Patchwork [U-Boot,2/6] nand: Add SPL_NAND support to mxc_nand_spl

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Submitter Benoît Thébaudeau
Date April 19, 2013, 1:46 p.m.
Message ID <1875642661.1878154.1366379203443.JavaMail.root@advansee.com>
Download mbox | patch
Permalink /patch/237956/
State Not Applicable
Delegated to: Stefano Babic
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Comments

Benoît Thébaudeau - April 19, 2013, 1:46 p.m.
Dear Marek Vasut,

On Friday, April 19, 2013 1:55:31 PM, Benoît Thébaudeau wrote:
> Dear Marek Vasut,
> 
> On Friday, April 19, 2013 1:14:16 PM, Marek Vasut wrote:
> > Dear Benoît Thébaudeau,
> > 
> > > On Friday, April 19, 2013 10:38:48 AM, Benoît Thébaudeau wrote:
> > > > Dear Marek Vasut,
> > > > 
> > > > On Friday, April 19, 2013 6:10:51 AM, Marek Vasut wrote:
> > > > > Add support for generic NAND SPL via the SPL framework into the
> > > > > mxc_nand_spl driver. This is basically just a simple rename and
> > > > > publication of the already implemented functions. To avoid the
> > > > > old function which are used with the nand_spl/ stuff getting in
> > > > > the way of NAND SPL framework, the macro CONFIG_SPL_NAND_LEGACY
> > > > > was introduced and two remaining legacy boards were adjusted.
> > > > > These board need to be either fixed or removed in the long run,
> > > > > but I don't have either.
> > > > > 
> > > > > Also make sure the requested payload is aligned to full pages,
> > > > > otherwise this simple driver fails to load the last page.
> > > > > 
> > > > > Signed-off-by: Marek Vasut <marex@denx.de>
> > > > > Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
> > > > > Cc: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
> > > > > Cc: Fabio Estevam <fabio.estevam@freescale.com>
> > > > > Cc: Scott Wood <scottwood@freescale.com>
> > > > > Cc: Stefano Babic <sbabic@denx.de>
> > > > > Cc: Tom Rini <trini@ti.com>
> > > > > ---
> > > > > 
> > > > >  drivers/mtd/nand/mxc_nand_spl.c | 13 ++++++++++---
> > > > >  include/configs/mx31pdk.h       |  1 +
> > > > >  include/configs/tx25.h          |  1 +
> > > > >  3 files changed, 12 insertions(+), 3 deletions(-)
> > > > > 
> > > > > diff --git a/drivers/mtd/nand/mxc_nand_spl.c
> > > > > b/drivers/mtd/nand/mxc_nand_spl.c
> > > > > index 09f23c3..8ff03c9 100644
> > > > > --- a/drivers/mtd/nand/mxc_nand_spl.c
> > > > > +++ b/drivers/mtd/nand/mxc_nand_spl.c
> > > > > @@ -290,7 +290,7 @@ static int is_badblock(int pagenumber)
> > > > > 
> > > > >  	return 0;
> > > > >  
> > > > >  }
> > > > > 
> > > > > -static int nand_load(unsigned int from, unsigned int size, unsigned
> > > > > char *buf)
> > > > > +int nand_spl_load_image(uint32_t from, unsigned int size, void *buf)
> > > > > 
> > > > >  {
> > > > >  
> > > > >  	int i;
> > > > >  	unsigned int page;
> > > > > 
> > > > > @@ -303,6 +303,7 @@ static int nand_load(unsigned int from, unsigned
> > > > > int size, unsigned char *buf)
> > > > > 
> > > > >  	page = from / CONFIG_SYS_NAND_PAGE_SIZE;
> > > > >  	i = 0;
> > > > > 
> > > > > +	size = roundup(size, CONFIG_SYS_NAND_PAGE_SIZE);
> > > > > 
> > > > >  	while (i < size / CONFIG_SYS_NAND_PAGE_SIZE) {
> > > > >  	
> > > > >  		if (nfc_read_page(page, buf) < 0)
> > > > >  		
> > > > >  			return -1;
> > > > > 
> > > > > @@ -332,6 +333,7 @@ static int nand_load(unsigned int from, unsigned
> > > > > int size, unsigned char *buf)
> > > > > 
> > > > >  	return 0;
> > > > >  
> > > > >  }
> > > > > 
> > > > > +#ifdef CONFIG_SPL_NAND_SUPPORT_LEGACY
> > > > > 
> > > > >  /*
> > > > >  
> > > > >   * The main entry for NAND booting. It's necessary that SDRAM is
