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Diffstat (limited to 'arch/unicore32/include/asm/processor.h')
-rw-r--r--arch/unicore32/include/asm/processor.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/arch/unicore32/include/asm/processor.h b/arch/unicore32/include/asm/processor.h
new file mode 100644
index 000000000000..e11cb0786578
--- /dev/null
+++ b/arch/unicore32/include/asm/processor.h
@@ -0,0 +1,92 @@
+/*
+ * linux/arch/unicore32/include/asm/processor.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __UNICORE_PROCESSOR_H__
+#define __UNICORE_PROCESSOR_H__
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr() ({ __label__ _l; _l: &&_l; })
+
+#ifdef __KERNEL__
+
+#include <asm/ptrace.h>
+#include <asm/types.h>
+
+#ifdef __KERNEL__
+#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX TASK_SIZE
+#endif
+
+struct debug_entry {
+ u32 address;
+ u32 insn;
+};
+
+struct debug_info {
+ int nsaved;
+ struct debug_entry bp[2];
+};
+
+struct thread_struct {
+ /* fault info */
+ unsigned long address;
+ unsigned long trap_no;
+ unsigned long error_code;
+ /* debugging */
+ struct debug_info debug;
+};
+
+#define INIT_THREAD { }
+
+#define start_thread(regs, pc, sp) \
+({ \
+ unsigned long *stack = (unsigned long *)sp; \
+ set_fs(USER_DS); \
+ memset(regs->uregs, 0, sizeof(regs->uregs)); \
+ regs->UCreg_asr = USER_MODE; \
+ regs->UCreg_pc = pc & ~1; /* pc */ \
+ regs->UCreg_sp = sp; /* sp */ \
+ regs->UCreg_02 = stack[2]; /* r2 (envp) */ \
+ regs->UCreg_01 = stack[1]; /* r1 (argv) */ \
+ regs->UCreg_00 = stack[0]; /* r0 (argc) */ \
+})
+
+/* Forward declaration, a strange C thing */
+struct task_struct;
+
+/* Free all resources held by a thread. */
+extern void release_thread(struct task_struct *);
+
+/* Prepare to copy thread state - unlazy all lazy status */
+#define prepare_to_copy(tsk) do { } while (0)
+
+unsigned long get_wchan(struct task_struct *p);
+
+#define cpu_relax() barrier()
+
+/*
+ * Create a new kernel thread
+ */
+extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
+
+#define task_pt_regs(p) \
+ ((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1)
+
+#define KSTK_EIP(tsk) (task_pt_regs(tsk)->UCreg_pc)
+#define KSTK_ESP(tsk) (task_pt_regs(tsk)->UCreg_sp)
+
+#endif
+
+#endif /* __UNICORE_PROCESSOR_H__ */