X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/d251b620d312e819923e55e223e0eb43b72a3bc6..21ffd87b228fa0bd0c25a09b710c6aeac8b81281:/lunaix-os/kernel/proc0.c diff --git a/lunaix-os/kernel/proc0.c b/lunaix-os/kernel/proc0.c index 542ef1c..3c2ea5f 100644 --- a/lunaix-os/kernel/proc0.c +++ b/lunaix-os/kernel/proc0.c @@ -1,18 +1,31 @@ -#include +#include #include +#include +#include +#include #include +#include +#include #include +#include #include #include #include #include #include #include -#include +#include #include +#include #include #include +#include +#include + +#include + +#include LOG_MODULE("PROC0") @@ -25,7 +38,66 @@ init_platform(); void lock_reserved_memory(); -// #define ENABLE_USER_MODE +void +unlock_reserved_memory(); + +void +__do_reserved_memory(int unlock); + +#define USE_DEMO +// #define DEMO_SIGNAL +// #define DEMO_READDIR +#define DEMO_IOTEST + +extern void +_pconsole_main(); + +extern void +_signal_demo_main(); + +extern void +_lxinit_main(); + +extern void +_readdir_main(); + +extern void +_iotest_main(); + +void __USER__ +__proc0_usr() +{ + // 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 stdout = open("/dev/tty", 0); + int stdin = dup2(stdout, 1); + + pid_t p; + if (!fork()) { + _pconsole_main(); + } + + 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(); +#else + _lxinit_main(); +#endif + } + + waitpid(p, 0, 0); + + while (1) { + yield(); + } +} /** * @brief LunaixOS的零号进程，该进程永远为可执行。 @@ -39,7 +111,9 @@ void __proc0() { init_platform(); -#ifdef ENABLE_USER_MODE + + init_proc_user_space(__current); + asm volatile("movw %0, %%ax\n" "movw %%ax, %%es\n" "movw %%ax, %%ds\n" @@ -52,16 +126,8 @@ __proc0() "retf" ::"i"(UDATA_SEG), "i"(USTACK_TOP & ~0xf), "i"(UCODE_SEG), - "r"(&&usr)); -#endif -usr: - if (!fork()) { - asm("jmp _lxinit_main"); - } - - while (1) { - yield(); - } + "r"(__proc0_usr) + : "eax", "memory"); } extern uint8_t __kernel_start; /* link/linker.ld */ @@ -72,46 +138,52 @@ extern multiboot_info_t* _k_init_mb_info; /* k_init.c */ void init_platform() { - assert_msg(kalloc_init(), "Fail to initialize heap"); - - size_t hhk_init_pg_count = ((uintptr_t)(&__init_hhk_end)) >> PG_SIZE_BITS; - kprintf(KINFO "[MM] Releaseing %d pages from 0x0.\n", hhk_init_pg_count); - - // Fuck it, I will no longer bother this little 1MiB - // I just release 4 pages for my APIC & IOAPIC remappings - for (size_t i = 0; i < 3; i++) { - vmm_del_mapping(PD_REFERENCED, (void*)(i << PG_SIZE_BITS)); - } - // 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(); - acpi_init(_k_init_mb_info); - uintptr_t ioapic_addr = acpi_get_context()->madt.ioapic->ioapic_addr; - pmm_mark_page_occupied( - KERNEL_PID, FLOOR(__APIC_BASE_PADDR, PG_SIZE_BITS), 0); - pmm_mark_page_occupied(KERNEL_PID, FLOOR(ioapic_addr, PG_SIZE_BITS), 0); - - vmm_set_mapping( - PD_REFERENCED, APIC_BASE_VADDR, __APIC_BASE_PADDR, PG_PREM_RW, VMAP_NULL); - vmm_set_mapping( - PD_REFERENCED, IOAPIC_BASE_VADDR, ioapic_addr, PG_PREM_RW, VMAP_NULL); + // we are using no kalloc! + // assert_msg(kalloc_init(), "Fail to initialize heap"); + rtc_init(); + acpi_init(_k_init_mb_info); apic_init(); ioapic_init(); timer_init(SYS_TIMER_FREQUENCY_HZ); clock_init(); ps2_kbd_init(); + pci_init(); + block_init(); + ahci_init(); + // ahci_list_device(); + // cake_stats(); syscall_install(); - for (size_t i = 256; i < hhk_init_pg_count; i++) { - vmm_del_mapping(PD_REFERENCED, (void*)(i << PG_SIZE_BITS)); + console_start_flushing(); + console_flush(); + + unlock_reserved_memory(); + + 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); } } 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 = @@ -119,18 +191,34 @@ lock_reserved_memory() // v_mapping mapping; for (unsigned int i = 0; i < map_size; i++) { multiboot_memory_map_t mmap = mmaps[i]; - if (mmap.type == MULTIBOOT_MEMORY_AVAILABLE) { + 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; } - uint8_t* pa = PG_ALIGN(mmap.addr_low); size_t pg_num = CEIL(mmap.len_low, PG_SIZE_BITS); - for (size_t j = 0; j < pg_num; j++) { - uintptr_t _pa = pa + (j << PG_SIZE_BITS); - // if (vmm_lookup(_pa, &mapping) && *mapping.pte) { - // continue; - // } - vmm_set_mapping(PD_REFERENCED, _pa, _pa, PG_PREM_R, VMAP_IGNORE); - pmm_mark_page_occupied(KERNEL_PID, _pa >> 12, 0); + 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