> > > > >   already * configured and available since this code loads the main
> > > > >   U-Boot image
> > > > > 
> > > > > @@ -345,8 +347,9 @@ void nand_boot(void)
> > > > > 
> > > > >  	 * CONFIG_SYS_NAND_U_BOOT_OFFS and CONFIG_SYS_NAND_U_BOOT_SIZE must
> > > > >  	 * be aligned to full pages
> > > > >  	 */
> > > > > 
> > > > > -	if (!nand_load(CONFIG_SYS_NAND_U_BOOT_OFFS,
> > > > > CONFIG_SYS_NAND_U_BOOT_SIZE, -		       (uchar
> > > > > *)CONFIG_SYS_NAND_U_BOOT_DST)) {
> > > > > +	if (!nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
> > > > > +			CONFIG_SYS_NAND_U_BOOT_SIZE,
> > > > > +			(uchar *)CONFIG_SYS_NAND_U_BOOT_DST)) {
> > > > > 
> > > > >  		/* Copy from NAND successful, start U-boot */
> > > > >  		uboot = (void *)CONFIG_SYS_NAND_U_BOOT_START;
> > > > >  		uboot();
> > > > > 
> > > > > @@ -364,3 +367,7 @@ void hang(void)
> > > > > 
> > > > >  	/* Loop forever */
> > > > >  	while (1) ;
> > > > >  
> > > > >  }
> > > > > 
> > > > > +#endif
> > > > > +
> > > > > +void nand_init(void) {}
> > > > > +void nand_deselect(void) {}
> > > > > diff --git a/include/configs/mx31pdk.h b/include/configs/mx31pdk.h
> > > > > index 1754595..217552e 100644
> > > > > --- a/include/configs/mx31pdk.h
> > > > > +++ b/include/configs/mx31pdk.h
> > > > > @@ -50,6 +50,7 @@
> > > > > 
> > > > >  #define CONFIG_SPL_LDSCRIPT	"arch/$(ARCH)/cpu/u-boot-spl.lds"
> > > > >  #define CONFIG_SPL_MAX_SIZE	2048
> > > > >  #define CONFIG_SPL_NAND_SUPPORT
> > > > > 
> > > > > +#define CONFIG_SPL_NAND_SUPPORT_LEGACY
> > > > > 
> > > > >  #define CONFIG_SPL_TEXT_BASE	0x87dc0000
> > > > >  #define CONFIG_SYS_TEXT_BASE	0x87e00000
> > > > > 
> > > > > diff --git a/include/configs/tx25.h b/include/configs/tx25.h
> > > > > index e72f8f6..7c362d0 100644
> > > > > --- a/include/configs/tx25.h
> > > > > +++ b/include/configs/tx25.h
> > > > > @@ -37,6 +37,7 @@
> > > > > 
> > > > >  #define CONFIG_SPL_LDSCRIPT		"arch/$(ARCH)/cpu/u-boot-
> > spl.lds"
> > > > >  #define CONFIG_SPL_MAX_SIZE		2048
> > > > >  #define CONFIG_SPL_NAND_SUPPORT
> > > > > 
> > > > > +#define CONFIG_SPL_NAND_SUPPORT_LEGACY
> > > > > 
> > > > >  #define CONFIG_SPL_TEXT_BASE		0x810c0000
> > > > >  #define CONFIG_SYS_TEXT_BASE		0x81200000
> > > > > 
> > > > > --
> > > > > 1.7.11.7
> > > > 
> > > > This is not about legacy vs. non-legacy. This is about basic vs. more
> > > > featured
> > > > SPL because of SPL size constraints. So what about dropping
> > > > CONFIG_SPL_NAND_SUPPORT_LEGACY and testing for CONFIG_SPL_FRAMEWORK
> > > > definition
> > > > instead?
> > 
> > I was thinking about that, but the symbol is unrelated to NAND.
> 
> Well, it's CONFIG_SPL_FRAMEWORK + CONFIG_SPL_NAND_SUPPORT that defines the
> other
> implementation, and CONFIG_SPL_NAND_SUPPORT triggers the build of
> mxc_nand_spl.c
> for SPL, so the common point is CONFIG_SPL_FRAMEWORK.
> 
> > I still think
> > it's either a matter of fixing for new SPL or removing those two boards.
> > The
> > nand_spl/ stuff shall be removed ASAP.
> 
> Removing those boards is not a solution.
> 
> Is it really about "new" SPL? The generic SPL is enabled by CONFIG_SPL, and
> CONFIG_SPL_FRAMEWORK is a sub-option. If the generic SPL rules imposed to use
> the SPL framework functions, there would be no such sub-option. So it looks
> like
> these boards are complying to the new SPL rules.
> 
> We could see if using CONFIG_SPL_FRAMEWORK would still allow the SPL to fit
> in
> 2 kiB in order to drop this function, but if it does not fit, the new SPL
> rules
> should still make it possible to have a solution for any board having SPL
> size
> constraints.

