X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/20097445f742afff2c263431efcb1c8b596076a8..003db17f7a36a8098827f40df8fedc087b5a26f6:/lunaix-os/kernel/proc0.c diff --git a/lunaix-os/kernel/proc0.c b/lunaix-os/kernel/proc0.c index a2102ae..f2a8458 100644 --- a/lunaix-os/kernel/proc0.c +++ b/lunaix-os/kernel/proc0.c @@ -1,16 +1,27 @@ #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") @@ -23,6 +34,49 @@ init_platform(); void lock_reserved_memory(); +void +unlock_reserved_memory(); + +void +__do_reserved_memory(int unlock); + +//#define USE_DEMO +#define DEMO_SIGNAL + +extern void +_pconsole_main(); + +extern void +_signal_demo_main(); + +extern void +_lxinit_main(); + +void __USER__ +__proc0_usr() +{ + pid_t p; + if (!fork()) { + _pconsole_main(); + } + + if (!(p = fork())) { +#ifndef USE_DEMO + _exit(0); +#elif defined DEMO_SIGNAL + _signal_demo_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。 * @@ -35,11 +89,23 @@ void __proc0() { init_platform(); - if (!fork()) { - asm("jmp _lxinit_main"); - } - asm("1: jmp 1b"); + init_proc_user_space(__current); + + 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"); } extern uint8_t __kernel_start; /* link/linker.ld */ @@ -47,63 +113,130 @@ 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 */ +char test_sequence[] = "Once upon a time, in a magical land of Equestria. " + "There were two regal sisters who ruled together " + "and created harmony for all the land."; + void -init_platform() +__test_disk_io() { - assert_msg(kalloc_init(), "Fail to initialize heap"); + struct hba_port* port = ahci_get_port(0); + struct hba_device* dev = port->device; + char* buffer = vzalloc_dma(port->device->block_size); + strcpy(buffer, test_sequence); + kprintf("WRITE: %s\n", buffer); + int result; + + // 写入第一扇区 (LBA=0) + result = dev->ops.write_buffer(dev, 0, buffer, dev->block_size); + if (!result) { + kprintf(KWARN "fail to write: %x\n", dev->last_error); + } - 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); + memset(buffer, 0, dev->block_size); - // 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_unmap_page(KERNEL_PID, (void*)(i << PG_SIZE_BITS)); + // 读出我们刚刚写的内容！ + result = dev->ops.read_buffer(dev, 0, buffer, dev->block_size); + kprintf(KDEBUG "%x, %x\n", port->regs[HBA_RPxIS], port->regs[HBA_RPxTFD]); + if (!result) { + kprintf(KWARN "fail to read: %x\n", dev->last_error); + } else { + kprint_hex(buffer, 256); } + vfree_dma(buffer); +} + +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(); - 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(KERNEL_PID, APIC_BASE_VADDR, __APIC_BASE_PADDR, PG_PREM_RW); - vmm_set_mapping(KERNEL_PID, IOAPIC_BASE_VADDR, ioapic_addr, PG_PREM_RW); + assert_msg(kalloc_init(), "Fail to initialize heap"); + acpi_init(_k_init_mb_info); apic_init(); ioapic_init(); timer_init(SYS_TIMER_FREQUENCY_HZ); clock_init(); ps2_kbd_init(); + pci_init(); + ahci_init(); + // ahci_list_device(); + + fsm_init(); + vfs_init(); + twifs_init(); + + vfs_mount("/", "twifs", -1); + + //__test_disk_io(); + + // cake_stats(); syscall_install(); - for (size_t i = 256; i < hhk_init_pg_count; i++) { - vmm_unmap_page(KERNEL_PID, (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 = _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]; - 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++) { - vmm_set_mapping(KERNEL_PID, - (pa + (j << PG_SIZE_BITS)), - (pa + (j << PG_SIZE_BITS)), - PG_PREM_R); + 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