diff options
| author | Tom Rini <[email protected]> | 2025-10-01 14:30:52 -0600 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2025-10-10 14:25:24 -0600 |
| commit | 16bbc225fed7931988616ba4e223954ae5ccc06b (patch) | |
| tree | 52f02214484508f987e97e992655715961563aa8 /README | |
| parent | b30155c08e95550296668766bfd7d3da27c970fe (diff) | |
iotrace: Finish migrating this to Kconfig
When I migrated this to Kconfig in commit 68e54040ccc3 ("sandbox: Move
CONFIG_IO_TRACE to Kconfig") I didn't look hard enough for other
details. As explained in the README, this is valid for ARM too. So start
by making this be a prompted question and CMD_IOTRACE depend on IO_TRACE
being enabled. Next, migrate the information out of README and in to
the appropriate help text for existing options in Kconfig. Finally, make
this option be default y on SANDBOX but not selected as it's valid to
build without it.
Signed-off-by: Tom Rini <[email protected]>
Diffstat (limited to 'README')
| -rw-r--r-- | README | 22 |
1 files changed, 0 insertions, 22 deletions
@@ -300,28 +300,6 @@ The following options need to be configured: Note that if the GPIO device uses I2C, then the I2C interface must also be configured. See I2C Support, below. -- I/O tracing: - When CONFIG_IO_TRACE is selected, U-Boot intercepts all I/O - accesses and can checksum them or write a list of them out - to memory. See the 'iotrace' command for details. This is - useful for testing device drivers since it can confirm that - the driver behaves the same way before and after a code - change. Currently this is supported on sandbox and arm. To - add support for your architecture, add '#include <iotrace.h>' - to the bottom of arch/<arch>/include/asm/io.h and test. - - Example output from the 'iotrace stats' command is below. - Note that if the trace buffer is exhausted, the checksum will - still continue to operate. - - iotrace is enabled - Start: 10000000 (buffer start address) - Size: 00010000 (buffer size) - Offset: 00000120 (current buffer offset) - Output: 10000120 (start + offset) - Count: 00000018 (number of trace records) - CRC32: 9526fb66 (CRC32 of all trace records) - - Timestamp Support: When CONFIG_TIMESTAMP is selected, the timestamp |