コード例 #1
0
void TerminateProcess () {
	process* cur = &_proc;
	if (cur->id==PROC_INVALID_ID)
		return;

	/* release threads */
	int i=0;
	thread* pThread = &cur->threads[i];

	/* get physical address of stack */
	void* stackFrame = vmmngr_getPhysicalAddress (cur->pageDirectory,
		(uint32_t) pThread->initialStack); 

	/* unmap and release stack memory */
	vmmngr_unmapPhysicalAddress (cur->pageDirectory, (uint32_t) pThread->initialStack);
	pmmngr_free_block (stackFrame);

	/* unmap and release image memory */
	for (uint32_t page = 0; page < pThread->imageSize/PAGE_SIZE; page++) {
		uint32_t phys = 0;
		uint32_t virt = 0;

		/* get virtual address of page */
		virt = pThread->imageBase + (page * PAGE_SIZE);

		/* get physical address of page */
		phys = (uint32_t) vmmngr_getPhysicalAddress (cur->pageDirectory, virt);

		/* unmap and release page */
		vmmngr_unmapPhysicalAddress (cur->pageDirectory, virt);
		pmmngr_free_block ((void*)phys);
	}

	/* restore kernel selectors */
	__asm {
		cli
		mov eax, 0x10
		mov ds, ax
		mov es, ax
		mov fs, ax
		mov gs, ax
		sti
	}

	/* return to kernel command shell */
	run ();

	DebugPrintf ("\nExit command recieved; demo halted");
	for (;;);
}
コード例 #2
0
ファイル: mmngr_virtual.c プロジェクト: cjo20/cos
void vmmngr_free_page(virtual_addr addr)
{
	pt_entry * pte;

	pte = (pt_entry *) ((uint32_t) vmmngr_get_ptable_address(addr) + PAGE_TABLE_INDEX(addr));

	pmmngr_free_block((void *) pt_entry_pfn(*pte));

	pt_entry_del_attrib(pte, I86_PTE_PRESENT);
}
コード例 #3
0
error_t vmmngr_pdirectory_clear(pdirectory* pdir)
{
	for (int i = 0; i < TABLES_PER_DIR; i++)
	{
		if (vmmngr_ptable_clear((ptable*)pd_entry_get_frame(pdir->entries[i])) != ERROR_OK)
			return ERROR_OCCUR;
	}

	memset(pdir, 0, sizeof(pdirectory));
	pmmngr_free_block(pdir);

	return ERROR_OK;
}
コード例 #4
0
error_t vmmngr_ptable_clear(ptable* table)
{
	if (!table)
	{
		set_last_error(EINVAL, VMEM_BAD_ARGUMENT, EO_VMMNGR);
		return ERROR_OCCUR;
	}

	memset(table, 0, sizeof(ptable));
	pmmngr_free_block(table);

	return ERROR_OK;
}
コード例 #5
0
error_t vmmngr_free_page(pt_entry* entry)
{
	if (!entry)
	{
		set_last_error(EINVAL, VMEM_BAD_ARGUMENT, EO_VMMNGR);
		return ERROR_OCCUR;
	}

	void* addr = (void*)pt_entry_get_frame(*entry);

	if (addr)
		pmmngr_free_block(addr);

	pt_entry_del_attrib(entry, I86_PTE_PRESENT);
	pt_entry_del_attrib(entry, I86_PTE_WRITABLE);

	return ERROR_OK;
}
コード例 #6
0
ファイル: main.cpp プロジェクト: Danielnkf/KinXOS
int _cdecl kmain (multiboot_info* bootinfo) {

	//! get kernel size passed from boot loader
	uint32_t kernelSize=0;
	_asm mov	word ptr [kernelSize], dx

	//! make demo look nice :)
	DebugClrScr (0x13);
	DebugGotoXY (0,0);

	DebugSetColor (0x3F);
	DebugPrintf ("                    ~[ Physical Memory Manager Demo ]~                          ");

	DebugGotoXY (0,24);
	DebugSetColor (0x3F);
	DebugPrintf ("                                                                                ");

	DebugGotoXY (0,2);
	DebugSetColor (0x17);

	//! initialize hal
	hal_initialize ();

