#include <IOKit/system.h>
#include <mach/sync_policy.h>
#include <machine/machine_routines.h>
#include <libkern/c++/OSCPPDebug.h>
#include <IOKit/assert.h>
#include <IOKit/IOReturn.h>
#include <IOKit/IOLib.h>
#include <IOKit/IOKitDebug.h>
mach_timespec_t IOZeroTvalspec = { 0, 0 };
static IOThreadFunc threadArgFcn;
static void * threadArgArg;
static lock_t * threadArgLock;
enum { kIOMaxPageableMaps = 16 };
enum { kIOPageableMapSize = 16 * 1024 * 1024 };
enum { kIOPageableMaxMapSize = 64 * 1024 * 1024 };
typedef struct {
vm_map_t map;
vm_offset_t address;
vm_offset_t end;
} IOMapData;
static struct {
UInt32 count;
UInt32 hint;
IOMapData maps[ kIOMaxPageableMaps ];
mutex_t * lock;
} gIOKitPageableSpace;
void IOLibInit(void)
{
kern_return_t ret;
static bool libInitialized;
if(libInitialized)
return;
threadArgLock = lock_alloc( true, NULL, NULL );
gIOKitPageableSpace.maps[0].address = 0;
ret = kmem_suballoc(kernel_map,
&gIOKitPageableSpace.maps[0].address,
kIOPageableMapSize,
TRUE,
TRUE,
&gIOKitPageableSpace.maps[0].map);
if (ret != KERN_SUCCESS)
panic("failed to allocate iokit pageable map\n");
gIOKitPageableSpace.lock = mutex_alloc( 0 );
gIOKitPageableSpace.maps[0].end = gIOKitPageableSpace.maps[0].address + kIOPageableMapSize;
gIOKitPageableSpace.hint = 0;
gIOKitPageableSpace.count = 1;
libInitialized = true;
}
static void ioThreadStart( void )
{
IOThreadFunc fcn;
void * arg;
fcn = threadArgFcn;
arg = threadArgArg;
lock_done( threadArgLock);
(*fcn)(arg);
IOExitThread();
}
IOThread IOCreateThread(IOThreadFunc fcn, void *arg)
{
IOThread thread;
lock_write( threadArgLock);
threadArgFcn = fcn;
threadArgArg = arg;
thread = kernel_thread( kernel_task, ioThreadStart);
return(thread);
}
volatile void IOExitThread()
{
(void) thread_terminate(current_act());
}
void * IOMalloc(vm_size_t size)
{
void * address;
address = (void *)kalloc(size);
#if IOALLOCDEBUG
if (address)
debug_iomalloc_size += size;
#endif
return address;
}
void IOFree(void * address, vm_size_t size)
{
if (address) {
kfree((vm_offset_t)address, size);
#if IOALLOCDEBUG
debug_iomalloc_size -= size;
#endif
}
}
void * IOMallocAligned(vm_size_t size, vm_size_t alignment)
{
kern_return_t kr;
vm_address_t address;
vm_address_t allocationAddress;
vm_size_t adjustedSize;
vm_offset_t alignMask;
if (size == 0)
return 0;
if (alignment == 0)
alignment = 1;
alignMask = alignment - 1;
adjustedSize = size + sizeof(vm_size_t) + sizeof(vm_address_t);
if (adjustedSize >= page_size) {
kr = kernel_memory_allocate(kernel_map, &address,
size, alignMask, KMA_KOBJECT);
if (KERN_SUCCESS != kr) {
IOLog("Failed %08x, %08x\n", size, alignment);
address = 0;
}
} else {
adjustedSize += alignMask;
allocationAddress = (vm_address_t) kalloc(adjustedSize);
if (allocationAddress) {
address = (allocationAddress + alignMask
+ (sizeof(vm_size_t) + sizeof(vm_address_t)))
& (~alignMask);
*((vm_size_t *)(address - sizeof(vm_size_t)
- sizeof(vm_address_t))) = adjustedSize;
*((vm_address_t *)(address - sizeof(vm_address_t)))
= allocationAddress;
} else
address = 0;
}
assert(0 == (address & alignMask));
#if IOALLOCDEBUG
if( address)
debug_iomalloc_size += size;
#endif
return (void *) address;
}
void IOFreeAligned(void * address, vm_size_t size)
{
vm_address_t allocationAddress;
vm_size_t adjustedSize;
if( !address)
return;
assert(size);
adjustedSize = size + sizeof(vm_size_t) + sizeof(vm_address_t);
if (adjustedSize >= page_size) {
kmem_free( kernel_map, (vm_address_t) address, size);
} else {
adjustedSize = *((vm_size_t *)( (vm_address_t) address
- sizeof(vm_address_t) - sizeof(vm_size_t)));
allocationAddress = *((vm_address_t *)( (vm_address_t) address
- sizeof(vm_address_t) ));
kfree((vm_offset_t) allocationAddress, adjustedSize);
}
#if IOALLOCDEBUG
