^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Chen Liqin <liqin.chen@sunplusct.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Lennox Wu <lennox.wu@sunplusct.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2012 Regents of the University of California
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/console.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/screen_info.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/of_fdt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/sched/task.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/swiotlb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/efi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/cpu_ops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/early_ioremap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <asm/sbi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <asm/tlbflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <asm/thread_info.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <asm/kasan.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <asm/efi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include "head.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #if defined(CONFIG_DUMMY_CONSOLE) || defined(CONFIG_EFI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct screen_info screen_info __section(".data") = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) .orig_video_lines = 30,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .orig_video_cols = 80,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .orig_video_mode = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .orig_video_ega_bx = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .orig_video_isVGA = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .orig_video_points = 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * The lucky hart to first increment this variable will boot the other cores.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * This is used before the kernel initializes the BSS so it can't be in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * BSS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) atomic_t hart_lottery __section(".sdata");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) unsigned long boot_cpu_hartid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static DEFINE_PER_CPU(struct cpu, cpu_devices);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static void __init parse_dtb(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /* Early scan of device tree from init memory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (early_init_dt_scan(dtb_early_va))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) pr_err("No DTB passed to the kernel\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #ifdef CONFIG_CMDLINE_FORCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) pr_info("Forcing kernel command line to: %s\n", boot_command_line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) void __init setup_arch(char **cmdline_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) parse_dtb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) init_mm.start_code = (unsigned long) _stext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) init_mm.end_code = (unsigned long) _etext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) init_mm.end_data = (unsigned long) _edata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) init_mm.brk = (unsigned long) _end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) *cmdline_p = boot_command_line;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) early_ioremap_setup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) jump_label_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) parse_early_param();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) efi_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) setup_bootmem();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) paging_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #if IS_ENABLED(CONFIG_BUILTIN_DTB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) unflatten_and_copy_device_tree();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (early_init_dt_verify(__va(dtb_early_pa)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) unflatten_device_tree();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) pr_err("No DTB found in kernel mappings\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #ifdef CONFIG_SWIOTLB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) swiotlb_init(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #ifdef CONFIG_KASAN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) kasan_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #if IS_ENABLED(CONFIG_RISCV_SBI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) sbi_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) setup_smp();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) riscv_fill_hwcap();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static int __init topology_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) for_each_possible_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct cpu *cpu = &per_cpu(cpu_devices, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) cpu->hotpluggable = cpu_has_hotplug(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) register_cpu(cpu, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) subsys_initcall(topology_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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