Implement a generic bhnd(4) device enumeration table API.

This defines a new bhnd_erom_if API, providing a common interface to device
enumeration on siba(4) and bcma(4) devices, for use both in the bhndb bridge
and SoC early boot contexts, and migrates mips/broadcom over to the new API.

This also replaces the previous adhoc device enumeration support implemented
for mips/broadcom.

Migration of bhndb to the new API will be implemented in a follow-up commit.


- Defined new bhnd_erom_if interface for bhnd(4) device enumeration, along
  with bcma(4) and siba(4)-specific implementations.
- Fixed a minor bug in bhndb that logged an error when we attempted to map the
  full siba(4) bus space (18000000-17FFFFFF) in the siba EROM parser.
- Reverted use of the resource's start address as the ChipCommon enum_addr in
  bhnd_read_chipid(). When called from bhndb, this address is found within the
  host address space, resulting in an invalid bridged enum_addr.
- Added support for falling back on standard bus_activate_resource() in
  bhnd_bus_generic_activate_resource(), enabling allocation of the bhnd_erom's
  bhnd_resource directly from a nexus-attached bhnd(4) device.
- Removed BHND_BUS_GET_CORE_TABLE(); it has been replaced by the erom API.
- Added support for statically initializing bhnd_erom instances, for use prior
  to malloc availability. The statically allocated buffer size is verified both
  at runtime, and via a compile-time assertion (see BHND_EROM_STATIC_BYTES).
- bhnd_erom classes are registered within a module via a linker set, allowing
  mips/broadcom to probe available EROM parser instances without creating a
  strong reference to bcma/siba-specific symbols.
- Migrated mips/broadcom to bhnd_erom_if, replacing the previous MIPS-specific
  device enumeration implementation.

Approved by:	adrian (mentor)
Differential Revision:	https://reviews.freebsd.org/D7748

5 files changed, 13 insertions, 5 deletions

diff --git a/sys/modules/bhnd/Makefile b/sys/modules/bhnd/Makefile
index 955565934734..9c99afd6eaa2 100644
--- a/sys/modules/bhnd/Makefile
+++ b/sys/modules/bhnd/Makefile
@@ -10,6 +10,9 @@ KMOD=	bhnd
 SRCS=	bhnd.c bhnd_subr.c
 SRCS+=	bhnd_bus_if.c bhnd_bus_if.h
 
+SRCS+=	bhnd_erom.c
+SRCS+=	bhnd_erom_if.c bhnd_erom_if.h
+
 # ChipCommon
 SRCS+=	chipc.c chipc_subr.c
 SRCS+=	bhnd_sprom_chipc.c \
diff --git a/sys/modules/bhnd/bcma/Makefile b/sys/modules/bhnd/bcma/Makefile
index 7071d859ab6f..59d1eb5f1413 100644
--- a/sys/modules/bhnd/bcma/Makefile
+++ b/sys/modules/bhnd/bcma/Makefile
@@ -5,6 +5,7 @@
 KMOD=	bcma
 SRCS=	bcma.c bcma_subr.c bcma_erom.c
 
-SRCS+=	device_if.h bus_if.h bhnd_bus_if.h
+SRCS+=	device_if.h bus_if.h
+SRCS+=	bhnd_bus_if.h bhnd_erom_if.h
 
 .include <bsd.kmod.mk>
diff --git a/sys/modules/bhnd/bcma_bhndb/Makefile b/sys/modules/bhnd/bcma_bhndb/Makefile
index 372a7ed0f6d2..e069cb5bdc30 100644
--- a/sys/modules/bhnd/bcma_bhndb/Makefile
+++ b/sys/modules/bhnd/bcma_bhndb/Makefile
@@ -5,7 +5,8 @@
 KMOD=	bcma_bhndb
 SRCS=	bcma_bhndb.c
 
-SRCS+=	bhnd_bus_if.h bhndb_bus_if.h bhndb_if.h
+SRCS+=	bhnd_bus_if.h bhnd_erom_if.h
+SRCS+=	bhndb_bus_if.h bhndb_if.h
 SRCS+=	device_if.h bus_if.h
 
 .include <bsd.kmod.mk>
diff --git a/sys/modules/bhnd/siba/Makefile b/sys/modules/bhnd/siba/Makefile
index 8ace993c04b6..0bf58e80a7c2 100644
--- a/sys/modules/bhnd/siba/Makefile
+++ b/sys/modules/bhnd/siba/Makefile
@@ -3,8 +3,10 @@
 .PATH:	${.CURDIR}/../../../dev/bhnd/siba
 
 KMOD=	siba
-SRCS=	siba.c siba_subr.c
+SRCS=	siba.c siba_subr.c \
+	siba_erom.c
 
-SRCS+=	device_if.h bus_if.h bhnd_bus_if.h
+SRCS+=	device_if.h bus_if.h
+SRCS+=	bhnd_bus_if.h bhnd_erom_if.h
 
 .include <bsd.kmod.mk>
diff --git a/sys/modules/bhnd/siba_bhndb/Makefile b/sys/modules/bhnd/siba_bhndb/Makefile
index ba46a7f46cf4..bd9e6c28e4ce 100644
--- a/sys/modules/bhnd/siba_bhndb/Makefile
+++ b/sys/modules/bhnd/siba_bhndb/Makefile
@@ -5,7 +5,8 @@
 KMOD=	siba_bhndb
 SRCS=	siba_bhndb.c
 
-SRCS+=	bhnd_bus_if.h bhndb_bus_if.h bhndb_if.h
+SRCS+=	bhnd_bus_if.h bhnd_erom_if.h
+SRCS+=	bhndb_bus_if.h bhndb_if.h
 SRCS+=	device_if.h bus_if.h
 
 .include <bsd.kmod.mk>