> compile NEMU

221220000 张三
Linux zzy 5.15.146.1-microsoft-standard-WSL2 #1 SMP Thu Jan 11 04:09:03 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
 23:53:05 up 7 days,  8:50,  1 user,  load average: 0.77, 0.88, 0.74

nanos-lite/include/device.h

@@ -8,4 +8,6 @@ size_t events_read(void *buf, size_t offset, size_t len);
 size_t dispinfo_read(void *buf, size_t offset, size_t len);
 size_t fb_write(const void *buf, size_t offset, size_t len);
 
+int _fb_size();
+
 #endif

nanos-lite/src/device.c

@@ -41,6 +41,11 @@ size_t fb_write(const void *buf, size_t offset, size_t len) {
   return len;
 }
 
+int _fb_size() {
+  AM_GPU_CONFIG_T gconf = io_read(AM_GPU_CONFIG);
+  return gconf.vmemsz;
+}
+
 void init_device() {
   Log("Initializing devices...");
   ioe_init();

nanos-lite/src/fs.c

@@ -109,4 +109,5 @@ int fs_close(int fd) {
 
 void init_fs() {
   // TODO: initialize the size of /dev/fb
+  file_table[FD_DEV_FB].size = _fb_size();
 }

navy-apps/libs/libndl/NDL.c

@@ -51,7 +51,15 @@ void NDL_OpenCanvas(int *w, int *h) {
     exit(-1);
   }
   
-  int dev_w, dev_h;
+  int dev_w, dev_h, num;
+  char buf[32];
+  while (fgets(buf, sizeof(buf), fp)) {
+    printf("displayinfo %s\n", buf);
+    sscanf(buf, "%[^:]:%d", buf, &num);
+    if (strcmp(buf, "WIDTH") == 0) dev_w = num;
+    if (strcmp(buf, "HEIGHT") == 0) dev_h = num;
+  }
+  fgets(buf, sizeof(buf), fp);
   if (fscanf(fp, "WIDTH %*c %d\nHEIGHT %*c %d", &dev_w, &dev_h) != 2) {
     printf("cannot parse dispinfo");
     exit(-1);