mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-13 06:42:56 +00:00
fc2af2d978
Use the new environment format so we can drop most of the config.h file. Signed-off-by: Simon Glass <sjg@chromium.org>
77 lines
3 KiB
Bash
77 lines
3 KiB
Bash
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
|
|
/* environment for Raspberry Pi boards */
|
|
|
|
dhcpuboot=usb start; dhcp u-boot.uimg; bootm
|
|
|
|
/* Environment */
|
|
stdin=serial,usbkbd
|
|
stdout=serial,vidconsole
|
|
stderr=serial,vidconsole
|
|
|
|
/* DFU over USB/UDC */
|
|
#ifdef CONFIG_CMD_DFU
|
|
dfu_alt_info=u-boot.bin fat 0 1;uboot.env fat 0 1;
|
|
config.txt fat 0 1;
|
|
#ifdef CONFIG_ARM64
|
|
dfu_alt_info+=Image fat 0 1
|
|
#else
|
|
dfu_alt_info+=zImage fat 0 1
|
|
#endif
|
|
#endif /* CONFIG_CMD_DFU */
|
|
|
|
/*
|
|
* Memory layout for where various images get loaded by boot scripts:
|
|
*
|
|
* I suspect address 0 is used as the SMP pen on the RPi2, so avoid this.
|
|
*
|
|
* Older versions of the boot firmware place the firmware-loaded DTB at 0x100,
|
|
* newer versions place it in high memory. So prevent U-Boot from doing its own
|
|
* DTB + initrd relocation so that we won't accidentally relocate the initrd
|
|
* over the firmware-loaded DTB and generally try to lay out things starting
|
|
* from the bottom of RAM.
|
|
*
|
|
* kernel_addr_r has different constraints on ARM and Aarch64. For 32-bit ARM,
|
|
* it must be within the first 128M of RAM in order for the kernel's
|
|
* CONFIG_AUTO_ZRELADDR option to work. The kernel itself will be decompressed
|
|
* to 0x8000 but the decompressor clobbers 0x4000-0x8000 as well. The
|
|
* decompressor also likes to relocate itself to right past the end of the
|
|
* decompressed kernel, so in total the sum of the compressed and
|
|
* decompressed kernel needs to be reserved.
|
|
*
|
|
* For Aarch64, the kernel image is uncompressed and must be loaded at
|
|
* text_offset bytes (specified in the header of the Image) into a 2MB
|
|
* boundary. The 'booti' command relocates the image if necessary. Linux uses
|
|
* a default text_offset of 0x80000. In summary, loading at 0x80000
|
|
* satisfies all these constraints and reserving memory up to 0x02400000
|
|
* permits fairly large (roughly 36M) kernels.
|
|
*
|
|
* 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.
|
|
*
|
|
* 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.
|
|
*/
|
|
#ifdef CONFIG_ARM64
|
|
fdt_high=ffffffffffffffff
|
|
initrd_high=ffffffffffffffff
|
|
#else
|
|
fdt_high=ffffffff
|
|
initrd_high=ffffffff
|
|
#endif
|
|
kernel_addr_r=0x00080000
|
|
scriptaddr=0x02400000
|
|
pxefile_addr_r=0x02500000
|
|
fdt_addr_r=0x02600000
|
|
ramdisk_addr_r=0x02700000
|
|
|
|
boot_targets=mmc usb pxe dhcp
|