sh: Add support 32-Bit Extended Address Mode to sh7785lcr
We can built 'make sh7785lcr_32bit_config'. And add new command "pmb"
for this mode. This command changes PMB for using 512MB system memory.
Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/doc/README.sh7785lcr b/doc/README.sh7785lcr
index c8d8ccd..56455fc 100644
--- a/doc/README.sh7785lcr
+++ b/doc/README.sh7785lcr
@@ -33,6 +33,38 @@
0x40000000 - 0x5fffffff | DDR SDRAM | (cannot use)
+configuration for This board:
+=============================
+
+You can choose configuration as follows:
+
+ - make sh7785lcr_config
+ - make sh7785lcr_32bit_config
+
+When you use "make sh7785lcr_config", there is build U-Boot for 29-bit
+address mode. This mode can use 128MB DDR-SDRAM.
+
+When you use "make sh7785lcr_32bit_config", there is build U-Boot for 32-bit
+extended address mode. This mode can use 384MB DDR-SDRAM. And if you run
+"pmb" command, this mode can use 512MB DDR-SDRAM.
+
+ * 32-bit extended address mode PMB mapping *
+ a) on start-up
+ virt | phys | size | device
+ -------------+---------------+---------------+---------------
+ 0x88000000 | 0x48000000 | 384MB | DDR-SDRAM (Cacheable)
+ 0xa0000000 | 0x00000000 | 64MB | NOR Flash
+ 0xa4000000 | 0x04000000 | 16MB | PLD
+ 0xa6000000 | 0x08000000 | 16MB | USB
+ 0xa8000000 | 0x48000000 | 384MB | DDR-SDRAM (Non-cacheable)
+
+ b) after "pmb" command
+ virt | phys | size | device
+ -------------+---------------+---------------+---------------
+ 0x80000000 | 0x40000000 | 512MB | DDR-SDRAM (Cacheable)
+ 0xa0000000 | 0x40000000 | 512MB | DDR-SDRAM (Non-cacheable)
+
+
This board specific command:
============================
@@ -41,6 +73,7 @@
- hwtest
- printmac
- setmac
+ - pmb (sh7785lcr_32bit_config only)
1. hwtest
@@ -80,3 +113,11 @@
i.e)
=> setmac 00:00:87:**:**:**
+
+
+4. pmb
+
+This command change PMB for DDR-SDRAM all mapping. However you cannot use
+NOR Flash and USB Host on U-Boot when you run this command.
+i.e)
+=> pmb