/*
* include/asm-xtensa/coprocessor.h
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2003 - 2007 Tensilica Inc.
*/


#ifndef _XTENSA_COPROCESSOR_H
#define _XTENSA_COPROCESSOR_H

#include <linux/stringify.h>
#include <variant/core.h>
#include <variant/tie.h>
#include <asm/types.h>

#ifdef __ASSEMBLY__
# include <variant/tie-asm.h>

.macro xchal_sa_start a b
.set .Lxchal_pofs_, 0
.set .Lxchal_ofs_, 0
.endm

.macro xchal_sa_align ptr minofs maxofs ofsalign totalign
.set .Lxchal_ofs_, .Lxchal_ofs_ + .Lxchal_pofs_ + \totalign - 1
.set .Lxchal_ofs_, (.Lxchal_ofs_ & -\totalign) - .Lxchal_pofs_
.endm

#define _SELECT ( XTHAL_SAS_TIE | XTHAL_SAS_OPT \
| XTHAL_SAS_CC \
| XTHAL_SAS_CALR | XTHAL_SAS_CALE )

.macro save_xtregs_opt ptr clb at1 at2 at3 at4 offset
.if XTREGS_OPT_SIZE > 0
addi \clb, \ptr, \offset
xchal_ncp_store \clb \at1 \at2 \at3 \at4 select=_SELECT
.endif
.endm

.macro load_xtregs_opt ptr clb at1 at2 at3 at4 offset
.if XTREGS_OPT_SIZE > 0
addi \clb, \ptr, \offset
xchal_ncp_load \clb \at1 \at2 \at3 \at4 select=_SELECT
.endif
.endm
#undef _SELECT

#define _SELECT ( XTHAL_SAS_TIE | XTHAL_SAS_OPT \
| XTHAL_SAS_NOCC \
| XTHAL_SAS_CALR | XTHAL_SAS_CALE | XTHAL_SAS_GLOB )

.macro save_xtregs_user ptr clb at1 at2 at3 at4 offset
.if XTREGS_USER_SIZE > 0
addi \clb, \ptr, \offset
xchal_ncp_store \clb \at1 \at2 \at3 \at4 select=_SELECT
.endif
.endm

.macro load_xtregs_user ptr clb at1 at2 at3 at4 offset
.if XTREGS_USER_SIZE > 0
addi \clb, \ptr, \offset
xchal_ncp_load \clb \at1 \at2 \at3 \at4 select=_SELECT
.endif
.endm
#undef _SELECT



#endif /* __ASSEMBLY__ */

/*
* XTENSA_HAVE_COPROCESSOR(x) returns 1 if coprocessor x is configured.
*
* XTENSA_HAVE_IO_PORT(x) returns 1 if io-port x is configured.
*
*/

#define XTENSA_HAVE_COPROCESSOR(x) \
((XCHAL_CP_MASK ^ XCHAL_CP_PORT_MASK) & (1 << (x)))
#define XTENSA_HAVE_COPROCESSORS \
(XCHAL_CP_MASK ^ XCHAL_CP_PORT_MASK)
#define XTENSA_HAVE_IO_PORT(x) \
(XCHAL_CP_PORT_MASK & (1 << (x)))
#define XTENSA_HAVE_IO_PORTS \
XCHAL_CP_PORT_MASK

#ifndef __ASSEMBLY__


#if XCHAL_HAVE_CP

#define RSR_CPENABLE(x) do { \
__asm__ __volatile__("rsr %0, cpenable" : "=a" (x)); \
} while(0);
#define WSR_CPENABLE(x) do { \
__asm__ __volatile__("wsr %0, cpenable; rsync" :: "a" (x)); \
} while(0);

#endif /* XCHAL_HAVE_CP */


/*
* Additional registers.
* We define three types of additional registers:
* ext: extra registers that are used by the compiler
* cpn: optional registers that can be used by a user application
* cpX: coprocessor registers that can only be used if the corresponding
* CPENABLE bit is set.
*/

#define XCHAL_SA_REG(list,cc,abi,type,y,name,z,align,size,...) \
__REG ## list (cc, abi, type, name, size, align)

#define __REG0(cc,abi,t,name,s,a) __REG0_ ## cc (abi,name)
#define __REG1(cc,abi,t,name,s,a) __REG1_ ## cc (name)
#define __REG2(cc,abi,type,...) __REG2_ ## type (__VA_ARGS__)

#define __REG0_0(abi,name)
#define __REG0_1(abi,name) __REG0_1 ## abi (name)
#define __REG0_10(name) __u32 name;
#define __REG0_11(name) __u32 name;
#define __REG0_12(name)

#define __REG1_0(name) __u32 name;
#define __REG1_1(name)

#define __REG2_0(n,s,a) __u32 name;
#define __REG2_1(n,s,a) unsigned char n[s] __attribute__ ((aligned(a)));
#define __REG2_2(n,s,a) unsigned char n[s] __attribute__ ((aligned(a)));

typedef struct { XCHAL_NCP_SA_LIST(0) } xtregs_opt_t
__attribute__ ((aligned (XCHAL_NCP_SA_ALIGN)));
typedef struct { XCHAL_NCP_SA_LIST(1) } xtregs_user_t
__attribute__ ((aligned (XCHAL_NCP_SA_ALIGN)));

#if XTENSA_HAVE_COPROCESSORS

typedef struct { XCHAL_CP0_SA_LIST(2) } xtregs_cp0_t
__attribute__ ((aligned (XCHAL_CP0_SA_ALIGN)));
typedef struct { XCHAL_CP1_SA_LIST(2) } xtregs_cp1_t
__attribute__ ((aligned (XCHAL_CP1_SA_ALIGN)));
typedef struct { XCHAL_CP2_SA_LIST(2) } xtregs_cp2_t
__attribute__ ((aligned (XCHAL_CP2_SA_ALIGN)));
typedef struct { XCHAL_CP3_SA_LIST(2) } xtregs_cp3_t
__attribute__ ((aligned (XCHAL_CP3_SA_ALIGN)));
typedef struct { XCHAL_CP4_SA_LIST(2) } xtregs_cp4_t
__attribute__ ((aligned (XCHAL_CP4_SA_ALIGN)));
typedef struct { XCHAL_CP5_SA_LIST(2) } xtregs_cp5_t
__attribute__ ((aligned (XCHAL_CP5_SA_ALIGN)));
typedef struct { XCHAL_CP6_SA_LIST(2) } xtregs_cp6_t
__attribute__ ((aligned (XCHAL_CP6_SA_ALIGN)));
typedef struct { XCHAL_CP7_SA_LIST(2) } xtregs_cp7_t
__attribute__ ((aligned (XCHAL_CP7_SA_ALIGN)));

extern struct thread_info* coprocessor_owner[XCHAL_CP_MAX];
extern void coprocessor_save(void*, int);
extern void coprocessor_load(void*, int);
extern void coprocessor_flush(struct thread_info*, int);
extern void coprocessor_restore(struct thread_info*, int);

extern void coprocessor_release_all(struct thread_info*);
extern void coprocessor_flush_all(struct thread_info*);

static inline void coprocessor_clear_cpenable(void)
{
unsigned long i = 0;
WSR_CPENABLE(i);
}

#endif /* XTENSA_HAVE_COPROCESSORS */

#endif /* !__ASSEMBLY__ */
#endif /* _XTENSA_COPROCESSOR_H */