic-v3 compatible property\n"); |
| 38 | return 0; |
| 39 | } |
Andre Przywara | e183e15 | 2020-03-26 11:57:43 +0000 | [diff] [blame] | 40 | /* The GICv3 DT binding holds at least two address/size pairs, |
| 41 | * the first describing the distributor, the second the redistributors. |
| 42 | * See: bindings/interrupt-controller/arm,gic-v3.yaml |
| 43 | */ |
| 44 | err = fdt_get_reg_props_by_index(hw_config_dtb, node, 0, &addr, NULL); |
| 45 | if (err < 0) { |
| 46 | ERROR("FCONF: Failed to read GICD reg property of GIC node\n"); |
| 47 | return err; |
| 48 | } |
| 49 | gicv3_config.gicd_base = addr; |
Madhukar Pappireddy | ae9677b | 2020-01-27 13:37:51 -0600 | [diff] [blame] | 50 | |
Andre Przywara | e183e15 | 2020-03-26 11:57:43 +0000 | [diff] [blame] | 51 | err = fdt_get_reg_props_by_index(hw_config_dtb, node, 1, &addr, NULL); |
Madhukar Pappireddy | ae9677b | 2020-01-27 13:37:51 -0600 | [diff] [blame] | 52 | if (err < 0) { |
Andre Przywara | e183e15 | 2020-03-26 11:57:43 +0000 | [diff] [blame] | 53 | ERROR("FCONF: Failed to read GICR reg property of GIC node\n"); |
| 54 | } else { |
| 55 | gicv3_config.gicr_base = addr; |
Madhukar Pappireddy | ae9677b | 2020-01-27 13:37:51 -0600 | [diff] [blame] | 56 | } |
Andre Przywara | e183e15 | 2020-03-26 11:57:43 +0000 | [diff] [blame] | 57 | |
Madhukar Pappireddy | ae9677b | 2020-01-27 13:37:51 -0600 | [diff] [blame] | 58 | return err; |
| 59 | } |
| 60 | |
Madhukar Pappireddy | 26b945c | 2019-12-27 12:02:34 -0600 | [diff] [blame] | 61 | int fconf_populate_topology(uintptr_t config) |
| 62 | { |
Andre Przywara | fe5bdf5 | 2020-03-26 11:22:37 +0000 | [diff] [blame] | 63 | int err, node, cluster_node, core_node, thread_node; |
Madhukar Pappireddy | 26b945c | 2019-12-27 12:02:34 -0600 | [diff] [blame] | 64 | uint32_t cluster_count = 0, max_cpu_per_cluster = 0, total_cpu_count = 0; |
Andre Przywara | fe5bdf5 | 2020-03-26 11:22:37 +0000 | [diff] [blame] | 65 | uint32_t max_pwr_lvl = 0; |
Madhukar Pappireddy | 26b945c | 2019-12-27 12:02:34 -0600 | [diff] [blame] | 66 | |
| 67 | /* Necessary to work with libfdt APIs */ |
| 68 | const void *hw_config_dtb = (const void *)config; |
| 69 | |
| 70 | /* Find the offset of the node containing "arm,psci-1.0" compatible property */ |
| 71 | node = fdt_node_offset_by_compatible(hw_config_dtb, -1, "arm,psci-1.0"); |
| 72 | if (node < 0) { |
| 73 | ERROR("FCONF: Unable to locate node with arm,psci-1.0 compatible property\n"); |
| 74 | return node; |
| 75 | } |
| 76 | |
Andre Przywara | fe5bdf5 | 2020-03-26 11:22:37 +0000 | [diff] [blame] | 77 | err = fdt_read_uint32(hw_config_dtb, node, "max-pwr-lvl", &max_pwr_lvl); |
Madhukar Pappireddy | 26b945c | 2019-12-27 12:02:34 -0600 | [diff] [blame] | 78 | if (err < 0) { |
| 79 | /* |
| 80 | * Some legacy FVP dts may not have this property. Assign the default |
| 81 | * value. |
| 82 | */ |
| 83 | WARN("FCONF: Could not locate max-pwr-lvl property\n"); |
