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Add a new function (OF_getencprop()) that undoes the transformation applied

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by encode-int. Specifically, it takes a set of 32-bit cell values and
changes them to host byte order. Most non-string instances of OF_getprop()
should be using this function, which is a no-op on big-endian platforms.
This commit is contained in:
Nathan Whitehorn 2013-10-22 20:57:24 +00:00
parent c40ecff1b2
commit 29fdf9ef00
2 changed files with 18 additions and 0 deletions
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16
sys/dev/ofw/openfirm.c
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@ -64,6 +64,7 @@ __FBSDID("$FreeBSD$");
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/endian.h>
#include <machine/stdarg.h>
@ -280,6 +281,21 @@ OF_getprop(phandle_t package, const char *propname, void *buf, size_t buflen)
return (OFW_GETPROP(ofw_obj, package, propname, buf, buflen));
}
ssize_t
OF_getencprop(phandle_t node, const char *propname, pcell_t *buf, size_t len)
{
ssize_t retval;
int i;
KASSERT(len % 4 == 0, "Need a multiple of 4 bytes");
retval = OF_getprop(node, propname, buf, len);
for (i = 0; i < len/4; i++)
buf[i] = be32toh(buf[i]);
return (retval);
}
/*
* Recursively search the node and its parent for the given property, working
* downward from the node to the device tree root. Returns the value of the

2
sys/dev/ofw/openfirm.h
View File

@ -105,6 +105,8 @@ phandle_t OF_parent(phandle_t node);
ssize_t OF_getproplen(phandle_t node, const char *propname);
ssize_t OF_getprop(phandle_t node, const char *propname, void *buf,
size_t len);
ssize_t OF_getencprop(phandle_t node, const char *prop, pcell_t *buf,
size_t len); /* Same as getprop, but maintains endianness */
int OF_hasprop(phandle_t node, const char *propname);
ssize_t OF_searchprop(phandle_t node, const char *propname, void *buf,
size_t len);