I've just quickly build-tested the hack-patch below to have a guess of the SPL
size for mx31pdk with CONFIG_SPL_FRAMEWORK, and I get 3.9 kiB, so way more than
the maximum 2 kiB. Hence, these boards can't unfortunately be made more generic,
but it's not a reason to remove them. The generic SPL must allow such hardware
to be supported by U-Boot.

> > > Also, I don't see any nand_init() (called by spl_nand_load_image()) for
> > > m53evk.
> > 
> > What do you mean?
> 
> I mean that I don't identify the implementation of nand_init() used in the
> context of the m53evk since the builds of drivers/mtd/nand/nand.c and
> drivers/mtd/nand/nand_spl_simple.c do not seem to be enabled for this board,
> and
> I don't see another definition.

Forget that. I had just missed its definition in this patch. I saw it thanks to
Philip.

Best regards,
Benoît

---
Marek Vasut - April 19, 2013, 5:08 p.m.
Dear Benoît Thébaudeau,

> Dear Marek Vasut,
> 
> On Friday, April 19, 2013 1:55:31 PM, Benoît Thébaudeau wrote:
> > Dear Marek Vasut,
> > 
> > On Friday, April 19, 2013 1:14:16 PM, Marek Vasut wrote:
> > > Dear Benoît Thébaudeau,
> > > 
> > > > On Friday, April 19, 2013 10:38:48 AM, Benoît Thébaudeau wrote:
> > > > > Dear Marek Vasut,
> > > > > 
> > > > > On Friday, April 19, 2013 6:10:51 AM, Marek Vasut wrote:
> > > > > > Add support for generic NAND SPL via the SPL framework into the
> > > > > > mxc_nand_spl driver. This is basically just a simple rename and
> > > > > > publication of the already implemented functions. To avoid the
> > > > > > old function which are used with the nand_spl/ stuff getting in
> > > > > > the way of NAND SPL framework, the macro CONFIG_SPL_NAND_LEGACY
> > > > > > was introduced and two remaining legacy boards were adjusted.
> > > > > > These board need to be either fixed or removed in the long run,
> > > > > > but I don't have either.
> > > > > > 
> > > > > > Also make sure the requested payload is aligned to full pages,
> > > > > > otherwise this simple driver fails to load the last page.
> > > > > > 
> > > > > > Signed-off-by: Marek Vasut <marex@denx.de>
> > > > > > Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
> > > > > > Cc: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
> > > > > > Cc: Fabio Estevam <fabio.estevam@freescale.com>
> > > > > > Cc: Scott Wood <scottwood@freescale.com>
> > > > > > Cc: Stefano Babic <sbabic@denx.de>
> > > > > > Cc: Tom Rini <trini@ti.com>
> > > > > > ---
> > > > > > 
> > > > > >  drivers/mtd/nand/mxc_nand_spl.c | 13 ++++++++++---
> > > > > >  include/configs/mx31pdk.h       |  1 +
> > > > > >  include/configs/tx25.h          |  1 +
> > > > > >  3 files changed, 12 insertions(+), 3 deletions(-)
> > > > > > 
> > > > > > diff --git a/drivers/mtd/nand/mxc_nand_spl.c
> > > > > > b/drivers/mtd/nand/mxc_nand_spl.c
> > > > > > index 09f23c3..8ff03c9 100644
> > > > > > --- a/drivers/mtd/nand/mxc_nand_spl.c
> > > > > > +++ b/drivers/mtd/nand/mxc_nand_spl.c
> > > > > > @@ -290,7 +290,7 @@ static int is_badblock(int pagenumber)
> > > > > > 
> > > > > >  	return 0;
> > > > > >  
> > > > > >  }
> > > > > > 
> > > > > > -static int nand_load(unsigned int from, unsigned int size,
> > > > > > unsigned char *buf)
> > > > > > +int nand_spl_load_image(uint32_t from, unsigned int size, void
> > > > > > *buf)
> > > > > > 
> > > > > >  {
> > > > > >  
> > > > > >  	int i;
> > > > > >  	unsigned int page;
> > > > > > 
> > > > > > @@ -303,6 +303,7 @@ static int nand_load(unsigned int from,
> > > > > > unsigned int size, unsigned char *buf)
> > > > > > 
> > > > > >  	page = from / CONFIG_SYS_NAND_PAGE_SIZE;
> > > > > >  	i = 0;
> > > > > > 
> > > > > > +	size = roundup(size, CONFIG_SYS_NAND_PAGE_SIZE);
> > > > > > 
> > > > > >  	while (i < size / CONFIG_SYS_NAND_PAGE_SIZE) {
> > > > > >  	
> > > > > >  		if (nfc_read_page(page, buf) < 0)
> > > > > >  		
> > > > > >  			return -1;
> > > > > > 
> > > > > > @@ -332,6 +333,7 @@ static int nand_load(unsigned int from,
> > > > > > unsigned int size, unsigned char *buf)
> > > > > > 
> > > > > >  	return 0;
> > > > > >  
> > > > > >  }
> > > > > > 
> > > > > > +#ifdef CONFIG_SPL_NAND_SUPPORT_LEGACY
> > > > > > 
> > > > > >  /*
> > > > > >  
