Initial commit

include/l4/glue/arm/syscall.h

@@ -0,0 +1,60 @@
+/*
+ * ARM-specific system call details.
+ *
+ * Copyright (C) 2007 Bahadir Balban
+ *
+ */
+
+#ifndef __ARM_GLUE_SYSCALL_H__
+#define __ARM_GLUE_SYSCALL_H__
+
+/* Only specific call is the trap that gives back the kip address
+ * from which other system calls can be discovered. */
+#define L4_TRAP_KIP			0xB4
+
+/* Used in the kernel to refer to virtual address of this page.
+ * User space discovers it from the KIP */
+#define ARM_SYSCALL_PAGE		0xFFFFF000
+
+extern unsigned int __syscall_page_start;
+
+typedef struct syscall_args {
+	u32 r0;
+	u32 r1;
+	u32 r2;
+	u32 r3;		/* MR0 */
+	u32 r4;		/* MR1 */
+	u32 r5;		/* MR2 */
+	u32 r6;		/* MR3 */
+	u32 r7;		/* MR4 */
+	u32 r8;		/* MR5 */
+} syscall_args_t;
+
+typedef struct msg_regs {
+	u32 mr0;
+	u32 mr1;
+	u32 mr2;
+	u32 mr3;
+	u32 mr4;
+	u32 mr5;
+} msg_regs_t;
+
+/* NOTE:
+ * These references are valid only when they have been explicitly set
+ * by a kernel entry point, e.g. a system call, a data abort handler.
+ */
+#define KTCB_REF_ARG0(ktcb)	(&(ktcb)->syscall_regs->r0)
+#define KTCB_REF_MR0(ktcb)	(&(ktcb)->syscall_regs->r3)
+
+/* Represents each syscall. We get argument registers
+ * from stack for now. This is slower but the simplest. */
+typedef int (*syscall_fn_t)(struct syscall_args *regs);
+
+/* Entry point for syscall dispatching. Called from asm */
+int syscall(struct syscall_args *regs, unsigned long);
+
+/* Syscall-related initialiser called during system init. */
+void syscall_init(void);
+void kip_init_syscalls(void);
+
+#endif /* __ARM_GLUE_SYSCALL_H__ */