On Fri, Apr 27, 2012 at 3:06 PM, Greg Ungerer <g...@snapgear.com> wrote:
> Hi Luis,
>
>
> On 04/27/2012 09:08 AM, Luis Alves wrote:
>>
>> This is the first of a pack of patches to support the original 68000 cpu.
>> This adds:
>> -MC68000 cpu as a choice in the config menu.
>> -Alcetronics M68K board (uses this cpu).
>>
>> What I have changed:
>> -CONFIG_M68000 was being used by 68328 CPUs.
>> Renamed to CONFIG_M68XXX. Now the 68000 and all CPU32 CPUs use this flag
>> for common configurations.
>> -Modified all 68[VZ|EZ]328 to select CONFIG_MCPU32
>> -Modified CONFIG_MCPU32 to select CONFIG_M68XXX.
>> -Modified CONFIG_M68360 to select CONFIG_M68XXX (I think it was missing
>> some settings).
>> -Modified some files to use CONFIG_M68XXX instead of
>> CONFIG_M68000/CONFIG_MCPU32
>
>
> Thinking on this a little more, you probably don't want most of
> these changes. Certainly as Brad points out CPU32 and 68000 are
> quite different, and they need to remain as separate config options.
>
> I can see you will end up with a arch/m68k/platform/68000 with
> some new code. Is any of that common with what is currently in
> arch/m68k/platform/68328? I would expect we want to move the
> common 68000 code into that platform/68000 directory. Longer
> term we may want to do away with 68328/68EZ328/68VZ328 directories
> all together. All the code may go in a platform/68000. (Still
> thinking this one over though, but I am planning on doing away
> with the separate 5xxx ColdFire directories real soon now).
>
I think this is a good idea. Do you suggest putting all together in the
same file and use #ifdef's for cpu specific options? I could do that.
Also, how to deal with board specific configuration files?
As I referred in the previous mail, the 68000 has zero on-chip peripherals
so the initial setup and configuration is a lot 'board-dependent'.
Regards,
Luis
> Regards
> Greg
>
>
>
>
>> ---
>> arch/m68k/Kconfig.cpu | 29 ++++++++++++++++++-----------
>> arch/m68k/Kconfig.machine | 6 ++++++
>> arch/m68k/Makefile | 9 ++++++---
>> arch/m68k/include/asm/bitops.h | 2 +-
>> arch/m68k/include/asm/delay.h | 2 +-
>> arch/m68k/lib/memcpy.c | 4 ++--
>> arch/m68k/lib/memset.c | 2 +-
>> arch/m68k/lib/muldi3.c | 2 +-
>> 8 files changed, 36 insertions(+), 20 deletions(-)
>>
>> diff --git a/arch/m68k/Kconfig.cpu b/arch/m68k/Kconfig.cpu
>> index 8a9c767..2abac0f 100644
>> --- a/arch/m68k/Kconfig.cpu
>> +++ b/arch/m68k/Kconfig.cpu
>> @@ -32,26 +32,33 @@ endchoice
>>
>> if M68KCLASSIC
>>
>> -config M68000
>> +
>> +config M68XXX
>> bool
>> select CPU_HAS_NO_BITFIELDS
>> select CPU_HAS_NO_MULDIV64
>> select GENERIC_CSUM
>> help
>> - The Freescale (was Motorola) 68000 CPU is the first generation
>> of
>> - the well known M68K family of processors. The CPU core as well
>> as
>> - being available as a stand alone CPU was also used in many
>> - System-On-Chip devices (eg 68328, 68302, etc). It does not
>> contain
>> - a paging MMU.
>> + Common features for the first generation of M68K CPUs. It
>> + includes the original MC68000 and CPU32 core.
>> +
>>
>> config MCPU32
>> bool
>> - select CPU_HAS_NO_BITFIELDS
>> + select M68XXX
>> help
>> The Freescale (was then Motorola) CPU32 is a CPU core that is
>> based on the 68020 processor. For the most part it is used in
>> System-On-Chip parts, and does not contain a paging MMU.
>>
>> +config M68000
>> + bool "MC68000"
>> + select M68XXX
>> + help
>> + The Freescale (was Motorola) 68000 CPU is the first generation
>> of
>> + the well known M68K family of processors. It does not contain
>> + a paging MMU.
