Update the memory layout to be aligned with other platform and avoid overlap with 32MB Linux kernel (multiv7 image). + Kernel => 32MiB offset = 0xC2000000 and increase the bootm size to 32MiB + FDT => 64MiB offset = 0xc4000000 + SCRIPT => 65Mib offset = 0xc4100000 + PXESCRIPT => 66Mib offset = 0xc4200000 + SPLASHIMAGE => 67Mib offset = 0xc4300000 + RAMDISK => 68Mib offset = 0xc4400000 (not limited size)
In sources/boot/u-boot/doc/README.distro
+ kernel_addr_r: A size of 16MB for the kernel is likely adequate. + pxefile_addr_r: A size of 1MB for extlinux.conf is more than adequate. + fdt_addr_r: A size of 1MB for the FDT/DTB seems reasonable. + ramdisk_addr_r: It is recommended that this location be highest in RAM out of fdt_addr_, kernel_addr_r, and ramdisk_addr_r, so that the RAM disk can vary in size and use any available RAM. + pxefile_addr_r: A size of 1MB for extlinux.conf is more than adequate. + scriptaddr: A size of 1MB for extlinux.conf is more than adequate.
For suggestions on memory locations for ARM systems, you must follow the guidelines specified in Documentation/arm/Booting in the Linux kernel tree.
And in sources/linux-stm32mp/Documentation/arm/Booting
The zImage may also be placed in system RAM and called there. The kernel should be placed in the first 128MiB of RAM. It is recommended that it is loaded above 32MiB in order to avoid the need to relocate prior to decompression, which will make the boot process slightly faster.
Signed-off-by: Patrick Delaunay patrick.delaunay@st.com ---
include/configs/stm32mp1.h | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/include/configs/stm32mp1.h b/include/configs/stm32mp1.h index 48da1e3..f2508f7 100644 --- a/include/configs/stm32mp1.h +++ b/include/configs/stm32mp1.h @@ -53,6 +53,9 @@ #define CONFIG_SETUP_MEMORY_TAGS #define CONFIG_INITRD_TAG
+/* Extend size of kernel image for uncompression */ +#define CONFIG_SYS_BOOTM_LEN SZ_32M + /* SPL support */ #ifdef CONFIG_SPL /* BOOTROM load address */ @@ -106,12 +109,18 @@
#include <config_distro_bootcmd.h>
+/* + * memory layout for 32M uncompressed/compressed kernel, + * 1M fdt, 1M script, 1M pxe and 1M for splashimage + * and the ramdisk at the end. + */ #define CONFIG_EXTRA_ENV_SETTINGS \ - "scriptaddr=0xC0000000\0" \ - "pxefile_addr_r=0xC0000000\0" \ - "kernel_addr_r=0xC1000000\0" \ - "fdt_addr_r=0xC4000000\0" \ - "ramdisk_addr_r=0xC4100000\0" \ + "kernel_addr_r=0xc2000000\0" \ + "fdt_addr_r=0xc4000000\0" \ + "scriptaddr=0xc4100000\0" \ + "pxefile_addr_r=0xc4200000\0" \ + "splashimage=0xc4300000\0" \ + "ramdisk_addr_r=0xc4400000\0" \ "fdt_high=0xffffffff\0" \ "initrd_high=0xffffffff\0" \ STM32MP_BOOTCMD \