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 #ifdef CONFIG_DUMMY_CONSOLE 28 struct screen_info screen_info = { 29 .orig_video_lines = 30, 30 .orig_video_cols = 80, 31 .orig_video_mode = 0, 32 .orig_video_ega_bx = 0, 33 .orig_video_isVGA = 1, 34 .orig_video_points = 8 35 }; 36 #endif 37 38 /* The lucky hart to first increment this variable will boot the other cores */ 39 atomic_t hart_lottery; 40 unsigned long boot_cpu_hartid; 41 42 void __init parse_dtb(phys_addr_t dtb_phys) 43 { 44 void *dtb = __va(dtb_phys); 45 46 if (early_init_dt_scan(dtb)) 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 56 void __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 } 85