1 /* 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 6 * 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. 11 * 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. 16 * 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., 20 */ 21 22 #include <linux/init.h> 23 #include <linux/mm.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> 32 33 #include <asm/setup.h> 34 #include <asm/sections.h> 35 #include <asm/pgtable.h> 36 #include <asm/smp.h> 37 #include <asm/tlbflush.h> 38 #include <asm/thread_info.h> 39 40 #ifdef CONFIG_DUMMY_CONSOLE 41 struct screen_info screen_info = { 42 .orig_video_lines = 30, 43 .orig_video_cols = 80, 44 .orig_video_mode = 0, 45 .orig_video_ega_bx = 0, 46 .orig_video_isVGA = 1, 47 .orig_video_points = 8 48 }; 49 #endif 50 51 /* The lucky hart to first increment this variable will boot the other cores */ 52 atomic_t hart_lottery; 53 unsigned long boot_cpu_hartid; 54 55 void __init parse_dtb(phys_addr_t dtb_phys) 56 { 57 void *dtb = __va(dtb_phys); 58 59 if (early_init_dt_scan(dtb)) 60 return; 61 62 pr_err("No DTB passed to the kernel\n"); 63 #ifdef CONFIG_CMDLINE_FORCE 64 strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE); 65 pr_info("Forcing kernel command line to: %s\n", boot_command_line); 66 #endif 67 } 68 69 void __init setup_arch(char **cmdline_p) 70 { 71 init_mm.start_code = (unsigned long) _stext; 72 init_mm.end_code = (unsigned long) _etext; 73 init_mm.end_data = (unsigned long) _edata; 74 init_mm.brk = (unsigned long) _end; 75 76 *cmdline_p = boot_command_line; 77 78 parse_early_param(); 79 80 setup_bootmem(); 81 paging_init(); 82 unflatten_device_tree(); 83 84 #ifdef CONFIG_SWIOTLB 85 swiotlb_init(1); 86 #endif 87 88 #ifdef CONFIG_SMP 89 setup_smp(); 90 #endif 91 92 #ifdef CONFIG_DUMMY_CONSOLE 93 conswitchp = &dummy_con; 94 #endif 95 96 riscv_fill_hwcap(); 97 } 98