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m68knommu: make ColdFire internal peripheral region configurable

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Most ColdFire CPUs have an internal peripheral set that can be mapped at
a user selectable address. Different ColdFire parts either use an MBAR
register of an IPSBAR register to map the peripheral region. Most boards
use the Freescale default mappings - but not all.

Make the setting of the MBAR or IPSBAR register configurable. And only make
the selection available on the appropriate ColdFire CPU types.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
This commit is contained in:
Greg Ungerer
2011-03-06 21:53:28 +10:00
parent b195c47924
commit d4852a34e4
2 changed files with 49 additions and 6 deletions
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15
arch/m68k/include/asm/coldfire.h
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@@ -33,14 +33,17 @@
* the base address. Some have an IPSBAR register instead, and it
* has slightly different rules on its size and alignment. Some
* parts have fixed addresses and the internal peripherals cannot
* be relocated in the address space.
* be relocated in the CPU address space.
*
* This is generally setup by the boards start up code.
* The value of MBAR or IPSBAR is config time selectable, we no
* longer hard define it here. No MBAR or IPSBAR will be defined if
* this part has a fixed peripheral address map.
*/
#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x)
#define MCF_IPSBAR 0x40000000
#else
#define MCF_MBAR 0x10000000
#ifdef CONFIG_MBAR
#define MCF_MBAR CONFIG_MBAR
#endif
#ifdef CONFIG_IPSBAR
#define MCF_IPSBAR CONFIG_IPSBAR
#endif
/****************************************************************************/