1 files changed, 30 insertions, 0 deletions
diff --git a/tools/src/chickens_icestorm.c b/tools/src/chickens_icestorm.c
new file mode 100644
index 0000000..bc0cfb8
--- /dev/null
+++ b/tools/src/chickens_icestorm.c
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: MIT */
+
+#include "cpu_regs.h"
+#include "utils.h"
+
+static void init_common_icestorm(void)
+{
+    // "Sibling Merge in LLC can cause UC load to violate ARM Memory Ordering Rules."
+    reg_set(SYS_IMP_APL_HID5, HID5_DISABLE_FILL_2C_MERGE);
+
+    reg_clr(SYS_IMP_APL_EHID9, EHID9_DEV_2_THROTTLE_ENABLE);
+
+    // "Prevent store-to-load forwarding for UC memory to avoid barrier ordering
+    // violation"
+    reg_set(SYS_IMP_APL_EHID10, HID10_FORCE_WAIT_STATE_DRAIN_UC | HID10_DISABLE_ZVA_TEMPORAL_TSO);
+
+    // Disable SMC trapping to EL2
+    reg_clr(SYS_IMP_APL_EHID20, EHID20_TRAP_SMC);
+}
+
+void init_m1_icestorm(void)
+{
+    init_common_icestorm();
+
+    reg_set(SYS_IMP_APL_EHID20, EHID20_FORCE_NONSPEC_IF_OLDEST_REDIR_VALID_AND_OLDER |
+                                    EHID20_FORCE_NONSPEC_IF_SPEC_FLUSH_POINTER_NE_BLK_RTR_POINTER);
+
+    reg_mask(SYS_IMP_APL_EHID20, EHID20_FORCE_NONSPEC_TARGETED_TIMER_SEL_MASK,
+             EHID20_FORCE_NONSPEC_TARGETED_TIMER_SEL(3));
+}