Prathima,

The address 0x0F010000 is the base address. It gives you the acess to the internal memory register. Example:

The BR0's address = 0x0F010000 + 100 The OR0's address = 0x0F010000 + 104......

Tien Nghiem -----Original Message----- From: u-boot-users-admin@lists.sourceforge.net [mailto:u-boot-users-admin@lists.sourceforge.net]On Behalf Of Prathima_Kolar Sent: Tuesday, September 28, 2004 8:09 AM To: 'U-Boot-Users@lists.sourceforge.net' Cc: Nishant_Galange; Apoorv_Sangal; Lochana_Lingegowda Subject: [U-Boot-Users] value of r4 in start.S in boot_cold?

Hello, I am not able to figure out the content of register r4 in the given code snippet. I also wanted to know the significance of the address 0x 0F010000 got from the line "lwz r4, 0(r3)".

boot_cold: #if defined(CONFIG_MPC8260ADS) lis r3, CFG_DEFAULT_IMMR@h nop lwz r4, 0(r3) nop rlwinm r4, r4, 0, 8, 5 nop oris r4, r4, 0x0200 nop stw r4, 0(r3) nop

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