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   1 /*
   2  * include/asm-xtensa/coprocessor.h
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 2003 - 2007 Tensilica Inc.
   9  */
  10
  11
  12 #ifndef _XTENSA_COPROCESSOR_H
  13 #define _XTENSA_COPROCESSOR_H
  14
  15 #include <linux/stringify.h>
  16 #include <variant/tie.h>
  17 #include <asm/types.h>
  18
  19 #ifdef __ASSEMBLY__
  20 # include <variant/tie-asm.h>
  21
  22 .macro  xchal_sa_start  a b
  23         .set .Lxchal_pofs_, 0
  24         .set .Lxchal_ofs_, 0
  25 .endm
  26
  27 .macro  xchal_sa_align  ptr minofs maxofs ofsalign totalign
  28         .set    .Lxchal_ofs_, .Lxchal_ofs_ + .Lxchal_pofs_ + \totalign - 1
  29         .set    .Lxchal_ofs_, (.Lxchal_ofs_ & -\totalign) - .Lxchal_pofs_
  30 .endm
  31
  32 #define _SELECT (  XTHAL_SAS_TIE | XTHAL_SAS_OPT \
  33                  | XTHAL_SAS_CC \
  34                  | XTHAL_SAS_CALR | XTHAL_SAS_CALE )
  35
  36 .macro save_xtregs_opt ptr clb at1 at2 at3 at4 offset
  37         .if XTREGS_OPT_SIZE > 0
  38                 addi    \clb, \ptr, \offset
  39                 xchal_ncp_store \clb \at1 \at2 \at3 \at4 select=_SELECT
  40         .endif
  41 .endm
  42
  43 .macro load_xtregs_opt ptr clb at1 at2 at3 at4 offset
  44         .if XTREGS_OPT_SIZE > 0
  45                 addi    \clb, \ptr, \offset
  46                 xchal_ncp_load \clb \at1 \at2 \at3 \at4 select=_SELECT
  47         .endif
  48 .endm
  49 #undef _SELECT
  50
  51 #define _SELECT (  XTHAL_SAS_TIE | XTHAL_SAS_OPT \
  52                  | XTHAL_SAS_NOCC \
  53                  | XTHAL_SAS_CALR | XTHAL_SAS_CALE | XTHAL_SAS_GLOB )
  54
  55 .macro save_xtregs_user ptr clb at1 at2 at3 at4 offset
  56         .if XTREGS_USER_SIZE > 0
  57                 addi    \clb, \ptr, \offset
  58                 xchal_ncp_store \clb \at1 \at2 \at3 \at4 select=_SELECT
  59         .endif
  60 .endm
  61
  62 .macro load_xtregs_user ptr clb at1 at2 at3 at4 offset
  63         .if XTREGS_USER_SIZE > 0
  64                 addi    \clb, \ptr, \offset
  65                 xchal_ncp_load \clb \at1 \at2 \at3 \at4 select=_SELECT
  66         .endif
  67 .endm
  68 #undef _SELECT
  69
  70
  71
  72 #endif  /* __ASSEMBLY__ */
  73
  74 /*
  75  * XTENSA_HAVE_COPROCESSOR(x) returns 1 if coprocessor x is configured.
  76  *
  77  * XTENSA_HAVE_IO_PORT(x) returns 1 if io-port x is configured.
  78  *
  79  */
  80
  81 #define XTENSA_HAVE_COPROCESSOR(x)                                      \
  82         ((XCHAL_CP_MASK ^ XCHAL_CP_PORT_MASK) & (1 << (x)))
  83 #define XTENSA_HAVE_COPROCESSORS                                        \
  84         (XCHAL_CP_MASK ^ XCHAL_CP_PORT_MASK)
  85 #define XTENSA_HAVE_IO_PORT(x)                                          \
  86         (XCHAL_CP_PORT_MASK & (1 << (x)))
  87 #define XTENSA_HAVE_IO_PORTS                                            \
  88         XCHAL_CP_PORT_MASK
  89
  90 #ifndef __ASSEMBLY__
  91
  92
  93 #if XCHAL_HAVE_CP
  94
  95 #define RSR_CPENABLE(x) do {                                              \
  96         __asm__ __volatile__("rsr %0," __stringify(CPENABLE) : "=a" (x)); \
  97         } while(0);
  98 #define WSR_CPENABLE(x) do {                                              \
  99         __asm__ __volatile__("wsr %0," __stringify(CPENABLE) "; rsync"    \
 100                              :: "a" (x));                                 \
 101         } while(0);
 102
 103 #endif /* XCHAL_HAVE_CP */
 104
 105
 106 /*
 107  * Additional registers.
