[PATCH] m68knommu: create configurable RAM setup

[pandora-kernel.git] / arch / m68knommu / Kconfig

diff --git a/arch/m68knommu/Kconfig b/arch/m68knommu/Kconfig
index 6c6980b..8b6e723 100644 (file)
--- a/arch/m68knommu/Kconfig
+++ b/arch/m68knommu/Kconfig
@@ -472,38 +472,46 @@ config 4KSTACKS
          running more threads on a system and also reduces the pressure
          on the VM subsystem for higher order allocations.
 
-choice
-       prompt "RAM size"
-       default AUTO
-
-config RAMAUTO
-       bool "AUTO"
-       ---help---
-         Configure the RAM size on your platform. Many platforms can auto
-         detect this, on those choose the AUTO option. Otherwise set the
-         RAM size you intend using.
-
-config RAM4MB
-       bool "4MiB"
-       help
-         Set RAM size to be 4MiB.
-
-config RAM8MB
-       bool "8MiB"
-       help
-         Set RAM size to be 8MiB.
-
-config RAM16MB
-       bool "16MiB"
-       help
-         Set RAM size to be 16MiB.
-
-config RAM32MB
-       bool "32MiB"
-       help
-         Set RAM size to be 32MiB.
-
-endchoice
+comment "RAM configuration"
+
+config RAMBASE
+       hex "Address of the base of RAM"
+       default "0"
+       help
+         Define the address that RAM starts at. On many platforms this is
+         0, the base of the address space. And this is the default. Some
+         platforms choose to setup their RAM at other addresses within the
+         processor address space.
+
+config RAMSIZE
+       hex "Size of RAM (in bytes)"
+       default "0x400000"
+       help
+         Define the size of the system RAM. If you select 0 then the
+         kernel will try to probe the RAM size at runtime. This is not
+         supported on all CPU types.
+
+config VECTORBASE
+       hex "Address of the base of system vectors"
+       default "0"
+       help
+         Define the address of the the system vectors. Commonly this is
+         put at the start of RAM, but it doesn't have to be. On ColdFire
+         platforms this address is programmed into the VBR register, thus
+         actually setting the address to use.
+
+config KERNELBASE
+       hex "Address of the base of kernel code"
+       default "0x400"
+       help
+         Typically on m68k systems the kernel will not start at the base
+         of RAM, but usually some small offset from it. Define the start
+         address of the kernel here. The most common setup will have the
+         processor vectors at the base of RAM and then the start of the
+         kernel. On some platforms some RAM is reserved for boot loaders
+         and the kernel starts after that. The 0x400 default was based on
+         a system with the RAM based at address 0, and leaving enough room
+         for the theoretical maximum number of 256 vectors.
 
 choice
        prompt "RAM bus width"
@@ -511,7 +519,7 @@ choice
 
 config RAMAUTOBIT
        bool "AUTO"
-       ---help---
+       help
          Select the physical RAM data bus size. Not needed on most platforms,
          so you can generally choose AUTO.
 
@@ -545,7 +553,9 @@ config RAMKERNEL
 config ROMKERNEL
        bool "ROM"
        help
-         The kernel will be resident in FLASH/ROM when running.
+         The kernel will be resident in FLASH/ROM when running. This is
+         often referred to as Execute-in-Place (XIP), since the kernel
+         code executes from the position it is stored in the FLASH/ROM.
 
 endchoice