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/* Copyright (c) 1991 NeXT Computer, Inc. All rights reserved.
*
* kernelDriver.h - kernel-only driverkit functions.
*
* HISTORY
* 12-Jul-91 Doug Mitchell at NeXT
* Created.
*/
#ifdef KERNEL
#import <objc/objc.h>
#import <driverkit/driverTypes.h>
#import <mach/mach_types.h>
#import <sys/buf.h>
/*
* The functions defined here are not RPC's; they are functions available
* only to drivers in the kernel.
*/
/*
* Get id of specified IODeviceName. Returns IO_R_NOTATTACHED if
* deviceName not found, else returns IO_R_SUCCESS.
*/
IOReturn IOGetObjectForDeviceName(
IOString deviceName,
id *deviceId); /* returned*/
/*
* Returns the kernel's vm_task_t.
*/
vm_task_t IOVmTaskSelf();
/*
* Returns the current task's vm_task_t.
*/
vm_task_t IOVmTaskCurrent();
/*
* Returns vm_task_t associated with a struct buf.
*/
vm_task_t IOVmTaskForBuf(struct buf *buffer);
/*
* Set the current thread's UNIX errno.
*/
void IOSetUNIXError(int errno);
/*
* Convert between a port in a loadable kernel server's IPC space, an
* I/O task port, and a kernel internal port.
*/
typedef enum {
IO_Kernel, /* a kernel internal port*/
IO_KernelIOTask, /* a port in the kernel I/O task*/
IO_CurrentTask /* a port in a loadable kernel server*/
} IOIPCSpace;
/*
* Returns PORT_NULL on error.
*/
port_t IOConvertPort(port_t inPort, /* to be converted*/
IOIPCSpace from, /* IPC space of inPort*/
IOIPCSpace to); /* IPC space of returned port*/
/*
* Obtain the IOTask version of host_priv_self() (the privileged host port).
*/
port_t IOHostPrivSelf();
/*
* Find a physical address (if any) for the specified virtual address.
* Returns IO_R_INVALID_ARG if no virtual-to-physical mapping exists,
* else returns IO_R_SUCCESS.
* For IOTask virtual addresses, use IOVmTaskSelf() for the 'task'
* argument.
* This function may block on some architectures.
*/
IOReturn IOPhysicalFromVirtual(vm_task_t task,
vm_address_t virtualAddress,
unsigned *physicalAddress);
/*
* Create a mapping in the IOTask address map
* for the specified physical region. Assumes
* that the physical memory is already wired.
*/
IOReturn
IOMapPhysicalIntoIOTask(
unsigned physicalAddress,
unsigned length,
vm_address_t *virtualAddress);
/*
* Destroy a mapping created by
* IOTaskCreateVirtualFromPhysical()
*/
IOReturn
IOUnmapPhysicalFromIOTask(
vm_address_t virtualAddress,
unsigned length);
#endif
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.