	//! enable interrupts and install exception handlers
	enable ();
	setvect (0,(void (__cdecl &)(void))divide_by_zero_fault);
	setvect (1,(void (__cdecl &)(void))single_step_trap);
	setvect (2,(void (__cdecl &)(void))nmi_trap);
	setvect (3,(void (__cdecl &)(void))breakpoint_trap);
	setvect (4,(void (__cdecl &)(void))overflow_trap);
	setvect (5,(void (__cdecl &)(void))bounds_check_fault);
	setvect (6,(void (__cdecl &)(void))invalid_opcode_fault);
	setvect (7,(void (__cdecl &)(void))no_device_fault);
	setvect (8,(void (__cdecl &)(void))double_fault_abort);
	setvect (10,(void (__cdecl &)(void))invalid_tss_fault);
	setvect (11,(void (__cdecl &)(void))no_segment_fault);
	setvect (12,(void (__cdecl &)(void))stack_fault);
	setvect (13,(void (__cdecl &)(void))general_protection_fault);
	setvect (14,(void (__cdecl &)(void))page_fault);
	setvect (16,(void (__cdecl &)(void))fpu_fault);
	setvect (17,(void (__cdecl &)(void))alignment_check_fault);
	setvect (18,(void (__cdecl &)(void))machine_check_abort);
	setvect (19,(void (__cdecl &)(void))simd_fpu_fault);

	//! get memory size in KB
	uint32_t memSize = 1024 + bootinfo->m_memoryLo + bootinfo->m_memoryHi*64;

	//! initialize the physical memory manager
	//! we place the memory bit map used by the PMM at the end of the kernel in memory
	pmmngr_init (memSize, 0x100000 + kernelSize*512);

	DebugPrintf("pmm initialized with %i KB physical memory; memLo: %i memHi: %i\n\n",
		memSize,bootinfo->m_memoryLo,bootinfo->m_memoryHi);

	DebugSetColor (0x19);
	DebugPrintf ("Physical Memory Map:\n");

	memory_region*	region = (memory_region*)0x1000;

	for (int i=0; i<15; ++i) {

		//! sanity check; if type is > 4 mark it reserved
		if (region[i].type>4)
			region[i].type=1;

		//! if start address is 0, there is no more entries, break out
		if (i>0 && region[i].startLo==0)
			break;

		//! display entry
		DebugPrintf ("region %i: start: 0x%x%x length (bytes): 0x%x%x type: %i (%s)\n", i, 
			region[i].startHi, region[i].startLo,
			region[i].sizeHi,region[i].sizeLo,
			region[i].type, strMemoryTypes[region[i].type-1]);

		//! if region is avilable memory, initialize the region for use
		if (region[i].type==1)
			pmmngr_init_region (region[i].startLo, region[i].sizeLo);
	}

	//! deinit the region the kernel is in as its in use
	pmmngr_deinit_region (0x100000, kernelSize*512);

	DebugSetColor (0x17);

	DebugPrintf ("\npmm regions initialized: %i allocation blocks; used or reserved blocks: %i\nfree blocks: %i\n",
		pmmngr_get_block_count (),  pmmngr_get_use_block_count (), pmmngr_get_free_block_count () );

	//! allocating and deallocating memory examples...

	DebugSetColor (0x12);

	uint32_t* p = (uint32_t*)pmmngr_alloc_block ();
	DebugPrintf ("\np allocated at 0x%x", p);

	uint32_t* p2 = (uint32_t*)pmmngr_alloc_blocks (2);
	DebugPrintf ("\nallocated 2 blocks for p2 at 0x%x", p2);

	pmmngr_free_block (p);
	p = (uint32_t*)pmmngr_alloc_block ();
	DebugPrintf ("\nUnallocated p to free block 1. p is reallocated to 0x%x", p);

	pmmngr_free_block (p);
	pmmngr_free_blocks (p2, 2);
	return 0;
}
コード例 #7
0
ファイル: task.cpp プロジェクト: pdpdds/OrangeOS
void TerminateProcess () {
	
	Process* cur = ProcessManager::GetInstance()->g_pCurProcess;
	
	if (cur->TaskID == PROC_INVALID_ID)
	{
		DebugPrintf("\nsdffdsdsfsd");
		return;
	}

