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
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