On Fri, Nov 29, 2024 at 12:12:57PM -0300, Hiago De Franco wrote:
From: Hiago De Franco hiago.franco@toradex.com
The current value of CONFIG_FASTBOOT_BUF_ADDR is incorrect for hardware with 512MB and 1GB of RAM. The RAM address ranges for these devices are:
- 512MB:
- Start: 0x80000000
- End: 0xA0000000
- 1GB:
- Start: 0x80000000
- End: 0xC0000000
The current buffer address makes fastboot downloads work only on hardware with 2GB of RAM.
To fix this issue:
- Lower CONFIG_FASTBOOT_BUF_ADDR to 0x80080000. This places the buffer near the beginning of RAM with a 512KB offset, as starting at exactly 0x80000000 conflicts with the ATF load address. Following K3_ATF_LOAD_ADDR configuration, ATF is loaded at 0x80000000:
config K3_ATF_LOAD_ADDR hex "Load address of ATF image" default 0x80000000 if (SOC_K3_AM625 || SOC_K3_AM62A7 || SOC_K3_AM62P5 || SOC_K3_J722S) default 0x70000000 help The load address for the ATF image. This value is used to build the FIT image header that places ATF in memory where it will run.
- Reduce the size of the download buffer to 128MB, avoiding overlaps with RAMDISK_ADDR_R. This is a good enough value for individual downloads.
Theses changes make fastboot downloads work with 512MB and 1GB devices.
Fixes: defe30a78b76 ("verdin-am62: add DFU, USB and UUU fastboot support") Signed-off-by: Hiago De Franco hiago.franco@toradex.com
configs/verdin-am62_a53_defconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/configs/verdin-am62_a53_defconfig b/configs/verdin-am62_a53_defconfig index 49fb9790e295..6fa1a9d2c552 100644 --- a/configs/verdin-am62_a53_defconfig +++ b/configs/verdin-am62_a53_defconfig @@ -122,8 +122,8 @@ CONFIG_SYS_DFU_MAX_FILE_SIZE=0x800000 CONFIG_DMA_CHANNELS=y CONFIG_TI_K3_NAVSS_UDMA=y CONFIG_USB_FUNCTION_FASTBOOT=y -CONFIG_FASTBOOT_BUF_ADDR=0xC0000000 -CONFIG_FASTBOOT_BUF_SIZE=0x2F000000 +CONFIG_FASTBOOT_BUF_ADDR=0x80080000 +CONFIG_FASTBOOT_BUF_SIZE=0x8000000 CONFIG_FASTBOOT_UUU_SUPPORT=y CONFIG_TI_SCI_PROTOCOL=y CONFIG_GPIO_HOG=y
Why not 0x88200000 which is what CONFIG_SYS_LOAD_ADDR is?