debug_iomalloc_size -= size;
#endif
}
void * IOMallocContiguous(vm_size_t size, vm_size_t alignment,
IOPhysicalAddress * physicalAddress)
{
kern_return_t kr;
vm_address_t address;
vm_address_t allocationAddress;
vm_size_t adjustedSize;
vm_offset_t alignMask;
if (size == 0)
return 0;
if (alignment == 0)
alignment = 1;
alignMask = alignment - 1;
adjustedSize = (2 * size) + sizeof(vm_size_t) + sizeof(vm_address_t);
if (adjustedSize >= page_size) {
kr = kmem_alloc_contig(kernel_map, &address, size,
alignMask, KMA_KOBJECT);
if (KERN_SUCCESS != kr)
address = 0;
} else {
adjustedSize += alignMask;
allocationAddress = (vm_address_t)
kalloc(adjustedSize);
if (allocationAddress) {
address = (allocationAddress + alignMask
+ (sizeof(vm_size_t) + sizeof(vm_address_t)))
& (~alignMask);
if (atop(address) != atop(address + size - 1))
address = round_page(address);
*((vm_size_t *)(address - sizeof(vm_size_t)
- sizeof(vm_address_t))) = adjustedSize;
*((vm_address_t *)(address - sizeof(vm_address_t)))
= allocationAddress;
} else
address = 0;
}
if( address && physicalAddress)
*physicalAddress = (IOPhysicalAddress) pmap_extract( kernel_pmap,
address );
assert(0 == (address & alignMask));
#if IOALLOCDEBUG
if( address)
debug_iomalloc_size += size;
#endif
return (void *) address;
}
void IOFreeContiguous(void * address, vm_size_t size)
{
vm_address_t allocationAddress;
vm_size_t adjustedSize;
if( !address)
return;
assert(size);
adjustedSize = (2 * size) + sizeof(vm_size_t) + sizeof(vm_address_t);
if (adjustedSize >= page_size) {
kmem_free( kernel_map, (vm_address_t) address, size);
} else {
adjustedSize = *((vm_size_t *)( (vm_address_t) address
- sizeof(vm_address_t) - sizeof(vm_size_t)));
allocationAddress = *((vm_address_t *)( (vm_address_t) address
- sizeof(vm_address_t) ));
kfree((vm_offset_t) allocationAddress, adjustedSize);
}
#if IOALLOCDEBUG
debug_iomalloc_size -= size;
#endif
}
typedef kern_return_t (*IOIteratePageableMapsCallback)(vm_map_t map, void * ref);
kern_return_t IOIteratePageableMaps(vm_size_t size,
IOIteratePageableMapsCallback callback, void * ref)
{
kern_return_t kr = kIOReturnNotReady;
vm_size_t segSize;
UInt32 attempts;
UInt32 index;
vm_offset_t min;
vm_map_t map;
if (size > kIOPageableMaxMapSize)
return( kIOReturnBadArgument );
do {
index = gIOKitPageableSpace.hint;
attempts = gIOKitPageableSpace.count;
while( attempts--) {
kr = (*callback)(gIOKitPageableSpace.maps[index].map, ref);
if( KERN_SUCCESS == kr) {
gIOKitPageableSpace.hint = index;
break;
}
if( index)
index--;
else
index = gIOKitPageableSpace.count - 1;
}
if( KERN_SUCCESS == kr)
break;
mutex_lock( gIOKitPageableSpace.lock );
index = gIOKitPageableSpace.count;
if( index >= (kIOMaxPageableMaps - 1)) {
mutex_unlock( gIOKitPageableSpace.lock );
break;
}
if( size < kIOPageableMapSize)
segSize = kIOPageableMapSize;
else
segSize = size;
min = 0;
kr = kmem_suballoc(kernel_map,
&min,
segSize,
TRUE,
TRUE,
&map);
if( KERN_SUCCESS != kr) {
mutex_unlock( gIOKitPageableSpace.lock );
break;
}
gIOKitPageableSpace.maps[index].map = map;
gIOKitPageableSpace.maps[index].address = min;
gIOKitPageableSpace.maps[index].end = min + segSize;
gIOKitPageableSpace.hint = index;
gIOKitPageableSpace.count = index + 1;
mutex_unlock( gIOKitPageableSpace.lock );
} while( true );
return kr;
}
struct IOMallocPageableRef
{
vm_address_t address;
vm_size_t size;
};
static kern_return_t IOMallocPageableCallback(vm_map_t map, void * _ref)
{
struct IOMallocPageableRef * ref = (struct IOMallocPageableRef *) _ref;
kern_return_t kr;
kr = kmem_alloc_pageable( map, &ref->address, ref->size );
return( kr );
}
void * IOMallocPageable(vm_size_t size, vm_size_t alignment)
{
kern_return_t kr = kIOReturnNotReady;
struct IOMallocPageableRef ref;
