From 5feb3b8332bad763afe03e8d3dbf2fabbebe6ecf Mon Sep 17 00:00:00 2001
From: SashegDev <gdsasheg@gmail.com>
Date: Fri, 11 Sep 2026 07:26:43 +0000
Subject: [PATCH] saimaa: low-RAM scratch at 0x3000 for SBL probes

---
 qemu/saimaa.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/qemu/saimaa.c b/qemu/saimaa.c
index a6dd2a9..cfb48ba 100644
--- a/qemu/saimaa.c
+++ b/qemu/saimaa.c
@@ -290,6 +290,15 @@ static void saimaa_machine_init(MachineState *machine)
         memory_region_add_subregion(sysmem, 0x0, vec);
     }
 
+    /* Low-RAM scratch for SBL1 low-address probes (e.g. [0x3146]).
+     * Real HW has PBL ROM/XPU here; zeros for now (WIP). */
+    {
+        MemoryRegion *low = g_new(MemoryRegion, 1);
+        memory_region_init_ram(low, NULL, "saimaa.low", 0x1000,
+                               &error_fatal);
+        memory_region_add_subregion(sysmem, 0x3000, low);
+    }
+
     /* SDHCI + eMMC image */
     DeviceState *sdhci = qdev_new(TYPE_SYSBUS_SDHCI);
     sysbus_realize(SYS_BUS_DEVICE(sdhci), &error_fatal);