d4852a34e4
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>
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/****************************************************************************/
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/*
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* coldfire.h -- Motorola ColdFire CPU sepecific defines
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*
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* (C) Copyright 1999-2006, Greg Ungerer (gerg@snapgear.com)
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* (C) Copyright 2000, Lineo (www.lineo.com)
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*/
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/****************************************************************************/
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#ifndef coldfire_h
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#define coldfire_h
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/****************************************************************************/
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/*
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* Define master clock frequency. This is essentially done at config
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* time now. No point enumerating dozens of possible clock options
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* here. Also the peripheral clock (bus clock) divide ratio is set
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* at config time too.
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*/
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#ifdef CONFIG_CLOCK_SET
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#define MCF_CLK CONFIG_CLOCK_FREQ
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#define MCF_BUSCLK (CONFIG_CLOCK_FREQ / CONFIG_CLOCK_DIV)
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#else
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#error "Don't know what your ColdFire CPU clock frequency is??"
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#endif
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/*
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* Define the processor internal peripherals base address.
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*
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* The majority of ColdFire parts use an MBAR register to set
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* the base address. Some have an IPSBAR register instead, and it
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* has slightly different rules on its size and alignment. Some
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* parts have fixed addresses and the internal peripherals cannot
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* be relocated in the CPU address space.
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*
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* The value of MBAR or IPSBAR is config time selectable, we no
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* longer hard define it here. No MBAR or IPSBAR will be defined if
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* this part has a fixed peripheral address map.
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*/
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#ifdef CONFIG_MBAR
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#define MCF_MBAR CONFIG_MBAR
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#endif
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#ifdef CONFIG_IPSBAR
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#define MCF_IPSBAR CONFIG_IPSBAR
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#endif
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/****************************************************************************/
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#endif /* coldfire_h */
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