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Fix compiler issues cause by formatting assembly code on ESP32 port (#133)

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Carl Lundin 2020-08-21 10:55:58 -07:00 committed by GitHub
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588
portable/ThirdParty/GCC/Xtensa_ESP32/include/xtensa_context.h vendored
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@ -1,44 +1,44 @@
/******************************************************************************* /*******************************************************************************
* Copyright (c) 2006-2015 Cadence Design Systems Inc. Copyright (c) 2006-2015 Cadence Design Systems Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish, without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to permit persons to whom the Software is furnished to do so, subject to
* the following conditions: the following conditions:
*
* The above copyright notice and this permission notice shall be included The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software. in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
* -------------------------------------------------------------------------------- --------------------------------------------------------------------------------
*
* XTENSA CONTEXT FRAMES AND MACROS FOR RTOS ASSEMBLER SOURCES XTENSA CONTEXT FRAMES AND MACROS FOR RTOS ASSEMBLER SOURCES
*
* This header contains definitions and macros for use primarily by Xtensa This header contains definitions and macros for use primarily by Xtensa
* RTOS assembly coded source files. It includes and uses the Xtensa hardware RTOS assembly coded source files. It includes and uses the Xtensa hardware
* abstraction layer (HAL) to deal with config specifics. It may also be abstraction layer (HAL) to deal with config specifics. It may also be
* included in C source files. included in C source files.
*
* !! Supports only Xtensa Exception Architecture 2 (XEA2). XEA1 not supported. !! !! Supports only Xtensa Exception Architecture 2 (XEA2). XEA1 not supported. !!
*
* NOTE: The Xtensa architecture requires stack pointer alignment to 16 bytes. NOTE: The Xtensa architecture requires stack pointer alignment to 16 bytes.
*
*******************************************************************************/ *******************************************************************************/
#ifndef XTENSA_CONTEXT_H #ifndef XTENSA_CONTEXT_H
#define XTENSA_CONTEXT_H #define XTENSA_CONTEXT_H
#ifdef __ASSEMBLER__ #ifdef __ASSEMBLER__
#include <xtensa/coreasm.h> #include <xtensa/coreasm.h>
#endif #endif
#include <xtensa/config/tie.h> #include <xtensa/config/tie.h>
@ -48,335 +48,331 @@
/* Align a value up to nearest n-byte boundary, where n is a power of 2. */ /* Align a value up to nearest n-byte boundary, where n is a power of 2. */
#define ALIGNUP( n, val ) ( ( ( val ) + ( n ) - 1 ) & -( n ) ) #define ALIGNUP(n, val) (((val) + (n)-1) & -(n))
/* /*
* ------------------------------------------------------------------------------- -------------------------------------------------------------------------------
* Macros that help define structures for both C and assembler. Macros that help define structures for both C and assembler.
* ------------------------------------------------------------------------------- -------------------------------------------------------------------------------
*/ */
#ifdef STRUCT_BEGIN #ifdef STRUCT_BEGIN
#undef STRUCT_BEGIN #undef STRUCT_BEGIN
#undef STRUCT_FIELD #undef STRUCT_FIELD
#undef STRUCT_AFIELD #undef STRUCT_AFIELD
#undef STRUCT_END #undef STRUCT_END
#endif #endif
#if defined( _ASMLANGUAGE ) || defined( __ASSEMBLER__ ) #if defined(_ASMLANGUAGE) || defined(__ASSEMBLER__)
#define STRUCT_BEGIN .pushsection.text; .struct 0 #define STRUCT_BEGIN .pushsection .text; .struct 0
#define STRUCT_FIELD( ctype, size, asname, name ) asname:.space size #define STRUCT_FIELD(ctype,size,asname,name) asname: .space size
#define STRUCT_AFIELD( ctype, size, asname, name, n ) asname:.space( size ) *( n ) #define STRUCT_AFIELD(ctype,size,asname,name,n) asname: .space (size)*(n)
#define STRUCT_END( sname ) sname ## Size:; .popsection #define STRUCT_END(sname) sname##Size:; .popsection
#else #else
#define STRUCT_BEGIN typedef struct { #define STRUCT_BEGIN typedef struct {
#define STRUCT_FIELD( ctype, size, asname, name ) ctype name; #define STRUCT_FIELD(ctype,size,asname,name) ctype name;
#define STRUCT_AFIELD( ctype, size, asname, name, n ) ctype name[ n ]; #define STRUCT_AFIELD(ctype,size,asname,name,n) ctype name[n];
#define STRUCT_END( sname ) \ #define STRUCT_END(sname) } sname;
} \
sname;
#endif //_ASMLANGUAGE || __ASSEMBLER__ #endif //_ASMLANGUAGE || __ASSEMBLER__
/* /*
* ------------------------------------------------------------------------------- -------------------------------------------------------------------------------
* INTERRUPT/EXCEPTION STACK FRAME FOR A THREAD OR NESTED INTERRUPT INTERRUPT/EXCEPTION STACK FRAME FOR A THREAD OR NESTED INTERRUPT
*
* A stack frame of this structure is allocated for any interrupt or exception.
