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-rw-r--r--arch/blackfin/include/asm/entry.h61
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/entry.h b/arch/blackfin/include/asm/entry.h
new file mode 100644
index 0000000..c4f721e
--- /dev/null
+++ b/arch/blackfin/include/asm/entry.h
@@ -0,0 +1,61 @@
+#ifndef __BFIN_ENTRY_H
+#define __BFIN_ENTRY_H
+
+#include <asm/setup.h>
+#include <asm/page.h>
+
+#ifdef __ASSEMBLY__
+
+#define LFLUSH_I_AND_D 0x00000808
+#define LSIGTRAP 5
+
+/* process bits for task_struct.flags */
+#define PF_TRACESYS_OFF 3
+#define PF_TRACESYS_BIT 5
+#define PF_PTRACED_OFF 3
+#define PF_PTRACED_BIT 4
+#define PF_DTRACE_OFF 1
+#define PF_DTRACE_BIT 5
+
+/*
+ * NOTE! The single-stepping code assumes that all interrupt handlers
+ * start by saving SYSCFG on the stack with their first instruction.
+ */
+
+/* This one is used for exceptions, emulation, and NMI. It doesn't push
+ RETI and doesn't do cli. */
+#define SAVE_ALL_SYS save_context_no_interrupts
+/* This is used for all normal interrupts. It saves a minimum of registers
+ to the stack, loads the IRQ number, and jumps to common code. */
+#define INTERRUPT_ENTRY(N) \
+ [--sp] = SYSCFG; \
+ \
+ [--sp] = P0; /*orig_p0*/ \
+ [--sp] = R0; /*orig_r0*/ \
+ [--sp] = (R7:0,P5:0); \
+ R0 = (N); \
+ jump __common_int_entry;
+
+/* For timer interrupts, we need to save IPEND, since the user_mode
+ macro accesses it to determine where to account time. */
+#define TIMER_INTERRUPT_ENTRY(N) \
+ [--sp] = SYSCFG; \
+ \
+ [--sp] = P0; /*orig_p0*/ \
+ [--sp] = R0; /*orig_r0*/ \
+ [--sp] = (R7:0,P5:0); \
+ p0.l = lo(IPEND); \
+ p0.h = hi(IPEND); \
+ r1 = [p0]; \
+ R0 = (N); \
+ jump __common_int_entry;
+
+/* This one pushes RETI without using CLI. Interrupts are enabled. */
+#define SAVE_CONTEXT_SYSCALL save_context_syscall
+#define SAVE_CONTEXT save_context_with_interrupts
+
+#define RESTORE_ALL_SYS restore_context_no_interrupts
+#define RESTORE_CONTEXT restore_context_with_interrupts
+
+#endif /* __ASSEMBLY__ */
+#endif /* __BFIN_ENTRY_H */
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