src/memory.h

   1 //
   2 // MEMORY.H: Header file
   3 //
   4 // All Jaguar related memory and I/O locations are contained in this file
   5 //
   6 // JPM = Jean-Paul Mari <djipi.mari@gmail.com>
   7 //
   8 // Who  When        What
   9 // ---  ----------  -------------------------------------------------------------
  10 // JPM  06/16/2016  Added a Big to Little endian
  11 //
  12
  13 #ifndef __MEMORY_H__
  14 #define __MEMORY_H__
  15
  16 #include <stdint.h>
  17
  18 extern uint8_t jagMemSpace[];
  19
  20 extern uint8_t * jaguarMainRAM;
  21 extern uint8_t * jaguarMainROM;
  22 extern uint8_t * gpuRAM;
  23 extern uint8_t * dspRAM;
  24
  25 #if 1
  26 extern uint32_t & butch, & dscntrl;
  27 extern uint16_t & ds_data;
  28 extern uint32_t & i2cntrl, & sbcntrl, & subdata, & subdatb, & sb_time, & fifo_data, & i2sdat2, & unknown;
  29 #else
  30 extern uint32_t butch, dscntrl, ds_data, i2cntrl, sbcntrl, subdata, subdatb, sb_time, fifo_data, i2sdat2, unknown;
  31 #endif
  32
  33 extern uint16_t & memcon1, & memcon2, & hc, & vc, & lph, & lpv;
  34 extern uint64_t & obData;
  35 extern uint32_t & olp;
  36 extern uint16_t & obf, & vmode, & bord1, & bord2, & hp, & hbb, & hbe, & hs,
  37         & hvs, & hdb1, & hdb2, & hde, & vp, & vbb, & vbe, & vs, & vdb, & vde,
  38         & veb, & vee, & vi, & pit0, & pit1, & heq;
  39 extern uint32_t & bg;
  40 extern uint16_t & int1, & int2;
  41 extern uint8_t * clut, * lbuf;
  42 extern uint32_t & g_flags, & g_mtxc, & g_mtxa, & g_end, & g_pc, & g_ctrl,
  43         & g_hidata, & g_divctrl;
  44 extern uint32_t g_remain;
  45 extern uint32_t & a1_base, & a1_flags, & a1_clip, & a1_pixel, & a1_step,
  46         & a1_fstep, & a1_fpixel, & a1_inc, & a1_finc, & a2_base, & a2_flags,
  47         & a2_mask, & a2_pixel, & a2_step, & b_cmd, & b_count;
  48 extern uint64_t & b_srcd, & b_dstd, & b_dstz, & b_srcz1, & b_srcz2, & b_patd;
  49 extern uint32_t & b_iinc, & b_zinc, & b_stop, & b_i3, & b_i2, & b_i1, & b_i0, & b_z3,
  50         & b_z2, & b_z1, & b_z0;
  51 extern uint16_t & jpit1, & jpit2, & jpit3, & jpit4, & clk1, & clk2, & clk3, & j_int,
  52         & asidata, & asictrl;
  53 extern uint16_t asistat;
  54 extern uint16_t & asiclk, & joystick, & joybuts;
  55 extern uint32_t & d_flags, & d_mtxc, & d_mtxa, & d_end, & d_pc, & d_ctrl,
  56         & d_mod, & d_divctrl;
  57 extern uint32_t d_remain;
  58 extern uint32_t & d_machi;
  59 extern uint16_t & ltxd, lrxd, & rtxd, rrxd;
  60 extern uint8_t & sclk, sstat;
  61 extern uint32_t & smode;
  62 /*
  63 uint16_t & ltxd      = *((uint16_t *)&jagMemSpace[0xF1A148]);
  64 uint16_t lrxd;                                                                  // Dual register with $F1A148
  65 uint16_t & rtxd      = *((uint16_t *)&jagMemSpace[0xF1A14C]);
  66 uint16_t rrxd;                                                                  // Dual register with $F1A14C
  67 uint8_t  & sclk      = *((uint8_t *) &jagMemSpace[0xF1A150]);
  68 uint8_t sstat;                                                                  // Dual register with $F1A150
  69 uint32_t & smode     = *((uint32_t *)&jagMemSpace[0xF1A154]);
  70 */
  71
  72 // Read/write tracing enumeration
  73
  74 enum { UNKNOWN, JAGUAR, DSP, GPU, TOM, JERRY, M68K, BLITTER, OP, DEBUG };
  75 extern const char * whoName[10];
  76
  77 // BIOS identification enum
  78
  79 //enum { BIOS_NORMAL=0x01, BIOS_CD=0x02, BIOS_STUB1=0x04, BIOS_STUB2=0x08, BIOS_DEV_CD=0x10 };
  80 //extern int biosAvailable;
  81
  82 // Some handy macros to help converting native endian to big endian (jaguar native)
  83 // & vice versa
  84
  85 #define SET64(r, a, v)  r[(a)] = ((v) & 0xFF00000000000000) >> 56, r[(a)+1] = ((v) & 0x00FF000000000000) >> 48, \
  86                                                 r[(a)+2] = ((v) & 0x0000FF0000000000) >> 40, r[(a)+3] = ((v) & 0x000000FF00000000) >> 32, \
  87                                                 r[(a)+4] = ((v) & 0xFF000000) >> 24, r[(a)+5] = ((v) & 0x00FF0000) >> 16, \
  88                                                 r[(a)+6] = ((v) & 0x0000FF00) >> 8, r[(a)+7] = (v) & 0x000000FF
