[v4,07/12] hw/arm: Load -bios image as a boot ROM for npcm7xx

Commit Message

Havard Skinnemoen July 7, 2020, 6:47 p.m. UTC

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 <[e-mail]>
Signed-off-by: Havard Skinnemoen <[e-mail]>
---
 hw/arm/npcm7xx_boards.c | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

Patch

diff --git a/hw/arm/npcm7xx_boards.c b/hw/arm/npcm7xx_boards.c
index 205243cde6..de2d2ca786 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);
@@ -66,7 +88,7 @@  static void npcm750_evb_init(MachineState *machine)
     NPCM7xxState *soc;
 
     soc = npcm7xx_create_soc(machine, NPCM750_EVB_POWER_ON_STRAPS);
-
+    npcm7xx_load_bootrom(soc);
     npcm7xx_load_kernel(machine, soc);
 }
 
@@ -75,7 +97,7 @@  static void quanta_gsj_init(MachineState *machine)
     NPCM7xxState *soc;
 
     soc = npcm7xx_create_soc(machine, QUANTA_GSJ_POWER_ON_STRAPS);
-
+    npcm7xx_load_bootrom(soc);
     npcm7xx_load_kernel(machine, soc);
 }