| 84 | max_pwr_lvl = 2; |
| 85 | } |
| 86 | |
Andre Przywara | fe5bdf5 | 2020-03-26 11:22:37 +0000 | [diff] [blame] | 87 | assert(max_pwr_lvl <= MPIDR_AFFLVL2); |
Madhukar Pappireddy | 26b945c | 2019-12-27 12:02:34 -0600 | [diff] [blame] | 88 | |
| 89 | /* Find the offset of the "cpus" node */ |
| 90 | node = fdt_path_offset(hw_config_dtb, "/cpus"); |
| 91 | if (node < 0) { |
| 92 | ERROR("FCONF: Node '%s' not found in hardware configuration dtb\n", "cpus"); |
| 93 | return node; |
| 94 | } |
| 95 | |
| 96 | /* A typical cpu-map node in a device tree is shown here for reference |
| 97 | cpu-map { |
| 98 | cluster0 { |
| 99 | core0 { |
| 100 | cpu = <&CPU0>; |
| 101 | }; |
| 102 | core1 { |
| 103 | cpu = <&CPU1>; |
| 104 | }; |
| 105 | }; |
| 106 | |
| 107 | cluster1 { |
| 108 | core0 { |
| 109 | cpu = <&CPU2>; |
| 110 | }; |
| 111 | core1 { |
| 112 | cpu = <&CPU3>; |
| 113 | }; |
| 114 | }; |
| 115 | }; |
| 116 | */ |
| 117 | |
| 118 | /* Locate the cpu-map child node */ |
| 119 | node = fdt_subnode_offset(hw_config_dtb, node, "cpu-map"); |
| 120 | if (node < 0) { |
| 121 | ERROR("FCONF: Node '%s' not found in hardware configuration dtb\n", "cpu-map"); |
| 122 | return node; |
| 123 | } |
| 124 | |
| 125 | uint32_t cpus_per_cluster[PLAT_ARM_CLUSTER_COUNT] = {0}; |
| 126 | |
| 127 | /* Iterate through cluster nodes */ |
| 128 | fdt_for_each_subnode(cluster_node, hw_config_dtb, node) { |
| 129 | assert(cluster_count < PLAT_ARM_CLUSTER_COUNT); |
| 130 | |
| 131 | /* Iterate through core nodes */ |
| 132 | fdt_for_each_subnode(core_node, hw_config_dtb, cluster_node) { |
| 133 | /* core nodes may have child nodes i.e., "thread" nodes */ |
| 134 | if (fdt_first_subnode(hw_config_dtb, core_node) < 0) { |
| 135 | cpus_per_cluster[cluster_count]++; |
| 136 | } else { |
| 137 | /* Multi-threaded CPU description is found in dtb */ |
| 138 | fdt_for_each_subnode(thread_node, hw_config_dtb, core_node) { |
| 139 | cpus_per_cluster[cluster_count]++; |
| 140 | } |
| 141 | |
| 142 | /* Since in some dtbs, core nodes may not have thread node, |
| 143 | * no need to error if even one child node is not found. |
| 144 | */ |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | /* Ensure every cluster node has at least 1 child node */ |
| 149 | if (cpus_per_cluster[cluster_count] < 1U) { |
| 150 | ERROR("FCONF: Unable to locate the core node in cluster %d\n", cluster_count); |
| 151 | return -1; |
| 152 | } |
| 153 | |
Madhukar Pappireddy | 361c1b3 | 2020-03-24 10:03:34 -0500 | [diff] [blame] | 154 | VERBOSE("CLUSTER ID: %d cpu-count: %d\n", cluster_count, |
| 155 | cpus_per_cluster[cluster_count]); |
Madhukar Pappireddy | 26b945c | 2019-12-27 12:02:34 -0600 | [diff] [blame] | 156 | |
| 157 | /* Find the maximum number of cpus in any cluster */ |
| 158 | max_cpu_per_cluster = MAX(max_cpu_per_cluster, cpus_per_cluster[cluster_count]); |
| 159 | total_cpu_count += cpus_per_cluster[cluster_count]; |
