c48fec6e7c
CNTFRQ_EL0 is only writable from the highest supported exception level on the platform. For Armv8-A, this is typically EL3, but technically EL2 and EL3 are optional so it may need to be initialized at EL2 or EL1. For Armv8-R, the highest exception level is always EL2. This patch moves the initialization outside of the switch_el block and uses a new macro branch_if_not_highest_el which dynamically detects whether it is at the highest supported exception level. Linux's docs state that CNTFRQ_EL0 should be initialized by the bootloader. If not set, the the U-Boot prompt countdown hangs. Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com> |
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| arc | ||
| arm | ||
| m68k | ||
| microblaze | ||
| mips | ||
| nds32 | ||
| nios2 | ||
| powerpc | ||
| riscv | ||
| sandbox | ||
| sh | ||
| x86 | ||
| xtensa | ||
| .gitignore | ||
| Kconfig | ||
| u-boot-elf.lds | ||