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imx8mm/n_evk: enable booting Image.gz and avoid extra memcpy

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Add support for booting compressed kernel Image.gz by defining
kernel_comp_addr_r and kernel_comp_size in the default environment.

Set kernel_comp_addr_r to a high memory region to provide a dedicated
decompression buffer, avoiding overlap between compressed
input and decompressed output.

Also adjust CONFIG_SYS_LOAD_ADDR from 0x40480000 to 0x40400000.

With TEXT_OFFSET=0, the kernel is relocated directly to loadaddr, so
separating decompression and execution regions is required to guarantee
safe decompression without additional copying.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan
2026-06-26 23:02:46 -03:00
committed by Fabio Estevam
parent 77c8ba8826
commit 2619f50f72
4 changed files with 6 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
board/nxp/imx8mm_evk/imx8mm_evk.env
+2
View File
@@ -12,6 +12,8 @@ initrd_addr=0x48080000
image=Image
ip_dyn=yes
kernel_addr_r=0x42000000
kernel_comp_addr_r=0x60000000
kernel_comp_size=0x2000000
loadaddr=CONFIG_SYS_LOAD_ADDR
mmcautodetect=yes
mmcdev=CONFIG_ENV_MMC_DEVICE_INDEX
board/nxp/imx8mn_evk/imx8mn_evk.env
+2
View File
@@ -12,6 +12,8 @@ initrd_addr=0x48080000
image=Image
ip_dyn=yes
kernel_addr_r=0x42000000
kernel_comp_addr_r=0x60000000
kernel_comp_size=0x2000000
loadaddr=CONFIG_SYS_LOAD_ADDR
mmcautodetect=yes
mmcdev=CONFIG_ENV_MMC_DEVICE_INDEX
configs/imx8mm_evk_defconfig
+1 -1
View File
@@ -18,7 +18,7 @@ CONFIG_SPL_TEXT_BASE=0x7E1000
CONFIG_SPL_HAS_BSS_LINKER_SECTION=y
CONFIG_SPL_BSS_START_ADDR=0x910000
CONFIG_SPL_BSS_MAX_SIZE=0x2000
CONFIG_SYS_LOAD_ADDR=0x40480000
CONFIG_SYS_LOAD_ADDR=0x40400000
CONFIG_SPL=y
CONFIG_EFI_MM_COMM_TEE=y
CONFIG_EFI_VAR_BUF_SIZE=139264
configs/imx8mm_evk_fspi_defconfig
+1 -1
View File
@@ -21,7 +21,7 @@ CONFIG_SPL_TEXT_BASE=0x7E2000
CONFIG_SPL_HAS_BSS_LINKER_SECTION=y
CONFIG_SPL_BSS_START_ADDR=0x910000
CONFIG_SPL_BSS_MAX_SIZE=0x2000
CONFIG_SYS_LOAD_ADDR=0x40480000
CONFIG_SYS_LOAD_ADDR=0x40400000
CONFIG_SPL=y
CONFIG_FIT=y
CONFIG_FIT_EXTERNAL_OFFSET=0x3000