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