[PATCH v2 07/12] hw/arm: Load -bios image as a boot ROM for npcm7xx

[Havard Skinnemoen]

If a -bios option is specified on the command line, load the image into
the internal ROM memory region, which contains the first instructions
run by the CPU after reset.

A minimal Apache-2.0-licensed boot ROM can be found at

https://github.com/google/vbootrom

It is by no means feature complete, but it is enough to launch the
Nuvoton bootblock[1] from offset 0 in the flash, which in turn will
launch u-boot and finally the Linux kernel.

[1] https://github.com/Nuvoton-Israel/bootblock

Change-Id: I41eae4fc7786d33f532c14087e930bf1b5012562
Reviewed-by: Tyrone Ting <kfting@nuvoton.com>
Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
---
 hw/arm/npcm7xx.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/hw/arm/npcm7xx.c b/hw/arm/npcm7xx.c
index a5dbf08c00..417bc16b5c 100644
--- a/hw/arm/npcm7xx.c
+++ b/hw/arm/npcm7xx.c
@@ -22,6 +22,7 @@
 #include "hw/misc/unimp.h"
 #include "hw/qdev-properties.h"
 #include "qapi/error.h"
+#include "qemu-common.h"
 #include "qemu/units.h"
 #include "sysemu/sysemu.h"
 
@@ -270,6 +271,22 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
     }
     memory_region_add_subregion(get_system_memory(), NPCM7XX_ROM_BA, &s->irom);
 
+    if (bios_name) {
+        g_autofree char *filename = NULL;
+        int ret;
+
+        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
+        if (!filename) {
+            error_setg(errp, "Could not find ROM image '%s'", bios_name);
+            return;
+        }
+        ret = load_image_mr(filename, &s->irom);
+        if (ret < 0) {
+            error_setg(errp, "Failed to load ROM image '%s'", filename);
+            return;
+        }
+    }
+
     /* External DDR4 SDRAM */
     memory_region_add_subregion(get_system_memory(), NPCM7XX_DRAM_BA, s->dram);
 }
-- 
2.27.0.290.gba653c62da-goog