[OpenBIOS] [PATCH v3 3/5] Pretty-print reg property

[Segher Boessenkool]

> Executing .properties for, e.g., the /memory node would print the
> "reg" property as a series of bytes.
>
> Visualize the "reg" format as a table.
>
> v3:
> * Optimization, based on code suggested by Segher.
>
> v2:
> * Use my-#acells for address size.
> * Introduce my-#scells for size size.
>
> Cc: Segher Boessenkool <segher at kernel.crashing.org>
> Signed-off-by: Andreas Färber <andreas.faerber at web.de>

Acked-by: Segher Boessenkool <segher at kernel.crashing.org>

(assuming you tested it :-) )

> ---
>  forth/admin/devices.fs   |   24 ++++++++++++++++++++++++
>  forth/device/property.fs |   14 ++++++++++++++
>  2 files changed, 38 insertions(+), 0 deletions(-)
>
> diff --git a/forth/admin/devices.fs b/forth/admin/devices.fs
> index 33ad0de..93f306c 100644
> --- a/forth/admin/devices.fs
> +++ b/forth/admin/devices.fs
> @@ -304,8 +304,32 @@
>    2drop ." <unimplemented type>"
>  ;
>
> +\ Print the value of a property in "reg" format
> +: .p-reg ( data len -- )
> +  2dup + -rot ( data+len data len )
> +  >r >r my-#scells 4 * my-#acells 4 * dup r> r>
> +  ( data+len #sbytes #abytes #abytes data len )
> +  bounds ( data+len #sbytes #abytes #abytes data+len data ) ?do
> +    dup 0= if 2 spaces then		\ start of "size" part
> +	2dup <> if
> +      dup 3 and 0= if space then	\ make numbers more readable
> +	then
> +    i c@ 2 0.r					\ print byte
> +    1- 3dup nip ( data+len #sbytes #abytes n #sbytes n ) + 0= if
> +      3 pick i 1+ > if
> +        cr						\ start new line
> +        d# 26 spaces			\ indentation
> +      then
> +      drop dup					\ update counter
> +    then
> +  loop
> +  3drop drop
> +;
> +
>  \ This function hardwires data formats to particular node properties
>  : (.property-by-name) ( name-str name-len data len -- )
> +  2over " reg" strcmp 0= if .p-reg 2drop exit then
> +
>    2swap 2drop ( data len )
>    (.property)
>  ;
> diff --git a/forth/device/property.fs b/forth/device/property.fs
> index 285113b..fb529a5 100644
> --- a/forth/device/property.fs
> +++ b/forth/device/property.fs
> @@ -157,6 +157,20 @@
>    then
>  ;
>
> +\ HELPER: get #size-cells value (from parent)
> +\ Legal values are 1..4 (we may optionally support larger sizes)
> +: my-#scells ( -- #size-cells )
> +  my-self ?dup if >in.device-node @ else active-package then
> +  ?dup if >dn.parent @ then
> +  ?dup if
> +    " #size-cells" rot get-package-property if 1 exit then
> +    \ we don't have to support more than 4 (and 0 is illegal)
> +    decode-int nip nip 4 min 1 max
> +  else
> +    1
> +  then
> +;
> +
>  : decode-string ( prop-addr1 prop-len1 -- prop-addr2 prop-len2 str len )
>    dup 0> if
>      2dup bounds \ check property for 0 bytes
> --
> 1.7.3
>