>> +
>> config M68020
>> bool "68020 support"
>> depends on MMU
>> @@ -96,28 +103,28 @@ config M68060
>> config M68328
>> bool "MC68328"
>> depends on !MMU
>> - select M68000
>> + select MCPU32
>> help
>> Motorola 68328 processor support.
>>
>> config M68EZ328
>> bool "MC68EZ328"
>> depends on !MMU
>> - select M68000
>> + select MCPU32
>> help
>> Motorola 68EX328 processor support.
>>
>> config M68VZ328
>> bool "MC68VZ328"
>> depends on !MMU
>> - select M68000
>> + select MCPU32
>> help
>> Motorola 68VZ328 processor support.
>>
>> config M68360
>> bool "MC68360"
>> depends on !MMU
>> - select MCPU32
>> + select M68XXX
>> help
>> Motorola 68360 processor support.
>>
>> diff --git a/arch/m68k/Kconfig.machine b/arch/m68k/Kconfig.machine
>> index 7cdf6b0..25ce143 100644
>> --- a/arch/m68k/Kconfig.machine
>> +++ b/arch/m68k/Kconfig.machine
>> @@ -134,6 +134,12 @@ config SUN3
>>
>> endif # M68KCLASSIC
>>
>> +config ALCE68K
>> + bool "Alcetronics M68K board support"
>> + depends on M68000
>> + help
>> + Support for the Alcetronics M68K board.
>> +
>> config PILOT
>> bool
>>
>> diff --git a/arch/m68k/Makefile b/arch/m68k/Makefile
>> index cf318f2..d1d7343 100644
>> --- a/arch/m68k/Makefile
>> +++ b/arch/m68k/Makefile
>> @@ -32,8 +32,9 @@ cpuflags-$(CONFIG_M68040) := -m68040
>> endif
>> cpuflags-$(CONFIG_M68030) :=
>> cpuflags-$(CONFIG_M68020) :=
>> -cpuflags-$(CONFIG_M68360) := -m68332
>> cpuflags-$(CONFIG_M68000) := -m68000
>> +cpuflags-$(CONFIG_MCPU32) := -m68000
>> +cpuflags-$(CONFIG_M68360) := -m68332
>> cpuflags-$(CONFIG_M54xx) := $(call cc-option,-mcpu=5475,-m5200)
>> cpuflags-$(CONFIG_M5407) := $(call cc-option,-mcpu=5407,-m5200)
>> cpuflags-$(CONFIG_M532x) := $(call cc-option,-mcpu=532x,-m5307)
>> @@ -88,8 +89,9 @@ endif
>> #
>> head-y := arch/m68k/kernel/head.o
>> head-$(CONFIG_SUN3) := arch/m68k/kernel/sun3-head.o
>> +head-$(CONFIG_M68000) := arch/m68k/platform/68000/head.o
>> head-$(CONFIG_M68360) := arch/m68k/platform/68360/head.o
>> -head-$(CONFIG_M68000) := arch/m68k/platform/68328/head.o
>> +head-$(CONFIG_MCPU32) := arch/m68k/platform/68328/head.o
>> head-$(CONFIG_COLDFIRE) :=
>> arch/m68k/platform/coldfire/head.o
>>
>> core-y += arch/m68k/kernel/
>> arch/m68k/mm/
>> @@ -111,7 +113,8 @@ core-$(CONFIG_M68040) +=
>> arch/m68k/fpsp040/
>> core-$(CONFIG_M68060) += arch/m68k/ifpsp060/
>> core-$(CONFIG_M68KFPU_EMU) += arch/m68k/math-emu/
>> core-$(CONFIG_M68360) += arch/m68k/platform/68360/
>> -core-$(CONFIG_M68000) += arch/m68k/platform/68328/
>> +core-$(CONFIG_M68000) += arch/m68k/platform/68000/
>> +core-$(CONFIG_MCPU32) += arch/m68k/platform/68328/
>> core-$(CONFIG_M68EZ328) += arch/m68k/platform/68EZ328/
>> core-$(CONFIG_M68VZ328) += arch/m68k/platform/68VZ328/
>> core-$(CONFIG_COLDFIRE) += arch/m68k/platform/coldfire/
>> diff --git a/arch/m68k/include/asm/bitops.h
>> b/arch/m68k/include/asm/bitops.h
>> index c6baa91..93b944d 100644
>> --- a/arch/m68k/include/asm/bitops.h
>> +++ b/arch/m68k/include/asm/bitops.h
>> @@ -457,7 +457,7 @@ static inline unsigned long ffz(unsigned long word)
>> * generic functions for those.
