/* xtruntime-frames.h - exception stack frames for single-threaded run-time */ /* $Id: //depot/rel/Foxhill/dot.9/Xtensa/OS/include/xtensa/xtruntime-frames.h#1 $ */ /* * Copyright (c) 2002-2012 Tensilica Inc. * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #ifndef _XTRUNTIME_FRAMES_H_ #define _XTRUNTIME_FRAMES_H_ #include /* Macros that help define structures for both C and assembler: */ #if defined(_ASMLANGUAGE) || defined(__ASSEMBLER__) #ifdef __clang__ #define STRUCT_BEGIN .set XT_STRUCT_OFFSET, 0 #define STRUCT_FIELD(ctype,size,pre,name) .set pre##name, XT_STRUCT_OFFSET; .set XT_STRUCT_OFFSET, pre##name + size #define STRUCT_AFIELD(ctype,size,pre,name,n) .set pre##name, XT_STRUCT_OFFSET;\ .set XT_STRUCT_OFFSET, pre##name + (size)*(n); #define STRUCT_AFIELD_A(ctype,size,align,pre,name,n) .set pre##name, XT_STRUCT_OFFSET\ .ifgt (align-1); .set pre##name, XT_STRUCT_OFFSET + (align - (XT_STRUCT_OFFSET & (align-1))); .endif\ .set XT_STRUCT_OFFSET, pre##name + (size)*(n); #define STRUCT_END(sname) .set sname##Size, XT_STRUCT_OFFSET; #else /* __clang__ */ #define STRUCT_BEGIN .pushsection .text; .struct 0 #define STRUCT_FIELD(ctype,size,pre,name) pre##name: .space size #define STRUCT_AFIELD(ctype,size,pre,name,n) pre##name: .if n ; .space (size)*(n) ; .endif #define STRUCT_AFIELD_A(ctype,size,align,pre,name,n) .balign align ; pre##name: .if n ; .space (size)*(n) ; .endif #define STRUCT_END(sname) sname##Size:; .popsection #endif /* __clang__ */ #else /*_ASMLANGUAGE||__ASSEMBLER__*/ #define STRUCT_BEGIN typedef struct { #define STRUCT_FIELD(ctype,size,pre,name) ctype name; #define STRUCT_AFIELD(ctype,size,pre,name,n) ctype name[n]; #define STRUCT_AFIELD_A(ctype,size,align,pre,name,n) ctype name[n] __attribute__((aligned(align))); #define STRUCT_END(sname) } sname; #endif /*_ASMLANGUAGE||__ASSEMBLER__*/ /* * Kernel vector mode exception stack frame. * * NOTE: due to the limited range of addi used in the current * kernel exception vector, and the fact that historically * the vector is limited to 12 bytes, the size of this * stack frame is limited to 128 bytes (currently at 64). */ STRUCT_BEGIN STRUCT_FIELD (long,4,KEXC_,pc) /* "parm" */ STRUCT_FIELD (long,4,KEXC_,ps) STRUCT_AFIELD(long,4,KEXC_,areg, 4) /* a12 .. a15 */ STRUCT_FIELD (long,4,KEXC_,sar) /* "save" */ #if XCHAL_HAVE_LOOPS STRUCT_FIELD (long,4,KEXC_,lcount) STRUCT_FIELD (long,4,KEXC_,lbeg) STRUCT_FIELD (long,4,KEXC_,lend) #endif #if XCHAL_HAVE_MAC16 STRUCT_FIELD (long,4,KEXC_,acclo) STRUCT_FIELD (long,4,KEXC_,acchi) STRUCT_AFIELD(long,4,KEXC_,mr, 4) #endif STRUCT_END(KernelFrame) /* * User vector mode