Rearrange Linux memory to make the computer fit in a 64x64 square

Author: object-Object

linux/buildroot/board/mlogv32/dts/mlogv32.dtb

@@ -32,7 +32,7 @@
     memory@80000000 {
         device_type = "memory";
         // the last 256K are reserved for OpenSBI
-        reg = <0x80000000 (16*1024*1024 - 256*1024)>;
+        reg = <0x80000000 (14*1024*1024 - 256*1024)>;
     };
 
     cpus {

linux/buildroot/board/mlogv32/dts/mlogv32.dts

@@ -1,3 +1,5 @@
+#define FAST_ROM y
+
 .set UART0_BASE, 0xf0000010
 
 .macro log message
@@ -64,8 +66,10 @@ do_print:
 2:
     ret
 
+#ifndef FAST_ROM
 .section .loader, "ax", @progbits
 .balign 4
+#endif
 loader:
     // copy kernel to RAM
     // we do this here so the copy operation can be covered by the icache

linux/buildroot/board/mlogv32/zsbl/zsbl.S

@@ -3,7 +3,7 @@ ENTRY(_start)
 
 /* memory size definitions */
 __ROM = 16M;
-__RAM = 16M;
+__RAM = 14M;
 
 MEMORY {
     /* ROM */

linux/buildroot/board/mlogv32/zsbl/zsbl.ld

@@ -36,9 +36,9 @@ configs:
 
   linux:
     MEMORY_X_OFFSET: -9
-    MEMORY_Y_OFFSET: !py!sum [[-16, -0, -16, -16, -16]]
+    MEMORY_Y_OFFSET: !py!sum [[-16, -0, -16, -14, -14]]
     MEMORY_WIDTH: 64
-    PROGRAM_ROM_ROWS: 0
-    DATA_ROM_ROWS: 16
-    RAM_ROWS: 16
-    ICACHE_ROWS: 16
+    PROGRAM_ROM_ROWS: 8
+    DATA_ROM_ROWS: 8
+    RAM_ROWS: 14
+    ICACHE_ROWS: 14