program loading: provide one cache maintenance callback

Instead of having 2 different functions to call when a program
is loaded provide a single callback with flags parameter. The
previous callbacks for cache management routines did this:

for_each_program_segment:
	arch_program_segment_loaded(start, size);
arch_program_loaded();

Now, use one callback instead:
for_each_program_segment:
	arch_segment_loaded(start, size, SEG_FINAL?);

Change-Id: I3811cba92e3355d172f605e4444f053321b07a2a
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/8838
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/include/program_loading.h

@@ -23,11 +23,15 @@
 #include <stdint.h>
 #include <stddef.h>
 
-/* For each segment of a program loaded this function is called*/
-void arch_program_segment_loaded(uintptr_t start, size_t size);
+enum {
+	/* Last segment of program. Can be used to take different actions for
+	 * cache maintenance of a program load. */
+	SEG_FINAL = 1 << 0,
+};
 
-/* Upon completion of loading a program this function is called */
-void arch_program_loaded(void);
+/* Called for each segment of a program loaded. The PROG_FLAG_FINAL will be
+ * set on the last segment loaded. */
+void arch_segment_loaded(uintptr_t start, size_t size, int flags);
 
 /************************
  *   ROMSTAGE LOADING   *

src/lib/arch_ops.c

@@ -2,6 +2,7 @@
  * This file is part of the coreboot project.
  *
  * Copyright (C) 2014 Imagination Technologies
+ * Copyright 2015 Google Inc.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -20,14 +21,9 @@
 #include <program_loading.h>
 
 /* For each segment of a program loaded this function is called*/
-__attribute__ ((weak)) void arch_program_segment_loaded(uintptr_t start,
-							size_t size)
+void __attribute__ ((weak)) arch_segment_loaded(uintptr_t start, size_t size,
+						int flags)
 {
 	/* do nothing */
 }
 
-/* Upon completion of loading a program this function is called */
-__attribute__ ((weak)) void arch_program_loaded(void)
-{
-	/* do nothing */
-}

src/lib/cbfs.c

@@ -112,8 +112,7 @@ void *cbfs_load_stage_by_offset(struct cbfs_media *media, ssize_t offset)
 		media->unmap(media, data);
 	}
 
-	arch_program_segment_loaded(stage.load, stage.memlen);
-	arch_program_loaded();
+	arch_segment_loaded(stage.load, stage.memlen, SEG_FINAL);
 	DEBUG("stage loaded\n");
 
 	return (void *)(uintptr_t)stage.entry;

src/lib/rmodule.c

@@ -200,9 +200,8 @@ int rmodule_load(void *base, struct rmodule *module)
 		return -1;
 	rmodule_clear_bss(module);
 
-	arch_program_segment_loaded((uintptr_t)module->location,
-					rmodule_memory_size(module));
-	arch_program_loaded();
+	arch_segment_loaded((uintptr_t)module->location,
+				rmodule_memory_size(module), SEG_FINAL);
 
 	return 0;
 }

src/lib/selfboot.c

@@ -314,9 +314,16 @@ static int load_self_segments(
 	struct payload *payload)
 {
 	struct segment *ptr;
+	struct segment *last_non_empty;
 	const unsigned long one_meg = (1UL << 20);
 	unsigned long bounce_high = lb_end;
 
+	/* Determine last non-empty loaded segment. */
+	last_non_empty = NULL;
+	for(ptr = head->next; ptr != head; ptr = ptr->next)
+		if (ptr->s_filesz != 0)
+			last_non_empty = ptr;
+
 	for(ptr = head->next; ptr != head; ptr = ptr->next) {
 		if (bootmem_region_targets_usable_ram(ptr->s_dstaddr,
 							ptr->s_memsz))
@@ -442,17 +449,11 @@ static int load_self_segments(
 			 * Each architecture can perform additonal operations
 			 * on the loaded segment
 			 */
-			arch_program_segment_loaded((uintptr_t)dest,
-							ptr->s_memsz);
+			arch_segment_loaded((uintptr_t)dest, ptr->s_memsz,
+					last_non_empty == ptr ? SEG_FINAL : 0);
 		}
 	}
 
-	/*
-	 * Each architecture can perform additonal operations once the entire
-	 * program is loaded
-	 */
-	arch_program_loaded();
-
 	return 1;
 }