* It goes on the current stack. If the RTOS has a system stack for handling
* interrupts, every thread stack must allow space for just one interrupt stack
* frame, then nested interrupt stack frames go on the system stack.
*
* The frame includes basic registers (explicit) and "extra" registers introduced
* by user TIE or the use of the MAC16 option in the user's Xtensa config.
* The frame size is minimized by omitting regs not applicable to user's config.
*
* For Windowed ABI, this stack frame includes the interruptee's base save area,
* another base save area to manage gcc nested functions, and a little temporary
* space to help manage the spilling of the register windows.
* -------------------------------------------------------------------------------
*/
STRUCT_BEGIN STRUCT_FIELD( long, A stack frame of this structure is allocated for any interrupt or exception.
4, It goes on the current stack. If the RTOS has a system stack for handling
XT_STK_EXIT, interrupts, every thread stack must allow space for just one interrupt stack
exit ) /* exit point for dispatch */ frame, then nested interrupt stack frames go on the system stack.
STRUCT_FIELD( long, 4, XT_STK_PC, pc ) /* return PC */
STRUCT_FIELD( long, 4, XT_STK_PS, ps ) /* return PS */ The frame includes basic registers (explicit) and "extra" registers introduced
STRUCT_FIELD( long, 4, XT_STK_A0, a0 ) by user TIE or the use of the MAC16 option in the user's Xtensa config.
STRUCT_FIELD( long, 4, XT_STK_A1, a1 ) /* stack pointer before interrupt */ The frame size is minimized by omitting regs not applicable to user's config.
STRUCT_FIELD( long, 4, XT_STK_A2, a2 )
STRUCT_FIELD( long, 4, XT_STK_A3, a3 ) For Windowed ABI, this stack frame includes the interruptee's base save area,
STRUCT_FIELD( long, 4, XT_STK_A4, a4 ) another base save area to manage gcc nested functions, and a little temporary
STRUCT_FIELD( long, 4, XT_STK_A5, a5 ) space to help manage the spilling of the register windows.
STRUCT_FIELD( long, 4, XT_STK_A6, a6 ) -------------------------------------------------------------------------------
STRUCT_FIELD( long, 4, XT_STK_A7, a7 ) */
STRUCT_FIELD( long, 4, XT_STK_A8, a8 )
STRUCT_FIELD( long, 4, XT_STK_A9, a9 ) STRUCT_BEGIN
STRUCT_FIELD( long, 4, XT_STK_A10, a10 ) STRUCT_FIELD (long, 4, XT_STK_EXIT, exit) /* exit point for dispatch */
STRUCT_FIELD( long, 4, XT_STK_A11, a11 ) STRUCT_FIELD (long, 4, XT_STK_PC, pc) /* return PC */
STRUCT_FIELD( long, 4, XT_STK_A12, a12 ) STRUCT_FIELD (long, 4, XT_STK_PS, ps) /* return PS */
STRUCT_FIELD( long, 4, XT_STK_A13, a13 ) STRUCT_FIELD (long, 4, XT_STK_A0, a0)
STRUCT_FIELD( long, 4, XT_STK_A14, a14 ) STRUCT_FIELD (long, 4, XT_STK_A1, a1) /* stack pointer before interrupt */
STRUCT_FIELD( long, 4, XT_STK_A15, a15 ) STRUCT_FIELD (long, 4, XT_STK_A2, a2)
STRUCT_FIELD( long, 4, XT_STK_SAR, sar ) STRUCT_FIELD (long, 4, XT_STK_A3, a3)
STRUCT_FIELD( long, 4, XT_STK_EXCCAUSE, exccause ) STRUCT_FIELD (long, 4, XT_STK_A4, a4)
