arm: bcmcygnus: Enable Ethernet support

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

diff --git a/doc/README.b4860qds b/doc/README.b4860qds
index 48ece4b835d6330d6d695ec80e14abd7278dbc52..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
@@ -227,17 +227,17 @@ Start Address     End Address     Description     Size
 NOR Flash memory Map on B4860 and B4420QDS
 ------------------------------------------
  Start          End            Definition                      Size
-0xEFF80000     0xEFFFFFFF      u-boot (current bank)           512KB
-0xEFF60000     0xEFF7FFFF      u-boot env (current bank)       128KB
-0xEFF40000     0xEFF5FFFF      FMAN Ucode (current bank)       128KB
-0xEF300000     0xEFF3FFFF      rootfs (alternate bank)         12MB + 256KB
+0xEFF40000     0xEFFFFFFF      u-boot (current bank)           768KB
+0xEFF20000     0xEFF3FFFF      u-boot env (current bank)       128KB
+0xEFF00000     0xEFF1FFFF      FMAN Ucode (current bank)       128KB
+0xEF300000     0xEFEFFFFF      rootfs (alternate bank)         12MB
 0xEE800000     0xEE8FFFFF      device tree (alternate bank)    1MB
 0xEE020000     0xEE6FFFFF      Linux.uImage (alternate bank)   6MB+896KB
 0xEE000000     0xEE01FFFF      RCW (alternate bank)            128KB
-0xEDF80000     0xEDFFFFFF      u-boot (alternate bank)         512KB
-0xEDF60000     0xEDF7FFFF      u-boot env (alternate bank)     128KB
-0xEDF40000     0xEDF5FFFF      FMAN ucode (alternate bank)     128KB
-0xED300000     0xEDF3FFFF      rootfs (current bank)           12MB+256MB
+0xEDF40000     0xEDFFFFFF      u-boot (alternate bank)         768KB
+0xEDF20000     0xEDF3FFFF      u-boot env (alternate bank)     128KB
+0xEDF00000     0xEDF1FFFF      FMAN ucode (alternate bank)     128KB
+0xED300000     0xEDEFFFFF      rootfs (current bank)           12MB
 0xEC800000     0xEC8FFFFF      device tree (current bank)      1MB
 0xEC020000     0xEC6FFFFF      Linux.uImage (current bank)     6MB+896KB
 0xEC000000     0xEC01FFFF      RCW (current bank)              128KB
@@ -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