1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 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
 7 */
 8
 9#include <linux/init.h>
10#include <linux/mm.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
20#include <asm/setup.h>
21#include <asm/sections.h>
22#include <asm/pgtable.h>
23#include <asm/smp.h>
24#include <asm/tlbflush.h>
25#include <asm/thread_info.h>
26
27#include "head.h"
28
29#ifdef CONFIG_DUMMY_CONSOLE
30struct screen_info screen_info = {
31	.orig_video_lines	= 30,
32	.orig_video_cols	= 80,
33	.orig_video_mode	= 0,
34	.orig_video_ega_bx	= 0,
35	.orig_video_isVGA	= 1,
36	.orig_video_points	= 8
37};
38#endif
39
40/* The lucky hart to first increment this variable will boot the other cores */
41atomic_t hart_lottery;
42unsigned long boot_cpu_hartid;
43
44void __init parse_dtb(void)
45{
46	if (early_init_dt_scan(dtb_early_va))
47		return;
48
49	pr_err("No DTB passed to the kernel\n");
50#ifdef CONFIG_CMDLINE_FORCE
51	strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
52	pr_info("Forcing kernel command line to: %s\n", boot_command_line);
53#endif
54}
55
56void __init setup_arch(char **cmdline_p)
57{
58	init_mm.start_code = (unsigned long) _stext;
59	init_mm.end_code   = (unsigned long) _etext;
60	init_mm.end_data   = (unsigned long) _edata;
61	init_mm.brk        = (unsigned long) _end;
62
63	*cmdline_p = boot_command_line;
64
65	parse_early_param();
66
67	setup_bootmem();
68	paging_init();
69	unflatten_device_tree();
70
71#ifdef CONFIG_SWIOTLB
72	swiotlb_init(1);
73#endif
74
75#ifdef CONFIG_SMP
76	setup_smp();
77#endif
78
79#ifdef CONFIG_DUMMY_CONSOLE
80	conswitchp = &dummy_con;
81#endif
82
83	riscv_fill_hwcap();
84}