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root/cebix/BasiliskII/src/Unix/main_unix.cpp
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Comparing BasiliskII/src/Unix/main_unix.cpp (file contents):
Revision 1.8 by cebix, 1999-10-31T23:18:36Z vs.
Revision 1.9 by cebix, 1999-11-03T10:56:28Z

# Line 58 | Line 58
58   #include "mon.h"
59   #endif
60  
61 + #ifdef USE_MAPPED_MEMORY
62 + #include <sys/mman.h>
63 + extern char *address_space, *good_address_map;
64 + #endif
65 +
66  
67   // Constants
68   const char ROM_FILE_NAME[] = "ROM";
# Line 178 | Line 183 | int main(int argc, char **argv)
183                  if (!PrefsEditor())
184                          QuitEmulator();
185  
186 <        // Create area for Mac RAM
186 >        // Read RAM size
187          RAMSize = PrefsFindInt32("ramsize") & 0xfff00000;       // Round down to 1MB boundary
188          if (RAMSize < 1024*1024) {
189                  WarningAlert(GetString(STR_SMALL_RAM_WARN));
190                  RAMSize = 1024*1024;
191          }
187 –        RAMBaseHost = new uint8[RAMSize];
192  
193 <        // Create area for Mac ROM
193 >        // Create areas for Mac RAM and ROM
194 > #ifdef USE_MAPPED_MEMORY
195 >    int fd = open("/dev/zero", O_RDWR);
196 >    good_address_map = (char *)mmap(NULL, 1<<24, PROT_READ, MAP_PRIVATE, fd, 0);
197 >    address_space = (char *)mmap(NULL, 1<<24, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
198 >    if ((int)address_space < 0 || (int)good_address_map < 0) {
199 >                ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
200 >                QuitEmulator();
201 >    }
202 >    RAMBaseHost = (uint8 *)mmap(address_space, RAMSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, fd, 0);
203 >    ROMBaseHost = (uint8 *)mmap(address_space + 0x00400000, 0x80000, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, fd, 0);
204 >    close(fd);
205 >        char *nam = tmpnam(NULL);
206 >    int good_address_fd = open(nam, O_CREAT | O_RDWR, 0600);
207 >        char buffer[4096];
208 >    memset(buffer, 1, sizeof(buffer));
209 >    write(good_address_fd, buffer, sizeof(buffer));
210 >    unlink(nam);
211 >    for (int i=0; i<RAMSize; i+=4096)
212 >        mmap(good_address_map + i, 4096, PROT_READ, MAP_FIXED | MAP_PRIVATE, good_address_fd, 0);
213 >    for (int i=0; i<0x80000; i+=4096)
214 >        mmap(good_address_map + i + 0x00400000, 4096, PROT_READ, MAP_FIXED | MAP_PRIVATE, good_address_fd, 0);
215 > #else
216 >        RAMBaseHost = new uint8[RAMSize];
217          ROMBaseHost = new uint8[0x100000];
218 + #endif
219  
220          // Get rom file path from preferences
221          const char *rom_path = PrefsFindString("rom");

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