> > > > > >   * The main entry for NAND booting. It's necessary that SDRAM is
> > > > > >   already * configured and available since this code loads the
> > > > > >   main U-Boot image
> > > > > > 
> > > > > > @@ -345,8 +347,9 @@ void nand_boot(void)
> > > > > > 
> > > > > >  	 * CONFIG_SYS_NAND_U_BOOT_OFFS and CONFIG_SYS_NAND_U_BOOT_SIZE
> > > > > >  	 must * be aligned to full pages
> > > > > >  	 */
> > > > > > 
> > > > > > -	if (!nand_load(CONFIG_SYS_NAND_U_BOOT_OFFS,
> > > > > > CONFIG_SYS_NAND_U_BOOT_SIZE, -		       (uchar
> > > > > > *)CONFIG_SYS_NAND_U_BOOT_DST)) {
> > > > > > +	if (!nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
> > > > > > +			CONFIG_SYS_NAND_U_BOOT_SIZE,
> > > > > > +			(uchar *)CONFIG_SYS_NAND_U_BOOT_DST)) {
> > > > > > 
> > > > > >  		/* Copy from NAND successful, start U-boot */
> > > > > >  		uboot = (void *)CONFIG_SYS_NAND_U_BOOT_START;
> > > > > >  		uboot();
> > > > > > 
> > > > > > @@ -364,3 +367,7 @@ void hang(void)
> > > > > > 
> > > > > >  	/* Loop forever */
> > > > > >  	while (1) ;
> > > > > >  
> > > > > >  }
> > > > > > 
> > > > > > +#endif
> > > > > > +
> > > > > > +void nand_init(void) {}
> > > > > > +void nand_deselect(void) {}
> > > > > > diff --git a/include/configs/mx31pdk.h
> > > > > > b/include/configs/mx31pdk.h index 1754595..217552e 100644
> > > > > > --- a/include/configs/mx31pdk.h
> > > > > > +++ b/include/configs/mx31pdk.h
> > > > > > @@ -50,6 +50,7 @@
> > > > > > 
> > > > > >  #define CONFIG_SPL_LDSCRIPT	"arch/$(ARCH)/cpu/u-boot-
spl.lds"
> > > > > >  #define CONFIG_SPL_MAX_SIZE	2048
> > > > > >  #define CONFIG_SPL_NAND_SUPPORT
> > > > > > 
> > > > > > +#define CONFIG_SPL_NAND_SUPPORT_LEGACY
> > > > > > 
> > > > > >  #define CONFIG_SPL_TEXT_BASE	0x87dc0000
> > > > > >  #define CONFIG_SYS_TEXT_BASE	0x87e00000
> > > > > > 
> > > > > > diff --git a/include/configs/tx25.h b/include/configs/tx25.h
> > > > > > index e72f8f6..7c362d0 100644
> > > > > > --- a/include/configs/tx25.h
> > > > > > +++ b/include/configs/tx25.h
> > > > > > @@ -37,6 +37,7 @@
> > > > > > 
> > > > > >  #define CONFIG_SPL_LDSCRIPT		"arch/$(ARCH)/cpu/u-
boot-
> > > 
> > > spl.lds"
> > > 
> > > > > >  #define CONFIG_SPL_MAX_SIZE		2048
> > > > > >  #define CONFIG_SPL_NAND_SUPPORT
> > > > > > 
> > > > > > +#define CONFIG_SPL_NAND_SUPPORT_LEGACY
> > > > > > 
> > > > > >  #define CONFIG_SPL_TEXT_BASE		0x810c0000
> > > > > >  #define CONFIG_SYS_TEXT_BASE		0x81200000
> > > > > > 
> > > > > > --
> > > > > > 1.7.11.7
> > > > > 
> > > > > This is not about legacy vs. non-legacy. This is about basic vs.
> > > > > more featured
> > > > > SPL because of SPL size constraints. So what about dropping
> > > > > CONFIG_SPL_NAND_SUPPORT_LEGACY and testing for CONFIG_SPL_FRAMEWORK
> > > > > definition
> > > > > instead?
> > > 
> > > I was thinking about that, but the symbol is unrelated to NAND.
> > 
> > Well, it's CONFIG_SPL_FRAMEWORK + CONFIG_SPL_NAND_SUPPORT that defines
> > the other
> > implementation, and CONFIG_SPL_NAND_SUPPORT triggers the build of
> > mxc_nand_spl.c
> > for SPL, so the common point is CONFIG_SPL_FRAMEWORK.
> > 
> > > I still think
> > > it's either a matter of fixing for new SPL or removing those two
> > > boards. The
> > > nand_spl/ stuff shall be removed ASAP.
> > 
> > Removing those boards is not a solution.
> > 
> > Is it really about "new" SPL? The generic SPL is enabled by CONFIG_SPL,
> > and CONFIG_SPL_FRAMEWORK is a sub-option. If the generic SPL rules
> > imposed to use the SPL framework functions, there would be no such
> > sub-option. So it looks like
> > these boards are complying to the new SPL rules.
> > 
> > We could see if using CONFIG_SPL_FRAMEWORK would still allow the SPL to
> > fit in
> > 2 kiB in order to drop this function, but if it does not fit, the new SPL
> > rules
> > should still make it possible to have a solution for any board having SPL
> > size
> > constraints.
> 
> I've just quickly build-tested the hack-patch below to have a guess of the
> SPL size for mx31pdk with CONFIG_SPL_FRAMEWORK, and I get 3.9 kiB, so way
> more than the maximum 2 kiB. Hence, these boards can't unfortunately be
> made more generic, but it's not a reason to remove them. The generic SPL
> must allow such hardware to be supported by U-Boot.

