powerpc: Remove configs/B4420QDS_NAND_defconfig board

[platform/kernel/u-boot.git] / board / freescale / bsc9131rdb / README

diff --git a/board/freescale/bsc9131rdb/README b/board/freescale/bsc9131rdb/README
index 065faa3..c840597 100644 (file)
--- a/board/freescale/bsc9131rdb/README
+++ b/board/freescale/bsc9131rdb/README
@@ -86,13 +86,17 @@ Default Boot Method
 --------------------
 NAND boot
 
-Building U-boot
+Building U-Boot
 --------------
-To build the u-boot for BSC9131RDB:
-1. NAND Flash
+To build the U-Boot for BSC9131RDB:
+1. NAND Flash with sysclk 66MHz(J16 on RDB closed, default)
        make BSC9131RDB_NAND
-2. SPI Flash
+2. NAND Flash with sysclk 100MHz(J16 on RDB open)
+       make BSC9131RDB_NAND_SYSCLK100
+3. SPI Flash with sysclk 66MHz(J16 on RDB closed, default)
        make BSC9131RDB_SPIFLASH
+4. SPI Flash with sysclk 100MHz(J16 on RDB open)
+       make BSC9131RDB_SPIFLASH_SYSCLK100
 
 Memory map
 -----------
@@ -107,9 +111,19 @@ Memory map
  0xFF70_0000   0xFF7F_FFFF     PA CCSR                 1M
  0xFF80_0000   0xFFFF_FFFF     Boot Page & NAND Buffer 8M
 
+DDR Memory map
+---------------
+ 0x0000_0000   0x36FF_FFFF     Memory passed onto Linux
+ 0x3700_0000   0x37FF_FFFF     PowerPC-DSP shared control area
+ 0x3800_0000   0x4FFF_FFFF     DSP Private area
+
+ Out of 880M, passed onto Linux, 1hugetlb page of 256M is reserved for
+ data communcation between PowerPC and DSP core.
+ Rest is PowerPC private area.
+
 Flashing Images
 ---------------
-To place a new u-boot image in the NAND flash and then boot
+To place a new U-Boot image in the NAND flash and then boot
 with that new image temporarily, use this:
        tftp 1000000 u-boot-nand.bin
        nand erase 0 100000