Add basic support for FDT to i386 & amd64. This change includes:

1.  Common headers for fdt.h and ofw_machdep.h under x86/include
    with indirections under i386/include and amd64/include.
2.  New modinfo for loader provided FDT blob.
3.  Common x86_init_fdt() called from hammer_time() on amd64 and
    init386() on i386.
4.  Split-off FDT specific low-level console functions from FDT
    bus methods for the uart(4) driver. The low-level console
    logic has been moved to uart_cpu_fdt.c and is used for arm,
    mips & powerpc only. The FDT bus methods are shared across
    all architectures.
5.  Add dev/fdt/fdt_x86.c to hold the fdt_fixup_table[] and the
    fdt_pic_table[] arrays. Both are empty right now.

FDT addresses are I/O ports on x86. Since the core FDT code does
not handle different address spaces, adding support for both I/O
ports and memory addresses requires some thought and discussion.
It may be better to use a compile-time option that controls this.

Obtained from:	Juniper Networks, Inc.

4 files changed, 21 insertions, 0 deletions

diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c
index a543421..bc336e9 100644
--- a/sys/amd64/amd64/machdep.c
+++ b/sys/amd64/amd64/machdep.c
@@ -53,6 +53,7 @@ __FBSDID("$FreeBSD$");
 #include "opt_maxmem.h"
 #include "opt_mp_watchdog.h"
 #include "opt_perfmon.h"
+#include "opt_platform.h"
 #include "opt_sched.h"
 #include "opt_kdtrace.h"
 
@@ -133,6 +134,9 @@ __FBSDID("$FreeBSD$");
 #ifdef SMP
 #include <machine/smp.h>
 #endif
+#ifdef FDT
+#include <x86/fdt.h>
+#endif
 
 #ifdef DEV_ATPIC
 #include <x86/isa/icu.h>
@@ -1886,6 +1890,10 @@ hammer_time(u_int64_t modulep, u_int64_t physfree)
 
 	cpu_probe_amdc1e();
 
+#ifdef FDT
+	x86_init_fdt();
+#endif
+
 	/* Location of kernel stack for locore */
 	return ((u_int64_t)thread0.td_pcb);
 }
diff --git a/sys/amd64/include/fdt.h b/sys/amd64/include/fdt.h
new file mode 100644
index 0000000..1a03514
--- /dev/null
+++ b/sys/amd64/include/fdt.h
@@ -0,0 +1,6 @@
+/*-
+ * This file is in the public domain.
+ */
+/* $FreeBSD$ */
+
+#include <x86/fdt.h>
diff --git a/sys/amd64/include/metadata.h b/sys/amd64/include/metadata.h
index 4c7ec9e..73c9207 100644
--- a/sys/amd64/include/metadata.h
+++ b/sys/amd64/include/metadata.h
@@ -31,5 +31,6 @@
 
 #define	MODINFOMD_SMAP		0x1001
 #define	MODINFOMD_SMAP_XATTR	0x1002
+#define	MODINFOMD_DTBP		0x1003
 
 #endif /* !_MACHINE_METADATA_H_ */
diff --git a/sys/amd64/include/ofw_machdep.h b/sys/amd64/include/ofw_machdep.h
new file mode 100644
index 0000000..4457f85
--- /dev/null
+++ b/sys/amd64/include/ofw_machdep.h
@@ -0,0 +1,6 @@
+/*-
+ * This file is in the public domain.
+ */
+/* $FreeBSD$ */
+
+#include <x86/ofw_machdep.h>