STRUCT_FIELD( long, 4, XT_STK_EXCVADDR, excvaddr ) STRUCT_FIELD (long, 4, XT_STK_A5, a5)
STRUCT_FIELD (long, 4, XT_STK_A6, a6)
STRUCT_FIELD (long, 4, XT_STK_A7, a7)
STRUCT_FIELD (long, 4, XT_STK_A8, a8)
STRUCT_FIELD (long, 4, XT_STK_A9, a9)
STRUCT_FIELD (long, 4, XT_STK_A10, a10)
STRUCT_FIELD (long, 4, XT_STK_A11, a11)
STRUCT_FIELD (long, 4, XT_STK_A12, a12)
STRUCT_FIELD (long, 4, XT_STK_A13, a13)
STRUCT_FIELD (long, 4, XT_STK_A14, a14)
STRUCT_FIELD (long, 4, XT_STK_A15, a15)
STRUCT_FIELD (long, 4, XT_STK_SAR, sar)
STRUCT_FIELD (long, 4, XT_STK_EXCCAUSE, exccause)
STRUCT_FIELD (long, 4, XT_STK_EXCVADDR, excvaddr)
#if XCHAL_HAVE_LOOPS #if XCHAL_HAVE_LOOPS
STRUCT_FIELD( long, 4, XT_STK_LBEG, lbeg ) STRUCT_FIELD (long, 4, XT_STK_LBEG, lbeg)
STRUCT_FIELD( long, 4, XT_STK_LEND, lend ) STRUCT_FIELD (long, 4, XT_STK_LEND, lend)
STRUCT_FIELD( long, 4, XT_STK_LCOUNT, lcount ) STRUCT_FIELD (long, 4, XT_STK_LCOUNT, lcount)
#endif #endif
#ifndef __XTENSA_CALL0_ABI__ #ifndef __XTENSA_CALL0_ABI__
/* Temporary space for saving stuff during window spill */ /* Temporary space for saving stuff during window spill */
STRUCT_FIELD( long, 4, XT_STK_TMP0, tmp0 ) STRUCT_FIELD (long, 4, XT_STK_TMP0, tmp0)
STRUCT_FIELD( long, 4, XT_STK_TMP1, tmp1 ) STRUCT_FIELD (long, 4, XT_STK_TMP1, tmp1)
STRUCT_FIELD( long, 4, XT_STK_TMP2, tmp2 ) STRUCT_FIELD (long, 4, XT_STK_TMP2, tmp2)
#endif #endif
#ifdef XT_USE_SWPRI #ifdef XT_USE_SWPRI
/* Storage for virtual priority mask */ /* Storage for virtual priority mask */
STRUCT_FIELD( long, 4, XT_STK_VPRI, vpri ) STRUCT_FIELD (long, 4, XT_STK_VPRI, vpri)
#endif #endif
#ifdef XT_USE_OVLY #ifdef XT_USE_OVLY
/* Storage for overlay state */ /* Storage for overlay state */
STRUCT_FIELD( long, 4, XT_STK_OVLY, ovly ) STRUCT_FIELD (long, 4, XT_STK_OVLY, ovly)
#endif #endif
STRUCT_END( XtExcFrame ) STRUCT_END(XtExcFrame)
#if defined( _ASMLANGUAGE ) || defined( __ASSEMBLER__ ) #if defined(_ASMLANGUAGE) || defined(__ASSEMBLER__)
#define XT_STK_NEXT1 XtExcFrameSize #define XT_STK_NEXT1 XtExcFrameSize
#else #else
#define XT_STK_NEXT1 sizeof( XtExcFrame ) #define XT_STK_NEXT1 sizeof(XtExcFrame)
#endif #endif
/* Allocate extra storage if needed */ /* Allocate extra storage if needed */
#if XCHAL_EXTRA_SA_SIZE != 0 #if XCHAL_EXTRA_SA_SIZE != 0
#if XCHAL_EXTRA_SA_ALIGN <= 16 #if XCHAL_EXTRA_SA_ALIGN <= 16
#define XT_STK_EXTRA ALIGNUP( XCHAL_EXTRA_SA_ALIGN, XT_STK_NEXT1 ) #define XT_STK_EXTRA ALIGNUP(XCHAL_EXTRA_SA_ALIGN, XT_STK_NEXT1)
#else #else
/* If need more alignment than stack, add space for dynamic alignment */ /* If need more alignment than stack, add space for dynamic alignment */
#define XT_STK_EXTRA ( ALIGNUP( XCHAL_EXTRA_SA_ALIGN, XT_STK_NEXT1 ) + XCHAL_EXTRA_SA_ALIGN ) #define XT_STK_EXTRA (ALIGNUP(XCHAL_EXTRA_SA_ALIGN, XT_STK_NEXT1) + XCHAL_EXTRA_SA_ALIGN)
#endif #endif
#define XT_STK_NEXT2 ( XT_STK_EXTRA + XCHAL_EXTRA_SA_SIZE ) #define XT_STK_NEXT2 (XT_STK_EXTRA + XCHAL_EXTRA_SA_SIZE)
