program loading: add prog_run() function

The prog_run() function abstracts away what is required
for running a given program. Within it, there are 2
calls: 1. platform_prog_run() and 2. arch_prog_run().
The platform_prog_run() allows for a chipset to intercept
a program that will be run. This allows for CPU switching
as currently needed in t124 and t132.

Change-Id: I22a5dd5bfb1018e7e46475e47ac993a0941e2a8c
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/8846
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Reviewed-by: Marc Jones <marc.jones@se-eng.com>

src/lib/Makefile.inc

@@ -18,7 +18,7 @@
 #
 subdirs-y += loaders
 
-bootblock-y += arch_ops.c
+bootblock-y += prog_ops.c
 bootblock-y += cbfs.c cbfs_core.c
 bootblock-$(CONFIG_COMMON_CBFS_SPI_WRAPPER) += cbfs_spi.c
 
@@ -26,7 +26,7 @@ bootblock-$(CONFIG_CONSOLE_CBMEM) += cbmem_console.c
 bootblock-y += memchr.c
 bootblock-y += memcmp.c
 
-verstage-y += arch_ops.c
+verstage-y += prog_ops.c
 verstage-y += delay.c
 verstage-y += cbfs.c
 verstage-y += memcmp.c
@@ -35,7 +35,7 @@ verstage-$(CONFIG_COMMON_CBFS_SPI_WRAPPER) += cbfs_spi.c
 verstage-y += tlcl.c
 verstage-$(CONFIG_GENERIC_UDELAY) += timer.c
 
-romstage-y += arch_ops.c
+romstage-y += prog_ops.c
 romstage-y += memchr.c
 romstage-y += memcmp.c
 $(foreach arch,$(ARCH_SUPPORTED),\
@@ -60,7 +60,7 @@ romstage-$(CONFIG_ARCH_ROMSTAGE_X86_32) += gcc.c
 ramstage-$(CONFIG_ARCH_RAMSTAGE_X86_32) += gcc.c
 endif
 
-ramstage-y += arch_ops.c
+ramstage-y += prog_ops.c
 ramstage-y += hardwaremain.c
 ramstage-y += selfboot.c
 ramstage-y += coreboot_table.c

src/lib/loaders/load_and_run_payload.c

@@ -83,7 +83,7 @@ out:
 
 void payload_run(void)
 {
-	const struct payload *payload = &global_payload;
+	struct payload *payload = &global_payload;
 
 	/* Reset to booting from this image as late as possible */
 	boot_successful();

src/lib/loaders/load_and_run_ramstage.c

@@ -48,7 +48,7 @@ load_ramstage(const struct ramstage_loader_ops *ops,
 
 	timestamp_add_now(TS_END_COPYRAM);
 
-	stage_exit(prog_entry(ramstage));
+	prog_run(ramstage);
 }
 
 static void run_ramstage_from_resume(struct romstage_handoff *handoff,
@@ -60,7 +60,7 @@ static void run_ramstage_from_resume(struct romstage_handoff *handoff,
 
 		if (prog_entry(ramstage) != NULL) {
 			printk(BIOS_DEBUG, "Jumping to image.\n");
-			stage_exit(prog_entry(ramstage));
+			prog_run(ramstage);
 		}
 	}
 }

src/lib/loaders/load_and_run_romstage.c

@@ -38,5 +38,5 @@ void run_romstage(void)
 		halt();
 	}
 
-	stage_exit(prog_entry(&romstage));
+	prog_run(&romstage);
 }

src/lib/prog_ops.c

@@ -26,3 +26,14 @@ void __attribute__ ((weak)) arch_segment_loaded(uintptr_t start, size_t size,
 {
 	/* do nothing */
 }
+
+void prog_run(struct prog *prog)
+{
+	platform_prog_run(prog);
+	arch_prog_run(prog);
+}
+
+void __attribute__ ((weak)) platform_prog_run(struct prog *prog)
+{
+	/* do nothing */
+}