include/linux/intel-pti.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  Copyright (C) Intel 2011
   4  *
   5  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   6  *
   7  * The PTI (Parallel Trace Interface) driver directs trace data routed from
   8  * various parts in the system out through the Intel Penwell PTI port and
   9  * out of the mobile device for analysis with a debugging tool
  10  * (Lauterbach, Fido). This is part of a solution for the MIPI P1149.7,
  11  * compact JTAG, standard.
  12  *
  13  * This header file will allow other parts of the OS to use the
  14  * interface to write out it's contents for debugging a mobile system.
  15  */
  16
  17 #ifndef LINUX_INTEL_PTI_H_
  18 #define LINUX_INTEL_PTI_H_
  19
  20 /* offset for last dword of any PTI message. Part of MIPI P1149.7 */
  21 #define PTI_LASTDWORD_DTS       0x30
  22
  23 /* basic structure used as a write address to the PTI HW */
  24 struct pti_masterchannel {
  25         u8 master;
  26         u8 channel;
  27 };
  28
  29 /* the following functions are defined in misc/pti.c */
  30 void pti_writedata(struct pti_masterchannel *mc, u8 *buf, int count);
  31 struct pti_masterchannel *pti_request_masterchannel(u8 type,
  32                                                     const char *thread_name);
  33 void pti_release_masterchannel(struct pti_masterchannel *mc);
  34
  35 #endif /* LINUX_INTEL_PTI_H_ */