[PATCH v5 06/11] hw/arm: Load -bios image as a boot ROM for npcm7xx

[Havard Skinnemoen <hskinnemoen@google.com>]

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

Reviewed-by: Tyrone Ting <kfting@nuvoton.com>
Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
---
 hw/arm/npcm7xx_boards.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/hw/arm/npcm7xx_boards.c b/hw/arm/npcm7xx_boards.c
index d78d9f991b..80cf1535f1 100644
--- a/hw/arm/npcm7xx_boards.c
+++ b/hw/arm/npcm7xx_boards.c
@@ -19,8 +19,11 @@
 #include "hw/arm/boot.h"
 #include "hw/arm/npcm7xx.h"
 #include "hw/core/cpu.h"
+#include "hw/loader.h"
 #include "qapi/error.h"
+#include "qemu-common.h"
 #include "qemu/units.h"
+#include "sysemu/sysemu.h"
 
 #define NPCM750_EVB_POWER_ON_STRAPS 0x00001ff7
 #define QUANTA_GSJ_POWER_ON_STRAPS 0x00001fff
@@ -34,6 +37,25 @@ static struct arm_boot_info npcm7xx_binfo = {
     .board_id           = -1,
 };
 
+static void npcm7xx_load_bootrom(NPCM7xxState *soc)
+{
+    if (bios_name) {
+        g_autofree char *filename = NULL;
+        int ret;
+
+        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
+        if (!filename) {
+            error_report("Could not find ROM image '%s'", bios_name);
+            exit(1);
+        }
+        ret = load_image_mr(filename, &soc->irom);
+        if (ret < 0) {
+            error_report("Failed to load ROM image '%s'", filename);
+            exit(1);
+        }
+    }
+}
+
 static void npcm7xx_load_kernel(MachineState *machine, NPCM7xxState *soc)
 {
     NPCM7xxClass *sc = NPCM7XX_GET_CLASS(soc);
@@ -73,6 +95,7 @@ static void npcm750_evb_init(MachineState *machine)
     npcm7xx_connect_dram(soc, machine->ram);
     qdev_realize(DEVICE(soc), NULL, &error_abort);
 
+    npcm7xx_load_bootrom(soc);
     npcm7xx_load_kernel(machine, soc);
 }
 
@@ -84,6 +107,7 @@ static void quanta_gsj_init(MachineState *machine)
     npcm7xx_connect_dram(soc, machine->ram);
     qdev_realize(DEVICE(soc), NULL, &error_abort);
 
+    npcm7xx_load_bootrom(soc);
     npcm7xx_load_kernel(machine, soc);
 }
 
-- 
2.27.0.383.g050319c2ae-goog