@@ -46,7 +46,7 @@ EXTRA_IMAGEDEPENDS += "secure-partitions"
# Linux kernel
PREFERRED_PROVIDER_virtual/kernel:forcevariable = "linux-yocto"
PREFERRED_VERSION_linux-yocto = "5.15%"
-KERNEL_IMAGETYPE = "Image"
+KERNEL_IMAGETYPE = "Image.gz"
INITRAMFS_IMAGE_BUNDLE ?= "1"
new file mode 100644
@@ -0,0 +1,32 @@
+From df70c467c5d100f1522b4521f48da4c51e43688c Mon Sep 17 00:00:00 2001
+From: Jon Mason <jon.mason@arm.com>
+Date: Thu, 25 Aug 2022 13:48:22 +0000
+Subject: [PATCH 25/25] corstone1000: use a compressed kernel
+
+The corstone1000 kernel has become too large to fit in the available
+storage. Swtiching to a compressed kernel avoids the problem, but
+requires uncompressing it. Add this decompression to the default boot
+instructions.
+
+Signed-off-by: Jon Mason <jon.mason@arm.com>
+---
+ include/configs/corstone1000.h | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/include/configs/corstone1000.h b/include/configs/corstone1000.h
+index d9855bf91e..d0cbc40121 100644
+--- a/include/configs/corstone1000.h
++++ b/include/configs/corstone1000.h
+@@ -126,7 +126,8 @@
+ #define CONFIG_BOOTCOMMAND \
+ "run retrieve_kernel_load_addr;" \
+ "echo Loading kernel from $kernel_addr to memory ... ;" \
+- "loadm $kernel_addr $kernel_addr_r 0xc00000;" \
++ "unzip $kernel_addr 0x90000000;" \
++ "loadm 0x90000000 $kernel_addr_r 0xd00000;" \
+ "usb start; usb reset;" \
+ "run distro_bootcmd;" \
+ "bootefi $kernel_addr_r $fdtcontroladdr;"
+--
+2.30.2
+
@@ -42,6 +42,7 @@ SRC_URI:append:corstone1000 = " \
file://0022-efi_loader-send-bootcomplete-message-to-secure-encla.patch \
file://0023-efi_loader-fix-null-pointer-exception-with-get_image.patch \
file://0024-arm-corstone1000-add-mmc-for-fvp.patch \
+ file://0025-corstone1000-use-a-compressed-kernel.patch \
"
#
@@ -12,4 +12,4 @@ part --source rawcopy --sourceparams="file=tfm_s_signed.bin" --align 1 --no-tabl
part --source rawcopy --sourceparams="file=signed_fip-corstone1000.bin" --align 1 --no-table --fixed-size 2
# Rawcopy of kernel with initramfs
-part --source rawcopy --sourceparams="file=Image-initramfs-${MACHINE}.bin" --no-table --fixed-size 12
+part --source rawcopy --sourceparams="file=Image.gz-initramfs-${MACHINE}.bin" --no-table --fixed-size 12
To fit the kernel image into the allotted space, a compressed kernel image is now needed. Use the Image.gz from the kernel build process and change the relevant places to use the new image name. This also necessitates adding an unzip command to u-boot to uncompress it to memory (and the loadm is still needed to setup the efi mem boot device). Also, the unzipped image is larger than before. So, increase the size that loadm is copying. This change shrinks the kernel image size from 7.8MB to 3.2MB Signed-off-by: Jon Mason <jon.mason@arm.com> --- .../conf/machine/include/corstone1000.inc | 2 +- ...corstone1000-use-a-compressed-kernel.patch | 32 +++++++++++++++++++ .../recipes-bsp/u-boot/u-boot_%.bbappend | 1 + .../wic/corstone1000-image.corstone1000.wks | 2 +- 4 files changed, 35 insertions(+), 2 deletions(-) create mode 100644 meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0025-corstone1000-use-a-compressed-kernel.patch