LXR linux/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 */
  24struct pti_masterchannel {
  25        u8 master;
  26        u8 channel;
  27};
  28
  29/* the following functions are defined in misc/pti.c */
  30void pti_writedata(struct pti_masterchannel *mc, u8 *buf, int count);
  31struct pti_masterchannel *pti_request_masterchannel(u8 type,
  32                                                    const char *thread_name);
  33void pti_release_masterchannel(struct pti_masterchannel *mc);
  34
  35#endif /* LINUX_INTEL_PTI_H_ */
  36