On Fri, Sep 04, 2020 at 09:51:21PM +0530, Anup Patel wrote: > The TIME CSR is usually not present on most RISC-V systems so the > M-mode firmware will emulate the TIME CSR for the S-mode (MMU) kernel > whereas the M-mode (NoMMU) kernel will have to use MMIO clocksource. > > Currently, the get_cycles() implementation in asm/timex.h does not > consider the above fact so we provide alternate implementation of > the get_cycles() for the M-mode (NoMMU) kernel which expects drivers > to provide custom MMIO based read_cycles64() method.
Please just go back to the previous working version without all the crazy indirections. The whole timer and irq code has been turned into a giant maze of indirections lately.