exception stack frame: * * WARNING: if you modify this structure, you MUST modify the * computation of the pad size (ALIGNPAD) accordingly. */ STRUCT_BEGIN STRUCT_FIELD (long,4,UEXC_,pc) STRUCT_FIELD (long,4,UEXC_,ps) STRUCT_FIELD (long,4,UEXC_,sar) STRUCT_FIELD (long,4,UEXC_,vpri) #ifdef __XTENSA_CALL0_ABI__ STRUCT_FIELD (long,4,UEXC_,a0) #endif STRUCT_FIELD (long,4,UEXC_,a2) STRUCT_FIELD (long,4,UEXC_,a3) STRUCT_FIELD (long,4,UEXC_,a4) STRUCT_FIELD (long,4,UEXC_,a5) #ifdef __XTENSA_CALL0_ABI__ STRUCT_FIELD (long,4,UEXC_,a6) STRUCT_FIELD (long,4,UEXC_,a7) STRUCT_FIELD (long,4,UEXC_,a8) STRUCT_FIELD (long,4,UEXC_,a9) STRUCT_FIELD (long,4,UEXC_,a10) STRUCT_FIELD (long,4,UEXC_,a11) STRUCT_FIELD (long,4,UEXC_,a12) STRUCT_FIELD (long,4,UEXC_,a13) STRUCT_FIELD (long,4,UEXC_,a14) STRUCT_FIELD (long,4,UEXC_,a15) #endif STRUCT_FIELD (long,4,UEXC_,exccause) /* NOTE: can probably rid of this one (pass direct) */ #if XCHAL_HAVE_LOOPS STRUCT_FIELD (long,4,UEXC_,lcount) STRUCT_FIELD (long,4,UEXC_,lbeg) STRUCT_FIELD (long,4,UEXC_,lend) #endif #if XCHAL_HAVE_MAC16 STRUCT_FIELD (long,4,UEXC_,acclo) STRUCT_FIELD (long,4,UEXC_,acchi) STRUCT_AFIELD(long,4,UEXC_,mr, 4) #endif /* ALIGNPAD is the 16-byte alignment padding. */ #ifdef __XTENSA_CALL0_ABI__ # define CALL0_ABI 1 #else # define CALL0_ABI 0 #endif #define ALIGNPAD ((3 + XCHAL_HAVE_LOOPS*1 + XCHAL_HAVE_MAC16*2 + CALL0_ABI*1) & 3) #if ALIGNPAD STRUCT_AFIELD(long,4,UEXC_,pad, ALIGNPAD) /* 16-byte alignment padding */ #endif /*STRUCT_AFIELD_A(char,1,XCHAL_CPEXTRA_SA_ALIGN,UEXC_,ureg, (XCHAL_CPEXTRA_SA_SIZE+3)&-4)*/ /* not used */ STRUCT_END(UserFrame) #if defined(_ASMLANGUAGE) || defined(__ASSEMBLER__) /* Check for UserFrameSize small enough not to require rounding...: */ /* Skip 16-byte save area, then 32-byte space for 8 regs of call12 * (which overlaps with 16-byte GCC nested func chaining area), * then exception stack frame: */ .set UserFrameTotalSize, 16+32+UserFrameSize /* Greater than 112 bytes? (max range of ADDI, both signs, when aligned to 16 bytes): */ .ifgt UserFrameTotalSize-112 /* Round up to 256-byte multiple to accelerate immediate adds: */ .set UserFrameTotalSize, ((UserFrameTotalSize+255) & 0xFFFFFF00) .endif # define ESF_TOTALSIZE UserFrameTotalSize #endif /* _ASMLANGUAGE || __ASSEMBLER__ */ #if XCHAL_NUM_CONTEXTS > 1 /* Structure of info stored on new context's stack for setup: */ STRUCT_BEGIN STRUCT_FIELD (long,4,INFO_,sp) STRUCT_FIELD (long,4,INFO_,arg1) STRUCT_FIELD (long,4,INFO_,funcpc) STRUCT_FIELD (long,4,INFO_,prevps) STRUCT_END(SetupInfo) #endif #define KERNELSTACKSIZE 1024 #endif /* _XTRUNTIME_FRAMES_H_ */