[U-Boot-Users] Hi, I am new to U-Boot, how do I get started?

[Arun Bothe]

Hi,

I am new to U-Boot. Currently I am working for adm5120 board.
I read "readme" file, and "DULG.pdf",  & U-Boot mailing archive also.

ADM5120 / ADM5120P
Specs:

    * 175MHz/227MIPS 4Kc CPU with an embedded cache, 8K-byte I-cache and 8K
D-cache MIPS32
    * 5 IEEE 802.e Fast Ethernet PHY interfaces and 1 GMII/MII interface
    * Two SDRAM banks (each bank 1M-32 up to 32Mx32Bit)(support upto
2Mx32Bytes)
    * Two Flash banks up to 4MB(NOR Flash and Nand Flash), and many more.


I have few questions regarding this, are

My "config.mk" file contains
    #ROM version
    TEXT_BASE = 0x80100000
    PRE_TEXT_BASE = 0xBFC00000

Q1: TEXT_BASE is the location of U-Boot in RAM, means TEXT_BASE points to
SDRAM perticular location? or tell more about TEXT_BASE.
Q2: In my board setting CFG_MONITOR_BASE=TEXT_BASE, means my boot monitor
code reading from EEPROM?
*****************************
For my board setting
#define CFG_SDRAM_BASE             0x80000000     and
#define CFG_MEMTEST_START      0x80100000
#define CFG_MEMTEST_END          0x81000000

Q3: CFG_MEMTEST_START, and CFG_MEMTEST_END are simple memory test area, but
I don't understand purpose of this test or which test and purpose?
*****************************
In my board setting
/* addresses for switch descriptors and buffers
 * reason for those fixed address is that the adm5120 switch
 * engine can only deploy descriptors and packet buffers
 * @ address < 16MB.
 * 0x80000000 ~ 0x80100000 is now reserved, so it SHOULD be safe
 * to put the addresses within this area
 */
#define CFG_PKTBUF_ADDR         0x800C0000
#define CFG_ARPBUF_ADDR         0x800D0000
#define CFG_DESC_ADDR           0x800F0000

Q4: means?

Q5: Which are the other important configuration macro's I've to study? or
I've to pay more attention?

Q6: Where I get more help of U-Boot for ADM5120, excepts the above mentioned
files?
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