diff options
Diffstat (limited to 'libSYS/src/linux/genericStds_linux.cpp')
| -rw-r--r-- | libSYS/src/linux/genericStds_linux.cpp | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/libSYS/src/linux/genericStds_linux.cpp b/libSYS/src/linux/genericStds_linux.cpp new file mode 100644 index 0000000..ce10f9c --- /dev/null +++ b/libSYS/src/linux/genericStds_linux.cpp @@ -0,0 +1,232 @@ +/************************** Fraunhofer IIS FDK SysLib ********************** + + (C) Copyright Fraunhofer IIS (2006) + All Rights Reserved + + Please be advised that this software and/or program delivery is + Confidential Information of Fraunhofer and subject to and covered by the + + Fraunhofer IIS Software Evaluation Agreement + between Google Inc. and Fraunhofer + effective and in full force since March 1, 2012. + + You may use this software and/or program only under the terms and + conditions described in the above mentioned Fraunhofer IIS Software + Evaluation Agreement. Any other and/or further use requires a separate agreement. + + + $Id$ + Author(s): Manuel Jander + Description: Linux genericStds (mostly kernel SRAM driver bindings) + + This software and/or program is protected by copyright law and international + treaties. Any reproduction or distribution of this software and/or program, + or any portion of it, may result in severe civil and criminal penalties, and + will be prosecuted to the maximum extent possible under law. + +******************************************************************************/ + + +/* + * NOTE: it makes only sense to enable this if you also have the corresponding + * GNU/Linux kernel driver to access fast SRAM. + */ +#if defined(__arm__) /* || defined(__mips__) */ + +/** + * EABI static linking problem workaround + * + * These function are normally present in libc.a but + * apparently can be linked only statically. + * While using C++ (iisisoff) that is a problem, + * because it wont work (static global constructors + * cause problems with static linked programs). + * So the workaround is to include those functions here, + * because libSYS.a is linked statically, and libc can be + * linked dynamically as usual. + * + * Add more EABI functions here if you get unresolved + * symbols of EABI functions. + */ +#include <string.h> + +#ifdef __cplusplus +extern "C" { +#endif +void __aeabi_memcpy(void *dest, void *src, int size) +{ + memcpy(dest, src, size); +} +void __aeabi_memcpy4(void *dest, void *src, int size) +{ + memcpy(dest, src, size); +} +void __aeabi_memmove4(void *dest, void *src, int size) +{ + memmove(dest, src, size); +} +void __aeabi_memclr(void *ptr, int size) +{ + memset(ptr, 0, size); +} +void __aeabi_memclr4(void *ptr, int size) +{ + memset(ptr, 0, size); +} +#ifdef __cplusplus +} +#endif + +/* Include Linux kernel config, or set ARCH and processor macros directly */ +/* +#define CONFIG_ARCH_MXC +#define CONFIG_ARCH_MX25 +*/ + +#if defined(CONFIG_ARCH_OMAP3) +#define KERNEL_SRAM_SIZE 65536 +#elif defined(CONFIG_ARCH_MX31) +#define KERNEL_SRAM_SIZE 16384 +#elif defined(CONFIG_ARCH_MX25) +#define KERNEL_SRAM_SIZE 131072 +#elif defined(CONFIG_ARCH_MX35) +#define KERNEL_SRAM_SIZE 131072 +#else +#define KERNEL_SRAM_SIZE 0 +#endif + +#if (KERNEL_SRAM_SIZE > 0) +#define KERNEL_SCRATCH_SIZE (4096) +#define FDK_SCRATCHBUF_SIZE (KERNEL_SCRATCH_SIZE/sizeof(INT)) +#define DATA_L1_A_SIZE (KERNEL_SRAM_SIZE-KERNEL_SCRATCH_SIZE) + +#define RESOURCE_scratchBuffer +#define FUNCTION_FDKprolog +#define FUNCTION_FDKepilog + +static unsigned char *L1_DATA_A=NULL; +static unsigned char *_a=NULL; + + +#ifdef RESOURCE_scratchBuffer +static INT *__scratchBuffer; +static unsigned char *__pScratchBuffer = NULL; +#endif + + +#ifdef __linux__ + +#include <stdio.h> +#include <sys/mman.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <unistd.h> + +static int fd; +static inline void * getSram(void) +{ + unsigned long *ptr = NULL; + + /* Open driver */ + fd = open("/dev/sram", 0); + if (fd < 0) + { + printf("Unable to open /dev/sram. Fallback to malloc\n"); + /* Signal "no sram driver at use". */ + fd = -1; + /* Return malloced pointer (fallback) */ + return FDKaalloc(KERNEL_SRAM_SIZE, 8); + } + + /* Get memory mapped into CPU (virtual) address space */ + ptr = (unsigned long *)mmap(NULL, KERNEL_SRAM_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); + if(ptr == MAP_FAILED) + { + printf("Unable to mmap(). Fallback to malloc\n"); + /* Give up on the sram driver */ + close(fd); + /* Signal "no sram driver at use". */ + fd = -1; + /* Return malloced pointer (fallback) */ + ptr = (unsigned long *)FDKaalloc(KERNEL_SRAM_SIZE, 8); + } + + + /* Return pointer to sram */ + return (void*)ptr; +} + +static inline void freeSram(void* ptr) +{ + /* Check if sram driver is being used. */ + if (fd == -1) + { + FDKafree(ptr); + return; + } + + /* Unmap memory */ + munmap(ptr, KERNEL_SRAM_SIZE); + /* Close driver */ + close(fd); + + return; +} + +#else + +static inline void * getSram(void) +{ + return FDKaalloc(KERNEL_SRAM_SIZE, 8); +} +static inline void * freeSram(void* ptr) +{ + FDKafree(ptr); +} + +#endif + + +#ifdef FUNCTION_FDKprolog +void FDKprolog(void) +{ + unsigned char *addr = (unsigned char*)getSram(); + + + if (addr == NULL) + { + printf("SRAM allocation failed ! This is fatal.\n"); + exit(-1); + } + +#ifdef RESOURCE_scratchBuffer + __scratchBuffer = (INT*) ( addr + (KERNEL_SRAM_SIZE-KERNEL_SCRATCH_SIZE) ); + __pScratchBuffer = addr + (KERNEL_SRAM_SIZE); +#endif + + printf("SRAM @ 0x%08x\n", (unsigned int) addr); + atexit(FDKepilog); + + FDKprolog_generic(); +} +#endif + +#ifdef FUNCTION_FDKepilog +void FDKepilog(void) +{ + /* Because of atexit(), make sure to call this only once */ + if (L1_DATA_A != NULL) + { + freeSram(L1_DATA_A); + L1_DATA_A = NULL; + + FDKepilog_generic(); + } +} +#endif + +#endif /* KERNEL_SRAM > 0 */ + +#endif /* ifdef __arm__ */ + |