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/cpu_ops.h>
22 #include <asm/setup.h>
23 #include <asm/sections.h>
25 #include <asm/tlbflush.h>
26 #include <asm/thread_info.h>
27 #include <asm/kasan.h>
31 #ifdef CONFIG_DUMMY_CONSOLE
32 struct screen_info screen_info = {
33 .orig_video_lines = 30,
34 .orig_video_cols = 80,
36 .orig_video_ega_bx = 0,
37 .orig_video_isVGA = 1,
38 .orig_video_points = 8
43 * The lucky hart to first increment this variable will boot the other cores.
44 * This is used before the kernel initializes the BSS so it can't be in the
47 atomic_t hart_lottery __section(.sdata);
48 unsigned long boot_cpu_hartid;
49 static DEFINE_PER_CPU(struct cpu, cpu_devices);
51 void __init parse_dtb(void)
53 if (early_init_dt_scan(dtb_early_va))
56 pr_err("No DTB passed to the kernel\n");
57 #ifdef CONFIG_CMDLINE_FORCE
58 strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
59 pr_info("Forcing kernel command line to: %s\n", boot_command_line);
63 void __init setup_arch(char **cmdline_p)
65 init_mm.start_code = (unsigned long) _stext;
66 init_mm.end_code = (unsigned long) _etext;
67 init_mm.end_data = (unsigned long) _edata;
68 init_mm.brk = (unsigned long) _end;
70 *cmdline_p = boot_command_line;
76 #if IS_ENABLED(CONFIG_BUILTIN_DTB)
77 unflatten_and_copy_device_tree();
79 unflatten_device_tree();
90 #if IS_ENABLED(CONFIG_RISCV_SBI)
101 static int __init topology_init(void)
105 for_each_possible_cpu(i) {
106 struct cpu *cpu = &per_cpu(cpu_devices, i);
108 cpu->hotpluggable = cpu_has_hotplug(i);
109 register_cpu(cpu, i);
114 subsys_initcall(topology_init);