powerpc: add Freescale hypervisor partition control functions

Add functions to restart and halt the current partition when running under
the Freescale hypervisor.  These functions should be assigned to various
function pointers of the ppc_md structure during the .probe() function for
the board:

	ppc_md.restart = fsl_hv_restart;
	ppc_md.power_off = fsl_hv_halt;
	ppc_md.halt = fsl_hv_halt;

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/sysdev/fsl_soc.c

@@ -41,6 +41,7 @@
 #include <sysdev/fsl_soc.h>
 #include <mm/mmu_decl.h>
 #include <asm/cpm2.h>
+#include <asm/fsl_hcalls.h>	/* For the Freescale hypervisor */
 
 extern void init_fcc_ioports(struct fs_platform_info*);
 extern void init_fec_ioports(struct fs_platform_info*);
@@ -252,3 +253,29 @@ void fsl_rstcr_restart(char *cmd)
 struct platform_diu_data_ops diu_ops;
 EXPORT_SYMBOL(diu_ops);
 #endif
+
+/*
+ * Restart the current partition
+ *
+ * This function should be assigned to the ppc_md.restart function pointer,
+ * to initiate a partition restart when we're running under the Freescale
+ * hypervisor.
+ */
+void fsl_hv_restart(char *cmd)
+{
+	pr_info("hv restart\n");
+	fh_partition_restart(-1);
+}
+
+/*
+ * Halt the current partition
+ *
+ * This function should be assigned to the ppc_md.power_off and ppc_md.halt
+ * function pointers, to shut down the partition when we're running under
+ * the Freescale hypervisor.
+ */
+void fsl_hv_halt(void)
+{
+	pr_info("hv exit\n");
+	fh_partition_stop(-1);
+}

arch/powerpc/sysdev/fsl_soc.h

@@ -36,5 +36,8 @@ struct platform_diu_data_ops {
 extern struct platform_diu_data_ops diu_ops;
 #endif
 
+void fsl_hv_restart(char *cmd);
+void fsl_hv_halt(void);
+
 #endif
 #endif