cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ehci-dbgp.h (2099B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Standalone EHCI usb debug driver
      4 *
      5 * Originally written by:
      6 *  Eric W. Biederman" <ebiederm@xmission.com> and
      7 *  Yinghai Lu <yhlu.kernel@gmail.com>
      8 *
      9 * Changes for early/late printk and HW errata:
     10 *  Jason Wessel <jason.wessel@windriver.com>
     11 *  Copyright (C) 2009 Wind River Systems, Inc.
     12 *
     13 */
     14
     15#ifndef __LINUX_USB_EHCI_DBGP_H
     16#define __LINUX_USB_EHCI_DBGP_H
     17
     18#include <linux/console.h>
     19#include <linux/types.h>
     20
     21/* Appendix C, Debug port ... intended for use with special "debug devices"
     22 * that can help if there's no serial console.  (nonstandard enumeration.)
     23 */
     24struct ehci_dbg_port {
     25	u32	control;
     26#define DBGP_OWNER	(1<<30)
     27#define DBGP_ENABLED	(1<<28)
     28#define DBGP_DONE	(1<<16)
     29#define DBGP_INUSE	(1<<10)
     30#define DBGP_ERRCODE(x)	(((x)>>7)&0x07)
     31#	define DBGP_ERR_BAD	1
     32#	define DBGP_ERR_SIGNAL	2
     33#define DBGP_ERROR	(1<<6)
     34#define DBGP_GO		(1<<5)
     35#define DBGP_OUT	(1<<4)
     36#define DBGP_LEN(x)	(((x)>>0)&0x0f)
     37	u32	pids;
     38#define DBGP_PID_GET(x)		(((x)>>16)&0xff)
     39#define DBGP_PID_SET(data, tok)	(((data)<<8)|(tok))
     40	u32	data03;
     41	u32	data47;
     42	u32	address;
     43#define DBGP_EPADDR(dev, ep)	(((dev)<<8)|(ep))
     44};
     45
     46#ifdef CONFIG_EARLY_PRINTK_DBGP
     47extern int early_dbgp_init(char *s);
     48extern struct console early_dbgp_console;
     49#endif /* CONFIG_EARLY_PRINTK_DBGP */
     50
     51struct usb_hcd;
     52
     53#ifdef CONFIG_XEN_DOM0
     54extern int xen_dbgp_reset_prep(struct usb_hcd *);
     55extern int xen_dbgp_external_startup(struct usb_hcd *);
     56#else
     57static inline int xen_dbgp_reset_prep(struct usb_hcd *hcd)
     58{
     59	return 1; /* Shouldn't this be 0? */
     60}
     61
     62static inline int xen_dbgp_external_startup(struct usb_hcd *hcd)
     63{
     64	return -1;
     65}
     66#endif
     67
     68#ifdef CONFIG_EARLY_PRINTK_DBGP
     69/* Call backs from ehci host driver to ehci debug driver */
     70extern int dbgp_external_startup(struct usb_hcd *);
     71extern int dbgp_reset_prep(struct usb_hcd *);
     72#else
     73static inline int dbgp_reset_prep(struct usb_hcd *hcd)
     74{
     75	return xen_dbgp_reset_prep(hcd);
     76}
     77
     78static inline int dbgp_external_startup(struct usb_hcd *hcd)
     79{
     80	return xen_dbgp_external_startup(hcd);
     81}
     82#endif
     83
     84#endif /* __LINUX_USB_EHCI_DBGP_H */