| Message ID | 1347996365-17079-1-git-send-email-hvaibhav@ti.com |
|---|---|
| State | Accepted |
| Delegated to: | Tom Rini |
| Headers | show |
On Tue, Sep 18, 2012 at 09:26:05AM -0000, hvaibhav@ti.com wrote: > For AM335X boards, such as the EVM and Bone Linux kernel fails to > locate the device tree blob on boot. The reason being is that > u-boot is copying the DT blob to the upper part of RAM when booting > the kernel and the kernel is unable to access the blob. > By setting the fdt_high variable to 0xffffffff (to prevent the copy) > the kernel is able to locate the DT blob and boot. > > This patch is tested on BeagleBone platform. > > Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com> > Cc: Tom Rini <trini@ti.com> So, a "funny" thing happened along the way since this patch. The newest revision of the EVM includes 1GB of DDR and thus we do now need this patch. Applied to u-boot-ti/master, thanks!
On Sat, Jan 26, 2013 at 03:40:51, Rini, Tom wrote: > On Tue, Sep 18, 2012 at 09:26:05AM -0000, hvaibhav@ti.com wrote: > > > For AM335X boards, such as the EVM and Bone Linux kernel fails to > > locate the device tree blob on boot. The reason being is that > > u-boot is copying the DT blob to the upper part of RAM when booting > > the kernel and the kernel is unable to access the blob. > > By setting the fdt_high variable to 0xffffffff (to prevent the copy) > > the kernel is able to locate the DT blob and boot. > > > > This patch is tested on BeagleBone platform. > > > > Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com> > > Cc: Tom Rini <trini@ti.com> > > So, a "funny" thing happened along the way since this patch. The newest > revision of the EVM includes 1GB of DDR and thus we do now need this > patch. Applied to u-boot-ti/master, thanks! > Ohhh Great, Thanks for pulling in this patch Tom. Thanks, Vaibhav
diff --git a/include/configs/am335x_evm.h b/include/configs/am335x_evm.h index a3752bc..1af9b97 100644 --- a/include/configs/am335x_evm.h +++ b/include/configs/am335x_evm.h @@ -49,6 +49,7 @@ #define CONFIG_EXTRA_ENV_SETTINGS \ "loadaddr=0x80200000\0" \ "fdtaddr=0x80F80000\0" \ + "fdt_high=0xffffffff\0" \ "rdaddr=0x81000000\0" \ "bootfile=/boot/uImage\0" \ "console=ttyO0,115200n8\0" \
For AM335X boards, such as the EVM and Bone Linux kernel fails to locate the device tree blob on boot. The reason being is that u-boot is copying the DT blob to the upper part of RAM when booting the kernel and the kernel is unable to access the blob. By setting the fdt_high variable to 0xffffffff (to prevent the copy) the kernel is able to locate the DT blob and boot. This patch is tested on BeagleBone platform. Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com> Cc: Tom Rini <trini@ti.com> --- include/configs/am335x_evm.h | 1 + 1 files changed, 1 insertions(+), 0 deletions(-)