/* * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2020 Western Digital Corporation or its affiliates. * * Authors: * Anup Patel */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include extern const struct platform_override sifive_fu540; static const struct platform_override *special_platforms[] = { &sifive_fu540, }; static const struct platform_override *generic_plat = NULL; static const struct fdt_match *generic_plat_match = NULL; static void fw_platform_lookup_special(void *fdt, int root_offset) { int pos, noff; const struct platform_override *plat; const struct fdt_match *match; for (pos = 0; pos < array_size(special_platforms); pos++) { plat = special_platforms[pos]; if (!plat->match_table) continue; noff = fdt_find_match(fdt, -1, plat->match_table, &match); if (noff < 0) continue; generic_plat = plat; generic_plat_match = match; break; } } extern struct sbi_platform platform; static u32 generic_hart_index2id[SBI_HARTMASK_MAX_BITS] = { 0 }; /* * The fw_platform_init() function is called very early on the boot HART * OpenSBI reference firmwares so that platform specific code get chance * to update "platform" instance before it is used. * * The arguments passed to fw_platform_init() function are boot time state * of A0 to A4 register. The "arg0" will be boot HART id and "arg1" will * be address of FDT passed by previous booting stage. * * The return value of fw_platform_init() function is the FDT location. If * FDT is unchanged (or FDT is modified in-place) then fw_platform_init() * can always return the original FDT location (i.e. 'arg1') unmodified. */ unsigned long fw_platform_init(unsigned long arg0, unsigned long arg1, unsigned long arg2, unsigned long arg3, unsigned long arg4) { const char *model; void *fdt = (void *)arg1; u32 hartid, hart_count = 0; int rc, root_offset, cpus_offset, cpu_offset, len; root_offset = fdt_path_offset(fdt, "/"); if (root_offset < 0) goto fail; fw_platform_lookup_special(fdt, root_offset); model = fdt_getprop(fdt, root_offset, "model", &len); if (model) sbi_strncpy(platform.name, model, sizeof(platform.name)); if (generic_plat && generic_plat->features) platform.features = generic_plat->features(generic_plat_match); cpus_offset = fdt_path_offset(fdt, "/cpus"); if (cpus_offset < 0) goto fail; fdt_for_each_subnode(cpu_offset, fdt, cpus_offset) { rc = fdt_parse_hart_id(fdt, cpu_offset, &hartid); if (rc) continue; if (SBI_HARTMASK_MAX_BITS <= hartid) continue; generic_hart_index2id[hart_count++] = hartid; } platform.hart_count = hart_count; /* Return original FDT pointer */ return arg1; fail: while (1) wfi(); } static int generic_early_init(bool cold_boot) { int rc; if (generic_plat && generic_plat->early_init) { rc = generic_plat->early_init(cold_boot, generic_plat_match); if (rc) return rc; } if (!cold_boot) return 0; return fdt_reset_init(); } static int generic_final_init(bool cold_boot) { void *fdt; int rc; if (generic_plat && generic_plat->final_init) { rc = generic_plat->final_init(cold_boot, generic_plat_match); if (rc) return rc; } if (!cold_boot) return 0; fdt = sbi_scratch_thishart_arg1_ptr(); fdt_cpu_fixup(fdt); fdt_fixups(fdt); fdt_domain_fixup(fdt); if (generic_plat && generic_plat->fdt_fixup) { rc = generic_plat->fdt_fixup(fdt, generic_plat_match); if (rc) return rc; } return 0; } static void generic_early_exit(void) { if (generic_plat && generic_plat->early_exit) generic_plat->early_exit(generic_plat_match); } static void generic_final_exit(void) { if (generic_plat && generic_plat->final_exit) generic_plat->final_exit(generic_plat_match); } static int generic_domains_init(void) { return fdt_domains_populate(sbi_scratch_thishart_arg1_ptr()); } static u64 generic_tlbr_flush_limit(void) { if (generic_plat && generic_plat->tlbr_flush_limit) return generic_plat->tlbr_flush_limit(generic_plat_match); return SBI_PLATFORM_TLB_RANGE_FLUSH_LIMIT_DEFAULT; } static int generic_system_reset_check(u32 reset_type, u32 reset_reason) { if (generic_plat && generic_plat->system_reset_check) return generic_plat->system_reset_check(reset_type, reset_reason, generic_plat_match); return fdt_system_reset_check(reset_type, reset_reason); } static void generic_system_reset(u32 reset_type, u32 reset_reason) { if (generic_plat && generic_plat->system_reset) { generic_plat->system_reset(reset_type, reset_reason, generic_plat_match); return; } fdt_system_reset(reset_type, reset_reason); } const struct sbi_platform_operations platform_ops = { .early_init = generic_early_init, .final_init = generic_final_init, .early_exit = generic_early_exit, .final_exit = generic_final_exit, .domains_init = generic_domains_init, .console_putc = fdt_serial_putc, .console_getc = fdt_serial_getc, .console_init = fdt_serial_init, .irqchip_init = fdt_irqchip_init, .irqchip_exit = fdt_irqchip_exit, .ipi_send = fdt_ipi_send, .ipi_clear = fdt_ipi_clear, .ipi_init = fdt_ipi_init, .ipi_exit = fdt_ipi_exit, .get_tlbr_flush_limit = generic_tlbr_flush_limit, .timer_value = fdt_timer_value, .timer_event_stop = fdt_timer_event_stop, .timer_event_start = fdt_timer_event_start, .timer_init = fdt_timer_init, .timer_exit = fdt_timer_exit, .system_reset_check = generic_system_reset_check, .system_reset = generic_system_reset, }; struct sbi_platform platform = { .opensbi_version = OPENSBI_VERSION, .platform_version = SBI_PLATFORM_VERSION(0x0, 0x01), .name = "Generic", .features = SBI_PLATFORM_DEFAULT_FEATURES, .hart_count = SBI_HARTMASK_MAX_BITS, .hart_index2id = generic_hart_index2id, .hart_stack_size = SBI_PLATFORM_DEFAULT_HART_STACK_SIZE, .platform_ops_addr = (unsigned long)&platform_ops };