#else #else
#define XT_STK_NEXT2 XT_STK_NEXT1 #define XT_STK_NEXT2 XT_STK_NEXT1
#endif /* if XCHAL_EXTRA_SA_SIZE != 0 */ #endif
/* /*
* ------------------------------------------------------------------------------- -------------------------------------------------------------------------------
* This is the frame size. Add space for 4 registers (interruptee's base save This is the frame size. Add space for 4 registers (interruptee's base save
* area) and some space for gcc nested functions if any. area) and some space for gcc nested functions if any.
* ------------------------------------------------------------------------------- -------------------------------------------------------------------------------
*/ */
#define XT_STK_FRMSZ ( ALIGNUP( 0x10, XT_STK_NEXT2 ) + 0x20 ) #define XT_STK_FRMSZ (ALIGNUP(0x10, XT_STK_NEXT2) + 0x20)
/* /*
* ------------------------------------------------------------------------------- -------------------------------------------------------------------------------
* SOLICITED STACK FRAME FOR A THREAD SOLICITED STACK FRAME FOR A THREAD
*
* A stack frame of this structure is allocated whenever a thread enters the A stack frame of this structure is allocated whenever a thread enters the
* RTOS kernel intentionally (and synchronously) to submit to thread scheduling. RTOS kernel intentionally (and synchronously) to submit to thread scheduling.
* It goes on the current thread's stack. It goes on the current thread's stack.
*
* The solicited frame only includes registers that are required to be preserved The solicited frame only includes registers that are required to be preserved
* by the callee according to the compiler's ABI conventions, some space to save by the callee according to the compiler's ABI conventions, some space to save
* the return address for returning to the caller, and the caller's PS register. the return address for returning to the caller, and the caller's PS register.
*
* For Windowed ABI, this stack frame includes the caller's base save area. For Windowed ABI, this stack frame includes the caller's base save area.
*
* Note on XT_SOL_EXIT field: Note on XT_SOL_EXIT field:
* It is necessary to distinguish a solicited from an interrupt stack frame. It is necessary to distinguish a solicited from an interrupt stack frame.
* This field corresponds to XT_STK_EXIT in the interrupt stack frame and is This field corresponds to XT_STK_EXIT in the interrupt stack frame and is
* always at the same offset (0). It can be written with a code (usually 0) always at the same offset (0). It can be written with a code (usually 0)
* to distinguish a solicted frame from an interrupt frame. An RTOS port may to distinguish a solicted frame from an interrupt frame. An RTOS port may
* opt to ignore this field if it has another way of distinguishing frames. opt to ignore this field if it has another way of distinguishing frames.