if (alignment > page_size)
return( 0 );
if (size > kIOPageableMaxMapSize)
return( 0 );
ref.size = size;
kr = IOIteratePageableMaps( size, &IOMallocPageableCallback, &ref );
if( kIOReturnSuccess != kr)
ref.address = 0;
#if IOALLOCDEBUG
if( ref.address)
debug_iomalloc_size += round_page(size);
#endif
return( (void *) ref.address );
}
vm_map_t IOPageableMapForAddress( vm_address_t address )
{
vm_map_t map = 0;
UInt32 index;
for( index = 0; index < gIOKitPageableSpace.count; index++) {
if( (address >= gIOKitPageableSpace.maps[index].address)
&& (address < gIOKitPageableSpace.maps[index].end) ) {
map = gIOKitPageableSpace.maps[index].map;
break;
}
}
if( !map)
IOPanic("IOPageableMapForAddress: null");
return( map );
}
void IOFreePageable(void * address, vm_size_t size)
{
vm_map_t map;
map = IOPageableMapForAddress( (vm_address_t) address);
if( map)
kmem_free( map, (vm_offset_t) address, size);
#if IOALLOCDEBUG
debug_iomalloc_size -= round_page(size);
#endif
}
extern kern_return_t IOMapPages(vm_map_t map, vm_offset_t va, vm_offset_t pa,
vm_size_t length, unsigned int options);
IOReturn IOSetProcessorCacheMode( task_t task, IOVirtualAddress address,
IOByteCount length, IOOptionBits cacheMode )
{
IOReturn ret = kIOReturnSuccess;
vm_offset_t physAddr;
if( task != kernel_task)
return( kIOReturnUnsupported );
length = round_page(address + length) - trunc_page( address );
address = trunc_page( address );
cacheMode = (cacheMode << kIOMapCacheShift) & kIOMapCacheMask;
while( (kIOReturnSuccess == ret) && (length > 0) ) {
physAddr = pmap_extract( kernel_pmap, address );
if( physAddr)
ret = IOMapPages( get_task_map(task), address, physAddr, page_size, cacheMode );
else
ret = kIOReturnVMError;
length -= page_size;
}
return( ret );
}
IOReturn IOFlushProcessorCache( task_t task, IOVirtualAddress address,
IOByteCount length )
{
if( task != kernel_task)
return( kIOReturnUnsupported );
#if __ppc__
flush_dcache( (vm_offset_t) address, (unsigned) length, false );
#endif
return( kIOReturnSuccess );
}
SInt32 OSKernelStackRemaining( void )
{
SInt32 stack;
stack = (((SInt32) &stack) & (KERNEL_STACK_SIZE - 1));
return( stack );
}
void IOSleep(unsigned milliseconds)
{
int wait_result;
assert_wait_timeout(milliseconds, THREAD_INTERRUPTIBLE);
wait_result = thread_block((void (*)(void))0);
if (wait_result != THREAD_TIMED_OUT)
thread_cancel_timer();
}
void IODelay(unsigned microseconds)
{
extern void delay(int usec);
delay(microseconds);
}
void IOLog(const char *format, ...)
{
va_list ap;
extern void conslog_putc(char);
extern void logwakeup();
va_start(ap, format);
_doprnt(format, &ap, conslog_putc, 16);
va_end(ap);
}
void IOPanic(const char *reason)
{
panic(reason);
}
static char noValue[80];
const char *IOFindNameForValue(int value, const IONamedValue *regValueArray)
{
for( ; regValueArray->name; regValueArray++) {
if(regValueArray->value == value)
return(regValueArray->name);
}
sprintf(noValue, "0x%x (UNDEFINED)", value);
return((const char *)noValue);
}
IOReturn IOFindValueForName(const char *string,
const IONamedValue *regValueArray,
int *value)
{
for( ; regValueArray->name; regValueArray++) {
if(!strcmp(regValueArray->name, string)) {
*value = regValueArray->value;
return kIOReturnSuccess;
}
}
return kIOReturnBadArgument;
}
IOAlignment IOSizeToAlignment(unsigned int size)
{
register int shift;
const int intsize = sizeof(unsigned int) * 8;
for (shift = 1; shift < intsize; shift++) {
if (size & 0x80000000)
return (IOAlignment)(intsize - shift);
size <<= 1;
}
return 0;
}
unsigned int IOAlignmentToSize(IOAlignment align)
{
unsigned int size;
for (size = 1; align; align--) {
size <<= 1;
}
return size;
}
IOReturn IONDRVLibrariesInitialize( void )
{
return( kIOReturnUnsupported );
}