1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2021 Rockchip Electronics Co., Ltd 4 */ 5 6 #include <common.h> 7 #include <amp.h> 8 #include <bidram.h> 9 #include <boot_rkimg.h> 10 #include <config.h> 11 #include <sysmem.h> 12 #include <asm/gic.h> 13 #include <asm/io.h> 14 #include <asm/arch/rockchip_smccc.h> 15 16 /* 17 * [Design Principles] 18 * 19 * [amp.img] 20 * The amp image with FIT format which consists of non-linux firmwares. 21 * Please refer to: driver/cpu/amp.its. 22 * 23 * amp.img generation: ./tools/mkimage -f drivers/cpu/amp.its -E -p 0xe00 amp.img 24 * 25 * [linux] 26 * We still use the traditional solution for a better compatibility: 27 * boot.img/recovery.img with FIT format or Android format. 28 * 29 * The developer need add "/configurations/conf/linux" node to configure: 30 * description, arch, cpu, thumb, hyp, udelay(optional) properties. 31 * The addresses depend on U-Boot: kernel_addr_r, fdt_addr_r and 32 * ramdisk_addr_r. Please refer to: driver/cpu/amp.its. 33 * 34 * [memory management] 35 * U-Boot is not responsible for memory distribution/fixup any more, please 36 * handle this on kernel dts "/memory". 37 * 38 * [trust] 39 * The AMP feature requires trust support. 40 */ 41 42 #define AMP_PART "amp" 43 #define gicd_readl(offset) readl((void *)GICD_BASE + (offset)) 44 #define gicd_writel(v, offset) writel(v, (void *)GICD_BASE + (offset)) 45 46 typedef struct boot_args { 47 ulong arg0; 48 ulong arg1; 49 ulong arg2; 50 ulong arg3; 51 } boot_args_t; 52 53 typedef struct boot_cpu { 54 u32 arch; 55 u32 state; 56 u32 entry; 57 u32 linux_os; 58 } boot_cpu_t; 59 60 static boot_cpu_t g_bootcpu; 61 62 static u32 fit_get_u32_default(const void *fit, int noffset, 63 const char *prop, u32 def) 64 { 65 const fdt32_t *val; 66 67 val = fdt_getprop(fit, noffset, prop, NULL); 68 if (!val) 69 return def; 70 71 return fdt32_to_cpu(*val); 72 } 73 74 static int load_linux_for_nonboot_cpu(u32 cpu, u32 aarch64, u32 load, 75 u32 *entry, boot_args_t *args) 76 { 77 static const char *boot_cmd[] = { 78 "boot_fit", "boot_android ${devtype} ${devnum}" }; 79 int i, ret; 80 81 env_set_hex("bootm_states_unmask", BOOTM_STATE_OS_GO); 82 for (i = 0; i < ARRAY_SIZE(boot_cmd); i++) { 83 ret = run_command(boot_cmd[i], 0); 84 if (!ret) 85 break; 86 } 87 env_set("bootm_states_unmask", NULL); 88 if (ret) { 89 AMP_E("Load linux failed, ret=%d\n", ret); 90 return ret; 91 } 92 93 /* linux boot args */ 94 if (aarch64) { 95 args->arg0 = (ulong)gd->fdt_blob; 96 args->arg1 = 0; 97 args->arg2 = 0; 98 } else { 99 args->arg0 = 0; 100 args->arg1 = 0; 101 args->arg2 = (ulong)gd->fdt_blob; 102 } 103 104 /* don't need call cleanup_before_linux() as this nonboot cpu is clean */ 105 board_quiesce_devices(&images); 106 flush_dcache_all(); 107 108 /* fixup: ramdisk/fdt/entry depend on U-Boot */ 109 *entry = env_get_ulong("kernel_addr_r", 16, 0); 110 111 return 0; 112 } 113 114 static int is_default_pe_state(u32 pe_state) 115 { 116 #ifdef CONFIG_ARM64 117 return (pe_state == PE_STATE(1, 1, 0, 0)); 118 #else 119 return (pe_state == PE_STATE(0, 0, 0, 0)); 120 #endif 121 } 122 123 static void setup_sync_bits_for_linux(void) 124 { 125 u32 val, num_irq, offset; 126 127 val = gicd_readl(GICD_CTLR); 128 val &= ~0x3; 129 gicd_writel(val, GICD_CTLR); 130 131 num_irq = 32 * ((gicd_readl(GICD_TYPER) & 0x1F) + 1); 132 offset = ((num_irq - 1) / 4) * 4; 133 gicd_writel(0x0, GICD_IPRIORITYRn + offset); 134 } 135 136 static int smc_cpu_on(u32 cpu, u32 pe_state, u32 entry, boot_args_t *args) 137 { 138 int ret; 139 140 AMP_I("Brought up cpu[%x] with state 0x%x, entry 0x%08x ...", 141 cpu, pe_state, entry); 142 143 if (is_default_pe_state(pe_state)) 144 goto finish; 145 146 ret = sip_smc_amp_cfg(AMP_PE_STATE, cpu, pe_state, 0); 147 if (ret) { 148 AMP_E("smc pe-state, ret=%d\n", ret); 149 return ret; 150 } 151 152 ret = sip_smc_amp_cfg(AMP_BOOT_ARG01, cpu, args->arg0, args->arg1); 153 if (ret) { 154 AMP_E("smc boot arg01, ret=%d\n", ret); 155 return ret; 156 } 157 158 ret = sip_smc_amp_cfg(AMP_BOOT_ARG23, cpu, args->arg2, args->arg3); 159 if (ret) { 160 AMP_E("smc boot arg23, ret=%d\n", ret); 161 return ret; 162 } 163 164 finish: 165 ret = psci_cpu_on(cpu, entry); 166 if (ret) { 167 printf("cpu up failed, ret=%d\n", ret); 168 return ret; 169 } 170 printf("OK\n"); 171 172 return 0; 173 } 174 175 static int brought_up_amp(void *fit, int noffset, 176 boot_cpu_t *bootcpu, int is_linux) 177 { 178 const char *desc; 179 boot_args_t args; 180 u32 cpu, aarch64, hyp; 181 u32 load, thumb, us; 182 u32 pe_state, entry; 183 int data_size; 184 int ret; 185 u8 arch = -ENODATA; 186 187 desc = fdt_getprop(fit, noffset, "description", NULL); 188 cpu = fit_get_u32_default(fit, noffset, "cpu", -ENODATA); 189 hyp = fit_get_u32_default(fit, noffset, "hyp", 0); 190 thumb = fit_get_u32_default(fit, noffset, "thumb", 0); 191 load = fit_get_u32_default(fit, noffset, "load", -ENODATA); 192 us = fit_get_u32_default(fit, noffset, "udelay", 0); 193 fit_image_get_arch(fit, noffset, &arch); 194 fit_image_get_data_size(fit, noffset, &data_size); 195 memset(&args, 0, sizeof(args)); 196 197 if (!desc || cpu == -ENODATA || arch == -ENODATA || 198 (load == -ENODATA && !is_linux)) { 199 AMP_E("Property missing!\n"); 200 return -EINVAL; 201 } 202 aarch64 = (arch == IH_ARCH_ARM) ? 0 : 1; 203 pe_state = PE_STATE(aarch64, hyp, thumb, 0); 204 entry = load; 205 206 #ifdef DEBUG 207 AMP_I(" desc: %s\n", desc); 208 AMP_I(" cpu: 0x%x\n", cpu); 209 AMP_I(" aarch64: %d\n", aarch64); 210 AMP_I(" hyp: %d\n", hyp); 211 AMP_I(" thumb: %d\n", thumb); 212 AMP_I(" entry: 0x%08x\n", entry); 213 AMP_I(" pe_state: 0x%08x\n", pe_state); 214 AMP_I(" linux-os: %d\n\n", is_linux); 215 #endif 216 217 if ((read_mpidr() & 0x0fff) == cpu) { 218 bootcpu->arch = arch; 219 bootcpu->entry = entry; 220 bootcpu->state = pe_state; 221 bootcpu->linux_os = is_linux; 222 return 0; 223 } 224 225 /* === only nonboot cpu can reach here === */ 226 227 /* load or check */ 228 if (is_linux) { 229 ret = load_linux_for_nonboot_cpu(cpu, 230 aarch64, load, &entry, &args); 231 if (ret) 232 return ret; 233 /* 234 * Must setup before jump to linux. 235 * This is an appointment on RK amp solution to handle 236 * GIC configure competition. 