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+/************************** 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:
+
+ 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.
+
+******************************************************************************/
+
+#define RESOURCE_scratchBuffer
+#define FUNCTION_FDKprolog
+#define FUNCTION_FDKepilog
+
+#define MIPS_VIRTUAL_START (0x80000000)
+/* value below is defined in simulator config (MipsMemIntf-{24KE,4KE}.cfg) */
+#define MIPS_SDE_SCRATCHPAD (0x00058000)
+
+//#define MIPS_SRAM_SIZE (32768)
+#define MIPS_SRAM_SIZE (4096)
+
+#define MIPS_SCRATCH_SIZE (4096)
+#define DATA_L1_A_SIZE (MIPS_SRAM_SIZE-MIPS_SCRATCH_SIZE)
+
+
+
+
+#ifdef RESOURCE_scratchBuffer
+#define FDK_SCRATCHBUF_SIZE 1024
+static LONG *___scratchBuffer = NULL;
+static LONG *__scratchBuffer = NULL;
+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 access sram. Fallback to malloc\n");
+ /* Signal "no sram driver at use". */
+ fd = -1;
+ /* Return malloced pointer (fallback) */
+ return malloc(MIPS_SRAM_SIZE);
+ }
+
+ /* Get memory mapped into CPU (virtual) address space */
+ ptr = (unsigned long *)mmap(NULL, MIPS_SRAM_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
+ if(ptr == MAP_FAILED)
+ {
+ printf("Unable to access sram. 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 *)malloc(MIPS_SRAM_SIZE);
+ }
+
+
+ /* Return pointer to sram */
+ return (void*)ptr;
+}
+
+static inline void freeSram(void* ptr)
+{
+ /* Check if sram driver is being used. */
+ if (fd == -1)
+ {
+ free(ptr);
+ return;
+ }
+
+ /* Unmap memory */
+ munmap(ptr, MIPS_SRAM_SIZE);
+ /* Close driver */
+ close(fd);
+
+ return;
+}
+
+#elif defined(__SDE_MIPS__)
+
+#include <stdio.h>
+#include <mips/cpu.h>
+
+static int hasISPRAM, hasDSPRAM;
+
+static inline void * getSram(void)
+{
+ void *addr;
+ unsigned int Config;
+
+ Config = mips_getconfig();
+ hasISPRAM = (Config >> 24) & 1;
+ hasDSPRAM = (Config >> 23) & 1;
+
+ FDKprintf("Config ISP/DSP: %d/%d\n", hasISPRAM, hasDSPRAM);
+
+ if (hasDSPRAM) {
+ long paddr, laddr;
+
+ FDKprintf("wrong\n");
+ paddr = MIPS_SDE_SCRATCHPAD;
+ /* Fixed mapping of kseg0: 0x80000000-0x9fffffff virtual => 0x00000000-0x1fffffff physical */
+ laddr = MIPS_VIRTUAL_START + MIPS_SDE_SCRATCHPAD;
+ addr = (void*)(laddr);
+ } else {
+ FDKprintf("ok\n");
+ addr = malloc(MIPS_SRAM_SIZE);
+ FDKprintf("addr %d\n", (int)addr);
+ }
+ return addr;
+}
+static inline void freeSram(void* ptr)
+{
+ if (!hasDSPRAM) {
+ free(ptr);
+ }
+}
+
+#else
+
+static inline void * getSram(void)
+{
+ return malloc(MIPS_SRAM_SIZE);
+}
+static inline void freeSram(void* ptr)
+{
+ free(ptr);
+}
+
+#endif
+
+
+#ifdef FUNCTION_FDKprolog
+void FDKprolog(void)
+{
+ unsigned char *addr;
+
+#ifdef _MIPS_ARCH_MIPS32R2
+ unsigned status;
+ asm volatile("mfc0 %0, $12, 0;\n" : "=r" (status));
+ status |= (1 << 24);
+ asm volatile("mtc0 %0, $12, 0;\n" :: "r" (status));
+#endif
+
+ addr = (unsigned char*)getSram();
+ if (addr == NULL) {
+ FDKprintfErr("SRAM allocation failed ! This is fatal.\n");
+ exit(-1);
+ } else {
+ FDKprintf("SRAM @ 0x%08x, size = 0x%x\n", (unsigned int) addr, MIPS_SRAM_SIZE);
+ }
+
+
+#ifdef RESOURCE_scratchBuffer
+ ___scratchBuffer = (LONG*)(addr + MIPS_SRAM_SIZE - MIPS_SCRATCH_SIZE);
+#endif
+
+ atexit(FDKepilog);
+
+ FDKprolog_generic();
+}
+#endif
+
+#ifdef FUNCTION_FDKepilog
+void FDKepilog(void)
+{
+
+#ifdef _MIPS_ARCH_MIPS32R2
+ unsigned status;
+ asm volatile("mfc0 %0, $12, 0;\n" : "=r" (status));
+ status &= ~(1 << 24);
+ asm volatile("mtc0 %0, $12, 0;\n" :: "r" (status));
+#endif
+
+ FDKepilog_generic();
+}
+#endif
+
+
+#if !defined(__linux__)
+
+#define FUNCTION_FDKclock
+
+#ifndef MIPS_CPU_CLK
+#define MIPS_CPU_CLK 100000000
+#endif
+
+INT FDKclock(void) {
+ INT clk;
+
+ asm volatile ("mfc0 %0,$9 " : "=r" (clk));
+ return clk;
+}
+
+#endif /* !defined(__linux__) */