add support for memory commands with Blackfin L1 instruction memory

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

common/cmd_mem.c

@@ -154,9 +154,32 @@ int do_mem_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 		}
 	} while (nbytes > 0);
 #else
-	/* Print the lines. */
-	print_buffer(addr, (void*)addr, size, length, DISP_LINE_LEN/size);
-	addr += size*length;
+
+# if defined(CONFIG_BLACKFIN)
+	/* See if we're trying to display L1 inst */
+	if (addr_bfin_on_chip_mem(addr)) {
+		char linebuf[DISP_LINE_LEN];
+		ulong linebytes, nbytes = length * size;
+		do {
+			linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
+			memcpy(linebuf, (void *)addr, linebytes);
+			print_buffer(addr, linebuf, size, linebytes/size, DISP_LINE_LEN/size);
+
+			nbytes -= linebytes;
+			addr += linebytes;
+			if (ctrlc()) {
+				rc = 1;
+				break;
+			}
+		} while (nbytes > 0);
+	} else
+# endif
+
+	{
+		/* Print the lines. */
+		print_buffer(addr, (void*)addr, size, length, DISP_LINE_LEN/size);
+		addr += size*length;
+	}
 #endif
 
 	dp_last_addr = addr;
@@ -308,6 +331,13 @@ int do_mem_cmp (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	}
 #endif
 
+#ifdef CONFIG_BLACKFIN
+	if (addr_bfin_on_chip_mem(addr1) || addr_bfin_on_chip_mem(addr2)) {
+		puts ("Comparison with L1 instruction memory not supported.\n\r");
+		return 0;
+	}
+#endif
+
 	ngood = 0;
 
 	while (count-- > 0) {
@@ -478,6 +508,14 @@ int do_mem_cp ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	}
 #endif
 
+#ifdef CONFIG_BLACKFIN
+	/* See if we're copying to/from L1 inst */
+	if (addr_bfin_on_chip_mem(dest) || addr_bfin_on_chip_mem(addr)) {
+		memcpy((void *)dest, (void *)addr, count * size);
+		return 0;
+	}
+#endif
+
 	while (count-- > 0) {
 		if (size == 4)
 			*((ulong  *)dest) = *((ulong  *)addr);
@@ -1006,6 +1044,13 @@ mod_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[])
 	}
 #endif
 
+#ifdef CONFIG_BLACKFIN
+	if (addr_bfin_on_chip_mem(addr)) {
+		puts ("Can't modify L1 instruction in place. Use cp instead.\n\r");
+		return 0;
+	}
+#endif
+
 	/* Print the address, followed by value.  Then accept input for
 	 * the next value.  A non-converted value exits.
 	 */