	/* release threads */
	int i=0;
	//Thread* pThread = ProcessManager::GetInstance()->g_pThread;
	Thread* pThread = (Thread*)List_GetData(cur->pThreadQueue, "", 0);
	List_Delete(&cur->pThreadQueue, "", 0);

	u32int heapAddess = pThread->imageBase + pThread->imageSize + PAGE_SIZE + PAGE_SIZE * 2;
	heapAddess = heapAddess - (heapAddess % PAGE_SIZE);
	for (int i = 0; i < 300; i++)
	{
		uint32_t phys = 0;
		uint32_t virt = 0;

		/* get virtual address of page */
		virt = heapAddess + (i * PAGE_SIZE);

		/* get physical address of page */
		phys = (uint32_t)vmmngr_getPhysicalAddress(cur->pPageDirectory, virt);

		/* unmap and release page */
		vmmngr_unmapPhysicalAddress(cur->pPageDirectory, virt);
	}

	/* unmap and release image memory */
	for (uint32_t page = 0; page < cur->dwPageCount; page++) {
		uint32_t phys = 0;
		uint32_t virt = 0;

		/* get virtual address of page */
		virt = pThread->imageBase + (page * PAGE_SIZE);

		/* get physical address of page */
		phys = (uint32_t)vmmngr_getPhysicalAddress(cur->pPageDirectory, virt);

		/* unmap and release page */
		vmmngr_unmapPhysicalAddress(cur->pPageDirectory, virt);
		//pmmngr_free_block ((void*)phys);
	}

	/* get physical address of stack */
	void* stackFrame = vmmngr_getPhysicalAddress(cur->pPageDirectory,
		(uint32_t)pThread->initialStack);

	/* unmap and release stack memory */
	vmmngr_unmapPhysicalAddress(cur->pPageDirectory, (uint32_t)pThread->initialStack);
	//pmmngr_free_block(stackFrame);

	pmmngr_free_block(cur->pPageDirectory);

	delete pThread;
	delete cur;

	/* restore kernel selectors */
	__asm {
		cli
		mov eax, 0x10
		mov ds, ax
		mov es, ax
		mov fs, ax
		mov gs, ax
		sti
	}

	pmmngr_load_PDBR((physical_addr)vmmngr_get_directory());

	/* return to kernel command shell */
	run ();

	DebugPrintf ("\nExit command recieved; demo halted");
	for (;;);
}
コード例 #8
0
ファイル: mmngr_virtual.c プロジェクト: cjo20/cos
void vmmngr_initialize(physical_addr dir_address)
{
	int i = 0;
	int frame = 0;
	int virt = 0;

	ptable * table = (ptable *) pmmngr_alloc_block();
	if (!table)
	{
		return;
	}

	ptable * table2 = (ptable *) pmmngr_alloc_block();
	if (!table2)
	{
		pmmngr_free_block(table);
		return;
	}	

	memset(table, 0, sizeof(ptable));

	for (i = 0, frame = 0x0, virt = 0x00000000; i < 1024; ++i, frame+=4096, virt+=4096)
	{
		pt_entry page = 0;
		pt_entry_add_attrib(&page, I86_PTE_PRESENT);
		pt_entry_set_frame(&page, frame);

		table->m_entries[PAGE_TABLE_INDEX(virt)] = page;
	}

	for (i = 0, frame = 0x0, virt = 0xc0000000; i < 1024; ++i, frame+=4096, virt+=4096)
	{
		pt_entry page = 0;
		pt_entry_add_attrib(&page, I86_PTE_PRESENT);
		pt_entry_set_frame(&page, frame);

		table2->m_entries[PAGE_TABLE_INDEX(virt)] = page;
	}

	pdirectory * dir = (pdirectory *) dir_address;// pmmngr_alloc_block();

	if (!dir)
	{
		pmmngr_free_block(table);
		pmmngr_free_block(table2);
		return;
	}

	memset(dir, 0, sizeof(pdirectory));

	pd_entry * entry = &dir->m_entries[PAGE_DIRECTORY_INDEX(0x00000000)];
	pd_entry_add_attrib(entry, I86_PDE_PRESENT);
	pd_entry_add_attrib(entry, I86_PDE_WRITABLE);
	pd_entry_set_frame(entry, (physical_addr) table);

	pd_entry * entry2 = &dir->m_entries[PAGE_DIRECTORY_INDEX(0xc0000000)];
	pd_entry_add_attrib(entry2, I86_PDE_PRESENT);
	pd_entry_add_attrib(entry2, I86_PDE_WRITABLE);
	pd_entry_set_frame(entry2, (physical_addr) table2);

	pd_entry * entry3 = &dir->m_entries[PAGE_DIRECTORY_INDEX(0xFFC00000)];
	pd_entry_add_attrib(entry3, I86_PDE_PRESENT);
	pd_entry_add_attrib(entry3, I86_PDE_WRITABLE);
	pd_entry_set_frame(entry3, (physical_addr) dir);

	vmmngr_switch_pdirectory(dir);
	pmmngr_paging_enable(1);

