[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 3

The attached patches provides part 3 of an architecture implementation for the
Tensilica Xtensa CPU series.

Signed-off-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 94 insertions, 0 deletions

diff --git a/arch/xtensa/kernel/asm-offsets.c b/arch/xtensa/kernel/asm-offsets.c
new file mode 100644
index 000000000000..840cd9a1d3d2
--- /dev/null
+++ b/arch/xtensa/kernel/asm-offsets.c
@@ -0,0 +1,94 @@
+/*
+ * arch/xtensa/kernel/asm-offsets.c
+ *
+ * Generates definitions from c-type structures used by assembly sources.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2005 Tensilica Inc.
+ *
+ * Chris Zankel <chris@zankel.net>
+ */
+
+#include <asm/processor.h>
+
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/stddef.h>
+#include <linux/thread_info.h>
+#include <linux/ptrace.h>
+#include <asm/ptrace.h>
+#include <asm/processor.h>
+#include <asm/uaccess.h>
+
+#define DEFINE(sym, val) asm volatile("\n->" #sym " %0 " #val : : "i" (val))
+#define BLANK() asm volatile("\n->" : : )
+
+int main(void)
+{
+        /* struct pt_regs */
+        DEFINE(PT_PC, offsetof (struct pt_regs, pc));
+        DEFINE(PT_PS, offsetof (struct pt_regs, ps));
+        DEFINE(PT_DEPC, offsetof (struct pt_regs, depc));
+        DEFINE(PT_EXCCAUSE, offsetof (struct pt_regs, exccause));
+        DEFINE(PT_EXCVADDR, offsetof (struct pt_regs, excvaddr));
+        DEFINE(PT_DEBUGCAUSE, offsetof (struct pt_regs, debugcause));
+        DEFINE(PT_WMASK, offsetof (struct pt_regs, wmask));
+        DEFINE(PT_LBEG, offsetof (struct pt_regs, lbeg));
+        DEFINE(PT_LEND, offsetof (struct pt_regs, lend));
+        DEFINE(PT_LCOUNT, offsetof (struct pt_regs, lcount));
+        DEFINE(PT_SAR, offsetof (struct pt_regs, sar));
+        DEFINE(PT_SYSCALL, offsetof (struct pt_regs, syscall));
+        DEFINE(PT_AREG, offsetof (struct pt_regs, areg[0]));
+        DEFINE(PT_AREG0, offsetof (struct pt_regs, areg[0]));
+        DEFINE(PT_AREG1, offsetof (struct pt_regs, areg[1]));
+        DEFINE(PT_AREG2, offsetof (struct pt_regs, areg[2]));
+        DEFINE(PT_AREG3, offsetof (struct pt_regs, areg[3]));
+        DEFINE(PT_AREG4, offsetof (struct pt_regs, areg[4]));
+        DEFINE(PT_AREG5, offsetof (struct pt_regs, areg[5]));
+        DEFINE(PT_AREG6, offsetof (struct pt_regs, areg[6]));
+        DEFINE(PT_AREG7, offsetof (struct pt_regs, areg[7]));
+        DEFINE(PT_AREG8, offsetof (struct pt_regs, areg[8]));
+        DEFINE(PT_AREG9, offsetof (struct pt_regs, areg[9]));
+        DEFINE(PT_AREG10, offsetof (struct pt_regs, areg[10]));
+        DEFINE(PT_AREG11, offsetof (struct pt_regs, areg[11]));
+        DEFINE(PT_AREG12, offsetof (struct pt_regs, areg[12]));
+        DEFINE(PT_AREG13, offsetof (struct pt_regs, areg[13]));
+        DEFINE(PT_AREG14, offsetof (struct pt_regs, areg[14]));
+        DEFINE(PT_AREG15, offsetof (struct pt_regs, areg[15]));
+        DEFINE(PT_WINDOWBASE, offsetof (struct pt_regs, windowbase));
+        DEFINE(PT_WINDOWSTART, offsetof(struct pt_regs, windowstart));
+        DEFINE(PT_SIZE, sizeof(struct pt_regs));
+        DEFINE(PT_AREG_END, offsetof (struct pt_regs, areg[XCHAL_NUM_AREGS]));
+        DEFINE(PT_USER_SIZE, offsetof(struct pt_regs, areg[XCHAL_NUM_AREGS]));
+        BLANK();
+
+        /* struct task_struct */
+        DEFINE(TASK_PTRACE, offsetof (struct task_struct, ptrace));
+        DEFINE(TASK_MM, offsetof (struct task_struct, mm));
+        DEFINE(TASK_ACTIVE_MM, offsetof (struct task_struct, active_mm));
+        DEFINE(TASK_PID, offsetof (struct task_struct, pid));
+        DEFINE(TASK_THREAD, offsetof (struct task_struct, thread));
+        DEFINE(TASK_THREAD_INFO, offsetof (struct task_struct, thread_info));
+        DEFINE(TASK_STRUCT_SIZE, sizeof (struct task_struct));
+        BLANK();
+
+        /* struct thread_info (offset from start_struct) */
+        DEFINE(THREAD_RA, offsetof (struct task_struct, thread.ra));
+        DEFINE(THREAD_SP, offsetof (struct task_struct, thread.sp));
+        DEFINE(THREAD_CP_SAVE, offsetof (struct task_struct, thread.cp_save));
+        DEFINE(THREAD_CURRENT_DS, offsetof (struct task_struct, thread.current_ds));
+        BLANK();
+
+        /* struct mm_struct */
+        DEFINE(MM_USERS, offsetof(struct mm_struct, mm_users));
+        DEFINE(MM_PGD, offsetof (struct mm_struct, pgd));
+        DEFINE(MM_CONTEXT, offsetof (struct mm_struct, context));
+        BLANK();
+        DEFINE(PT_SINGLESTEP_BIT, PT_SINGLESTEP_BIT);
+        return 0;
+}
+
+