See the other email for my other idea. Either we can go with that or I can focus 
on making use of the regular MXC NAND driver on mx5, since there's no 2KiB limit 
there.
[...]
Benoît Thébaudeau - April 20, 2013, 1 p.m.
Dear Marek Vasut,

On Friday, April 19, 2013 7:08:06 PM, Marek Vasut wrote:
> Dear Benoît Thébaudeau,
> 
> > Dear Marek Vasut,
> > 
> > On Friday, April 19, 2013 1:55:31 PM, Benoît Thébaudeau wrote:
> > > Dear Marek Vasut,
> > > 
> > > On Friday, April 19, 2013 1:14:16 PM, Marek Vasut wrote:
> > > > Dear Benoît Thébaudeau,
> > > > 
> > > > > On Friday, April 19, 2013 10:38:48 AM, Benoît Thébaudeau wrote:
> > > > > > Dear Marek Vasut,
> > > > > > 
> > > > > > On Friday, April 19, 2013 6:10:51 AM, Marek Vasut wrote:
> > > > > > > Add support for generic NAND SPL via the SPL framework into the
> > > > > > > mxc_nand_spl driver. This is basically just a simple rename and
> > > > > > > publication of the already implemented functions. To avoid the
> > > > > > > old function which are used with the nand_spl/ stuff getting in
> > > > > > > the way of NAND SPL framework, the macro CONFIG_SPL_NAND_LEGACY
> > > > > > > was introduced and two remaining legacy boards were adjusted.
> > > > > > > These board need to be either fixed or removed in the long run,
> > > > > > > but I don't have either.
> > > > > > > 
> > > > > > > Also make sure the requested payload is aligned to full pages,
> > > > > > > otherwise this simple driver fails to load the last page.
> > > > > > > 
> > > > > > > Signed-off-by: Marek Vasut <marex@denx.de>
> > > > > > > Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
> > > > > > > Cc: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
> > > > > > > Cc: Fabio Estevam <fabio.estevam@freescale.com>
> > > > > > > Cc: Scott Wood <scottwood@freescale.com>
> > > > > > > Cc: Stefano Babic <sbabic@denx.de>
> > > > > > > Cc: Tom Rini <trini@ti.com>
> > > > > > > ---
> > > > > > > 
> > > > > > >  drivers/mtd/nand/mxc_nand_spl.c | 13 ++++++++++---
> > > > > > >  include/configs/mx31pdk.h       |  1 +
> > > > > > >  include/configs/tx25.h          |  1 +
> > > > > > >  3 files changed, 12 insertions(+), 3 deletions(-)
> > > > > > > 
> > > > > > > diff --git a/drivers/mtd/nand/mxc_nand_spl.c
> > > > > > > b/drivers/mtd/nand/mxc_nand_spl.c
> > > > > > > index 09f23c3..8ff03c9 100644
> > > > > > > --- a/drivers/mtd/nand/mxc_nand_spl.c
> > > > > > > +++ b/drivers/mtd/nand/mxc_nand_spl.c
> > > > > > > @@ -290,7 +290,7 @@ static int is_badblock(int pagenumber)
> > > > > > > 
> > > > > > >  	return 0;
> > > > > > >  
> > > > > > >  }
> > > > > > > 
> > > > > > > -static int nand_load(unsigned int from, unsigned int size,
> > > > > > > unsigned char *buf)
> > > > > > > +int nand_spl_load_image(uint32_t from, unsigned int size, void
> > > > > > > *buf)
