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   1 #ifndef EXCITE_FPGA_H_INCLUDED
   2 #define EXCITE_FPGA_H_INCLUDED
   3
   4
   5 /**
   6  * Address alignment of the individual FPGA bytes.
   7  * The address arrangement of the individual bytes of the FPGA is two
   8  * byte aligned at the embedded MK2 platform.
   9  */
  10 #ifdef EXCITE_CCI_FPGA_MK2
  11 typedef unsigned char excite_cci_fpga_align_t __attribute__ ((aligned(2)));
  12 #else
  13 typedef unsigned char excite_cci_fpga_align_t;
  14 #endif
  15
  16
  17 /**
  18  * Size of Dual Ported RAM.
  19  */
  20 #define EXCITE_DPR_SIZE 263
  21
  22
  23 /**
  24  * Size of Reserved Status Fields in Dual Ported RAM.
  25  */
  26 #define EXCITE_DPR_STATUS_SIZE 7
  27
  28
  29
  30 /**
  31  * FPGA.
  32  * Hardware register layout of the FPGA interface. The FPGA must accessed
  33  * byte wise solely.
  34  * @see EXCITE_CCI_DPR_MK2
  35  */
  36 typedef struct excite_fpga {
  37
  38         /**
  39          * Dual Ported RAM.
  40          */
  41         excite_cci_fpga_align_t dpr[EXCITE_DPR_SIZE];
  42
  43         /**
  44          * Status.
  45          */
  46         excite_cci_fpga_align_t status[EXCITE_DPR_STATUS_SIZE];
  47
  48 #ifdef EXCITE_CCI_FPGA_MK2
  49         /**
  50          * RM9000 Interrupt.
  51          * Write access initiates interrupt at the RM9000 (MIPS) processor of the eXcite.
  52          */
  53         excite_cci_fpga_align_t rm9k_int;
  54 #else
  55         /**
  56          * MK2 Interrupt.
  57          * Write access initiates interrupt at the ARM processor of the MK2.
  58          */
  59         excite_cci_fpga_align_t mk2_int;
  60
  61         excite_cci_fpga_align_t gap[0x1000-0x10f];
  62
  63         /**
  64          * IRQ Source/Acknowledge.
  65          */
  66         excite_cci_fpga_align_t rm9k_irq_src;
  67
  68         /**
  69          * IRQ Mask.
  70          * Set bits enable the related interrupt.
  71          */
  72         excite_cci_fpga_align_t rm9k_irq_mask;
  73 #endif
  74
  75
  76 } excite_fpga;
  77
  78
  79
  80 #endif  /* ndef EXCITE_FPGA_H_INCLUDED */