 108  * We define three types of additional registers:
 109  *  ext: extra registers that are used by the compiler
 110  *  cpn: optional registers that can be used by a user application
 111  *  cpX: coprocessor registers that can only be used if the corresponding
 112  *       CPENABLE bit is set.
 113  */
 114
 115 #define XCHAL_SA_REG(list,cc,abi,type,y,name,z,align,size,...)  \
 116         __REG ## list (cc, abi, type, name, size, align)
 117
 118 #define __REG0(cc,abi,t,name,s,a)       __REG0_ ## cc (abi,name)
 119 #define __REG1(cc,abi,t,name,s,a)       __REG1_ ## cc (name)
 120 #define __REG2(cc,abi,type,...)         __REG2_ ## type (__VA_ARGS__)
 121
 122 #define __REG0_0(abi,name)
 123 #define __REG0_1(abi,name)              __REG0_1 ## abi (name)
 124 #define __REG0_10(name) __u32 name;
 125 #define __REG0_11(name) __u32 name;
 126 #define __REG0_12(name)
 127
 128 #define __REG1_0(name)  __u32 name;
 129 #define __REG1_1(name)
 130
 131 #define __REG2_0(n,s,a) __u32 name;
 132 #define __REG2_1(n,s,a) unsigned char n[s] __attribute__ ((aligned(a)));
 133 #define __REG2_2(n,s,a) unsigned char n[s] __attribute__ ((aligned(a)));
 134
 135 typedef struct { XCHAL_NCP_SA_LIST(0) } xtregs_opt_t
 136         __attribute__ ((aligned (XCHAL_NCP_SA_ALIGN)));
 137 typedef struct { XCHAL_NCP_SA_LIST(1) } xtregs_user_t
 138         __attribute__ ((aligned (XCHAL_NCP_SA_ALIGN)));
 139
 140 #if XTENSA_HAVE_COPROCESSORS
 141
 142 typedef struct { XCHAL_CP0_SA_LIST(2) } xtregs_cp0_t
 143         __attribute__ ((aligned (XCHAL_CP0_SA_ALIGN)));
 144 typedef struct { XCHAL_CP1_SA_LIST(2) } xtregs_cp1_t
 145         __attribute__ ((aligned (XCHAL_CP1_SA_ALIGN)));
 146 typedef struct { XCHAL_CP2_SA_LIST(2) } xtregs_cp2_t
 147         __attribute__ ((aligned (XCHAL_CP2_SA_ALIGN)));
 148 typedef struct { XCHAL_CP3_SA_LIST(2) } xtregs_cp3_t
 149         __attribute__ ((aligned (XCHAL_CP3_SA_ALIGN)));
 150 typedef struct { XCHAL_CP4_SA_LIST(2) } xtregs_cp4_t
 151         __attribute__ ((aligned (XCHAL_CP4_SA_ALIGN)));
 152 typedef struct { XCHAL_CP5_SA_LIST(2) } xtregs_cp5_t
 153         __attribute__ ((aligned (XCHAL_CP5_SA_ALIGN)));
 154 typedef struct { XCHAL_CP6_SA_LIST(2) } xtregs_cp6_t
 155         __attribute__ ((aligned (XCHAL_CP6_SA_ALIGN)));
 156 typedef struct { XCHAL_CP7_SA_LIST(2) } xtregs_cp7_t
 157         __attribute__ ((aligned (XCHAL_CP7_SA_ALIGN)));
 158
 159 extern struct thread_info* coprocessor_owner[XCHAL_CP_MAX];
 160 extern void coprocessor_save(void*, int);
 161 extern void coprocessor_load(void*, int);
 162 extern void coprocessor_flush(struct thread_info*, int);
 163 extern void coprocessor_restore(struct thread_info*, int);
 164
 165 extern void coprocessor_release_all(struct thread_info*);
 166 extern void coprocessor_flush_all(struct thread_info*);
 167
 168 static inline void coprocessor_clear_cpenable(void)
 169 {
 170         unsigned long i = 0;
 171         WSR_CPENABLE(i);
 172 }
 173
 174 #endif  /* XTENSA_HAVE_COPROCESSORS */
 175
 176 #endif  /* !__ASSEMBLY__ */
 177 #endif  /* _XTENSA_COPROCESSOR_H */