177 lines
5.1 KiB
C
177 lines
5.1 KiB
C
/*
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* include/asm-xtensa/coprocessor.h
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2003 - 2007 Tensilica Inc.
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*/
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#ifndef _XTENSA_COPROCESSOR_H
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#define _XTENSA_COPROCESSOR_H
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#include <linux/stringify.h>
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#include <asm/variant/tie.h>
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#include <asm/types.h>
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#ifdef __ASSEMBLY__
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# include <asm/variant/tie-asm.h>
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.macro xchal_sa_start a b
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.set .Lxchal_pofs_, 0
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.set .Lxchal_ofs_, 0
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.endm
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.macro xchal_sa_align ptr minofs maxofs ofsalign totalign
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.set .Lxchal_ofs_, .Lxchal_ofs_ + .Lxchal_pofs_ + \totalign - 1
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.set .Lxchal_ofs_, (.Lxchal_ofs_ & -\totalign) - .Lxchal_pofs_
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.endm
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#define _SELECT ( XTHAL_SAS_TIE | XTHAL_SAS_OPT \
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| XTHAL_SAS_CC \
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| XTHAL_SAS_CALR | XTHAL_SAS_CALE )
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.macro save_xtregs_opt ptr clb at1 at2 at3 at4 offset
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.if XTREGS_OPT_SIZE > 0
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addi \clb, \ptr, \offset
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xchal_ncp_store \clb \at1 \at2 \at3 \at4 select=_SELECT
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.endif
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.endm
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.macro load_xtregs_opt ptr clb at1 at2 at3 at4 offset
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.if XTREGS_OPT_SIZE > 0
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addi \clb, \ptr, \offset
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xchal_ncp_load \clb \at1 \at2 \at3 \at4 select=_SELECT
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.endif
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.endm
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#undef _SELECT
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#define _SELECT ( XTHAL_SAS_TIE | XTHAL_SAS_OPT \
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| XTHAL_SAS_NOCC \
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| XTHAL_SAS_CALR | XTHAL_SAS_CALE | XTHAL_SAS_GLOB )
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.macro save_xtregs_user ptr clb at1 at2 at3 at4 offset
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.if XTREGS_USER_SIZE > 0
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addi \clb, \ptr, \offset
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xchal_ncp_store \clb \at1 \at2 \at3 \at4 select=_SELECT
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.endif
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.endm
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.macro load_xtregs_user ptr clb at1 at2 at3 at4 offset
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.if XTREGS_USER_SIZE > 0
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addi \clb, \ptr, \offset
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xchal_ncp_load \clb \at1 \at2 \at3 \at4 select=_SELECT
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.endif
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.endm
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#undef _SELECT
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#endif /* __ASSEMBLY__ */
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/*
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* XTENSA_HAVE_COPROCESSOR(x) returns 1 if coprocessor x is configured.
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*
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* XTENSA_HAVE_IO_PORT(x) returns 1 if io-port x is configured.
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*
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*/
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#define XTENSA_HAVE_COPROCESSOR(x) \
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((XCHAL_CP_MASK ^ XCHAL_CP_PORT_MASK) & (1 << (x)))
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#define XTENSA_HAVE_COPROCESSORS \
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(XCHAL_CP_MASK ^ XCHAL_CP_PORT_MASK)
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#define XTENSA_HAVE_IO_PORT(x) \
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(XCHAL_CP_PORT_MASK & (1 << (x)))
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#define XTENSA_HAVE_IO_PORTS \
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XCHAL_CP_PORT_MASK
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#ifndef __ASSEMBLY__
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#if XCHAL_HAVE_CP
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#define RSR_CPENABLE(x) do { \
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__asm__ __volatile__("rsr %0," __stringify(CPENABLE) : "=a" (x)); \
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} while(0);
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#define WSR_CPENABLE(x) do { \
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__asm__ __volatile__("wsr %0," __stringify(CPENABLE) "; rsync" \
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:: "a" (x)); \
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} while(0);
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#endif /* XCHAL_HAVE_CP */
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/*
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* Additional registers.
