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187 lines
6.4 KiB
C
187 lines
6.4 KiB
C
/*
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Copyright (c) 2012, Broadcom Europe Ltd
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the copyright holder nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if !defined( VC_DEBUG_SYM_H )
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#define VC_DEBUG_SYM_H
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/* ---- Include Files ----------------------------------------------------- */
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#include <stddef.h>
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#include "interface/vcos/vcos_stdint.h"
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/* ---- Constants and Types ---------------------------------------------- */
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typedef struct
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{
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const char *label;
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uint32_t addr;
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size_t size;
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} VC_DEBUG_SYMBOL_T;
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/*
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* Debug header+params are constructed by makefiles/internals/memorymap.mk
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* (first .text section) and stored in the VC binary
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*/
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typedef struct
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{
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uint32_t symbolTableOffset;
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uint32_t magic;
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uint32_t paramSize;
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} VC_DEBUG_HEADER_T;
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typedef struct
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{
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uint32_t vcMemBase; /* base address of loaded binary */
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uint32_t vcMemSize;
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uint32_t vcEntryPoint;
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uint32_t symbolTableLength;
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} VC_DEBUG_PARAMS_T;
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#define VC_DEBUG_HEADER_MAGIC (('V' << 0) + ('C' << 8) + ('D' << 16) + ('H' << 24))
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// Offset within the videocore memory map to get the address of the debug header.
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#define VC_DEBUG_HEADER_OFFSET 0x2800
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#if (defined( __VC4_BIG_ISLAND__ ) || defined (PLATFORM_RASPBERRYPI)) && !defined( __COVERITY__ )
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/* Use of the debug symbols only makes sense on machines which have
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* some type of shared memory architecture.
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*/
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# define USE_VC_DEBUG_SYMS 1
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#else
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# define USE_VC_DEBUG_SYMS 0
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#endif
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#if USE_VC_DEBUG_SYMS
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# define VCDBG_PRAGMA(foo) pragma foo
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#else
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# define VCDBG_PRAGMA(foo)
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#endif
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/*
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* NOTE: The section name has to start with .init or the linker will
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* purge it out of the image (since nobody has any references to these).
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*/
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#if USE_VC_DEBUG_SYMS
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#define VC_DEBUG_SYMBOL(name,label,addr,size) \
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VCDBG_PRAGMA( Data(LIT, ".init.vc_debug_sym" ); ) \
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static const VC_DEBUG_SYMBOL_T vc_sym_##name = { label, (uint32_t)addr, size }; \
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VCDBG_PRAGMA( Data )
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#else
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#define VC_DEBUG_SYMBOL(name,label,addr,size)
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#endif
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#define VC_DEBUG_VAR(var) VC_DEBUG_SYMBOL(var,#var,&var,sizeof(var))
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/*
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* When using VC_DEBUG_VAR, you typically want to use uncached memory, otherwise
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* it will go in cached memory and the host won't get a coherent view of the
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* memory. So we take advantage of the .ucdata section which gets linked into
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* the uncached memory space.
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*
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* Now this causes another problem, namely that the videocore linker ld/st
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* instructions only have 27-bit relocations, and accessing a global from
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* uncached memory is more than 27-bits away. So we create a couple of macros
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* which can be used to declare a variable and put it into the .ucdata section
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* and another macro which will dereference it as if it were a pointer.
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*
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* To use:
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*
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* VC_DEBUG_DECLARE_UNCACHED_VAR( int, foo, 0xCafeBeef );
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* #define foo VC_DEBUG_ACCESS_UNCACHED_VAR(foo)
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*/
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#define VC_DEBUG_DECLARE_UNCACHED_VAR(var_type,var_name,var_init) \
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VCDBG_PRAGMA( Data(".ucdata"); ) \
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var_type var_name = (var_init); \
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VCDBG_PRAGMA( Data(); ) \
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var_type *vc_var_ptr_##var_name = &var_name; \
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VC_DEBUG_VAR(var_name)
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#define VC_DEBUG_EXTERN_UNCACHED_VAR(var_type,var_name) \
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extern var_type var_name; \
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static var_type *vc_var_ptr_##var_name = &var_name
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#define VC_DEBUG_DECLARE_UNCACHED_STATIC_VAR(var_type,var_name,var_init) \
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VCDBG_PRAGMA( Data(".ucdata"); ) \
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static var_type var_name = (var_init); \
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VCDBG_PRAGMA( Data(); ) \
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static var_type *vc_var_ptr_##var_name = &var_name; \
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VC_DEBUG_VAR(var_name)
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#define VC_DEBUG_DECLARE_UNCACHED_VAR_ZERO(var_type,var_name) \
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VCDBG_PRAGMA( Data(".ucdata"); ) \
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var_type var_name = {0}; \
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VCDBG_PRAGMA( Data(); ) \
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var_type *vc_var_ptr_##var_name = &var_name; \
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VC_DEBUG_VAR(var_name)
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#define VC_DEBUG_DECLARE_UNCACHED_STATIC_VAR_ZERO(var_type,var_name) \
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VCDBG_PRAGMA( Data(".ucdata"); ) \
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static var_type var_name = {0}; \
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VCDBG_PRAGMA( Data(); ) \
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static var_type *vc_var_ptr_##var_name = &var_name; \
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VC_DEBUG_VAR(var_name)
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#define VC_DEBUG_ACCESS_UNCACHED_VAR(var_name) (*vc_var_ptr_##var_name)
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/*
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* Declare a constant character string. This doesn't need to be uncached
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* since it never changes.
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*/
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#define VC_DEBUG_DECLARE_STRING_VAR(var_name,var_init) \
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const char var_name[] = var_init; \
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VC_DEBUG_VAR(var_name)
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/*
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* Since some variable aren't actually referenced by the videocore
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* this variant uses a .init.* section to ensure that the variable
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* doesn't get pruned by the linker.
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*/
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#define VC_DEBUG_DECLARE_UNCACHED_STATIC_VAR_NO_PTR(var_type,var_name,var_init) \
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VCDBG_PRAGMA( Data(".init.ucdata"); ) \
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static var_type var_name = (var_init); \
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VCDBG_PRAGMA( Data(); ) \
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VC_DEBUG_VAR(var_name)
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/* ---- Variable Externs ------------------------------------------------- */
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#if USE_VC_DEBUG_SYMS
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extern VC_DEBUG_SYMBOL_T __VC_DEBUG_SYM_START[];
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extern VC_DEBUG_SYMBOL_T __VC_DEBUG_SYM_END[];
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#endif
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/* ---- Function Prototypes ---------------------------------------------- */
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#endif /* VC_DEBUG_SYM_H */
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