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rpi: Update environment to support booti and large initrd

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The existing values don't provide for decompressing an arm64 boot-image.
Add those values and move things apart a bit so that a 50MB kernel can be
accommodated.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Christopher Obbard <christopher.obbard@linaro.org>
Tested-by: Christopher Obbard <christopher.obbard@linaro.org> # CM4 1G
Reviewed-by: Christopher Obbard <christopher.obbard@linaro.org>
Tested-by: Christopher Obbard <christopher.obbard@linaro.org> # CM4 1G
This commit is contained in:
Simon Glass
2024-12-19 17:34:46 -07:00
committed by Peter Robinson
parent 23bb009351
commit 5f9cff14be
1 changed files with 16 additions and 11 deletions
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27
board/raspberrypi/rpi/rpi.env
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@@ -48,28 +48,33 @@ dfu_alt_info+=zImage fat 0 1
*
* scriptaddr and pxefile_addr_r can be pretty much anywhere that doesn't
* conflict with something else. Reserving 1M for each of them at
* 0x02400000-0x02500000 and 0x02500000-0x02600000 should be plenty.
* 0x05400000-0x05500000 and 0x05500000-0x05600000 should be plenty.
*
* On ARM, both the DTB and any possible initrd must be loaded such that they
* fit inside the lowmem mapping in Linux. In practice, this usually means not
* more than ~700M away from the start of the kernel image but this number can
* be larger OR smaller depending on e.g. the 'vmalloc=xxxM' command line
* parameter given to the kernel. So reserving memory from low to high
* satisfies this constraint again. Reserving 1M at 0x02600000-0x02700000 for
* the DTB leaves rest of the free RAM to the initrd starting at 0x02700000.
* Even with the smallest possible CPU-GPU memory split of the CPU getting
* only 64M, the remaining 25M starting at 0x02700000 should allow quite
* large initrds before they start colliding with U-Boot.
* satisfies this constraint again. Reserving 1M at 0x05600000-0x05700000 for
* the DTB leaves rest of the free RAM to the initrd starting at 0x05700000.
* This means that the board must have at least 128MB of RAM available to
* U-Boot, more if the initrd is large.
*
* Limit bootm_size to 512MB so that all boot images stay within the bottom
* For compressed kernels, the maximum size is just under 32MB, with an area for
* decompression at 0x02000000 with space for 52MB, which is plenty for current
* kernels.
*
* limit bootm_size to 512MB so that all boot images stay within the bottom
* 512MB of memory
*/
bootm_size=0x20000000
kernel_addr_r=0x00080000
scriptaddr=0x02400000
pxefile_addr_r=0x02500000
fdt_addr_r=0x02600000
ramdisk_addr_r=0x02700000
kernel_comp_addr_r=0x02000000
kernel_comp_size=0x03400000
scriptaddr=0x05400000
pxefile_addr_r=0x05500000
fdt_addr_r=0x05600000
ramdisk_addr_r=0x05700000
boot_targets=mmc usb pxe dhcp