From: Jamin Lin <jamin_lin@aspeedtech.com>

Introduce a new vbootrom memory region. The region is mapped at address
"0x00000000" and has a size of 128KB, identical to the SRAM region size.
This memory region is intended for loading a vbootrom image file as part of the
boot process.

The vbootrom registered in the SoC's address space using the ASPEED_DEV_VBOOTROM
index.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Nabih Estefan <nabihestefan@google.com>
Tested-by: Nabih Estefan <nabihestefan@google.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250424075135.3715128-2-jamin_lin@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 include/hw/arm/aspeed_soc.h | 2 ++
 hw/arm/aspeed_ast27x0.c     | 9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/include/hw/arm/aspeed_soc.h b/include/hw/arm/aspeed_soc.h
index c1e80c8908b3..4dcb1010dc28 100644
--- a/include/hw/arm/aspeed_soc.h
+++ b/include/hw/arm/aspeed_soc.h
@@ -59,6 +59,7 @@ struct AspeedSoCState {
     MemoryRegion sram;
     MemoryRegion spi_boot_container;
     MemoryRegion spi_boot;
+    MemoryRegion vbootrom;
     AddressSpace dram_as;
     AspeedRtcState rtc;
     AspeedTimerCtrlState timerctrl;
@@ -169,6 +170,7 @@ struct AspeedSoCClass {
 const char *aspeed_soc_cpu_type(AspeedSoCClass *sc);
 
 enum {
+    ASPEED_DEV_VBOOTROM,
     ASPEED_DEV_SPI_BOOT,
     ASPEED_DEV_IOMEM,
     ASPEED_DEV_UART0,
diff --git a/hw/arm/aspeed_ast27x0.c b/hw/arm/aspeed_ast27x0.c
index 2e21c3a98fa0..a289e65e495d 100644
--- a/hw/arm/aspeed_ast27x0.c
+++ b/hw/arm/aspeed_ast27x0.c
@@ -24,6 +24,7 @@
 #include "qemu/log.h"
 
 static const hwaddr aspeed_soc_ast2700_memmap[] = {
+    [ASPEED_DEV_VBOOTROM]  =  0x00000000,
     [ASPEED_DEV_SRAM]      =  0x10000000,
     [ASPEED_DEV_EHCI1]     =  0x12061000,
     [ASPEED_DEV_EHCI2]     =  0x12063000,
@@ -672,6 +673,14 @@ static void aspeed_soc_ast2700_realize(DeviceState *dev, Error **errp)
     memory_region_add_subregion(s->memory,
                                 sc->memmap[ASPEED_DEV_SRAM], &s->sram);
 
+    /* VBOOTROM */
+    if (!memory_region_init_ram(&s->vbootrom, OBJECT(s), "aspeed.vbootrom",
+                                0x20000, errp)) {
+        return;
+    }
+    memory_region_add_subregion(s->memory,
+                                sc->memmap[ASPEED_DEV_VBOOTROM], &s->vbootrom);
+
     /* SCU */
     if (!sysbus_realize(SYS_BUS_DEVICE(&s->scu), errp)) {
         return;
-- 
2.49.0