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* We define three types of additional registers:
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* ext: extra registers that are used by the compiler
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* cpn: optional registers that can be used by a user application
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* cpX: coprocessor registers that can only be used if the corresponding
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* CPENABLE bit is set.
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*/
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#define XCHAL_SA_REG(list,cc,abi,type,y,name,z,align,size,...) \
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__REG ## list (cc, abi, type, name, size, align)
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#define __REG0(cc,abi,t,name,s,a) __REG0_ ## cc (abi,name)
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#define __REG1(cc,abi,t,name,s,a) __REG1_ ## cc (name)
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#define __REG2(cc,abi,type,...) __REG2_ ## type (__VA_ARGS__)
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#define __REG0_0(abi,name)
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#define __REG0_1(abi,name) __REG0_1 ## abi (name)
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#define __REG0_10(name) __u32 name;
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#define __REG0_11(name) __u32 name;
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#define __REG0_12(name)
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#define __REG1_0(name) __u32 name;
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#define __REG1_1(name)
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#define __REG2_0(n,s,a) __u32 name;
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#define __REG2_1(n,s,a) unsigned char n[s] __attribute__ ((aligned(a)));
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#define __REG2_2(n,s,a) unsigned char n[s] __attribute__ ((aligned(a)));
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typedef struct { XCHAL_NCP_SA_LIST(0) } xtregs_opt_t
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__attribute__ ((aligned (XCHAL_NCP_SA_ALIGN)));
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typedef struct { XCHAL_NCP_SA_LIST(1) } xtregs_user_t
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__attribute__ ((aligned (XCHAL_NCP_SA_ALIGN)));
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#if XTENSA_HAVE_COPROCESSORS
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typedef struct { XCHAL_CP0_SA_LIST(2) } xtregs_cp0_t
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__attribute__ ((aligned (XCHAL_CP0_SA_ALIGN)));
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typedef struct { XCHAL_CP1_SA_LIST(2) } xtregs_cp1_t
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__attribute__ ((aligned (XCHAL_CP1_SA_ALIGN)));
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typedef struct { XCHAL_CP2_SA_LIST(2) } xtregs_cp2_t
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__attribute__ ((aligned (XCHAL_CP2_SA_ALIGN)));
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typedef struct { XCHAL_CP3_SA_LIST(2) } xtregs_cp3_t
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__attribute__ ((aligned (XCHAL_CP3_SA_ALIGN)));
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typedef struct { XCHAL_CP4_SA_LIST(2) } xtregs_cp4_t
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__attribute__ ((aligned (XCHAL_CP4_SA_ALIGN)));
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typedef struct { XCHAL_CP5_SA_LIST(2) } xtregs_cp5_t
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__attribute__ ((aligned (XCHAL_CP5_SA_ALIGN)));
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typedef struct { XCHAL_CP6_SA_LIST(2) } xtregs_cp6_t
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__attribute__ ((aligned (XCHAL_CP6_SA_ALIGN)));
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typedef struct { XCHAL_CP7_SA_LIST(2) } xtregs_cp7_t
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__attribute__ ((aligned (XCHAL_CP7_SA_ALIGN)));
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extern struct thread_info* coprocessor_owner[XCHAL_CP_MAX];
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extern void coprocessor_save(void*, int);
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extern void coprocessor_load(void*, int);
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extern void coprocessor_flush(struct thread_info*, int);
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extern void coprocessor_restore(struct thread_info*, int);
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extern void coprocessor_release_all(struct thread_info*);
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extern void coprocessor_flush_all(struct thread_info*);
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static inline void coprocessor_clear_cpenable(void)
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{
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unsigned long i = 0;
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WSR_CPENABLE(i);
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}
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#endif /* XTENSA_HAVE_COPROCESSORS */
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#endif /* !__ASSEMBLY__ */
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#endif /* _XTENSA_COPROCESSOR_H */
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