[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 9e263112a6e2..fbb19fc1af40 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();
+}