[src/trunk]: src/sys/sys Add slightly-more generalized version of the "of_com...

[thorpej <thorpej%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ae84b31ec440
branches:  trunk
changeset: 319973:ae84b31ec440
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Sun Jun 17 15:06:27 2018 +0000

description:
Add slightly-more generalized version of the "of_compat_data" structure
called "device_compatible_entry".  It performs a similar function, but
instead of one "compatible" string per entry, it takes an array of
"comaptible" strings per entry.  Also included are macros for initializing
an array of these entries and accessing data embedded in them.

diffstat:

 sys/sys/device.h |  25 ++++++++++++++++++++++++-
 1 files changed, 24 insertions(+), 1 deletions(-)

diffs (39 lines):

diff -r 09b28a8f88ba -r ae84b31ec440 sys/sys/device.h
--- a/sys/sys/device.h  Sun Jun 17 14:50:54 2018 +0000
+++ b/sys/sys/device.h  Sun Jun 17 15:06:27 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: device.h,v 1.151 2018/03/04 07:13:11 mlelstv Exp $ */
+/* $NetBSD: device.h,v 1.152 2018/06/17 15:06:27 thorpej Exp $ */
 
 /*
  * Copyright (c) 1996, 2000 Christopher G. Demetriou
@@ -123,6 +123,29 @@
 typedef struct cfattach *cfattach_t;
 
 #if defined(_KERNEL) || defined(_KMEMUSER)
+struct device_compatible_entry {
+       const char **   dce_compat_strings;
+       union {
+               uintptr_t dceu_val;
+               const void *dceu_ptr;
+       } dce_un;
+};
+#define        DEVICE_COMPAT_ENTRY_WITH_DATA(strings, opaque)                  \
+       { .dce_compat_strings = (strings),                              \
+         .dce_un.dceu_val = (uintptr_t)(opaque) }
+
+#define        DEVICE_COMPAT_ENTRY(strings)                                    \
+       DEVICE_COMPAT_ENTRY_WITH_DATA(strings, 0)
+
+#define        DEVICE_COMPAT_TERMINATOR                                        \
+       { .dce_compat_strings = NULL }
+
+#define        DEVICE_COMPAT_ENTRY_GET_STRINGS(_dce)   ((_dce)->dce_compat_strings)
+#define        DEVICE_COMPAT_ENTRY_GET_NUM(_dce)       ((_dce)->dce_un.dceu_val)
+#define        DEVICE_COMPAT_ENTRY_GET_PTR(_dce)       ((_dce)->dce_un.dceu_ptr)
+#define        DEVICE_COMPAT_ENTRY_IS_TERMINATOR(_dce)                         \
+       (((_dce) == NULL || (_dce)->dce_compat_strings == NULL) ? true : false)
+
 struct device_lock {
        int             dvl_nwait;
        int             dvl_nlock;