[PATCH] FRV: Introduce asm-offsets for FRV arch

Introduce the use of asm-offsets into the FRV architecture.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 115 insertions, 1 deletions

diff --git a/arch/frv/kernel/asm-offsets.c b/arch/frv/kernel/asm-offsets.c
index 9e263112a6e..fbb19fc1af4 100644
--- a/arch/frv/kernel/asm-offsets.c
+++ b/arch/frv/kernel/asm-offsets.c
@@ -1 +1,115 @@
-/* Dummy asm-offsets.c file. Required by kbuild and ready to be used - hint! */
+/*
+ * Generate definitions needed by assembly language modules.
+ * This code generates raw asm output which is post-processed
+ * to extract and format the required data.
+ */
+
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/personality.h>
+#include <asm/registers.h>
+#include <asm/ucontext.h>
+#include <asm/processor.h>
+#include <asm/thread_info.h>
+#include <asm/gdb-stub.h>
+
+#define DEFINE(sym, val) \
+        asm volatile("\n->" #sym " %0 " #val : : "i" (val))
+
+#define DEF_PTREG(sym, reg) \
+        asm volatile("\n->" #sym " %0 offsetof(struct pt_regs, " #reg ")" \
+		     : : "i" (offsetof(struct pt_regs, reg)))
+
+#define DEF_IREG(sym, reg) \
+        asm volatile("\n->" #sym " %0 offsetof(struct user_context, " #reg ")" \
+		     : : "i" (offsetof(struct user_context, reg)))
+
+#define DEF_FREG(sym, reg) \
+        asm volatile("\n->" #sym " %0 offsetof(struct user_context, " #reg ")" \
+		     : : "i" (offsetof(struct user_context, reg)))
+
+#define DEF_0REG(sym, reg) \
+        asm volatile("\n->" #sym " %0 offsetof(struct frv_frame0, " #reg ")" \
+		     : : "i" (offsetof(struct frv_frame0, reg)))
+
+#define BLANK() asm volatile("\n->" : : )
+
+#define OFFSET(sym, str, mem) \
+	DEFINE(sym, offsetof(struct str, mem));
+
+void foo(void)
+{
+	/* offsets into the thread_info structure */
+	OFFSET(TI_TASK,			thread_info, task);
+	OFFSET(TI_EXEC_DOMAIN,		thread_info, exec_domain);
+	OFFSET(TI_FLAGS,		thread_info, flags);
+	OFFSET(TI_STATUS,		thread_info, status);
+	OFFSET(TI_CPU,			thread_info, cpu);
+	OFFSET(TI_PREEMPT_COUNT,	thread_info, preempt_count);
+	OFFSET(TI_ADDR_LIMIT,		thread_info, addr_limit);
+	OFFSET(TI_RESTART_BLOCK,	thread_info, restart_block);
+	BLANK();
+
+	/* offsets into register file storage */
+	DEF_PTREG(REG_PSR,		psr);
+	DEF_PTREG(REG_ISR,		isr);
+	DEF_PTREG(REG_CCR,		ccr);
+	DEF_PTREG(REG_CCCR,		cccr);
+	DEF_PTREG(REG_LR,		lr);
+	DEF_PTREG(REG_LCR,		lcr);
+	DEF_PTREG(REG_PC,		pc);
+	DEF_PTREG(REG__STATUS,		__status);
+	DEF_PTREG(REG_SYSCALLNO,	syscallno);
+	DEF_PTREG(REG_ORIG_GR8,		orig_gr8);
+	DEF_PTREG(REG_GNER0,		gner0);
+	DEF_PTREG(REG_GNER1,		gner1);
+	DEF_PTREG(REG_IACC0,		iacc0);
+	DEF_PTREG(REG_TBR,		tbr);
+	DEF_PTREG(REG_GR0,		tbr);
+	DEFINE(REG__END,		sizeof(struct pt_regs));
+	BLANK();
+
+	DEF_0REG(REG_DCR,		debug.dcr);
+	DEF_0REG(REG_IBAR0,		debug.ibar[0]);
+	DEF_0REG(REG_DBAR0,		debug.dbar[0]);
+	DEF_0REG(REG_DBDR00,		debug.dbdr[0][0]);
+	DEF_0REG(REG_DBMR00,		debug.dbmr[0][0]);
+	BLANK();
+
+	DEF_IREG(__INT_GR0,		i.gr[0]);
+	DEF_FREG(__USER_FPMEDIA,	f);
+	DEF_FREG(__FPMEDIA_FR0,		f.fr[0]);
+	DEF_FREG(__FPMEDIA_FNER0,	f.fner[0]);
+	DEF_FREG(__FPMEDIA_MSR0,	f.msr[0]);
+	DEF_FREG(__FPMEDIA_ACC0,	f.acc[0]);
+	DEF_FREG(__FPMEDIA_ACCG0,	f.accg[0]);
+	DEF_FREG(__FPMEDIA_FSR0,	f.fsr[0]);
+	BLANK();
+
+	DEFINE(NR_PT_REGS,		sizeof(struct pt_regs) / 4);
+	DEFINE(NR_USER_INT_REGS,	sizeof(struct user_int_regs) / 4);
+	DEFINE(NR_USER_FPMEDIA_REGS,	sizeof(struct user_fpmedia_regs) / 4);
+	DEFINE(NR_USER_CONTEXT,		sizeof(struct user_context) / 4);
+	DEFINE(FRV_FRAME0_SIZE,		sizeof(struct frv_frame0));
+	BLANK();
+
+	/* offsets into thread_struct */
+	OFFSET(__THREAD_FRAME,		thread_struct, frame);
+	OFFSET(__THREAD_CURR,		thread_struct, curr);
+	OFFSET(__THREAD_SP,		thread_struct, sp);
+	OFFSET(__THREAD_FP,		thread_struct, fp);
+	OFFSET(__THREAD_LR,		thread_struct, lr);
+	OFFSET(__THREAD_PC,		thread_struct, pc);
+	OFFSET(__THREAD_GR16,		thread_struct, gr[0]);
+	OFFSET(__THREAD_SCHED_LR,	thread_struct, sched_lr);
+	OFFSET(__THREAD_FRAME0,		thread_struct, frame0);
+	OFFSET(__THREAD_USER,		thread_struct, user);
+	BLANK();
+
+	/* offsets into frv_debug_status */
+	OFFSET(DEBUG_BPSR,		frv_debug_status, bpsr);
+	OFFSET(DEBUG_DCR,		frv_debug_status, dcr);
+	OFFSET(DEBUG_BRR,		frv_debug_status, brr);
+	OFFSET(DEBUG_NMAR,		frv_debug_status, nmar);
+	BLANK();
+}