1 files changed, 134 insertions, 0 deletions
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
new file mode 100644
index 000000000..8e78a8ab6
--- /dev/null
+++ b/arch/riscv/kernel/setup.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ *  Chen Liqin <liqin.chen@sunplusct.com>
+ *  Lennox Wu <lennox.wu@sunplusct.com>
+ * Copyright (C) 2012 Regents of the University of California
+ */
+
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/memblock.h>
+#include <linux/sched.h>
+#include <linux/console.h>
+#include <linux/screen_info.h>
+#include <linux/of_fdt.h>
+#include <linux/of_platform.h>
+#include <linux/sched/task.h>
+#include <linux/swiotlb.h>
+#include <linux/smp.h>
+#include <linux/efi.h>
+
+#include <asm/cpu_ops.h>
+#include <asm/early_ioremap.h>
+#include <asm/setup.h>
+#include <asm/sections.h>
+#include <asm/sbi.h>
+#include <asm/tlbflush.h>
+#include <asm/thread_info.h>
+#include <asm/kasan.h>
+#include <asm/efi.h>
+
+#include "head.h"
+
+#if defined(CONFIG_DUMMY_CONSOLE) || defined(CONFIG_EFI)
+struct screen_info screen_info __section(".data") = {
+	.orig_video_lines	= 30,
+	.orig_video_cols	= 80,
+	.orig_video_mode	= 0,
+	.orig_video_ega_bx	= 0,
+	.orig_video_isVGA	= 1,
+	.orig_video_points	= 8
+};
+#endif
+
+/*
+ * The lucky hart to first increment this variable will boot the other cores.
+ * This is used before the kernel initializes the BSS so it can't be in the
+ * BSS.
+ */
+atomic_t hart_lottery __section(".sdata");
+unsigned long boot_cpu_hartid;
+static DEFINE_PER_CPU(struct cpu, cpu_devices);
+
+static void __init parse_dtb(void)
+{
+	/* Early scan of device tree from init memory */
+	if (early_init_dt_scan(dtb_early_va)) {
+		const char *name = of_flat_dt_get_machine_name();
+
+		if (name) {
+			pr_info("Machine model: %s\n", name);
+			dump_stack_set_arch_desc("%s (DT)", name);
+		}
+	} else {
+		pr_err("No DTB passed to the kernel\n");
+	}
+
+#ifdef CONFIG_CMDLINE_FORCE
+	strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+	pr_info("Forcing kernel command line to: %s\n", boot_command_line);
+#endif
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+	parse_dtb();
+	init_mm.start_code = (unsigned long) _stext;
+	init_mm.end_code   = (unsigned long) _etext;
+	init_mm.end_data   = (unsigned long) _edata;
+	init_mm.brk        = (unsigned long) _end;
+
+	*cmdline_p = boot_command_line;
+
+	early_ioremap_setup();
+	jump_label_init();
+	parse_early_param();
+
+	efi_init();
+	setup_bootmem();
+	paging_init();
+#if IS_ENABLED(CONFIG_BUILTIN_DTB)
+	unflatten_and_copy_device_tree();
+#else
+	if (early_init_dt_verify(__va(dtb_early_pa)))
+		unflatten_device_tree();
+	else
+		pr_err("No DTB found in kernel mappings\n");
+#endif
+	early_init_fdt_scan_reserved_mem();
+	misc_mem_init();
+
+#ifdef CONFIG_SWIOTLB
+	swiotlb_init(1);
+#endif
+
+#ifdef CONFIG_KASAN
+	kasan_init();
+#endif
+
+#if IS_ENABLED(CONFIG_RISCV_SBI)
+	sbi_init();
+#endif
+
+#ifdef CONFIG_SMP
+	setup_smp();
+#endif
+
+	riscv_fill_hwcap();
+}
+
+static int __init topology_init(void)
+{
+	int i;
+
+	for_each_possible_cpu(i) {
+		struct cpu *cpu = &per_cpu(cpu_devices, i);
+
+		cpu->hotpluggable = cpu_has_hotplug(i);
+		register_cpu(cpu, i);
+	}
+
+	return 0;
+}
+subsys_initcall(topology_init);