[coreboot-gerrit] Change in coreboot[master]: [WIP]arch/arm: Allow program loading of Linux kernels

[Arthur Heymans (Code Review)]

Arthur Heymans has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/35409 )

Change subject: [WIP]arch/arm: Allow program loading of Linux kernels
......................................................................

[WIP]arch/arm: Allow program loading of Linux kernels

On ARM the linux kernel takes 3 arguments:
    r0 = 0
    r1 = machine_type  (0xffffffff if using FDT)
    r2 = &fdt

To allow this, a function with a different signature needs to be used
when using a FIT payload.

Change-Id: Ie0dcc26d647941de71669345911ba288341b834b
Signed-off-by: Arthur Heymans 
---
M src/arch/arm/boot.c
1 file changed, 16 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/09/35409/1

diff --git a/src/arch/arm/boot.c b/src/arch/arm/boot.c
index 9d1e4cd..fd7ba68 100644
--- a/src/arch/arm/boot.c
+++ b/src/arch/arm/boot.c
@@ -11,15 +11,29 @@
  * GNU General Public License for more details.
  */

+#include <cbfs.h>
 #include <arch/cache.h>
 #include <program_loading.h>

void arch_prog_run(struct prog *prog)
 {
    void (*doit)(void *);
+	void (*doit_3)(void *, void *, void *);
+	char *program_arg = prog_entry_arg(prog);

cache_sync_instructions();

-	doit = prog_entry(prog);
-	doit(prog_entry_arg(prog));
+	/* The Linux kernel takes 3 dword's as argument */
+	switch (prog_cbfs_type(prog)) {
+	case CBFS_TYPE_FIT: /* Flattened image tree */
+		if (CONFIG(PAYLOAD_FIT_SUPPORT)) {
+			doit_3 = prog_entry(prog);
+			doit_3((void *)program_arg, (void *)(program_arg + sizeof(void *)),
+			       (void *)(program_arg + 2 * sizeof(void *)));
+			break;
+		} /* else fall-through */
+	default:
+		doit = prog_entry(prog);
+		doit((void *)program_arg);
+	}
 }