| 160 | cluster_count++; |
| 161 | } |
| 162 | |
| 163 | |
| 164 | /* At least one cluster node is expected in hardware configuration dtb */ |
| 165 | if (cluster_count < 1U) { |
| 166 | ERROR("FCONF: Unable to locate the cluster node in cpu-map node\n"); |
| 167 | return -1; |
| 168 | } |
| 169 | |
Andre Przywara | fe5bdf5 | 2020-03-26 11:22:37 +0000 | [diff] [blame] | 170 | soc_topology.plat_max_pwr_level = max_pwr_lvl; |
Madhukar Pappireddy | 26b945c | 2019-12-27 12:02:34 -0600 | [diff] [blame] | 171 | soc_topology.plat_cluster_count = cluster_count; |
| 172 | soc_topology.cluster_cpu_count = max_cpu_per_cluster; |
| 173 | soc_topology.plat_cpu_count = total_cpu_count; |
| 174 | |
Madhukar Pappireddy | 361c1b3 | 2020-03-24 10:03:34 -0500 | [diff] [blame] | 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | int fconf_populate_uart_config(uintptr_t config) |
| 179 | { |
| 180 | int uart_node, node, err; |
| 181 | uintptr_t addr; |
| 182 | const char *path; |
| 183 | uint32_t phandle; |
| 184 | uint64_t translated_addr; |
| 185 | |
| 186 | /* Necessary to work with libfdt APIs */ |
| 187 | const void *hw_config_dtb = (const void *)config; |
| 188 | |
| 189 | /* |
| 190 | * uart child node is indirectly referenced through its path which is |
| 191 | * specified in the `serial1` property of the "aliases" node. |
| 192 | * Note that TF-A boot console is mapped to serial0 while runtime |
| 193 | * console is mapped to serial1. |
| 194 | */ |
| 195 | |
| 196 | path = fdt_get_alias(hw_config_dtb, "serial1"); |
| 197 | if (path == NULL) { |
| 198 | ERROR("FCONF: Could not read serial1 property in aliases node\n"); |
| 199 | return -1; |
| 200 | } |
| 201 | |
| 202 | /* Find the offset of the uart serial node */ |
| 203 | uart_node = fdt_path_offset(hw_config_dtb, path); |
| 204 | if (uart_node < 0) { |
| 205 | ERROR("FCONF: Failed to locate uart serial node using its path\n"); |
| 206 | return -1; |
| 207 | } |
| 208 | |
| 209 | /* uart serial node has its offset and size of address in reg property */ |
| 210 | err = fdt_get_reg_props_by_index(hw_config_dtb, uart_node, 0, &addr, |
| 211 | NULL); |
| 212 | if (err < 0) { |
| 213 | ERROR("FCONF: Failed to read reg property of '%s' node\n", |
| 214 | "uart serial"); |
| 215 | return err; |
| 216 | } |
| 217 | VERBOSE("FCONF: UART node address: %lx\n", addr); |
| 218 | |
| 219 | /* |
| 220 | * Perform address translation of local device address to CPU address |
| 221 | * domain. |
| 222 | */ |
| 223 | translated_addr = fdtw_translate_address(hw_config_dtb, |
| 224 | uart_node, (uint64_t)addr); |
| 225 | if (translated_addr == ILLEGAL_ADDR) { |
| 226 | ERROR("FCONF: failed to translate UART node base address"); |
| 227 | return -1; |
| 228 | } |
| 229 | |
| 230 | uart_serial_config.uart_base = translated_addr; |
| 231 | |
| 232 | VERBOSE("FCONF: UART serial device base address: %llx\n", |
| 233 | uart_serial_config.uart_base); |
| 234 | |
