This series is to support loading a 32-bit OS, the execution state will
change from AArch64 to AArch32 when jumping to kernel. The architecture
information will be got through checking FIT image, then U-Boot will
load 32-bit OS or 64-bit OS automatically.
Spin-table method is used for secondary cores to load 32-bit OS. The
architecture information will be got through checking FIT image and
saved in the os_arch element of spin-table, then the secondary cores
will check os_arch and jump to 32-bit OS or 64-bit OS automatically.
---------------------------------------
Changes in v4:
- Correct config ARM64_SUPPORT_AARCH32.
- Omit arch and ftaddr arguments.
- Rename "xreg5" to "tmp".
- Use xxx_RES1 to combine all RES1 fields in xxx register.
- Use an immediate cmp directly.
- Use #ifdef for CONFIG_ARM64_SUPPORT_AARCH32.
Changes in v3:
- Comments the functions and the arguments.
- Rename the real parameters.
- Use the macros instead of the magic values.
- Remove the redundant codes.
- Clean up all of the mess in boot_jump_linux().
- Add CONFIG_ARM64_SUPPORT_AARCH32 to detect for some ARM64 system doesn't
support AArch32 state.
- Adjust the arguments for armv8_switch_to_el2_m and armv8_switch_to_el1_m.
Changes in v2:
- armv8_switch_to_el2_aarch32() is removed. armv8_switch_to_el2_m is used
to switch to AArch64 EL2 or AArch32 Hyp.
- armv8_switch_to_el1_aarch32() is removed. armv8_switch_to_el1_m is used
to switch to AArch64 EL1 or AArch32 SVC.
- Support to call armv8_switch_to_el2_m and armv8_switch_to_el1_m.
Alison Wang (2):
armv8: Support loading 32-bit OS in AArch32 execution state
armv8: fsl-layerscape: SMP support for loading 32-bit OS
arch/arm/Kconfig | 6 ++++
arch/arm/cpu/armv8/fsl-layerscape/lowlevel.S | 35 +++++++++++++++++---
arch/arm/cpu/armv8/fsl-layerscape/mp.c | 10 ++++++
arch/arm/cpu/armv8/start.S | 1 +
arch/arm/cpu/armv8/transition.S | 8 ++---
arch/arm/include/asm/arch-fsl-layerscape/mp.h | 6 ++++
arch/arm/include/asm/macro.h | 172
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----------------------
arch/arm/include/asm/system.h | 111
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
arch/arm/lib/bootm.c | 24 +++++++++++---
common/image-fit.c | 19 ++++++++++-
10 files changed, 336 insertions(+), 56 deletions(-)
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