I am reading 0x40000030 to see the value of GPACR.
In the file "arch/m68knommu/platform/523x/config.c", GPACR is defined :
uint8_t *gpacr = (uint8_t *) (MCF_IPSBAR + MCF523x_GPACR);
*gpacr = 0x0C;
And "MCF523x_GPACR" is defined in file "arch/m68k/include/asm/m523xsim.h" :
#define MCF523x_GPACR (0x30)
In the file "arch/m68k/include/asm/colfire.h", I see :
#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x)
|| \
defined(CONFIG_M520x)
#undef MCF_MBAR
#define MCF_MBAR MCF_IPSBAR
And MCF523x_ETPU is define :
#define MCF523x_ETPU 0x1D0000
So I think that "MCF_MBAR + MCF523x_ETPU" = "IPSBAR + 0x1D0000" =
0x401D0000.
And the structure is defined at this adresse.
2010/12/9 Jim Donelson <ucli...@jimdonelson.com>
> Well, I'm not sure why you are reading 0x40000030, when the registers
> start at 0x401D0000.
> "MCF_MBAR + MCF523x_ETPU sounds wrong as the registers are defined to
> start at IPSBAR + 0x1D0000, so 0x401D0000 sound correct to me for the
> first register.
>
>
> On Thu, Dec 9, 2010 at 7:03 AM, Sébastien MENNETRIER
> <smennetr...@epsi.fr> wrote:
> > Hello,
> > Thanks for your help Jim.
> > The structure seem have the good alignement.
> > The structure is declaring at the adress : 0x401D0000
> > struct eTPU_struct *eTPU = (struct eTPU_struct *)0x401D0000;
> > And in the kernel code :
> > In file "./arch/m68k/include/asm/m523xsim.h" : #define MCF523x_ETPU
> > 0x1D0000
> > In the driver file "./drivers/misc/mcfetpu_serial.c", there are "MCF_MBAR
> +
> > MCF523x_ETPU" with MCF_MBAR = MCF_IPSBAR = 0x40000000
> > So it's the same adress.
> > I made a driver to see the GPACR and the PACR* :
> > uint8_t *gpacr = (uint8_t *) (0x40000030);
> > uint8_t *pacr0 = (uint8_t *) (0x40000024);
> > uint8_t *pacr1 = (uint8_t *) (0x40000025);
> > uint8_t *pacr2 = (uint8_t *) (0x40000026);
> > uint8_t *pacr3 = (uint8_t *) (0x40000027);
> > uint8_t *pacr4 = (uint8_t *) (0x40000028);
> > uint8_t *pacr5 = (uint8_t *) (0x4000002A);
> > uint8_t *pacr6 = (uint8_t *) (0x4000002B);
> > uint8_t *pacr7 = (uint8_t *) (0x4000002C);
> > uint8_t *pacr8 = (uint8_t *) (0x4000002E);
> > printk(KERN_DEBUG "GPACR : %#x", *gpacr);
> > printk(KERN_DEBUG "PACR0 : %#x", *pacr0);
> > printk(KERN_DEBUG "PACR1 : %#x", *pacr1);
> > printk(KERN_DEBUG "PACR2 : %#x", *pacr2);
> > printk(KERN_DEBUG "PACR3 : %#x", *pacr3);
> > printk(KERN_DEBUG "PACR4 : %#x", *pacr4);
> > printk(KERN_DEBUG "PACR5 : %#x", *pacr5);
> > printk(KERN_DEBUG "PACR6 : %#x", *pacr6);
> > printk(KERN_DEBUG "PACR7 : %#x", *pacr7);
> > printk(KERN_DEBUG "PACR8 : %#x", *pacr8);
> > But they are all equal at "0x00".
> > It's very strange, isn't it?
> > Are they an other security to protect the register?
> > MENNETRIER Sébastien
> > FRANCE
> >
> >
> > 2010/12/9 Jim Donelson <ucli...@jimdonelson.com>
> >>
> >> Probably has to do with structure alignment. Not sure what the packing
> >> options/pragmas are for that situation.