* ------------------------------------------------------------------------------- -------------------------------------------------------------------------------
*/ */
STRUCT_BEGIN STRUCT_BEGIN
#ifdef __XTENSA_CALL0_ABI__ #ifdef __XTENSA_CALL0_ABI__
STRUCT_FIELD( long, STRUCT_FIELD (long, 4, XT_SOL_EXIT, exit)
4, STRUCT_FIELD (long, 4, XT_SOL_PC, pc)
XT_SOL_EXIT, STRUCT_FIELD (long, 4, XT_SOL_PS, ps)
exit ) STRUCT_FIELD (long, 4, XT_SOL_NEXT, next)
STRUCT_FIELD( long, 4, XT_SOL_PC, pc ) STRUCT_FIELD (long, 4, XT_SOL_A12, a12) /* should be on 16-byte alignment */
STRUCT_FIELD( long, 4, XT_SOL_PS, ps ) STRUCT_FIELD (long, 4, XT_SOL_A13, a13)
STRUCT_FIELD( long, 4, XT_SOL_NEXT, next ) STRUCT_FIELD (long, 4, XT_SOL_A14, a14)
STRUCT_FIELD( long, 4, XT_SOL_A12, a12 ) /* should be on 16-byte alignment */ STRUCT_FIELD (long, 4, XT_SOL_A15, a15)
STRUCT_FIELD( long, 4, XT_SOL_A13, a13 ) #else
STRUCT_FIELD( long, 4, XT_SOL_A14, a14 ) STRUCT_FIELD (long, 4, XT_SOL_EXIT, exit)
STRUCT_FIELD( long, 4, XT_SOL_A15, a15 ) STRUCT_FIELD (long, 4, XT_SOL_PC, pc)
#else /* ifdef __XTENSA_CALL0_ABI__ */ STRUCT_FIELD (long, 4, XT_SOL_PS, ps)
STRUCT_FIELD( long, 4, XT_SOL_EXIT, exit ) STRUCT_FIELD (long, 4, XT_SOL_NEXT, next)
STRUCT_FIELD( long, 4, XT_SOL_PC, pc ) STRUCT_FIELD (long, 4, XT_SOL_A0, a0) /* should be on 16-byte alignment */
STRUCT_FIELD( long, 4, XT_SOL_PS, ps ) STRUCT_FIELD (long, 4, XT_SOL_A1, a1)
STRUCT_FIELD( long, 4, XT_SOL_NEXT, next ) STRUCT_FIELD (long, 4, XT_SOL_A2, a2)
STRUCT_FIELD( long, 4, XT_SOL_A0, a0 ) /* should be on 16-byte alignment */ STRUCT_FIELD (long, 4, XT_SOL_A3, a3)
STRUCT_FIELD( long, 4, XT_SOL_A1, a1 ) #endif
STRUCT_FIELD( long, 4, XT_SOL_A2, a2 ) STRUCT_END(XtSolFrame)
STRUCT_FIELD( long, 4, XT_SOL_A3, a3 )
#endif /* ifdef __XTENSA_CALL0_ABI__ */
STRUCT_END( XtSolFrame )
/* Size of solicited stack frame */ /* Size of solicited stack frame */
#define XT_SOL_FRMSZ ALIGNUP( 0x10, XtSolFrameSize ) #define XT_SOL_FRMSZ ALIGNUP(0x10, XtSolFrameSize)
/* /*
* ------------------------------------------------------------------------------- -------------------------------------------------------------------------------
* CO-PROCESSOR STATE SAVE AREA FOR A THREAD CO-PROCESSOR STATE SAVE AREA FOR A THREAD
*
* The RTOS must provide an area per thread to save the state of co-processors The RTOS must provide an area per thread to save the state of co-processors
* when that thread does not have control. Co-processors are context-switched when that thread does not have control. Co-processors are context-switched
* lazily (on demand) only when a new thread uses a co-processor instruction, lazily (on demand) only when a new thread uses a co-processor instruction,
* otherwise a thread retains ownership of the co-processor even when it loses otherwise a thread retains ownership of the co-processor even when it loses
* control of the processor. An Xtensa co-processor exception is triggered when control of the processor. An Xtensa co-processor exception is triggered when
* any co-processor instruction is executed by a thread that is not the owner, any co-processor instruction is executed by a thread that is not the owner,
* and the context switch of that co-processor is then peformed by the handler. and the context switch of that co-processor is then peformed by the handler.
* Ownership represents which thread's state is currently in the co-processor. Ownership represents which thread's state is currently in the co-processor.
*
* Co-processors may not be used by interrupt or exception handlers. If an Co-processors may not be used by interrupt or exception handlers. If an
* co-processor instruction is executed by an interrupt or exception handler, co-processor instruction is executed by an interrupt or exception handler,
* the co-processor exception handler will trigger a kernel panic and freeze. the co-processor exception handler will trigger a kernel panic and freeze.