>> */
>> #if (defined(__mcfisaaplus__) || defined(__mcfisac__))&& \
>> - !defined(CONFIG_M68000)&& !defined(CONFIG_MCPU32)
>>
>> + !defined(CONFIG_M68XXX)
>> static inline int __ffs(int x)
>> {
>> __asm__ __volatile__ ("bitrev %0; ff1 %0"
>> diff --git a/arch/m68k/include/asm/delay.h b/arch/m68k/include/asm/delay.h
>> index 9c09bec..8e58c2a 100644
>> --- a/arch/m68k/include/asm/delay.h
>> +++ b/arch/m68k/include/asm/delay.h
>> @@ -43,7 +43,7 @@ static inline void __delay(unsigned long loops)
>> extern void __bad_udelay(void);
>>
>>
>> -#if defined(CONFIG_M68000) || defined(CONFIG_COLDFIRE)
>> +#if defined(CONFIG_M68XXX) || defined(CONFIG_COLDFIRE)
>> /*
>> * The simpler m68k and ColdFire processors do not have a 32*32->64
>> * multiply instruction. So we need to handle them a little differently.
>> diff --git a/arch/m68k/lib/memcpy.c b/arch/m68k/lib/memcpy.c
>> index 10ca051..c0a1ae8 100644
>> --- a/arch/m68k/lib/memcpy.c
>> +++ b/arch/m68k/lib/memcpy.c
>> @@ -22,7 +22,7 @@ void *memcpy(void *to, const void *from, size_t n)
>> from = cfrom;
>> n--;
>> }
>> -#if defined(CONFIG_M68000)
>> +#if defined(CONFIG_M68XXX)
>> if ((long)from& 1) {
>>
>> char *cto = to;
>> const char *cfrom = from;
>> @@ -43,7 +43,7 @@ void *memcpy(void *to, const void *from, size_t n)
>> if (temp) {
>> long *lto = to;
>> const long *lfrom = from;
>> -#if defined(CONFIG_M68000) || defined(CONFIG_COLDFIRE)
>> +#if defined(CONFIG_M68XXX) || defined(CONFIG_COLDFIRE)
>> for (; temp; temp--)
>> *lto++ = *lfrom++;
>> #else
>> diff --git a/arch/m68k/lib/memset.c b/arch/m68k/lib/memset.c
>> index 8a7639f..6196f39 100644
>> --- a/arch/m68k/lib/memset.c
>> +++ b/arch/m68k/lib/memset.c
>> @@ -32,7 +32,7 @@ void *memset(void *s, int c, size_t count)
>> temp = count>> 2;
>> if (temp) {
>> long *ls = s;
>> -#if defined(CONFIG_M68000) || defined(CONFIG_COLDFIRE)
>> +#if defined(CONFIG_M68XXX) || defined(CONFIG_COLDFIRE)
>> for (; temp; temp--)
>> *ls++ = c;
>> #else
>> diff --git a/arch/m68k/lib/muldi3.c b/arch/m68k/lib/muldi3.c
>> index 79e928a..1cd9ba4 100644
>> --- a/arch/m68k/lib/muldi3.c
>> +++ b/arch/m68k/lib/muldi3.c
>> @@ -19,7 +19,7 @@ along with GNU CC; see the file COPYING. If not, write
>> to
>> the Free Software Foundation, 59 Temple Place - Suite 330,
>> Boston, MA 02111-1307, USA. */
>>
>> -#if defined(CONFIG_M68000) || defined(CONFIG_COLDFIRE)
>> +#if defined(CONFIG_M68XXX) || defined(CONFIG_COLDFIRE)
>>
>> #define SI_TYPE_SIZE 32
>> #define __BITS4 (SI_TYPE_SIZE / 4)
>
>
>
> --
> ------------------------------------------------------------------------
> Greg Ungerer -- Principal Engineer EMAIL: g...@snapgear.com
> SnapGear Group, McAfee PHONE: +61 7 3435 2888
> 8 Gardner Close, FAX: +61 7 3891 3630
>
> Milton, QLD, 4064, Australia WEB: http://www.SnapGear.com
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