diff options
Diffstat (limited to 'arch/m68k/include/asm/coldfire.h')
| -rw-r--r-- | arch/m68k/include/asm/coldfire.h | 42 |
1 files changed, 19 insertions, 23 deletions
diff --git a/arch/m68k/include/asm/coldfire.h b/arch/m68k/include/asm/coldfire.h index 213028cbe11..c94557b9144 100644 --- a/arch/m68k/include/asm/coldfire.h +++ b/arch/m68k/include/asm/coldfire.h @@ -14,39 +14,35 @@ /* - * Define master clock frequency. This is essentially done at config - * time now. No point enumerating dozens of possible clock options - * here. Also the peripheral clock (bus clock) divide ratio is set - * at config time too. + * Define master clock frequency. This is done at config time now. + * No point enumerating dozens of possible clock options here. And + * in any case new boards come along from time to time that have yet + * another different clocking frequency. */ #ifdef CONFIG_CLOCK_SET #define MCF_CLK CONFIG_CLOCK_FREQ -#define MCF_BUSCLK (CONFIG_CLOCK_FREQ / CONFIG_CLOCK_DIV) #else #error "Don't know what your ColdFire CPU clock frequency is??" #endif /* - * Define the processor support peripherals base address. - * This is generally setup by the boards start up code. + * Define the processor internal peripherals base address. + * + * The majority of ColdFire parts use an MBAR register to set + * 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 CPU address space. + * + * 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. */ -#define MCF_MBAR 0x10000000 -#define MCF_MBAR2 0x80000000 -#if defined(CONFIG_M54xx) -#define MCF_IPSBAR MCF_MBAR -#elif defined(CONFIG_M520x) -#define MCF_IPSBAR 0xFC000000 -#else -#define MCF_IPSBAR 0x40000000 +#ifdef CONFIG_MBAR +#define MCF_MBAR CONFIG_MBAR #endif - -#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \ - defined(CONFIG_M520x) -#undef MCF_MBAR -#define MCF_MBAR MCF_IPSBAR -#elif defined(CONFIG_M532x) -#undef MCF_MBAR -#define MCF_MBAR 0x00000000 +#ifdef CONFIG_IPSBAR +#define MCF_IPSBAR CONFIG_IPSBAR #endif /****************************************************************************/ |