From: Stefan Agner stefan.agner@toradex.com
This patchset enables to boot elf binaries on secondary Cortex-M class cores available on i.MX 6SoloX/7Solo/7Dual. This makes handling and loading firmwares much more convinient since all information where the firmware has to be loaded to is contained in the elf headers. A typical usage looks like this:
Colibri iMX7 # tftp ${loadaddr} firmware.elf && bootaux ${loadaddr} Using FEC0 device TFTP from server 192.168.10.1; our IP address is 192.168.10.2 Filename 'firmware.elf'. Load address: 0x80800000 Loading: ################################################## 88.3 KiB 5.4 MiB/s done Bytes transferred = 90424 (16138 hex) ## Starting auxiliary core at 0x1FFF8311 ... Colibri iMX7 #
Note that the bootaux command retrieved the entry point (PC) from the elf binary. Also all sections are translated to A7 addresses in order to properly load the firmware sections into the appropriate locations. Also cache flushes is taken care of, so that there is no manual dcache flush necessary anymore.
The NXP FreeRTOS BSP already generates elf binaries which can be directly used with this elf binary support.
The last patch adds bootaux support for Vybrid.
Stefan Agner (3): imx: imx-common: move aux core image parsing to common code imx: imx-common: add elf firmware support ARM: vf610: add auxiliary core boot support
arch/arm/cpu/armv7/mx6/soc.c | 30 +++++--- arch/arm/cpu/armv7/mx7/soc.c | 34 ++++++--- arch/arm/cpu/armv7/vf610/generic.c | 42 +++++++++++ arch/arm/imx-common/Kconfig | 2 +- arch/arm/imx-common/Makefile | 4 +- arch/arm/imx-common/imx_bootaux.c | 105 +++++++++++++++++++++++----- arch/arm/include/asm/arch-vf610/sys_proto.h | 8 +++ arch/arm/include/asm/imx-common/sys_proto.h | 6 ++ configs/colibri_vf_defconfig | 1 + 9 files changed, 198 insertions(+), 34 deletions(-) create mode 100644 arch/arm/include/asm/arch-vf610/sys_proto.h