Add ARM946E cpu and core module targets; remap memory to 0x00000000

Patch by Peter Pearse, 2 Feb 2005

1 files changed, 66 insertions, 0 deletions

diff --git a/doc/README-integrator b/doc/README-integrator
new file mode 100644
index 0000000000..93d7688387
--- /dev/null
+++ b/doc/README-integrator
@@ -0,0 +1,66 @@
+
+		U-Boot for ARM Integrator Development Platforms
+
+			Peter Pearse, ARM Ltd.
+			peter.pearse@arm.com
+			     www.arm.com
+
+Manuals available from :-
+http://www.arm.com/products/DevTools/Hardware_Platforms.html
+
+Overview :
+--------
+There are two Integrator variants - Integrator/AP and Integrator/CP.
+Each may be fitted with a variety of core modules (CMs).
+Each CM consists of a ARM processor core and associated hardware e.g 
+	FPGA implementing various controllers and/or register
+	SSRAM
+	SDRAM
+	RAM controllers
+	clock generators etc.
+
+Boot Methods :
+------------
+Integrator platforms can be configured to use U-Boot in at least three ways :-
+a) Run ARM boot monitor, manually run U-Boot image from flash
+b) Run ARM boot monitor, automatically run U-Boot image from flash
+c) Run U-Boot image direct from flash.
+
+In cases a) and b) the ARM boot monitor will have configured the CM and mapped 
+writeable memory to 0x00000000 in the Integrator address space.
+U-Boot has to carry out minimal configration before standard code is run.
+
+In case c) it may be necessary for U-Boot to perform CM dependent initialization.
+
+Configuring U-Boot :
+------------------	
+	The makefile contains targets for Integrator platforms of both types
+fitted with all current variants of CM. If these targets are to be used with 
+boot process c) above then CONFIG_INIT_CRITICAL may need to be defined to ensure 
+that the CM is correctly configured.
+
+	There are also targets independent of CM. These may not be suitable for
+boot process c) above. They have been preserved for backward compatibility with 
+existing build processes.
+
+Code Hierarchy Applied :
+----------------------
+Code specific to initialization of a particular ARM processor has been placed in 
+cpu/arm<>/start.S so that it may be used by other boards.
+
+However, to avoid duplicating code through all processor files, a generic core 
+for ARM Integrator CMs has been added
+
+	cpu/arm_intcm
+
+Otherwise. for example,  the standard CM reset via the CM control register would
+need placing in each CM processor file......
+
+Code specific to the initialization of the CM, rather than the cpu, and initialization
+of the Integrator board itself, has been placed in 
+
+	board/integrator<>/platform.S 
+	board/integrator<>/integrator<>.c
+
+  
+