metag: Remove arch/metag/

[sfrench/cifs-2.6.git] / arch / metag / kernel / ftrace.c

diff --git a/arch/metag/kernel/ftrace.c b/arch/metag/kernel/ftrace.c
deleted file mode 100644 (file)
index f7b23d3..0000000
--- a/arch/metag/kernel/ftrace.c
+++ /dev/null
@@ -1,121 +0,0 @@
-/*
- * Copyright (C) 2008 Imagination Technologies Ltd.
- * Licensed under the GPL
- *
- * Dynamic ftrace support.
- */
-
-#include <linux/ftrace.h>
-#include <linux/io.h>
-#include <linux/uaccess.h>
-
-#include <asm/cacheflush.h>
-
-#define D04_MOVT_TEMPLATE      0x02200005
-#define D04_CALL_TEMPLATE      0xAC200005
-#define D1RTP_MOVT_TEMPLATE    0x03200005
-#define D1RTP_CALL_TEMPLATE    0xAC200006
-
-static const unsigned long NOP[2] = {0xa0fffffe, 0xa0fffffe};
-static unsigned long movt_and_call_insn[2];
-
-static unsigned char *ftrace_nop_replace(void)
-{
-       return (char *)&NOP[0];
-}
-
-static unsigned char *ftrace_call_replace(unsigned long pc, unsigned long addr)
-{
-       unsigned long hi16, low16;
-
-       hi16 = (addr & 0xffff0000) >> 13;
-       low16 = (addr & 0x0000ffff) << 3;
-
-       /*
-        * The compiler makes the call to mcount_wrapper()
-        * (Meta's wrapper around mcount()) through the register
-        * D0.4. So whenever we're patching one of those compiler-generated
-        * calls we also need to go through D0.4. Otherwise use D1RtP.
-        */
-       if (pc == (unsigned long)&ftrace_call) {
-               writel(D1RTP_MOVT_TEMPLATE | hi16, &movt_and_call_insn[0]);
-               writel(D1RTP_CALL_TEMPLATE | low16, &movt_and_call_insn[1]);
-       } else {
-               writel(D04_MOVT_TEMPLATE | hi16, &movt_and_call_insn[0]);
-               writel(D04_CALL_TEMPLATE | low16, &movt_and_call_insn[1]);
-       }
-
-       return (unsigned char *)&movt_and_call_insn[0];
-}
-
-static int ftrace_modify_code(unsigned long pc, unsigned char *old_code,
-                             unsigned char *new_code)
-{
-       unsigned char replaced[MCOUNT_INSN_SIZE];
-
-       /*
-        * Note:
-        * We are paranoid about modifying text, as if a bug was to happen, it
-        * could cause us to read or write to someplace that could cause harm.
-        * Carefully read and modify the code with probe_kernel_*(), and make
-        * sure what we read is what we expected it to be before modifying it.
-        */
-
-       /* read the text we want to modify */
-       if (probe_kernel_read(replaced, (void *)pc, MCOUNT_INSN_SIZE))
-               return -EFAULT;
-
-       /* Make sure it is what we expect it to be */
-       if (memcmp(replaced, old_code, MCOUNT_INSN_SIZE) != 0)
-               return -EINVAL;
-
-       /* replace the text with the new text */
-       if (probe_kernel_write((void *)pc, new_code, MCOUNT_INSN_SIZE))
-               return -EPERM;
-
-       flush_icache_range(pc, pc + MCOUNT_INSN_SIZE);
-
-       return 0;
-}
-
-int ftrace_update_ftrace_func(ftrace_func_t func)
-{
-       int ret;
-       unsigned long pc;
-       unsigned char old[MCOUNT_INSN_SIZE], *new;
-
-       pc = (unsigned long)&ftrace_call;
-       memcpy(old, &ftrace_call, MCOUNT_INSN_SIZE);
-       new = ftrace_call_replace(pc, (unsigned long)func);
-       ret = ftrace_modify_code(pc, old, new);
-
-       return ret;
-}
-
-int ftrace_make_nop(struct module *mod,
-                   struct dyn_ftrace *rec, unsigned long addr)
-{
-       unsigned char *new, *old;
-       unsigned long ip = rec->ip;
-
-       old = ftrace_call_replace(ip, addr);
-       new = ftrace_nop_replace();
-
-       return ftrace_modify_code(ip, old, new);
-}
-
-int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
-{
-       unsigned char *new, *old;
-       unsigned long ip = rec->ip;
-
-       old = ftrace_nop_replace();
-       new = ftrace_call_replace(ip, addr);
-
-       return ftrace_modify_code(ip, old, new);
-}
-
-int __init ftrace_dyn_arch_init(void)
-{
-       return 0;
-}