1 #include <lunaix/block.h>
2 #include <lunaix/common.h>
3 #include <lunaix/fctrl.h>
5 #include <lunaix/fs/twifs.h>
6 #include <lunaix/lunistd.h>
7 #include <lunaix/lxconsole.h>
8 #include <lunaix/mm/cake.h>
9 #include <lunaix/mm/pmm.h>
10 #include <lunaix/mm/valloc.h>
11 #include <lunaix/mm/vmm.h>
12 #include <lunaix/peripheral/ps2kbd.h>
13 #include <lunaix/proc.h>
14 #include <lunaix/spike.h>
15 #include <lunaix/syscall.h>
16 #include <lunaix/syslog.h>
17 #include <lunaix/types.h>
19 #include <hal/acpi/acpi.h>
20 #include <hal/ahci/ahci.h>
22 #include <hal/ioapic.h>
26 #include <arch/x86/boot/multiboot.h>
28 #include <klibc/string.h>
33 _lxinit_main(); /* lxinit.c */
39 lock_reserved_memory();
42 unlock_reserved_memory();
45 __do_reserved_memory(int unlock);
48 // #define DEMO_SIGNAL
70 // 打开tty设备(控制台),作为标准输入输出。
71 // tty设备属于序列设备(Sequential Device),该类型设备的上层读写
72 // 无须经过Lunaix的缓存层,而是直接下发到底层驱动。(不受FO_DIRECT的影响)
73 int stdout = open("/dev/tty", 0);
74 int stdin = dup2(stdout, 1);
84 #elif defined DEMO_SIGNAL
86 #elif defined DEMO_READDIR
88 #elif defined DEMO_IOTEST
103 * @brief LunaixOS的零号进程,该进程永远为可执行。
105 * 这主要是为了保证调度器在没有进程可调度时依然有事可做。
107 * 同时,该进程也负责fork出我们的init进程。
115 init_proc_user_space(__current);
117 asm volatile("movw %0, %%ax\n"
126 "retf" ::"i"(UDATA_SEG),
127 "i"(USTACK_TOP & ~0xf),
133 extern uint8_t __kernel_start; /* link/linker.ld */
134 extern uint8_t __kernel_end; /* link/linker.ld */
135 extern uint8_t __init_hhk_end; /* link/linker.ld */
136 extern multiboot_info_t* _k_init_mb_info; /* k_init.c */
141 // 锁定所有系统预留页(内存映射IO,ACPI之类的),并且进行1:1映射
142 lock_reserved_memory();
144 // we are using no kalloc!
145 // assert_msg(kalloc_init(), "Fail to initialize heap");
148 acpi_init(_k_init_mb_info);
151 timer_init(SYS_TIMER_FREQUENCY_HZ);
157 // ahci_list_device();
162 console_start_flushing();
165 unlock_reserved_memory();
167 for (size_t i = 0; i < (uintptr_t)(&__init_hhk_end); i += PG_SIZE) {
168 vmm_del_mapping(PD_REFERENCED, (void*)i);
169 pmm_free_page(KERNEL_PID, (void*)i);
174 lock_reserved_memory()
176 __do_reserved_memory(0);
180 unlock_reserved_memory()
182 __do_reserved_memory(1);
186 __do_reserved_memory(int unlock)
188 multiboot_memory_map_t* mmaps = _k_init_mb_info->mmap_addr;
190 _k_init_mb_info->mmap_length / sizeof(multiboot_memory_map_t);
191 // v_mapping mapping;
192 for (unsigned int i = 0; i < map_size; i++) {
193 multiboot_memory_map_t mmap = mmaps[i];
194 uint8_t* pa = PG_ALIGN(mmap.addr_low);
195 if (mmap.type == MULTIBOOT_MEMORY_AVAILABLE || pa <= MEM_4MB) {
196 // Don't fuck up our kernel code or any free area!
199 size_t pg_num = CEIL(mmap.len_low, PG_SIZE_BITS);
202 for (; j < pg_num; j++) {
203 uintptr_t _pa = pa + (j << PG_SIZE_BITS);
204 if (_pa >= KERNEL_MM_BASE) {
205 // Don't fuck up our kernel space!
208 vmm_set_mapping(PD_REFERENCED, _pa, _pa, PG_PREM_R, VMAP_NULL);
209 pmm_mark_page_occupied(
210 KERNEL_PID, _pa >> PG_SIZE_BITS, PP_FGLOCKED);
212 // Save the progress for later unmapping.
213 mmaps[i].len_low = j * PG_SIZE;
215 for (; j < pg_num; j++) {
216 uintptr_t _pa = pa + (j << PG_SIZE_BITS);
217 vmm_del_mapping(PD_REFERENCED, _pa);
218 if (mmap.type == MULTIBOOT_MEMORY_ACPI_RECLAIMABLE) {
219 pmm_mark_page_free(_pa >> PG_SIZE_BITS);