ARM ARM DUI 0224I manual Booting from AHB expansion memory

Programmer’s Reference

Booting from AHB expansion memory

The memory maps for S1-2 ON (BOOTSEL1 HIGH) and S1-1 ON (BOOTSEL0

HIGH) are shown in Figure 4-4.

The AHB expansion memory on the RealView Logic Tile is on the AHB M2 bus.

Note

If you are booting from static memory on a RealView Logic Tile, jump to the natural address of your expansion memory before disabling DEVCHIP REMAP.

	Static		Static		Static		Static	0x3FFFFFFF
								Static CS 3
expansion		expansion		expansion		expansion
								0x3C000000
	SRAM		SRAM		SRAM		SRAM	0x3BFFFFFF
								Static CS2
								0x38000000
	NOR		NOR		NOR		NOR	0x37FFFFFF
								Static CS1
	flash 2		flash 2		flash 2		flash 2
								0x34000000
	NOR		NOR		NOR		NOR	0x33FFFFFF
								Static CS 0
	flash 1		flash 1		flash 1		flash 1	0x30000000

					0x07FFFFFF
	MPMC	MPMC	MPMC	MPMC	SDRAM CS0
	SDRAM	SDRAM	SDRAM	SDRAM
					0x04000000
		MPMC		MPMC	0x03FFFFFF
	AHB		AHB		Remapped
		SDRAM		SDRAM
	expansion		expansion		memory
		CS0		CS0
					0x0
DEVCHIP REMAP	HIGH	LOW	HIGH	LOW
FPGA_REMAP	HIGH	HIGH	LOW	LOW
	State at	SDRAM at	(not used)	Normal
	reset	0x0 visible		operation

Figure 4-4 Booting from AHB expansion

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