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/clint.h> 21 #include <asm/setup.h> 22 #include <asm/sections.h> 23 #include <asm/pgtable.h> 24 #include <asm/smp.h> 25 #include <asm/tlbflush.h> 26 #include <asm/thread_info.h> 27 #include <asm/kasan.h> 28 29 #include "head.h" 30 31 #ifdef CONFIG_DUMMY_CONSOLE 32 struct screen_info screen_info = { 33 .orig_video_lines = 30, 34 .orig_video_cols = 80, 35 .orig_video_mode = 0, 36 .orig_video_ega_bx = 0, 37 .orig_video_isVGA = 1, 38 .orig_video_points = 8 39 }; 40 #endif 41 42 /* The lucky hart to first increment this variable will boot the other cores */ 43 atomic_t hart_lottery; 44 unsigned long boot_cpu_hartid; 45 46 void __init parse_dtb(void) 47 { 48 if (early_init_dt_scan(dtb_early_va)) 49 return; 50 51 pr_err("No DTB passed to the kernel\n"); 52 #ifdef CONFIG_CMDLINE_FORCE 53 strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE); 54 pr_info("Forcing kernel command line to: %s\n", boot_command_line); 55 #endif 56 } 57 58 void __init setup_arch(char **cmdline_p) 59 { 60 init_mm.start_code = (unsigned long) _stext; 61 init_mm.end_code = (unsigned long) _etext; 62 init_mm.end_data = (unsigned long) _edata; 63 init_mm.brk = (unsigned long) _end; 64 65 *cmdline_p = boot_command_line; 66 67 parse_early_param(); 68 69 setup_bootmem(); 70 paging_init(); 71 unflatten_device_tree(); 72 clint_init_boot_cpu(); 73 74 #ifdef CONFIG_SWIOTLB 75 swiotlb_init(1); 76 #endif 77 78 #ifdef CONFIG_KASAN 79 kasan_init(); 80 #endif 81 82 #ifdef CONFIG_SMP 83 setup_smp(); 84 #endif 85 86 riscv_fill_hwcap(); 87 } 88