From 04d414090c71f986b54838f791430fabaa57ca7c Mon Sep 17 00:00:00 2001
From: Steven Stallion <sstallion@gmail.com>
Date: Wed, 20 Mar 2013 06:31:35 +0000
Subject: [PATCH] image: Add support for Plan 9

Signed-off-by: Steven Stallion <sstallion@gmail.com>
Cc: Tom Rini <trini@ti.com>
Reviewed-by: Tom Rini <trini@ti.com>
---
 common/cmd_bootm.c        | 39 +++++++++++++++++++++++++++++++++++++++
 common/image.c            |  1 +
 include/config_defaults.h |  1 +
 include/image.h           |  1 +
 4 files changed, 42 insertions(+)

diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index 5d2ce00..7438469 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -128,6 +128,9 @@ static boot_os_fn do_bootm_rtems;
 #if defined(CONFIG_BOOTM_OSE)
 static boot_os_fn do_bootm_ose;
 #endif
+#if defined(CONFIG_BOOTM_PLAN9)
+static boot_os_fn do_bootm_plan9;
+#endif
 #if defined(CONFIG_CMD_ELF)
 static boot_os_fn do_bootm_vxworks;
 static boot_os_fn do_bootm_qnxelf;
@@ -154,6 +157,9 @@ static boot_os_fn *boot_os[] = {
 #if defined(CONFIG_BOOTM_OSE)
 	[IH_OS_OSE] = do_bootm_ose,
 #endif
+#if defined(CONFIG_BOOTM_PLAN9)
+	[IH_OS_PLAN9] = do_bootm_plan9,
+#endif
 #if defined(CONFIG_CMD_ELF)
 	[IH_OS_VXWORKS] = do_bootm_vxworks,
 	[IH_OS_QNX] = do_bootm_qnxelf,
@@ -1628,6 +1634,39 @@ static int do_bootm_ose(int flag, int argc, char * const argv[],
 }
 #endif /* CONFIG_BOOTM_OSE */
 
+#if defined(CONFIG_BOOTM_PLAN9)
+static int do_bootm_plan9(int flag, int argc, char * const argv[],
+			   bootm_headers_t *images)
+{
+	void (*entry_point)(void);
+
+	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
+		return 1;
+
+#if defined(CONFIG_FIT)
+	if (!images->legacy_hdr_valid) {
+		fit_unsupported_reset("Plan 9");
+		return 1;
+	}
+#endif
+
+	entry_point = (void (*)(void))images->ep;
+
+	printf("## Transferring control to Plan 9 (at address %08lx) ...\n",
+		(ulong)entry_point);
+
+	bootstage_mark(BOOTSTAGE_ID_RUN_OS);
+
+	/*
+	 * Plan 9 Parameters:
+	 *   None
+	 */
+	(*entry_point)();
+
+	return 1;
+}
+#endif /* CONFIG_BOOTM_PLAN9 */
+
 #if defined(CONFIG_CMD_ELF)
 static int do_bootm_vxworks(int flag, int argc, char * const argv[],
 			     bootm_headers_t *images)
diff --git a/common/image.c b/common/image.c
index 6afbb40..60c2127 100644
--- a/common/image.c
+++ b/common/image.c
@@ -108,6 +108,7 @@ static const table_entry_t uimage_os[] = {
 #endif
 	{	IH_OS_NETBSD,	"netbsd",	"NetBSD",		},
 	{	IH_OS_OSE,	"ose",		"Enea OSE",		},
+	{	IH_OS_PLAN9,	"plan9",	"Plan 9",		},
 	{	IH_OS_RTEMS,	"rtems",	"RTEMS",		},
 	{	IH_OS_U_BOOT,	"u-boot",	"U-Boot",		},
 #if defined(CONFIG_CMD_ELF) || defined(USE_HOSTCC)
diff --git a/include/config_defaults.h b/include/config_defaults.h
index d023c63..567b46c 100644
--- a/include/config_defaults.h
+++ b/include/config_defaults.h
@@ -12,6 +12,7 @@
 /* Support bootm-ing different OSes */
 #define CONFIG_BOOTM_LINUX 1
 #define CONFIG_BOOTM_NETBSD 1
+#define CONFIG_BOOTM_PLAN9 1
 #define CONFIG_BOOTM_RTEMS 1
 
 #define CONFIG_GZIP 1
diff --git a/include/image.h b/include/image.h
index 8e285f9..4ad0e6b 100644
--- a/include/image.h
+++ b/include/image.h
@@ -84,6 +84,7 @@
 #define IH_OS_UNITY		20	/* Unity OS	*/
 #define IH_OS_INTEGRITY		21	/* INTEGRITY	*/
 #define IH_OS_OSE		22	/* OSE		*/
+#define IH_OS_PLAN9		23	/* Plan 9	*/
 
 /*
  * CPU Architecture Codes (supported by Linux)