This series add a support of tracing for RISC-V arch.
This series is also available here [1] for testing. [1] https://github.com/pragnesh26992/u-boot/tree/trace
How to test this patch: 1) Enable tracing in "configs/sifive_fu540_defconfig" CONFIG_TRACE=y CONFIG_TRACE_BUFFER_SIZE=0x01000000 CONFIG_TRACE_CALL_DEPTH_LIMIT=15 CONFIG_CMD_TRACE=y
2) make FTRACE=1 sifive_fu540_defconfig 3) make FTRACE=1
Following are the boot messages on FU540 five cores SMP platform:
U-Boot SPL 2021.01-rc1-00244-gc0ac5b69ea-dirty (Nov 05 2020 - 15:21:06 +0530) Trying to boot from MMC1
U-Boot 2021.01-rc1-00244-gc0ac5b69ea-dirty (Nov 05 2020 - 15:21:06 +0530)
CPU: rv64imafdc Model: SiFive HiFive Unleashed A00 DRAM: 8 GiB trace: enabled MMC: spi@10050000:mmc@0: 0 *** Warning - bad CRC, using default environment
In: serial@10010000 Out: serial@10010000 Err: serial@10010000 Board serial number should not be 0 !! Net: Error: ethernet@10090000 address not set. No ethernet found.
Hit any key to stop autoboot: 0 => trace stats 178,556 function sites 9,378,800 function calls 1 untracked function calls 1,279,056 traced function calls (8070507 dropped due to overflow) 19 maximum observed call depth 15 call depth limit 9,568,845 calls not traced due to depth => trace calls 0x83000000 0xf00000 Call list dumped to 83000000, size 0xea33d0 =>
Pragnesh Patel (1): riscv: Add timer_get_us() for tracing
drivers/timer/andes_plmt_timer.c | 16 +++++++++++++++- drivers/timer/riscv_timer.c | 14 +++++++++++++- drivers/timer/sifive_clint_timer.c | 16 +++++++++++++++- 3 files changed, 43 insertions(+), 3 deletions(-)