1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
4 * Chen Liqin <liqin.chen@sunplusct.com>
5 * Lennox Wu <lennox.wu@sunplusct.com>
6 * Copyright (C) 2012 Regents of the University of California
9 #include <linux/init.h>
11 #include <linux/memblock.h>
12 #include <linux/sched.h>
13 #include <linux/console.h>
14 #include <linux/screen_info.h>
15 #include <linux/of_fdt.h>
16 #include <linux/of_platform.h>
17 #include <linux/sched/task.h>
18 #include <linux/swiotlb.h>
19 #include <linux/smp.h>
21 #include <asm/clint.h>
22 #include <asm/cpu_ops.h>
23 #include <asm/setup.h>
24 #include <asm/sections.h>
26 #include <asm/tlbflush.h>
27 #include <asm/thread_info.h>
28 #include <asm/kasan.h>
32 #ifdef CONFIG_DUMMY_CONSOLE
33 struct screen_info screen_info = {
34 .orig_video_lines = 30,
35 .orig_video_cols = 80,
37 .orig_video_ega_bx = 0,
38 .orig_video_isVGA = 1,
39 .orig_video_points = 8
44 * The lucky hart to first increment this variable will boot the other cores.
45 * This is used before the kernel initializes the BSS so it can't be in the
48 atomic_t hart_lottery __section(.sdata);
49 unsigned long boot_cpu_hartid;
50 static DEFINE_PER_CPU(struct cpu, cpu_devices);
52 void __init parse_dtb(void)
54 if (early_init_dt_scan(dtb_early_va))
57 pr_err("No DTB passed to the kernel\n");
58 #ifdef CONFIG_CMDLINE_FORCE
59 strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
60 pr_info("Forcing kernel command line to: %s\n", boot_command_line);
64 void __init setup_arch(char **cmdline_p)
66 init_mm.start_code = (unsigned long) _stext;
67 init_mm.end_code = (unsigned long) _etext;
68 init_mm.end_data = (unsigned long) _edata;
69 init_mm.brk = (unsigned long) _end;
71 *cmdline_p = boot_command_line;
77 #if IS_ENABLED(CONFIG_BUILTIN_DTB)
78 unflatten_and_copy_device_tree();
80 unflatten_device_tree();
82 clint_init_boot_cpu();
92 #if IS_ENABLED(CONFIG_RISCV_SBI)
103 static int __init topology_init(void)
107 for_each_possible_cpu(i) {
108 struct cpu *cpu = &per_cpu(cpu_devices, i);
110 cpu->hotpluggable = cpu_has_hotplug(i);
111 register_cpu(cpu, i);
116 subsys_initcall(topology_init);