}
コード例 #9
0
ファイル: kernel.c プロジェクト: BGCX262/zygote-svn-to-git
int _k_main(struct multiboot_info *bootinfo)
{
	int i;
	uint32_t memSize;
	struct memory_region*  region;
	uint32_t *p,*p2;

	/*Initialize hardware drivers*/
	hw_initialize();

	//! install our exception handlers
	setvect (0,  divide_by_zero_fault);
	setvect (1,  single_step_trap);
	setvect (2,  nmi_trap);
	setvect (3,  breakpoint_trap);
	setvect (4,  overflow_trap);
	setvect (5,  bounds_check_fault);
	setvect (6,  invalid_opcode_fault);
	setvect (7,  no_device_fault);
	setvect (8,  double_fault_abort);
	setvect (10, invalid_tss_fault);
	setvect (11, no_segment_fault);
	setvect (12, stack_fault);
	setvect (13, general_protection_fault);
	setvect (14, page_fault);
	setvect (16, fpu_fault);
	setvect (17, alignment_check_fault);
	setvect (18, machine_check_abort);
	setvect (19, simd_fpu_fault);

	ClrScr (0x13);
	GotoXY (0,0);
	SetColor (0x12);

	Puts ("\n		     zygote OS v0.01\n");
	SetColor (0x17);
/*	Puts ("Enabled A20!\n");
	Puts ("Initialized GDT and IDT!\n");
	Puts ("Installed PIC, PIT, and exception handlers!\n");
	Printf ("Cpu vender: %s \n", get_cpu_vender ());*/

	//! get memory size in KB
	memSize = 1024 + bootinfo->m_memoryLo + bootinfo->m_memoryHi*64;
	
	//! initialize the physical memory manager
	//! we place the memory bit map used by the PMM at the end of the kernel in memory
	pmmngr_init (memSize, 0x100000);

	Printf("pmm initialized with %i KB physical memory; memLo: %i memHi: %i\n",
	memSize,bootinfo->m_memoryLo,bootinfo->m_memoryHi);

	SetColor (0x19);
	Printf ("Physical Memory Map:\n");

	region = (struct memory_region*)0x1000;

	for (i=0; i<15; ++i) {

		//! sanity check; if type is > 4 mark it reserved
		if (region[i].type>4)
			region[i].type=1;

		//! if start address is 0, there is no more entries, break out
		if (i>0 && region[i].startLo==0)
			break;

		//! display entry
		Printf ("region %i: start: 0x%x%x length (bytes): 0x%x%x type: %i (%s)\n", i, 
			region[i].startHi, region[i].startLo,
			region[i].sizeHi,region[i].sizeLo,
			region[i].type, strMemoryTypes[region[i].type-1]);

		//! if region is avilable memory, initialize the region for use
		if (region[i].type==1)
			pmmngr_init_region (region[i].startLo, region[i].sizeLo);
	}

	SetColor (0x17);

	Printf ("\npmm regions initialized: %i allocation blocks; used or reserved blocks: %i\nfree blocks: %i\n",
		pmmngr_get_block_count (),  pmmngr_get_use_block_count (), pmmngr_get_free_block_count () );

	//! allocating and deallocating memory examples...

	SetColor (0x12);

	p = (uint32_t*)pmmngr_alloc_block ();
	Printf ("\np allocated at 0x%x", p);

	p2 = (uint32_t*)pmmngr_alloc_blocks (2);
	Printf ("\nallocated 2 blocks for p2 at 0x%x", p2);

	pmmngr_free_block (p);
	p = (uint32_t*)pmmngr_alloc_block ();
	Printf ("\nUnallocated p to free block 1. p is reallocated to 0x%x", p);

	pmmngr_free_block (p);
	pmmngr_free_blocks (p2, 2);

	//To test divide by zero exception
	//i = 10/0;
	Puts ("\nHitting any key will fire the default handlers \n");
	for(;;) {
	}
	
};