mx6: clock: take 'num' and 'denom' regs into account when calculating audio/video...

[karo-tx-uboot.git] / doc / README.b4860qds

diff --git a/doc/README.b4860qds b/doc/README.b4860qds
index 3da77d9f0f83a000e1676cf00d11c553cc4ed046..6fcc3bd6e8ae4b4c6a99f9c6b5bcf39ad920c131 100644 (file)
--- a/doc/README.b4860qds
+++ b/doc/README.b4860qds
@@ -119,7 +119,7 @@ B4860QDS Default Settings
 Switch Settings
 ----------------
 
-SW1    OFF [0] OFF [1] OFF [1] OFF [0] OFF [1] OFF [0] OFF [1] OFF [1]
+SW1    OFF [0] OFF [0] OFF [0] OFF [0] OFF [0] OFF [0] OFF [0] OFF [0]
 SW2    ON      ON      ON      ON      ON      ON      OFF     OFF
 SW3    OFF     OFF     OFF     ON      OFF     OFF     ON      OFF
 SW5    OFF     OFF     OFF     OFF     OFF     OFF     ON      ON
@@ -328,3 +328,39 @@ The below commands apply to both B4860QDS and B4420QDS.
    On Linux the interfaces are renamed as:
        . eth2 -> fm1-gb2
        . eth3 -> fm1-gb3
+
+NAND boot with 2 Stage boot loader
+----------------------------------
+PBL initialise the internal SRAM and copy SPL(160KB) in SRAM.
+SPL further initialise DDR using SPD and environment variables and copy
+u-boot(768 KB) from flash to DDR.
+Finally SPL transer control to u-boot for futher booting.
+
+SPL has following features:
+ - Executes within 256K
+ - No relocation required
+
+ Run time view of SPL framework during  boot :-
+ -----------------------------------------------
+ Area        | Address                         |
+-----------------------------------------------
+ Secure boot | 0xFFFC0000 (32KB)               |
+ headers     |                                 |
+ -----------------------------------------------
+ GD, BD      | 0xFFFC8000 (4KB)                |
+ -----------------------------------------------
+ ENV         | 0xFFFC9000 (8KB)                |
+ -----------------------------------------------
+ HEAP        | 0xFFFCB000 (30KB)               |
+ -----------------------------------------------
+ STACK       | 0xFFFD8000 (22KB)               |
+ -----------------------------------------------
+ U-boot SPL  | 0xFFFD8000 (160KB)              |
+ -----------------------------------------------
+
+NAND Flash memory Map on B4860 and B4420QDS
+------------------------------------------
+ Start          End            Definition                      Size
+0x000000       0x0FFFFF        u-boot                          1MB
+0x140000       0x15FFFF        u-boot env                      128KB
+0x1A0000       0x1BFFFF        FMAN Ucode                      128KB