icswx.h
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#ifndef _ARCH_POWERPC_MM_ICSWX_H_
#define _ARCH_POWERPC_MM_ICSWX_H_
/*
* ICSWX and ACOP Management
*
* Copyright (C) 2011 Anton Blanchard, IBM Corp. <anton@samba.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#include <asm/mmu_context.h>
/* also used to denote that PIDs are not used */
#define COP_PID_NONE 0
static inline void sync_cop(void *arg)
{
struct mm_struct *mm = arg;
if (mm == current->active_mm)
switch_cop(current->active_mm);
}
#ifdef CONFIG_PPC_ICSWX_PID
extern int get_cop_pid(struct mm_struct *mm);
extern int disable_cop_pid(struct mm_struct *mm);
extern void free_cop_pid(int free_pid);
#else
#define get_cop_pid(m) (COP_PID_NONE)
#define disable_cop_pid(m) (COP_PID_NONE)
#define free_cop_pid(p)
#endif
/*
* These are implementation bits for architected registers. If this
* ever becomes architecture the should be moved to reg.h et. al.
*/
/* UCT is the same bit for Server and Embedded */
#define ICSWX_DSI_UCT 0x00004000 /* Unavailable Coprocessor Type */
#ifdef CONFIG_PPC_BOOK3E
/* Embedded implementation gives us no hints as to what the CT is */
#define ICSWX_GET_CT_HINT(x) (-1)
#else
/* Server implementation contains the CT value in the DSISR */
#define ICSWX_DSISR_CTMASK 0x00003f00
#define ICSWX_GET_CT_HINT(x) (((x) & ICSWX_DSISR_CTMASK) >> 8)
#endif
#define ICSWX_RC_STARTED 0x8 /* The request has been started */
#define ICSWX_RC_NOT_IDLE 0x4 /* No coprocessor found idle */
#define ICSWX_RC_NOT_FOUND 0x2 /* No coprocessor found */
#define ICSWX_RC_UNDEFINED 0x1 /* Reserved */
extern int acop_handle_fault(struct pt_regs *regs, unsigned long address,
unsigned long error_code);
#endif /* !_ARCH_POWERPC_MM_ICSWX_H_ */