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| author | Stewart Smith <stewart@linux.vnet.ibm.com> | 2015-03-17 16:21:28 +1100 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2015-03-17 16:32:36 +1100 |
| commit | 1988e48f3726833712764e15b300961e4f305533 (patch) | |
| tree | 47350b47bd84581b9c8dc80fd4586c69ae423534 /doc | |
| parent | 88688d382533fb3cfb1422050481862afd6534df (diff) | |
| download | talos-skiboot-1988e48f3726833712764e15b300961e4f305533.tar.gz talos-skiboot-1988e48f3726833712764e15b300961e4f305533.zip | |
Add basic OPAL_XSCOM_READ and OPAL_XSCOM_WRITE docs
Intentionally lazy as lazy docs are better than no docs.
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/opal-api/opal-xscom-read-write-65-66.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/doc/opal-api/opal-xscom-read-write-65-66.txt b/doc/opal-api/opal-xscom-read-write-65-66.txt new file mode 100644 index 00000000..92916df2 --- /dev/null +++ b/doc/opal-api/opal-xscom-read-write-65-66.txt @@ -0,0 +1,12 @@ +OPAL_XSCOM_READ and OPAL_XSCOM_WRITE +------------------------------------ + +These low level calls will read/write XSCOM values directly. + +They should only be used by low level manufacturing/debug tools. +"Normal" host OS kernel code should not know about XSCOM. + +each takes three parameters: + +int xscom_read(uint32_t partid, uint64_t pcb_addr, uint64_t *val) +int xscom_write(uint32_t partid, uint64_t pcb_addr, uint64_t val) |