* This restriction is introduced to reduce the overhead of saving and restoring This restriction is introduced to reduce the overhead of saving and restoring
* co-processor state (which can be quite large) and in particular remove that co-processor state (which can be quite large) and in particular remove that
* overhead from interrupt handlers. overhead from interrupt handlers.
*
* The co-processor state save area may be in any convenient per-thread location The co-processor state save area may be in any convenient per-thread location
* such as in the thread control block or above the thread stack area. It need such as in the thread control block or above the thread stack area. It need
* not be in the interrupt stack frame since interrupts don't use co-processors. not be in the interrupt stack frame since interrupts don't use co-processors.
*
* Along with the save area for each co-processor, two bitmasks with flags per Along with the save area for each co-processor, two bitmasks with flags per
* co-processor (laid out as in the CPENABLE reg) help manage context-switching co-processor (laid out as in the CPENABLE reg) help manage context-switching
* co-processors as efficiently as possible: co-processors as efficiently as possible:
*
* XT_CPENABLE XT_CPENABLE
* The contents of a non-running thread's CPENABLE register. The contents of a non-running thread's CPENABLE register.
* It represents the co-processors owned (and whose state is still needed) It represents the co-processors owned (and whose state is still needed)
* by the thread. When a thread is preempted, its CPENABLE is saved here. by the thread. When a thread is preempted, its CPENABLE is saved here.
* When a thread solicits a context-swtich, its CPENABLE is cleared - the When a thread solicits a context-swtich, its CPENABLE is cleared - the
* compiler has saved the (caller-saved) co-proc state if it needs to. compiler has saved the (caller-saved) co-proc state if it needs to.
* When a non-running thread loses ownership of a CP, its bit is cleared. When a non-running thread loses ownership of a CP, its bit is cleared.
* When a thread runs, it's XT_CPENABLE is loaded into the CPENABLE reg. When a thread runs, it's XT_CPENABLE is loaded into the CPENABLE reg.
* Avoids co-processor exceptions when no change of ownership is needed. Avoids co-processor exceptions when no change of ownership is needed.
*
* XT_CPSTORED XT_CPSTORED
* A bitmask with the same layout as CPENABLE, a bit per co-processor. A bitmask with the same layout as CPENABLE, a bit per co-processor.
* Indicates whether the state of each co-processor is saved in the state Indicates whether the state of each co-processor is saved in the state
* save area. When a thread enters the kernel, only the state of co-procs save area. When a thread enters the kernel, only the state of co-procs
* still enabled in CPENABLE is saved. When the co-processor exception still enabled in CPENABLE is saved. When the co-processor exception
* handler assigns ownership of a co-processor to a thread, it restores handler assigns ownership of a co-processor to a thread, it restores
* the saved state only if this bit is set, and clears this bit. the saved state only if this bit is set, and clears this bit.
*
* XT_CP_CS_ST XT_CP_CS_ST
* A bitmask with the same layout as CPENABLE, a bit per co-processor. A bitmask with the same layout as CPENABLE, a bit per co-processor.
* Indicates whether callee-saved state is saved in the state save area. Indicates whether callee-saved state is saved in the state save area.
* Callee-saved state is saved by itself on a solicited context switch, Callee-saved state is saved by itself on a solicited context switch,
* and restored when needed by the coprocessor exception handler. and restored when needed by the coprocessor exception handler.
* Unsolicited switches will cause the entire coprocessor to be saved Unsolicited switches will cause the entire coprocessor to be saved
* when necessary. when necessary.
*
* XT_CP_ASA XT_CP_ASA
* Pointer to the aligned save area. Allows it to be aligned more than Pointer to the aligned save area. Allows it to be aligned more than
* the overall save area (which might only be stack-aligned or TCB-aligned). the overall save area (which might only be stack-aligned or TCB-aligned).
* Especially relevant for Xtensa cores configured with a very large data Especially relevant for Xtensa cores configured with a very large data
* path that requires alignment greater than 16 bytes (ABI stack alignment). path that requires alignment greater than 16 bytes (ABI stack alignment).