237 */ 238 setup_sync_bits_for_linux(); 239 } else { 240 if (!sysmem_alloc_base_by_name(desc, 241 (phys_addr_t)load, data_size)) 242 return -ENXIO; 243 } 244 245 /* wakeup */ 246 ret = smc_cpu_on(cpu, pe_state, entry, &args); 247 if (ret) 248 return ret; 249 250 if (us) 251 udelay(us); 252 253 return 0; 254 } 255 256 static int brought_up_all_amp(void *fit, const char *fit_uname_cfg) 257 { 258 int loadables_index; 259 int linux_noffset; 260 int conf_noffset; 261 int cpu_noffset; 262 int ret; 263 const char *uname; 264 265 conf_noffset = fit_conf_get_node(fit, fit_uname_cfg); 266 if (conf_noffset < 0) 267 return conf_noffset; 268 269 linux_noffset = fdt_subnode_offset(fit, conf_noffset, "linux"); 270 if (linux_noffset > 0) { 271 ret = brought_up_amp(fit, linux_noffset, &g_bootcpu, 1); 272 if (ret) 273 return ret; 274 } 275 276 for (loadables_index = 0; 277 uname = fdt_stringlist_get(fit, conf_noffset, 278 FIT_LOADABLE_PROP, loadables_index, NULL), uname; 279 loadables_index++) { 280 cpu_noffset = fit_image_get_node(fit, uname); 281 if (cpu_noffset < 0) 282 return cpu_noffset; 283 284 ret = brought_up_amp(fit, cpu_noffset, &g_bootcpu, 0); 285 if (ret) 286 return ret; 287 } 288 289 /* === only boot cpu can reach here === */ 290 291 if (!g_bootcpu.linux_os) { 292 flush_dcache_all(); 293 AMP_I("Brought up cpu[%x, self] with state 0x%x, entry 0x%08x ...", 294 (u32)read_mpidr() & 0x0fff, g_bootcpu.state, g_bootcpu.entry); 295 cleanup_before_linux(); 296 printf("OK\n"); 297 armv8_switch_to_el2(0, 0, 0, g_bootcpu.state, (u64)g_bootcpu.entry, 298 g_bootcpu.arch == IH_ARCH_ARM ? ES_TO_AARCH32 : ES_TO_AARCH64); 299 } 300 301 /* return: boot cpu continue to boot linux */ 302 return 0; 303 } 304 305 int amp_cpus_on(void) 306 { 307 struct blk_desc *dev_desc; 308 bootm_headers_t images; 309 disk_partition_t part; 310 void *fit; 311 int ret = 0; 312 313 dev_desc = rockchip_get_bootdev(); 314 if (!dev_desc) 315 return -EIO; 316 317 if (part_get_info_by_name(dev_desc, AMP_PART, &part) < 0) 318 return -ENODEV; 319 320 fit = malloc(part.size * part.blksz); 321 if (!fit) { 322 AMP_E("No memory, please increase CONFIG_SYS_MALLOC_LEN\n"); 323 return -ENOMEM; 324 } 325 326 if (blk_dread(dev_desc, part.start, part.size, fit) != part.size) { 327 ret = -EIO; 328 goto out; 329 } 330 331 if (fdt_check_header(fit)) { 332 AMP_E("Not fit\n"); 333 ret = -EINVAL; 334 goto out; 335 } 336 337 /* Load loadables */ 338 memset(&images, 0, sizeof(images)); 339 images.fit_uname_cfg = "conf"; 340 images.fit_hdr_os = fit; 341 images.verify = 1; 342 ret = boot_get_loadable(0, NULL, &images, IH_ARCH_DEFAULT, NULL, NULL); 343 if (ret) { 344 AMP_E("Load loadables, ret=%d\n", ret); 345 goto out; 346 } 347 flush_dcache_all(); 348 349 /* Wakeup */ 350 ret = brought_up_all_amp(images.fit_hdr_os, images.fit_uname_cfg); 351 if (ret) 352 AMP_E("Brought up amps, ret=%d\n", ret); 353 out: 354 free(fit); 355 356 return ret; 357 } 358 359 int arm64_switch_amp_pe(bootm_headers_t *images) 360 { 361 images->os.arch = g_bootcpu.arch; 362 return g_bootcpu.state; 363 } 364 365