How to get Base address/PHYS_OFFSET for specific hardware

::::Quick description:::
Search for PHYS_OFFSET  in .config if not See at kernel sources at the file: arch\arm\mach-msm\include\mach\memory.h

HTC- Buzz

/* physical offset of RAM */
#if defined(CONFIG_ARCH_QSD8X50)
#define PHYS_OFFSET        UL(0x20000000)
#elif defined(CONFIG_ARCH_MSM7225) // make sure CONFIG_ARCH_MSM7225 is set to 'y' in .config
#define PHYS_OFFSET        UL(0x02E00000)
#elif defined(CONFIG_ARCH_MSM7200A)
#define PHYS_OFFSET        UL(0x19200000)
#elif defined(CONFIG_ARCH_MSM7201A)
#define PHYS_OFFSET        UL(0x19200000)
#elif defined(CONFIG_ARCH_MSM7X00A) && defined(CONFIG_MACH_DESIREC)
#define PHYS_OFFSET        UL(0x11200000)
#elif defined(CONFIG_ARCH_MSM7X00A)
#define PHYS_OFFSET        UL(0x19200000)
#elif defined(CONFIG_ARCH_MSM7227)
#define PHYS_OFFSET        UL(0x12C00000)
#else
#define PHYS_OFFSET        UL(0x10000000)


For LG-GT540 Base address is PHYS_OFFSET  UL(0x00200000)