prog.c

来自「LEON3 SOC environment, PCI bridges.」· C语言 代码 · 共 87 行

#include <stdio.h>

main(){
   int i;
   unsigned char a = 0;
   unsigned int burstl = 132; // Burst length
   unsigned int offset = 0x0; // Memory offset in the target system
   volatile unsigned int *mes = 0x20000000; 
   volatile unsigned int *mem = 0x40000000; 
   volatile unsigned int *p = 0xD0000000;//0x40010000;//0xD0000000; // Pointer to local data
   volatile unsigned int *p2= p + (burstl & 0xFFFFFFF0) + 0x20; // Pointer to read back data
   volatile unsigned int *dma = 0x80000500; // DMA controller
   volatile unsigned int *pci_apb = 0x80000400; //PCI Master controller
   volatile unsigned int *pci_ahb = 0xe4000000; //AHB address the PCI Master
   

   // Generate test data
   for(i=0;i<burstl;i++){ 
      *(p+i) = (unsigned int)i;
   }
   *(p+i) = 0xafafafaf; // Append testdata with "AFAFAFAF"
   mem = p + i + 1; // Address to write simulation result
  
   // Start DMA write
   *(dma+1) = p;                   // AHB address
   *(dma+2) = 0x44000000 + offset; // PCI address
   *(dma+3) = burstl;              // burst length
   *dma = 0x87;                    // 0x87 = Write

   // Wait for DMA to be ready
   do{
      i=10;while(i--);
   }while((*dma & 0x4) == 0);

   // Start DMA read
   *(dma+1) = p2;
   *(dma+2) = 0x44000000 + offset;
   *(dma+3) = burstl;
   *dma = 0x85;

   // Wait for DMA to be ready
   do{
      i=10;while(i--);
   }while((*dma & 0x4) == 0);
   
//   *(dma+1) = p2 + (burstl & 0xFFFFFFF0) + 0x20;
//   *(dma+2) = 0x44000000 + offset + 16;
//   *(dma+3) = 2;
//   *dma = 0x85;
//
//   do{
//      i=10;while(i--);
//   }while((*dma & 0x4) == 0);
   
   // Compare data
   *mem = 0x0E;
   for(i=0;i<burstl;i++){
      if (*(p+i) != *(p2+i)){
         *mem = 0x1E;
      }
   }

// Some single PCI accesses 
//   *pci_apb = 0x40000000;
//   *(mem + 1) = *(pci_ahb + 127);
//
//   
//   mem = 0x40011000;
//   *pci_apb = 0x40000000;
//   
//   for(i=0;i<burstl;i++){
//      *(mem + i) = *(pci_ahb + i);
//   }
//   
//   *(mem + burstl + 1) = 0x0E;
//   for(i=0;i<burstl;i++){
//      if (*(p+i) != *(mem+i)){
//         *(mem + burstl + 1) = 0x1E;
//      }
//   }
   
   // End simulation with error
   i=100;while(i--);
   *mes = 0x1;
   while(1==1);
}