add initial smp bringup

2 files changed, 32 insertions, 0 deletions

diff --git a/include/arch/smp.h b/include/arch/smp.h
new file mode 100644
index 0000000..16c29d5
--- /dev/null
+++ b/include/arch/smp.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: copyleft-next-0.3.1 */
+/* Copyright 2023, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
+
+/**
+ * @file smp.h
+ * Arch specific multicore bringup stuff.
+ */
+
+#ifndef KMI_ARCH_SMP_H
+#define KMI_ARCH_SMP_H
+
+#include <kmi/vmem.h>
+
+/**
+ * Bring up other cores in system.
+ *
+ * @param b Direct + kernel mappin virtual memory to use.
+ * @param fdt Flattened device tree.
+ */
+void smp_bringup(struct vmem *b, void *fdt);
+
+#endif /* KMI_ARCH_SMP_H */
diff --git a/include/arch/tcb.h b/include/arch/tcb.h
index 0687954..f4c80c6 100644
--- a/include/arch/tcb.h
+++ b/include/arch/tcb.h
@@ -15,4 +15,14 @@
 #include "../../arch/riscv32/include/tcb.h"
 #endif
 
+/**
+ * Force store tcb \p t in arch-specific way.
+ * cpu_assign() is allowed to assume there's always a valid tcb
+ * set, so during init we have to force set a tcb before cpu_assign() can be
+ * used.
+ *
+ * @param t tcb to set.
+ */
+void tcb_assign(struct tcb *t);
+
 #endif /* KMI_ARCH_TCB_H */