Am Mittwoch, den 29.08.2012, 14:21 +0200 schrieb Jean-Christophe
PLAGNIOL-VILLARD:
> On 11:10 Wed 29 Aug , Jan Weitzel wrote:
> > Add functions to read the barebox_arm_head, check barebox magicword
> > and read out the barebox image size.
> > Create a inital partion of 1Mb to access the barebox image on nand.
> >
> > Signed-off-by: Jan Weitzel <j.weit...@phytec.de>
> > ---
> > v2: remove fall back if header read fail
> > v3: fix header check, rebase master
> >
> > arch/arm/include/asm/barebox-arm-head.h | 4 ++
> > arch/arm/mach-omap/include/mach/xload.h | 2 +-
> > arch/arm/mach-omap/xload.c | 58
> > ++++++++++++++++++++++++++++--
> > 3 files changed, 59 insertions(+), 5 deletions(-)
> >
> > diff --git a/arch/arm/include/asm/barebox-arm-head.h
> > b/arch/arm/include/asm/barebox-arm-head.h
> > index 2c250e9..1ddfc0f 100644
> > --- a/arch/arm/include/asm/barebox-arm-head.h
> > +++ b/arch/arm/include/asm/barebox-arm-head.h
> > @@ -1,6 +1,10 @@
> > #ifndef __ASM_ARM_HEAD_H
> > #define __ASM_ARM_HEAD_H
> >
> > +#define ARM_HEAD_SIZE 0x30
> > +#define HEAD_MAGICWORD_OFFSET 0x20
> > +#define HEAD_SIZE_OFFSET 0x2C
> > +
> > static inline void barebox_arm_head(void)
> > {
> > __asm__ __volatile__ (
> > diff --git a/arch/arm/mach-omap/include/mach/xload.h
> > b/arch/arm/mach-omap/include/mach/xload.h
> > index 844b57f..26f1b68 100644
> > --- a/arch/arm/mach-omap/include/mach/xload.h
> > +++ b/arch/arm/mach-omap/include/mach/xload.h
> > @@ -1,7 +1,7 @@
> > #ifndef _MACH_XLOAD_H
> > #define _MACH_XLOAD_H
> >
> > -void *omap_xload_boot_nand(int offset, int size);
> > +void *omap_xload_boot_nand(int offset);
> > void *omap_xload_boot_mmc(void);
> >
> > enum omap_boot_src {
> > diff --git a/arch/arm/mach-omap/xload.c b/arch/arm/mach-omap/xload.c
> > index 13024ab..d9765b7 100644
> > --- a/arch/arm/mach-omap/xload.c
> > +++ b/arch/arm/mach-omap/xload.c
> > @@ -7,16 +7,66 @@
> > #include <fcntl.h>
> > #include <mach/xload.h>
> > #include <sizes.h>
> > +#include <asm/barebox-arm-head.h>
> >
> > -void *omap_xload_boot_nand(int offset, int size)
> > +void *read_image_head(const char *name)
> > {
> > + void *header = xmalloc(ARM_HEAD_SIZE);
> > + struct cdev *cdev;
> > int ret;
> > - void *to = xmalloc(size);
> > +
> > + cdev = cdev_open(name, O_RDONLY);
> > + if (!cdev) {
> > + printf("failed to open partition\n");
> > + return NULL;
> > + }
> > +
> > + ret = cdev_read(cdev, header, ARM_HEAD_SIZE, 0, 0);
> > + cdev_close(cdev);
> > +
> > + if (ret != ARM_HEAD_SIZE) {
> > + printf("failed to read from partition\n");
> > + return NULL;
> > + }
> > +
> > + return header;
> > +}
> > +
> > +unsigned int get_image_size(void *head)
> > +{
> > + unsigned int ret = 0;
> > + unsigned int *psize = head + HEAD_SIZE_OFFSET;
> > + const char *pmagic = head + HEAD_MAGICWORD_OFFSET;
> > +
> > + if (!strcmp(pmagic, "barebox"))
> > + ret = *psize;
> > + debug("Detected barebox image size %u\n", ret);
> factorise the code with filetype
What exactly do you mean? I could factorise it by boot source (mmc / nand) with
complete omap_xload_boot_nand.
Jan
> Best Regards,
> J.
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