> >>
> >> On Thu, Dec 9, 2010 at 4:54 AM, Sébastien MENNETRIER <
> smennetr...@epsi.fr>
> >> wrote:
> >>>
> >>> Hello,
> >>> I work on a MCF5235 coldfire and with "uClinux-dist-20101026". I try to
> >>> use the eTPU.
> >>> I have install the driver and dowload the application to use eTPU on
> >>> freescale website.
> >>> When I start the programme, there are an error : "Access Error
> Exception
> >>> 12: Error on data read".
> >>> So I modify the file :
> >>> "uClinux-dist/linux-2.6.x/arch/m68knommu/platform/523x/config.c".
> >>> I have modify "*gpacr" and all "*pacrx" to obtain the access to the
> >>> register.
> >>> uint8_t *gpacr = (uint8_t *) (MCF_IPSBAR + MCF523x_GPACR);
> >>> uint8_t *pacr1 = (uint8_t *) (MCF_IPSBAR + MCF523x_PACR1);
> >>> uint8_t *pacr4 = (uint8_t *) (MCF_IPSBAR + MCF523x_PACR4);
> >>> uint8_t *pacr7 = (uint8_t *) (MCF_IPSBAR + MCF523x_PACR7);
> >>> uint8_t *pacr8 = (uint8_t *) (MCF_IPSBAR + MCF523x_PACR8);
> >>>
> >>>
> //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
> >>> // *gpacr = 0x04;
> >>> // *pacr1 = 0x40; /* EIM required for Chip Select access */
> >>> // *pacr4 = 0x40; /* I2C */
> >>> // *pacr7 = 0x44; /* INTC0 & 1 handy for debug */
> >>> // *pacr8 = 0x40; /* FEC MAC */
> >>>
> >>>
> //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
> >>> *gpacr = 0x0C;
> >>> *pacr1 = 0x44; /* EIM required for Chip Select access */
> >>> *pacr4 = 0x44; /* I2C */
> >>> *pacr7 = 0x44; /* INTC0 & 1 handy for debug */
> >>> *pacr8 = 0x44; /* FEC MAC */
> >>>
> >>> But this change did not solve the problem.
> >>> Can you help me please?
> >>>
> >>> MENNETRIER Sébastien
> >>> FRANCE
> >>> _______________________________________________
> >>> uClinux-dev mailing list
> >>> uClinux-dev@uclinux.org
> >>> http://mailman.uclinux.org/mailman/listinfo/uclinux-dev
> >>> This message was resent by uclinux-dev@uclinux.org
> >>> To unsubscribe see:
> >>> http://mailman.uclinux.org/mailman/options/uclinux-dev
> >>
> >>
> >> _______________________________________________
> >> uClinux-dev mailing list
> >> uClinux-dev@uclinux.org
> >> http://mailman.uclinux.org/mailman/listinfo/uclinux-dev
> >> This message was resent by uclinux-dev@uclinux.org
> >> To unsubscribe see:
> >> http://mailman.uclinux.org/mailman/options/uclinux-dev
> >
> >
> > _______________________________________________
> > uClinux-dev mailing list
> > uClinux-dev@uclinux.org
> > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev
> > This message was resent by uclinux-dev@uclinux.org
> > To unsubscribe see:
> > http://mailman.uclinux.org/mailman/options/uclinux-dev
> >
> _______________________________________________
> uClinux-dev mailing list
> uClinux-dev@uclinux.org
> http://mailman.uclinux.org/mailman/listinfo/uclinux-dev
> This message was resent by uclinux-dev@uclinux.org
> To unsubscribe see:
> http://mailman.uclinux.org/mailman/options/uclinux-dev
>
_______________________________________________
uClinux-dev mailing list
uClinux-dev@uclinux.org
http://mailman.uclinux.org/mailman/listinfo/uclinux-dev
This message was resent by uclinux-dev@uclinux.org
To unsubscribe see:
http://mailman.uclinux.org/mailman/options/uclinux-dev