  89 #define GET64(r, a)             (((uint64_t)r[(a)] << 56) | ((uint64_t)r[(a)+1] << 48) | \
  90                                                 ((uint64_t)r[(a)+2] << 40) | ((uint64_t)r[(a)+3] << 32) | \
  91                                                 ((uint64_t)r[(a)+4] << 24) | ((uint64_t)r[(a)+5] << 16) | \
  92                                                 ((uint64_t)r[(a)+6] << 8) | (uint64_t)r[(a)+7])
  93 #define SET32(r, a, v)  r[(a)] = ((v) & 0xFF000000) >> 24, r[(a)+1] = ((v) & 0x00FF0000) >> 16, \
  94                                                 r[(a)+2] = ((v) & 0x0000FF00) >> 8, r[(a)+3] = (v) & 0x000000FF
  95 #define GET32(r, a)             ((r[(a)] << 24) | (r[(a)+1] << 16) | (r[(a)+2] << 8) | r[(a)+3])
  96 #define SET16(r, a, v)  r[(a)] = ((v) & 0xFF00) >> 8, r[(a)+1] = (v) & 0xFF
  97 #define GET16(r, a)             ((r[(a)] << 8) | r[(a)+1])
  98
  99 #define BigToLittleEndian16(a)  (((a & 0xFF) << 8) | (a >> 8))
 100 #define BigToLittleEndian32(a)  (((a & 0xFF) << 24) | ((a & 0xFF00) << 8) | ((a & 0xFF0000) >> 8) | ((a & 0xFF000000) >> 24))
 101
 102 //This doesn't seem to work on OSX. So have to figure something else out. :-(
 103 //byteswap.h doesn't exist on OSX.
 104 #if 0
 105 // This is GCC specific, but we can fix that if we need to...
 106 // Big plus of this approach is that these compile down to single instructions on little
 107 // endian machines while one big endian machines we don't have any overhead. :-)
 108
 109 #include <byteswap.h>
 110 #include <endian.h>
 111
 112 #if __BYTE_ORDER == __LITTLE_ENDIAN
 113         #define ESAFE16(x)      bswap_16(x)
 114         #define ESAFE32(x)      bswap_32(x)
 115         #define ESAFE64(x)      bswap_64(x)
 116 #else
 117         #define ESAFE16(x)      (x)
 118         #define ESAFE32(x)      (x)
 119         #define ESAFE64(x)      (x)
 120 #endif
 121 #endif
 122
 123 #if 0
 124 Stuff ripped out of Hatari, that may be useful:
 125
 126 /* Can the actual CPU access unaligned memory? */
 127 #ifndef CPU_CAN_ACCESS_UNALIGNED
 128 # if defined(__i386__) || defined(powerpc) || defined(__mc68020__)
 129 #  define CPU_CAN_ACCESS_UNALIGNED 1
 130 # else
 131 #  define CPU_CAN_ACCESS_UNALIGNED 0
 132 # endif
 133 #endif
 134
 135
 136 /* If the CPU can access unaligned memory, use these accelerated functions: */
 137 #if CPU_CAN_ACCESS_UNALIGNED
 138
 139 #include <SDL_endian.h>
 140
 141
 142 static inline uae_u32 do_get_mem_long(void *a)
 143 {
 144         return SDL_SwapBE32(*(uae_u32 *)a);
 145 }
 146
 147 static inline uae_u16 do_get_mem_word(void *a)
 148 {
 149         return SDL_SwapBE16(*(uae_u16 *)a);
 150 }
 151
 152
 153 static inline void do_put_mem_long(void *a, uae_u32 v)
 154 {
 155         *(uae_u32 *)a = SDL_SwapBE32(v);
 156 }
 157
 158 static inline void do_put_mem_word(void *a, uae_u16 v)
 159 {
 160         *(uae_u16 *)a = SDL_SwapBE16(v);
 161 }
 162
 163
 164 #else  /* Cpu can not access unaligned memory: */
 165
 166
 167 static inline uae_u32 do_get_mem_long(void *a)
 168 {
 169         uae_u8 *b = (uae_u8 *)a;
 170
 171         return (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | b[3];
 172 }
 173
 174 static inline uae_u16 do_get_mem_word(void *a)
 175 {
 176         uae_u8 *b = (uae_u8 *)a;
 177
 178         return (b[0] << 8) | b[1];
 179 }
 180
 181
 182 static inline void do_put_mem_long(void *a, uae_u32 v)
 183 {
 184         uae_u8 *b = (uae_u8 *)a;
 185
 186         b[0] = v >> 24;
 187         b[1] = v >> 16;
 188         b[2] = v >> 8;
 189         b[3] = v;
 190 }
 191
 192 static inline void do_put_mem_word(void *a, uae_u16 v)
 193 {
 194         uae_u8 *b = (uae_u8 *)a;
 195
 196         b[0] = v >> 8;
 197         b[1] = v;
 198 }
 199
 200
 201 #endif  /* CPU_CAN_ACCESS_UNALIGNED */
 202
 203
 204 /* These are same for all architectures: */
 205
 206 static inline uae_u8 do_get_mem_byte(uae_u8 *a)
 207 {
 208         return *a;
 209 }
 210
 211 static inline void do_put_mem_byte(uae_u8 *a, uae_u8 v)
 212 {
 213         *a = v;
 214 }
 215 #endif
 216
 217 #endif  // __MEMORY_H__