X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/290981180b9abc454e017271a8ebe75478c00e86..1fe5f5eb5378a47bf0f3451762743c162e40faad:/lunaix-os/kernel/proc0.c diff --git a/lunaix-os/kernel/proc0.c b/lunaix-os/kernel/proc0.c index 14e4862..64dbcd9 100644 --- a/lunaix-os/kernel/proc0.c +++ b/lunaix-os/kernel/proc0.c @@ -1,9 +1,11 @@ #include +#include #include -#include +#include +#include #include +#include #include -#include #include #include #include @@ -11,107 +13,57 @@ #include #include #include -#include #include #include #include #include + #include #include #include -#include -#include #include -#include - -#include #include -#include - LOG_MODULE("PROC0") -extern void -_lxinit_main(); /* lxinit.c */ - void init_platform(); -void -lock_reserved_memory(); - -void -unlock_reserved_memory(); - -void -__do_reserved_memory(int unlock); - -#define USE_DEMO -// #define DEMO_SIGNAL -// #define DEMO_READDIR -// #define DEMO_IOTEST -// #define DEMO_INPUT_TEST -#define DEMO_SIMPLE_SH - -extern void -_pconsole_main(); - -extern void -_signal_demo_main(); - -extern void -_lxinit_main(); - -extern void -_readdir_main(); - -extern void -_iotest_main(); +int +mount_bootmedium() +{ + struct v_dnode* dnode; + int errno = 0; + struct device* dev = probe_boot_medium(); + if (!dev) { + kprintf(KERROR "fail to acquire device. (%d)", errno); + return 0; + } -extern void -input_test(); + if ((errno = vfs_mount("/mnt/lunaix-os", "iso9660", dev, 0))) { + kprintf(KERROR "fail to mount boot medium. (%d)", errno); + return 0; + } -extern void -sh_main(); + return 1; +} -void __USER__ -__proc0_usr() +int +exec_initd() { - // 打开tty设备(控制台)，作为标准输入输出。 - // tty设备属于序列设备（Sequential Device），该类型设备的上层读写 - // 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） - int fdstdout = open("/dev/tty", 0); - int fdstdin = dup2(stdout, 1); - - pid_t p; - - if (!(p = fork())) { -#ifndef USE_DEMO - _exit(0); -#elif defined DEMO_SIGNAL - _signal_demo_main(); -#elif defined DEMO_READDIR - _readdir_main(); -#elif defined DEMO_IOTEST - _iotest_main(); -#elif defined DEMO_INPUT_TEST - input_test(); -#elif defined DEMO_SIMPLE_SH - sh_main(); -#else - _lxinit_main(); -#endif - printf("==== test end ====\n"); - _exit(0); + int errno = 0; + + if ((errno = exec_kexecve("/mnt/lunaix-os/usr/bin/init", NULL, NULL))) { + goto fail; } - waitpid(p, 0, 0); + fail("should not reach"); - while (1) { - yield(); - } +fail: + kprintf(KERROR "fail to load initd. (%d)", errno); + return 0; } /** @@ -125,130 +77,45 @@ __proc0_usr() void __proc0() { + /* + * We must defer boot code/data cleaning after we successfully escape that + * area + */ + boot_cleanup(); + init_platform(); init_proc_user_space(__current); - // user space - asm volatile("movw %0, %%ax\n" - "movw %%ax, %%es\n" - "movw %%ax, %%ds\n" - "movw %%ax, %%fs\n" - "movw %%ax, %%gs\n" - "pushl %0\n" - "pushl %1\n" - "pushl %2\n" - "pushl %3\n" - "retf" ::"i"(UDATA_SEG), - "i"(USTACK_TOP & ~0xf), - "i"(UCODE_SEG), - "r"(__proc0_usr) - : "eax", "memory"); + if (!mount_bootmedium() || !exec_initd()) { + while (1) { + asm("hlt"); + } + // should not reach + } } -extern uint8_t __kernel_start; /* link/linker.ld */ -extern uint8_t __kernel_end; /* link/linker.ld */ -extern uint8_t __init_hhk_end; /* link/linker.ld */ -extern multiboot_info_t* _k_init_mb_info; /* k_init.c */ - void init_platform() { - // 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 - lock_reserved_memory(); + kprintf(KINFO "\033[11;0mLunaixOS (gcc v%s, %s)\033[39;49m\n", + __VERSION__, + __TIME__); - // firmware - acpi_init(_k_init_mb_info); + twifs_register_plugins(); - // die - apic_init(); - ioapic_init(); + /* we must start probing pci after all drivers are registered! */ + pci_load_devices(); // debugger serial_init(); sdbg_init(); - // timers & clock - rtc_init(); - timer_init(SYS_TIMER_FREQUENCY_HZ); - clock_init(); - + // FIXME ps2 kbd is x86 PC specific, not here. // peripherals & chipset features ps2_kbd_init(); - pci_init(); - block_init(); - ahci_init(); // console console_start_flushing(); console_flush(); - - // expose cake allocator states to vfs - cake_export(); - - unlock_reserved_memory(); - - // clean up - for (size_t i = 0; i < (uintptr_t)(&__init_hhk_end); i += PG_SIZE) { - vmm_del_mapping(PD_REFERENCED, (void*)i); - pmm_free_page(KERNEL_PID, (void*)i); - } - - // reserve higher half - for (size_t i = L1_INDEX(KERNEL_MM_BASE); i < 1023; i++) { - vmm_set_mapping(PD_REFERENCED, i << 22, 0, 0, VMAP_NOMAP); - } -} - -void -lock_reserved_memory() -{ - __do_reserved_memory(0); -} - -void -unlock_reserved_memory() -{ - __do_reserved_memory(1); -} - -void -__do_reserved_memory(int unlock) -{ - multiboot_memory_map_t* mmaps = _k_init_mb_info->mmap_addr; - size_t map_size = - _k_init_mb_info->mmap_length / sizeof(multiboot_memory_map_t); - // v_mapping mapping; - for (unsigned int i = 0; i < map_size; i++) { - multiboot_memory_map_t mmap = mmaps[i]; - uint8_t* pa = PG_ALIGN(mmap.addr_low); - if (mmap.type == MULTIBOOT_MEMORY_AVAILABLE || pa <= MEM_4MB) { - // Don't fuck up our kernel code or any free area! - continue; - } - size_t pg_num = CEIL(mmap.len_low, PG_SIZE_BITS); - size_t j = 0; - if (!unlock) { - for (; j < pg_num; j++) { - uintptr_t _pa = pa + (j << PG_SIZE_BITS); - if (_pa >= KERNEL_MM_BASE) { - // Don't fuck up our kernel space! - break; - } - vmm_set_mapping(PD_REFERENCED, _pa, _pa, PG_PREM_R, VMAP_NULL); - pmm_mark_page_occupied( - KERNEL_PID, _pa >> PG_SIZE_BITS, PP_FGLOCKED); - } - // Save the progress for later unmapping. - mmaps[i].len_low = j * PG_SIZE; - } else { - for (; j < pg_num; j++) { - uintptr_t _pa = pa + (j << PG_SIZE_BITS); - vmm_del_mapping(PD_REFERENCED, _pa); - if (mmap.type == MULTIBOOT_MEMORY_ACPI_RECLAIMABLE) { - pmm_mark_page_free(_pa >> PG_SIZE_BITS); - } - } - } - } } \ No newline at end of file