rmodules: use rmodtool to create rmodules

Start using the rmodtool for generating rmodules.
rmodule_link() has been changed to create 2 rules:
one for the passed in <name>, the other for creating
<name>.rmod which is an ELF file in the format of
an rmodule.

Since the header is not compiled and linked together
with an rmodule there needs to be a way of marking
which symbol is the entry point. __rmodule_entry is
the symbol used for knowing the entry point. There
was a little churn in SMM modules to ensure an
rmodule entry point symbol takes a single argument.

Change-Id: Ie452ed866f6596bf13f137f5b832faa39f48d26e
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/5379
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)

1 files changed, 9 insertions, 3 deletions

diff --git a/src/include/cpu/x86/smm.h b/src/include/cpu/x86/smm.h
index 3ab43ff2ce..f63420fab5 100644
--- a/src/include/cpu/x86/smm.h
+++ b/src/include/cpu/x86/smm.h
@@ -517,14 +517,20 @@ struct smm_runtime {
 	u8 apic_id_to_cpu[CONFIG_MAX_CPUS];
 } __attribute__ ((packed));
 
-typedef void asmlinkage (*smm_handler_t)(void *arg, int cpu,
-                                         const struct smm_runtime *runtime);
+struct smm_module_params {
+	void *arg;
+	int cpu;
+	const struct smm_runtime *runtime;
+};
+
+/* smm_handler_t is called with arg of smm_module_params pointer. */
+typedef void asmlinkage (*smm_handler_t)(void *);
 
 #ifdef __SMM__
 /* SMM Runtime helpers. */
 
 /* Entry point for SMM modules. */
-void smm_handler_start(void *arg, int cpu, const struct smm_runtime *runtime);
+void asmlinkage smm_handler_start(void *params);
 
 /* Retrieve SMM save state for a given CPU. WARNING: This does not take into
  * account CPUs which are configured to not save their state to RAM. */