powerpc/kernel/rtas.c

10 #define pr_fmt(fmt)	"rtas: " fmt
41 #include <asm/rtas-work-area.h>
42 #include <asm/rtas.h>
63  * @token: Value of @name if it exists under the /rtas node.
65  * @filter: If non-NULL, invoking this function via the rtas syscall is
486 		.name = "rtas-last-error",
567 	if (!rtas.dev)
674 	srr_regs_clobbered(); /* rtas uses SRRs, invalidate */
737 struct rtas_t rtas;
763 	if (!rtas.base)
804  * hardcode rtas.base/entry etc.
813 	if (!rtas.base)
832 	if (!rtas.base)
873 	if (!rtas.base)
878 		if ((root = of_find_node_by_path("/rtas"))) {
985 	if (rtas.dev == NULL)
995 	 * access non-function properties of the /rtas node. Warn and
1001 	tokp = of_get_property(rtas.dev, service, NULL);
1012  *  for all rtas calls that require an error buffer argument.
1013  *  This includes 'check-exception' and 'rtas-last-error'.
1022 	static const char propname[] __initconst = "rtas-error-log-max";
1025 	if (of_property_read_u32(rtas.dev, propname, &max)) {
1044  *  most recent failed call to rtas.  Because the error text
1045  *  might go stale if there are any other intervening rtas calls,
1223 	if (!rtas.entry || token == RTAS_UNKNOWN_SERVICE)
1244 	/* We use the global rtas args buffer */
1538 	indicators = of_get_property(rtas.dev, "rtas-indicators", &proplen);
1892 SYSCALL_DEFINE1(rtas, struct rtas_args __user *, uargs)
1904 	if (!rtas.entry)
2043 	for_each_property_of_node(rtas.dev, prop) {
2070 	/* Get RTAS dev node and fill up our "rtas" structure with infos
2073 	rtas.dev = of_find_node_by_name(NULL, "rtas");
2074 	if (!rtas.dev)
2077 	no_base = of_property_read_u32(rtas.dev, "linux,rtas-base", &base);
2078 	no_size = of_property_read_u32(rtas.dev, "rtas-size", &size);
2080 		of_node_put(rtas.dev);
2081 		rtas.dev = NULL;
2085 	rtas.base = base;
2086 	rtas.size = size;
2087 	no_entry = of_property_read_u32(rtas.dev, "linux,rtas-entry", &entry);
2088 	rtas.entry = no_entry ? rtas.base : entry;
2099 	ibm_extended_os_term = of_property_read_bool(rtas.dev, "ibm,extended-os-term");
2122 	if (depth != 1 || strcmp(uname, "rtas") != 0)
2125 	basep  = of_get_flat_dt_prop(node, "linux,rtas-base", NULL);
2126 	entryp = of_get_flat_dt_prop(node, "linux,rtas-entry", NULL);
2127 	sizep  = of_get_flat_dt_prop(node, "rtas-size", NULL);
2136 		rtas.base = *basep;
2137 		rtas.entry = *entryp;
2138 		rtas.size = *sizep;