1#ifndef _ARCH_POWERPC_MM_ICSWX_H_
2#define _ARCH_POWERPC_MM_ICSWX_H_
3
4/*
5 *  ICSWX and ACOP Management
6 *
7 *  Copyright (C) 2011 Anton Blanchard, IBM Corp. <anton@samba.org>
8 *
9 *  This program is free software; you can redistribute it and/or
10 *  modify it under the terms of the GNU General Public License
11 *  as published by the Free Software Foundation; either version
12 *  2 of the License, or (at your option) any later version.
13 *
14 */
15
16#include <asm/mmu_context.h>
17
18/* also used to denote that PIDs are not used */
19#define COP_PID_NONE 0
20
21static inline void sync_cop(void *arg)
22{
23	struct mm_struct *mm = arg;
24
25	if (mm == current->active_mm)
26		switch_cop(current->active_mm);
27}
28
29#ifdef CONFIG_PPC_ICSWX_PID
30extern int get_cop_pid(struct mm_struct *mm);
31extern int disable_cop_pid(struct mm_struct *mm);
32extern void free_cop_pid(int free_pid);
33#else
34#define get_cop_pid(m) (COP_PID_NONE)
35#define disable_cop_pid(m) (COP_PID_NONE)
36#define free_cop_pid(p)
37#endif
38
39/*
40 * These are implementation bits for architected registers.  If this
41 * ever becomes architecture the should be moved to reg.h et. al.
42 */
43/* UCT is the same bit for Server and Embedded */
44#define ICSWX_DSI_UCT		0x00004000  /* Unavailable Coprocessor Type */
45
46#ifdef CONFIG_PPC_BOOK3E
47/* Embedded implementation gives us no hints as to what the CT is */
48#define ICSWX_GET_CT_HINT(x) (-1)
49#else
50/* Server implementation contains the CT value in the DSISR */
51#define ICSWX_DSISR_CTMASK	0x00003f00
52#define ICSWX_GET_CT_HINT(x)	(((x) & ICSWX_DSISR_CTMASK) >> 8)
53#endif
54
55#define ICSWX_RC_STARTED	0x8	/* The request has been started */
56#define ICSWX_RC_NOT_IDLE	0x4	/* No coprocessor found idle */
57#define ICSWX_RC_NOT_FOUND	0x2	/* No coprocessor found */
58#define ICSWX_RC_UNDEFINED	0x1	/* Reserved */
59
60extern int acop_handle_fault(struct pt_regs *regs, unsigned long address,
61			     unsigned long error_code);
62
63static inline u64 acop_copro_type_bit(unsigned int type)
64{
65	return 1ULL << (63 - type);
66}
67
68#endif /* !_ARCH_POWERPC_MM_ICSWX_H_ */
69