> > > > > > > 
> > > > > > >  {
> > > > > > >  
> > > > > > >  	int i;
> > > > > > >  	unsigned int page;
> > > > > > > 
> > > > > > > @@ -303,6 +303,7 @@ static int nand_load(unsigned int from,
> > > > > > > unsigned int size, unsigned char *buf)
> > > > > > > 
> > > > > > >  	page = from / CONFIG_SYS_NAND_PAGE_SIZE;
> > > > > > >  	i = 0;
> > > > > > > 
> > > > > > > +	size = roundup(size, CONFIG_SYS_NAND_PAGE_SIZE);
> > > > > > > 
> > > > > > >  	while (i < size / CONFIG_SYS_NAND_PAGE_SIZE) {
> > > > > > >  	
> > > > > > >  		if (nfc_read_page(page, buf) < 0)
> > > > > > >  		
> > > > > > >  			return -1;
> > > > > > > 
> > > > > > > @@ -332,6 +333,7 @@ static int nand_load(unsigned int from,
> > > > > > > unsigned int size, unsigned char *buf)
> > > > > > > 
> > > > > > >  	return 0;
> > > > > > >  
> > > > > > >  }
> > > > > > > 
> > > > > > > +#ifdef CONFIG_SPL_NAND_SUPPORT_LEGACY
> > > > > > > 
> > > > > > >  /*
> > > > > > >  
> > > > > > >   * The main entry for NAND booting. It's necessary that SDRAM is
> > > > > > >   already * configured and available since this code loads the
> > > > > > >   main U-Boot image
> > > > > > > 
> > > > > > > @@ -345,8 +347,9 @@ void nand_boot(void)
> > > > > > > 
> > > > > > >  	 * CONFIG_SYS_NAND_U_BOOT_OFFS and CONFIG_SYS_NAND_U_BOOT_SIZE
> > > > > > >  	 must * be aligned to full pages
> > > > > > >  	 */
> > > > > > > 
> > > > > > > -	if (!nand_load(CONFIG_SYS_NAND_U_BOOT_OFFS,
> > > > > > > CONFIG_SYS_NAND_U_BOOT_SIZE, -		       (uchar
> > > > > > > *)CONFIG_SYS_NAND_U_BOOT_DST)) {
> > > > > > > +	if (!nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
> > > > > > > +			CONFIG_SYS_NAND_U_BOOT_SIZE,
> > > > > > > +			(uchar *)CONFIG_SYS_NAND_U_BOOT_DST)) {
> > > > > > > 
> > > > > > >  		/* Copy from NAND successful, start U-boot */
> > > > > > >  		uboot = (void *)CONFIG_SYS_NAND_U_BOOT_START;
> > > > > > >  		uboot();
> > > > > > > 
> > > > > > > @@ -364,3 +367,7 @@ void hang(void)
> > > > > > > 
> > > > > > >  	/* Loop forever */
> > > > > > >  	while (1) ;
> > > > > > >  
> > > > > > >  }
> > > > > > > 
> > > > > > > +#endif
> > > > > > > +
> > > > > > > +void nand_init(void) {}
> > > > > > > +void nand_deselect(void) {}
> > > > > > > diff --git a/include/configs/mx31pdk.h
> > > > > > > b/include/configs/mx31pdk.h index 1754595..217552e 100644
> > > > > > > --- a/include/configs/mx31pdk.h
> > > > > > > +++ b/include/configs/mx31pdk.h
> > > > > > > @@ -50,6 +50,7 @@
> > > > > > > 
> > > > > > >  #define CONFIG_SPL_LDSCRIPT	"arch/$(ARCH)/cpu/u-boot-
> spl.lds"
> > > > > > >  #define CONFIG_SPL_MAX_SIZE	2048
> > > > > > >  #define CONFIG_SPL_NAND_SUPPORT
> > > > > > > 
> > > > > > > +#define CONFIG_SPL_NAND_SUPPORT_LEGACY
> > > > > > > 
> > > > > > >  #define CONFIG_SPL_TEXT_BASE	0x87dc0000
