diff --git a/bdk/mem/mc.c b/bdk/mem/mc.c
index 7e1a054e..2dd56baf 100644
--- a/bdk/mem/mc.c
+++ b/bdk/mem/mc.c
@@ -107,13 +107,13 @@ void mc_config_carveout_hos()
 }
 
 // SDMMC, TSEC, XUSB and probably more need it to access < DRAM_START.
-void mc_enable_ahb_redirect()
+void mc_enable_ahb_redirect(u32 offset)
 {
 	// Bypass ARC clock gating.
 	CLOCK(CLK_RST_CONTROLLER_LVL2_CLK_GATE_OVRD) |= BIT(19);
 	//MC(MC_IRAM_REG_CTRL) &= ~BIT(0);
 	MC(MC_IRAM_BOM) = IRAM_BASE;
-	MC(MC_IRAM_TOM) = DRAM_START - 1; // Default is only IRAM: 0x4003F000.
+	MC(MC_IRAM_TOM) = DRAM_START - offset; // Default is only IRAM: 0x4003F000.
 }
 
 void mc_disable_ahb_redirect()
@@ -150,5 +150,5 @@ void mc_enable()
 	usleep(5);
 
 	// Enable redirection by default.
-	mc_enable_ahb_redirect();
+	mc_enable_ahb_redirect(1);
 }
diff --git a/bdk/mem/mc.h b/bdk/mem/mc.h
index 05a8ad9e..b20a39f9 100644
--- a/bdk/mem/mc.h
+++ b/bdk/mem/mc.h
@@ -22,7 +22,7 @@
 
 void mc_config_tsec_carveout(u32 bom, u32 size1mb, bool lock);
 void mc_config_carveout_hos();
-void mc_enable_ahb_redirect();
+void mc_enable_ahb_redirect(u32 offset);
 void mc_disable_ahb_redirect();
 bool mc_client_has_access(void *address);
 void mc_enable();
diff --git a/bdk/sec/tsec.c b/bdk/sec/tsec.c
index c7553f96..03511948 100644
--- a/bdk/sec/tsec.c
+++ b/bdk/sec/tsec.c
@@ -97,7 +97,7 @@ int tsec_query(void *tsec_keys, tsec_ctxt_t *tsec_ctxt)
 		pmc_domain_pwrgate_set(POWER_RAIL_CE3, DISABLE);
 
 		// Enable AHB aperture and set it to full mmio.
-		mc_enable_ahb_redirect();
+		mc_enable_ahb_redirect(0);
 	}
 
 	// Configure Falcon.
@@ -308,7 +308,7 @@ out:
 	bpmp_clk_rate_relaxed(false);
 
 	// Re-enable AHB aperture.
-	mc_enable_ahb_redirect();
+	mc_enable_ahb_redirect(1);
 
 	return res;
 }
diff --git a/bdk/usb/xusbd.c b/bdk/usb/xusbd.c
index a4a47e60..bb8eeebf 100644
--- a/bdk/usb/xusbd.c
+++ b/bdk/usb/xusbd.c
@@ -931,7 +931,7 @@ int xusb_device_init()
 	bpmp_clk_rate_relaxed(false);
 
 	// Enable AHB redirect for access to IRAM for Event/EP ring buffers.
-	mc_enable_ahb_redirect();
+	mc_enable_ahb_redirect(1);
 
 	 // Enable XUSB device IPFS.
 	XUSB_DEV_DEV(XUSB_DEV_CONFIGURATION) |= DEV_CONFIGURATION_EN_FPCI;