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-rw-r--r--kernel/arch/blackfin/include/asm/processor.h158
1 files changed, 158 insertions, 0 deletions
diff --git a/kernel/arch/blackfin/include/asm/processor.h b/kernel/arch/blackfin/include/asm/processor.h
new file mode 100644
index 000000000..7acd46653
--- /dev/null
+++ b/kernel/arch/blackfin/include/asm/processor.h
@@ -0,0 +1,158 @@
+/*
+ * Copyright 2004-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __ASM_BFIN_PROCESSOR_H
+#define __ASM_BFIN_PROCESSOR_H
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr() ({ __label__ _l; _l: &&_l;})
+
+#include <asm/ptrace.h>
+#include <mach/blackfin.h>
+
+static inline unsigned long rdusp(void)
+{
+ unsigned long usp;
+
+ __asm__ __volatile__("%0 = usp;\n\t":"=da"(usp));
+ return usp;
+}
+
+static inline void wrusp(unsigned long usp)
+{
+ __asm__ __volatile__("usp = %0;\n\t"::"da"(usp));
+}
+
+static inline unsigned long __get_SP(void)
+{
+ unsigned long sp;
+
+ __asm__ __volatile__("%0 = sp;\n\t" : "=da"(sp));
+ return sp;
+}
+
+/*
+ * User space process size: 1st byte beyond user address space.
+ * Fairly meaningless on nommu. Parts of user programs can be scattered
+ * in a lot of places, so just disable this by setting it to 0xFFFFFFFF.
+ */
+#define TASK_SIZE 0xFFFFFFFF
+
+#ifdef __KERNEL__
+#define STACK_TOP TASK_SIZE
+#endif
+
+#define TASK_UNMAPPED_BASE 0
+
+struct thread_struct {
+ unsigned long ksp; /* kernel stack pointer */
+ unsigned long usp; /* user stack pointer */
+ unsigned short seqstat; /* saved status register */
+ unsigned long esp0; /* points to SR of stack frame pt_regs */
+ unsigned long pc; /* instruction pointer */
+ void * debuggerinfo;
+};
+
+#define INIT_THREAD { \
+ sizeof(init_stack) + (unsigned long) init_stack, 0, \
+ PS_S, 0, 0 \
+}
+
+extern void start_thread(struct pt_regs *regs, unsigned long new_ip,
+ unsigned long new_sp);
+
+/* Forward declaration, a strange C thing */
+struct task_struct;
+
+/* Free all resources held by a thread. */
+static inline void release_thread(struct task_struct *dead_task)
+{
+}
+
+/*
+ * Free current thread data structures etc..
+ */
+static inline void exit_thread(void)
+{
+}
+
+/*
+ * Return saved PC of a blocked thread.
+ */
+#define thread_saved_pc(tsk) (tsk->thread.pc)
+
+unsigned long get_wchan(struct task_struct *p);
+
+#define KSTK_EIP(tsk) \
+ ({ \
+ unsigned long eip = 0; \
+ if ((tsk)->thread.esp0 > PAGE_SIZE && \
+ MAP_NR((tsk)->thread.esp0) < max_mapnr) \
+ eip = ((struct pt_regs *) (tsk)->thread.esp0)->pc; \
+ eip; })
+#define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp)
+
+#define cpu_relax() smp_mb()
+#define cpu_relax_lowlatency() cpu_relax()
+
+/* Get the Silicon Revision of the chip */
+static inline uint32_t __pure bfin_revid(void)
+{
+ /* Always use CHIPID, to work around ANOMALY_05000234 */
+ uint32_t revid = (bfin_read_CHIPID() & CHIPID_VERSION) >> 28;
+
+#ifdef _BOOTROM_GET_DXE_ADDRESS_TWI
+ /*
+ * ANOMALY_05000364
+ * Incorrect Revision Number in DSPID Register
+ */
+ if (ANOMALY_05000364 &&
+ bfin_read16(_BOOTROM_GET_DXE_ADDRESS_TWI) == 0x2796)
+ revid = 1;
+#endif
+
+ return revid;
+}
+
+static inline uint16_t __pure bfin_cpuid(void)
+{
+ return (bfin_read_CHIPID() & CHIPID_FAMILY) >> 12;
+}
+
+static inline uint32_t __pure bfin_dspid(void)
+{
+ return bfin_read_DSPID();
+}
+
+#define blackfin_core_id() (bfin_dspid() & 0xff)
+
+static inline uint32_t __pure bfin_compiled_revid(void)
+{
+#if defined(CONFIG_BF_REV_0_0)
+ return 0;
+#elif defined(CONFIG_BF_REV_0_1)
+ return 1;
+#elif defined(CONFIG_BF_REV_0_2)
+ return 2;
+#elif defined(CONFIG_BF_REV_0_3)
+ return 3;
+#elif defined(CONFIG_BF_REV_0_4)
+ return 4;
+#elif defined(CONFIG_BF_REV_0_5)
+ return 5;
+#elif defined(CONFIG_BF_REV_0_6)
+ return 6;
+#elif defined(CONFIG_BF_REV_ANY)
+ return 0xffff;
+#else
+ return -1;
+#endif
+}
+
+#endif