> > > > > > >  #define CONFIG_SYS_TEXT_BASE	0x87e00000
> > > > > > > 
> > > > > > > diff --git a/include/configs/tx25.h b/include/configs/tx25.h
> > > > > > > index e72f8f6..7c362d0 100644
> > > > > > > --- a/include/configs/tx25.h
> > > > > > > +++ b/include/configs/tx25.h
> > > > > > > @@ -37,6 +37,7 @@
> > > > > > > 
> > > > > > >  #define CONFIG_SPL_LDSCRIPT		"arch/$(ARCH)/cpu/u-
> boot-
> > > > 
> > > > spl.lds"
> > > > 
> > > > > > >  #define CONFIG_SPL_MAX_SIZE		2048
> > > > > > >  #define CONFIG_SPL_NAND_SUPPORT
> > > > > > > 
> > > > > > > +#define CONFIG_SPL_NAND_SUPPORT_LEGACY
> > > > > > > 
> > > > > > >  #define CONFIG_SPL_TEXT_BASE		0x810c0000
> > > > > > >  #define CONFIG_SYS_TEXT_BASE		0x81200000
> > > > > > > 
> > > > > > > --
> > > > > > > 1.7.11.7
> > > > > > 
> > > > > > This is not about legacy vs. non-legacy. This is about basic vs.
> > > > > > more featured
> > > > > > SPL because of SPL size constraints. So what about dropping
> > > > > > CONFIG_SPL_NAND_SUPPORT_LEGACY and testing for CONFIG_SPL_FRAMEWORK
> > > > > > definition
> > > > > > instead?
> > > > 
> > > > I was thinking about that, but the symbol is unrelated to NAND.
> > > 
> > > Well, it's CONFIG_SPL_FRAMEWORK + CONFIG_SPL_NAND_SUPPORT that defines
> > > the other
> > > implementation, and CONFIG_SPL_NAND_SUPPORT triggers the build of
> > > mxc_nand_spl.c
> > > for SPL, so the common point is CONFIG_SPL_FRAMEWORK.
> > > 
> > > > I still think
> > > > it's either a matter of fixing for new SPL or removing those two
> > > > boards. The
> > > > nand_spl/ stuff shall be removed ASAP.
> > > 
> > > Removing those boards is not a solution.
> > > 
> > > Is it really about "new" SPL? The generic SPL is enabled by CONFIG_SPL,
> > > and CONFIG_SPL_FRAMEWORK is a sub-option. If the generic SPL rules
> > > imposed to use the SPL framework functions, there would be no such
> > > sub-option. So it looks like
> > > these boards are complying to the new SPL rules.
> > > 
> > > We could see if using CONFIG_SPL_FRAMEWORK would still allow the SPL to
> > > fit in
> > > 2 kiB in order to drop this function, but if it does not fit, the new SPL
> > > rules
> > > should still make it possible to have a solution for any board having SPL
> > > size
> > > constraints.
> > 
> > I've just quickly build-tested the hack-patch below to have a guess of the
> > SPL size for mx31pdk with CONFIG_SPL_FRAMEWORK, and I get 3.9 kiB, so way
> > more than the maximum 2 kiB. Hence, these boards can't unfortunately be
> > made more generic, but it's not a reason to remove them. The generic SPL
> > must allow such hardware to be supported by U-Boot.
> 
> See the other email for my other idea. Either we can go with that or I can
> focus
> on making use of the regular MXC NAND driver on mx5, since there's no 2KiB
> limit
> there.

