kern/amd64+os: proc: Add process initialization

Signed-off-by: Ian Moffett <ian@osmora.org>

2 files changed, 59 insertions, 0 deletions

diff --git a/sys/inc/mu/process.h b/sys/inc/mu/process.h
new file mode 100644
index 0000000..2e69140
--- /dev/null
+++ b/sys/inc/mu/process.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _MU_PROCESS_H_
+#define _MU_PROCESS_H_
+
+#include <sys/types.h>
+#include <os/process.h>
+
+/*
+ * Initialize machine specific process fields
+ *
+ * @process: Process to initialize
+ * @ip: Instruction pointer
+ */
+int mu_process_init(struct process *process, uintptr_t ip, int flags);
+
+#endif  /* !_MU_PROCESS_H_ */
diff --git a/sys/inc/os/process.h b/sys/inc/os/process.h
index 753779a..a2e3fdd 100644
--- a/sys/inc/os/process.h
+++ b/sys/inc/os/process.h
@@ -31,9 +31,13 @@
 #define _OS_PROCESS_H_ 1
 
 #include <sys/types.h>
+#include <sys/param.h>
 #include <sys/queue.h>
 #include <md/pcb.h>     /* shared */
 
+/* Flags for proc_init() */
+#define PROC_KERN BIT(0)     /* Kernel thread */
+
 /*
  * Represents a running process on the
  * system
@@ -48,4 +52,15 @@ struct process {
     TAILQ_ENTRY(process) link;
 };
 
+/*
+ * Initialize a process to a known state
+ *
+ * @process: Process to initialize
+ * @ip: Instruction pointer to jump to
+ * @flags: Optional flags
+ *
+ * Returns zero on success
+ */
+int process_init(struct process *process, uintptr_t ip, int flags);
+
 #endif  /* !_OS_PROCESS_H_ */