* ------------------------------------------------------------------------------- -------------------------------------------------------------------------------
*/ */
#if XCHAL_CP_NUM > 0 #if XCHAL_CP_NUM > 0
/* Offsets of each coprocessor save area within the 'aligned save area': */ /* Offsets of each coprocessor save area within the 'aligned save area': */
#define XT_CP0_SA 0 #define XT_CP0_SA 0
#define XT_CP1_SA ALIGNUP( XCHAL_CP1_SA_ALIGN, XT_CP0_SA + XCHAL_CP0_SA_SIZE ) #define XT_CP1_SA ALIGNUP(XCHAL_CP1_SA_ALIGN, XT_CP0_SA + XCHAL_CP0_SA_SIZE)
#define XT_CP2_SA ALIGNUP( XCHAL_CP2_SA_ALIGN, XT_CP1_SA + XCHAL_CP1_SA_SIZE ) #define XT_CP2_SA ALIGNUP(XCHAL_CP2_SA_ALIGN, XT_CP1_SA + XCHAL_CP1_SA_SIZE)
#define XT_CP3_SA ALIGNUP( XCHAL_CP3_SA_ALIGN, XT_CP2_SA + XCHAL_CP2_SA_SIZE ) #define XT_CP3_SA ALIGNUP(XCHAL_CP3_SA_ALIGN, XT_CP2_SA + XCHAL_CP2_SA_SIZE)
#define XT_CP4_SA ALIGNUP( XCHAL_CP4_SA_ALIGN, XT_CP3_SA + XCHAL_CP3_SA_SIZE ) #define XT_CP4_SA ALIGNUP(XCHAL_CP4_SA_ALIGN, XT_CP3_SA + XCHAL_CP3_SA_SIZE)
#define XT_CP5_SA ALIGNUP( XCHAL_CP5_SA_ALIGN, XT_CP4_SA + XCHAL_CP4_SA_SIZE ) #define XT_CP5_SA ALIGNUP(XCHAL_CP5_SA_ALIGN, XT_CP4_SA + XCHAL_CP4_SA_SIZE)
#define XT_CP6_SA ALIGNUP( XCHAL_CP6_SA_ALIGN, XT_CP5_SA + XCHAL_CP5_SA_SIZE ) #define XT_CP6_SA ALIGNUP(XCHAL_CP6_SA_ALIGN, XT_CP5_SA + XCHAL_CP5_SA_SIZE)
#define XT_CP7_SA ALIGNUP( XCHAL_CP7_SA_ALIGN, XT_CP6_SA + XCHAL_CP6_SA_SIZE ) #define XT_CP7_SA ALIGNUP(XCHAL_CP7_SA_ALIGN, XT_CP6_SA + XCHAL_CP6_SA_SIZE)
#define XT_CP_SA_SIZE ALIGNUP( 16, XT_CP7_SA + XCHAL_CP7_SA_SIZE ) #define XT_CP_SA_SIZE ALIGNUP(16, XT_CP7_SA + XCHAL_CP7_SA_SIZE)
/* Offsets within the overall save area: */ /* Offsets within the overall save area: */
#define XT_CPENABLE 0 /* (2 bytes) coprocessors active for this thread */ #define XT_CPENABLE 0 /* (2 bytes) coprocessors active for this thread */
#define XT_CPSTORED 2 /* (2 bytes) coprocessors saved for this thread */ #define XT_CPSTORED 2 /* (2 bytes) coprocessors saved for this thread */
#define XT_CP_CS_ST 4 /* (2 bytes) coprocessor callee-saved regs stored for this thread */ #define XT_CP_CS_ST 4 /* (2 bytes) coprocessor callee-saved regs stored for this thread */
#define XT_CP_ASA 8 /* (4 bytes) ptr to aligned save area */ #define XT_CP_ASA 8 /* (4 bytes) ptr to aligned save area */
/* Overall size allows for dynamic alignment: */ /* Overall size allows for dynamic alignment: */
#define XT_CP_SIZE ( 12 + XT_CP_SA_SIZE + XCHAL_TOTAL_SA_ALIGN ) #define XT_CP_SIZE (12 + XT_CP_SA_SIZE + XCHAL_TOTAL_SA_ALIGN)
#else /* if XCHAL_CP_NUM > 0 */ #else
#define XT_CP_SIZE 0 #define XT_CP_SIZE 0
#endif /* if XCHAL_CP_NUM > 0 */
/*
* Macro to get the current core ID. Only uses the reg given as an argument.