The latter is probably overkill and not worth it.

Best regards,
Benoît

Patch

diff --git a/board/freescale/mx31pdk/mx31pdk.c b/board/freescale/mx31pdk/mx31pdk.c
index 49158bd..83603f5 100644
--- a/board/freescale/mx31pdk/mx31pdk.c
+++ b/board/freescale/mx31pdk/mx31pdk.c
@@ -33,6 +33,7 @@ 
 #include <power/pmic.h>
 #include <fsl_pmic.h>
 #include <errno.h>
+#include <spl.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -40,7 +41,12 @@  DECLARE_GLOBAL_DATA_PTR;
 void board_init_f(ulong bootflag)
 {
 	relocate_code(CONFIG_SPL_TEXT_BASE);
-	asm volatile("ldr pc, =nand_boot");
+	asm volatile("ldr pc, =board_init_r");
+}
+
+u32 spl_boot_device(void)
+{
+	return BOOT_DEVICE_NAND;
 }
 #endif
 
diff --git a/drivers/mtd/nand/mxc_nand_spl.c b/drivers/mtd/nand/mxc_nand_spl.c
index 09f23c3..0d3374a 100644
--- a/drivers/mtd/nand/mxc_nand_spl.c
+++ b/drivers/mtd/nand/mxc_nand_spl.c
@@ -290,7 +290,7 @@  static int is_badblock(int pagenumber)
 	return 0;
 }
 
-static int nand_load(unsigned int from, unsigned int size, unsigned char *buf)
+int nand_spl_load_image(uint32_t from, unsigned int size, void *buf)
 {
 	int i;
 	unsigned int page;
@@ -332,35 +332,5 @@  static int nand_load(unsigned int from, unsigned int size, unsigned char *buf)
 	return 0;
 }
 
-/*
- * The main entry for NAND booting. It's necessary that SDRAM is already
- * configured and available since this code loads the main U-Boot image
- * from NAND into SDRAM and starts it from there.
- */
-void nand_boot(void)
-{
-	__attribute__((noreturn)) void (*uboot)(void);
-
-	/*
-	 * CONFIG_SYS_NAND_U_BOOT_OFFS and CONFIG_SYS_NAND_U_BOOT_SIZE must
-	 * be aligned to full pages
-	 */
-	if (!nand_load(CONFIG_SYS_NAND_U_BOOT_OFFS, CONFIG_SYS_NAND_U_BOOT_SIZE,
-		       (uchar *)CONFIG_SYS_NAND_U_BOOT_DST)) {
-		/* Copy from NAND successful, start U-boot */
-		uboot = (void *)CONFIG_SYS_NAND_U_BOOT_START;
-		uboot();
-	} else {
-		/* Unrecoverable error when copying from NAND */
-		hang();
-	}
-}
-
-/*
- * Called in case of an exception.
- */
-void hang(void)
-{
-	/* Loop forever */
-	while (1) ;
-}
+void nand_init(void) {}
+void nand_deselect(void) {}
diff --git a/include/configs/mx31pdk.h b/include/configs/mx31pdk.h
index 1754595..6b3443c 100644
--- a/include/configs/mx31pdk.h
+++ b/include/configs/mx31pdk.h
@@ -50,6 +50,11 @@ 
 #define CONFIG_SPL_LDSCRIPT	"arch/$(ARCH)/cpu/u-boot-spl.lds"
 #define CONFIG_SPL_MAX_SIZE	2048
 #define CONFIG_SPL_NAND_SUPPORT
+#define CONFIG_SPL_FRAMEWORK
+#define CONFIG_SPL_STACK	CONFIG_SYS_INIT_SP_ADDR
+#define CONFIG_SPL_LIBCOMMON_SUPPORT
+#define CONFIG_SPL_LIBGENERIC_SUPPORT
+#define CONFIG_SPL_SERIAL_SUPPORT
 
 #define CONFIG_SPL_TEXT_BASE	0x87dc0000
 #define CONFIG_SYS_TEXT_BASE	0x87e00000
diff --git a/spl/Makefile b/spl/Makefile
index b5a8de7..90f932a 100644
--- a/spl/Makefile
+++ b/spl/Makefile
@@ -88,6 +88,10 @@  ifneq ($(CONFIG_AM33XX)$(CONFIG_OMAP34XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX)$(C
 LIBS-y += $(CPUDIR)/omap-common/libomap-common.o
 endif
 
+ifneq (,$(filter $(SOC), mx25 mx27 mx5 mx6 mx31 mx35))
+LIBS-y += arch/$(ARCH)/imx-common/libimx-common.o
+endif
+
 ifneq ($(CONFIG_TEGRA),)
 LIBS-y += arch/$(ARCH)/cpu/$(SOC)-common/lib$(SOC)-common.o
 LIBS-y += arch/$(ARCH)/cpu/tegra-common/libcputegra-common.o