]>
git.ipfire.org Git - thirdparty/kernel/stable.git/blob - arch/riscv/kernel/setup.c
2 * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
3 * Chen Liqin <liqin.chen@sunplusct.com>
4 * Lennox Wu <lennox.wu@sunplusct.com>
5 * Copyright (C) 2012 Regents of the University of California
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, see the file COPYING, or write
19 * to the Free Software Foundation, Inc.,
22 #include <linux/init.h>
24 #include <linux/memblock.h>
25 #include <linux/sched.h>
26 #include <linux/console.h>
27 #include <linux/screen_info.h>
28 #include <linux/of_fdt.h>
29 #include <linux/of_platform.h>
30 #include <linux/sched/task.h>
31 #include <linux/swiotlb.h>
33 #include <asm/setup.h>
34 #include <asm/sections.h>
35 #include <asm/pgtable.h>
37 #include <asm/tlbflush.h>
38 #include <asm/thread_info.h>
40 #ifdef CONFIG_DUMMY_CONSOLE
41 struct screen_info screen_info
= {
42 .orig_video_lines
= 30,
43 .orig_video_cols
= 80,
45 .orig_video_ega_bx
= 0,
46 .orig_video_isVGA
= 1,
47 .orig_video_points
= 8
51 unsigned long va_pa_offset
;
52 EXPORT_SYMBOL(va_pa_offset
);
53 unsigned long pfn_base
;
54 EXPORT_SYMBOL(pfn_base
);
56 unsigned long empty_zero_page
[PAGE_SIZE
/ sizeof(unsigned long)] __page_aligned_bss
;
57 EXPORT_SYMBOL(empty_zero_page
);
59 /* The lucky hart to first increment this variable will boot the other cores */
60 atomic_t hart_lottery
;
61 unsigned long boot_cpu_hartid
;
63 void __init
parse_dtb(unsigned int hartid
, void *dtb
)
65 if (early_init_dt_scan(__va(dtb
)))
68 pr_err("No DTB passed to the kernel\n");
69 #ifdef CONFIG_CMDLINE_FORCE
70 strlcpy(boot_command_line
, CONFIG_CMDLINE
, COMMAND_LINE_SIZE
);
71 pr_info("Forcing kernel command line to: %s\n", boot_command_line
);
75 void __init
setup_arch(char **cmdline_p
)
77 init_mm
.start_code
= (unsigned long) _stext
;
78 init_mm
.end_code
= (unsigned long) _etext
;
79 init_mm
.end_data
= (unsigned long) _edata
;
80 init_mm
.brk
= (unsigned long) _end
;
82 *cmdline_p
= boot_command_line
;
88 unflatten_device_tree();
98 #ifdef CONFIG_DUMMY_CONSOLE
99 conswitchp
= &dummy_con
;