* Reading PRID on the ESP32 gives us 0xCDCD on the PRO processor (0)
* and 0xABAB on the APP CPU (1). We can distinguish between the two by checking
* bit 13: it's 1 on the APP and 0 on the PRO processor.
*/
#ifdef __ASSEMBLER__
.macro getcoreid reg
rsr.prid \ reg
extui \ reg, \ reg, 13, 1
.endm
#endif #endif
#define CORE_ID_PRO 0xCDCD
#define CORE_ID_APP 0xABAB
/* /*
* ------------------------------------------------------------------------------- Macro to get the current core ID. Only uses the reg given as an argument.
* MACROS TO HANDLE ABI SPECIFICS OF FUNCTION ENTRY AND RETURN Reading PRID on the ESP32 gives us 0xCDCD on the PRO processor (0)
* and 0xABAB on the APP CPU (1). We can distinguish between the two by checking
* Convenient where the frame size requirements are the same for both ABIs. bit 13: it's 1 on the APP and 0 on the PRO processor.
* ENTRY(sz), RET(sz) are for framed functions (have locals or make calls). */
* ENTRY0, RET0 are for frameless functions (no locals, no calls). #ifdef __ASSEMBLER__
* .macro getcoreid reg
* where size = size of stack frame in bytes (must be >0 and aligned to 16). rsr.prid \reg
* For framed functions the frame is created and the return address saved at extui \reg,\reg,13,1
* base of frame (Call0 ABI) or as determined by hardware (Windowed ABI). .endm
* For frameless functions, there is no frame and return address remains in a0. #endif
* Note: Because CPP macros expand to a single line, macros requiring multi-line
* expansions are implemented as assembler macros. #define CORE_ID_PRO 0xCDCD
* ------------------------------------------------------------------------------- #define CORE_ID_APP 0xABAB
*/
/*
-------------------------------------------------------------------------------
MACROS TO HANDLE ABI SPECIFICS OF FUNCTION ENTRY AND RETURN
Convenient where the frame size requirements are the same for both ABIs.
ENTRY(sz), RET(sz) are for framed functions (have locals or make calls).
ENTRY0, RET0 are for frameless functions (no locals, no calls).
where size = size of stack frame in bytes (must be >0 and aligned to 16).
For framed functions the frame is created and the return address saved at
base of frame (Call0 ABI) or as determined by hardware (Windowed ABI).
For frameless functions, there is no frame and return address remains in a0.
Note: Because CPP macros expand to a single line, macros requiring multi-line
expansions are implemented as assembler macros.
-------------------------------------------------------------------------------
*/
#ifdef __ASSEMBLER__ #ifdef __ASSEMBLER__
#ifdef __XTENSA_CALL0_ABI__ #ifdef __XTENSA_CALL0_ABI__
/* Call0 */ /* Call0 */
#define ENTRY( sz ) entry1 sz #define ENTRY(sz) entry1 sz
.macro entry1 size = 0x10 .macro entry1 size=0x10
addi sp, sp, -\ size addi sp, sp, -\size
s32i a0, sp, 0 s32i a0, sp, 0
.endm .endm
#define ENTRY0 #define ENTRY0
#define RET( sz ) ret1 sz #define RET(sz) ret1 sz
.macro ret1 size = 0x10 .macro ret1 size=0x10
l32i a0, sp, 0 l32i a0, sp, 0
addi sp, sp, \ size addi sp, sp, \size
ret ret
.endm .endm
#define RET0 ret #define RET0 ret
#else /* ifdef __XTENSA_CALL0_ABI__ */ #else
/* Windowed */ /* Windowed */
#define ENTRY( sz ) entry sp, sz #define ENTRY(sz) entry sp, sz
#define ENTRY0 entry sp, 0x10 #define ENTRY0 entry sp, 0x10
#define RET( sz ) retw #define RET(sz) retw
#define RET0 retw #define RET0 retw
#endif /* ifdef __XTENSA_CALL0_ABI__ */ #endif
#endif /* ifdef __ASSEMBLER__ */ #endif
#endif /* XTENSA_CONTEXT_H */ #endif /* XTENSA_CONTEXT_H */