--- /dev/null
+#ifndef SPARC64_CONTEXT_H
+#define SPARC64_CONTEXT_H
+
+#define STACK_BIAS 2047
+
+struct context {
+ /* General registers */
+ uint64_t regs[32];
+ uint64_t pc;
+ uint64_t npc;
+#define REG_O0 8
+#define REG_SP 14
+#define SP_LOC(ctx) (&(ctx)->regs[REG_SP])
+ /* Flags */
+ /* Optional stack contents */
+ uint64_t return_addr;
+ uint64_t param[0];
+};
+
+/* Create a new context in the given stack */
+struct context *
+init_context(uint8_t *stack, uint64_t stack_size, int num_param);
+
+/* Switch context */
+struct context *switch_to(struct context *);
+
+/* Holds physical address of boot context */
+extern unsigned long __boot_ctx;
+
+/* This can always be safely used to refer to the boot context */
+#define boot_ctx ((struct context *) phys_to_virt(__boot_ctx))
+
+#endif /* SPARC64_CONTEXT_H */