| 235 | /* |
| 236 | * The phandle of the DT node which captures the clock info of uart |
| 237 | * serial node is specified in the "clocks" property. |
| 238 | */ |
| 239 | err = fdt_read_uint32(hw_config_dtb, uart_node, "clocks", &phandle); |
| 240 | if (err < 0) { |
| 241 | ERROR("FCONF: Could not read clocks property in uart serial node\n"); |
| 242 | return err; |
| 243 | } |
| 244 | |
| 245 | node = fdt_node_offset_by_phandle(hw_config_dtb, phandle); |
| 246 | if (node < 0) { |
| 247 | ERROR("FCONF: Failed to locate clk node using its path\n"); |
| 248 | return node; |
| 249 | } |
| 250 | |
| 251 | /* |
| 252 | * Retrieve clock frequency. We assume clock provider generates a fixed |
| 253 | * clock. |
| 254 | */ |
| 255 | err = fdt_read_uint32(hw_config_dtb, node, "clock-frequency", |
| 256 | &uart_serial_config.uart_clk); |
| 257 | if (err < 0) { |
| 258 | ERROR("FCONF: Could not read clock-frequency property in clk node\n"); |
| 259 | return err; |
| 260 | } |
| 261 | |
| 262 | VERBOSE("FCONF: UART serial device clk frequency: %x\n", |
| 263 | uart_serial_config.uart_clk); |
laurenw-arm | fc3e7a2 | 2020-02-06 11:42:18 -0600 | [diff] [blame] | 264 | |
| 265 | return 0; |
| 266 | } |
| 267 | |
| 268 | int fconf_populate_cpu_timer(uintptr_t config) |
| 269 | { |
| 270 | int err, node; |
| 271 | |
| 272 | /* Necessary to work with libfdt APIs */ |
| 273 | const void *hw_config_dtb = (const void *)config; |
| 274 | |
| 275 | /* Find the node offset point to "arm,armv8-timer" compatible property, |
| 276 | * a per-core architected timer attached to a GIC to deliver its per-processor |
| 277 | * interrupts via PPIs */ |
| 278 | node = fdt_node_offset_by_compatible(hw_config_dtb, -1, "arm,armv8-timer"); |
| 279 | if (node < 0) { |
| 280 | ERROR("FCONF: Unrecognized hardware configuration dtb (%d)\n", node); |
| 281 | return node; |
| 282 | } |
| 283 | |
| 284 | /* Locate the cell holding the clock-frequency, an optional field */ |
| 285 | err = fdt_read_uint32(hw_config_dtb, node, "clock-frequency", &cpu_timer.clock_freq); |
| 286 | if (err < 0) { |
| 287 | WARN("FCONF failed to read clock-frequency property\n"); |
| 288 | } |
| 289 | |
Madhukar Pappireddy | 26b945c | 2019-12-27 12:02:34 -0600 | [diff] [blame] | 290 | return 0; |
| 291 | } |
Madhukar Pappireddy | ae9677b | 2020-01-27 13:37:51 -0600 | [diff] [blame] | 292 | |
| 293 | FCONF_REGISTER_POPULATOR(HW_CONFIG, gicv3_config, fconf_populate_gicv3_config); |
Madhukar Pappireddy | 26b945c | 2019-12-27 12:02:34 -0600 | [diff] [blame] | 294 | FCONF_REGISTER_POPULATOR(HW_CONFIG, topology, fconf_populate_topology); |
Madhukar Pappireddy | 361c1b3 | 2020-03-24 10:03:34 -0500 | [diff] [blame] | 295 | FCONF_REGISTER_POPULATOR(HW_CONFIG, uart_config, fconf_populate_uart_config); |
laurenw-arm | fc3e7a2 | 2020-02-06 11:42:18 -0600 | [diff] [blame] | 296 | FCONF_REGISTER_POPULATOR(HW_CONFIG, cpu_timer, fconf_populate_cpu_timer); |