Hi Marek, On Sun, 2018-04-15 at 15:37 +0200, Marek Vasut wrote: > The Arria10 uses slightly different boot image header than the Gen5 > SoCs, > in particular the header itself contains an offset from the start of > the > header to which the Arria10 jumps. This offset must not be negative, > yet > the header is placed at offset 0x40 of the bootable binary. > Therefore, to > jump into U-Boot, add a trampoline just past the Arria10 boot header > and > point to this trampoline at fixed offset from the header generated > using > the mkimage -T socfpgaimage_v1 . Note that it is not needed to jump > back > to offset 0x0 of the image, it is possible to jump directly at the > reset > label and save processing two instructions. > > Signed-off-by: Marek Vasut <ma...@denx.de> > Cc: Dinh Nguyen <dingu...@kernel.org> > Cc: Chin Liang See <chin.liang....@intel.com> > --- > arch/arm/mach-socfpga/include/mach/boot0.h | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/arm/mach-socfpga/include/mach/boot0.h > b/arch/arm/mach-socfpga/include/mach/boot0.h > index d6b9435d33..06bbe27d2c 100644 > --- a/arch/arm/mach-socfpga/include/mach/boot0.h > +++ b/arch/arm/mach-socfpga/include/mach/boot0.h > @@ -18,10 +18,10 @@ _start: > .word 0xcafec0d3; /* Checksum, zero-pad */ > nop; > > - b reset; /* SoCFPGA jumps here */ > - nop; > + b reset; /* SoCFPGA Gen5 jumps here */ > nop; > nop; > + b reset; /* SoCFPGA Gen10 trampoline */
Our mkpimage tools from SOCEDS is using 0x14 as offset. Wonder can we standardize that by using 0x14 instead of proposed 0x18 in this patch? Thanks Chin Liang > #endif > > #endif /* __BOOT0_H */ _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
