Re: [U-Boot] [PATCH 1/6] sniper: Move PXE file address to a viable location
Le samedi 26 mars 2016 à 14:59 -0400, Tom Rini a écrit : > On Sat, Mar 26, 2016 at 12:19:59PM +0100, Paul Kocialkowski wrote: > > > > This moves the PXE file address out of the bounds of the U-Boot image (which > > is > > loaded at 0x8010). > > > > This also moves the ramdisk address to a better-looking aligned location. > > > > Signed-off-by: Paul Kocialkowski > > --- > > include/configs/sniper.h | 4 ++-- > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/include/configs/sniper.h b/include/configs/sniper.h > > index 171a8c4..2598af1 100644 > > --- a/include/configs/sniper.h > > +++ b/include/configs/sniper.h > > @@ -243,8 +243,8 @@ > > "loadaddr=0x8200\0" \ > > "fdt_addr_r=0x8800\0" \ > > "fdtaddr=0x8800\0" \ > > - "ramdisk_addr_r=0x8808\0" \ > > - "pxefile_addr_r=0x8010\0" \ > > + "ramdisk_addr_r=0x8400\0" \ > > + "pxefile_addr_r=0x8600\0" \ > > "scriptaddr=0x8000\0" \ > > "bootm_size=0x1000\0" \ > > "boot_mmc_dev=0\0" \ > I strongly discourage these locations. Quoting myself from > ti_armv7_common.h: > /* > * We setup defaults based on constraints from the Linux kernel, which should > * also be safe elsewhere. We have the default load at 32MB into DDR (for > * the kernel), FDT above 128MB (the maximum location for the end of the > * kernel), and the ramdisk 512KB above that (allowing for hopefully never > * seen large trees). We say all of this must be within the first 256MB > * as that will normally be within the kernel lowmem and thus visible via > * bootm_size and we only run on platforms with 256MB or more of memory. > */ Thanks for the clarification, I think the addresses make sense as they are then. > Now, have you actually run into a problem with overwriting U-Boot? Actually, I had forgotten that U-Boot relocates. This address only caught my eye as being equal to CONFIG_SYS_TEXT_BASE when going through the header, but I didn't investigate enough. There is indeed no run-time problem, thanks to relocation. I'll simply drop these patches. > Since U-Boot will run-time relocate, this shouldn't be a problem in > practice? The minor games we play with locations here are due to Falcon > Mode where the BSS in question here is the one for SPL and we don't want > those two to conflict. -- Paul Kocialkowski, low-level free software developer on embedded devices Website: https://www.paulk.fr/ Coding blog: https://code.paulk.fr/ Git repositories: https://git.paulk.fr/ https://git.code.paulk.fr/ signature.asc Description: This is a digitally signed message part ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] [PATCH 1/6] sniper: Move PXE file address to a viable location
On Sat, Mar 26, 2016 at 12:19:59PM +0100, Paul Kocialkowski wrote: > This moves the PXE file address out of the bounds of the U-Boot image (which > is > loaded at 0x8010). > > This also moves the ramdisk address to a better-looking aligned location. > > Signed-off-by: Paul Kocialkowski > --- > include/configs/sniper.h | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/include/configs/sniper.h b/include/configs/sniper.h > index 171a8c4..2598af1 100644 > --- a/include/configs/sniper.h > +++ b/include/configs/sniper.h > @@ -243,8 +243,8 @@ > "loadaddr=0x8200\0" \ > "fdt_addr_r=0x8800\0" \ > "fdtaddr=0x8800\0" \ > - "ramdisk_addr_r=0x8808\0" \ > - "pxefile_addr_r=0x8010\0" \ > + "ramdisk_addr_r=0x8400\0" \ > + "pxefile_addr_r=0x8600\0" \ > "scriptaddr=0x8000\0" \ > "bootm_size=0x1000\0" \ > "boot_mmc_dev=0\0" \ I strongly discourage these locations. Quoting myself from ti_armv7_common.h: /* * We setup defaults based on constraints from the Linux kernel, which should * also be safe elsewhere. We have the default load at 32MB into DDR (for * the kernel), FDT above 128MB (the maximum location for the end of the * kernel), and the ramdisk 512KB above that (allowing for hopefully never * seen large trees). We say all of this must be within the first 256MB * as that will normally be within the kernel lowmem and thus visible via * bootm_size and we only run on platforms with 256MB or more of memory. */ Now, have you actually run into a problem with overwriting U-Boot? Since U-Boot will run-time relocate, this shouldn't be a problem in practice? The minor games we play with locations here are due to Falcon Mode where the BSS in question here is the one for SPL and we don't want those two to conflict. -- Tom signature.asc Description: Digital signature ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
[U-Boot] [PATCH 1/6] sniper: Move PXE file address to a viable location
This moves the PXE file address out of the bounds of the U-Boot image (which is loaded at 0x8010). This also moves the ramdisk address to a better-looking aligned location. Signed-off-by: Paul Kocialkowski --- include/configs/sniper.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/configs/sniper.h b/include/configs/sniper.h index 171a8c4..2598af1 100644 --- a/include/configs/sniper.h +++ b/include/configs/sniper.h @@ -243,8 +243,8 @@ "loadaddr=0x8200\0" \ "fdt_addr_r=0x8800\0" \ "fdtaddr=0x8800\0" \ - "ramdisk_addr_r=0x8808\0" \ - "pxefile_addr_r=0x8010\0" \ + "ramdisk_addr_r=0x8400\0" \ + "pxefile_addr_r=0x8600\0" \ "scriptaddr=0x8000\0" \ "bootm_size=0x1000\0" \ "boot_mmc_dev=0\0" \ -- 2.7.4 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
