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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/microblaze/include/asm/flat.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/microblaze/include/asm/flat.h')
-rw-r--r--kernel/arch/microblaze/include/asm/flat.h89
1 files changed, 89 insertions, 0 deletions
diff --git a/kernel/arch/microblaze/include/asm/flat.h b/kernel/arch/microblaze/include/asm/flat.h
new file mode 100644
index 000000000..6847c1512
--- /dev/null
+++ b/kernel/arch/microblaze/include/asm/flat.h
@@ -0,0 +1,89 @@
+/*
+ * uClinux flat-format executables
+ *
+ * Copyright (C) 2005 John Williams <jwilliams@itee.uq.edu.au>
+ *
+ * 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.
+ */
+
+#ifndef _ASM_MICROBLAZE_FLAT_H
+#define _ASM_MICROBLAZE_FLAT_H
+
+#include <asm/unaligned.h>
+
+#define flat_argvp_envp_on_stack() 0
+#define flat_old_ram_flag(flags) (flags)
+#define flat_reloc_valid(reloc, size) ((reloc) <= (size))
+#define flat_set_persistent(relval, p) 0
+
+/*
+ * Microblaze works a little differently from other arches, because
+ * of the MICROBLAZE_64 reloc type. Here, a 32 bit address is split
+ * over two instructions, an 'imm' instruction which provides the top
+ * 16 bits, then the instruction "proper" which provides the low 16
+ * bits.
+ */
+
+/*
+ * Crack open a symbol reference and extract the address to be
+ * relocated. rp is a potentially unaligned pointer to the
+ * reference
+ */
+
+static inline unsigned long
+flat_get_addr_from_rp(unsigned long *rp, unsigned long relval,
+ unsigned long flags, unsigned long *persistent)
+{
+ unsigned long addr;
+ (void)flags;
+
+ /* Is it a split 64/32 reference? */
+ if (relval & 0x80000000) {
+ /* Grab the two halves of the reference */
+ unsigned long val_hi, val_lo;
+
+ val_hi = get_unaligned(rp);
+ val_lo = get_unaligned(rp+1);
+
+ /* Crack the address out */
+ addr = ((val_hi & 0xffff) << 16) + (val_lo & 0xffff);
+ } else {
+ /* Get the address straight out */
+ addr = get_unaligned(rp);
+ }
+
+ return addr;
+}
+
+/*
+ * Insert an address into the symbol reference at rp. rp is potentially
+ * unaligned.
+ */
+
+static inline void
+flat_put_addr_at_rp(unsigned long *rp, unsigned long addr, unsigned long relval)
+{
+ /* Is this a split 64/32 reloc? */
+ if (relval & 0x80000000) {
+ /* Get the two "halves" */
+ unsigned long val_hi = get_unaligned(rp);
+ unsigned long val_lo = get_unaligned(rp + 1);
+
+ /* insert the address */
+ val_hi = (val_hi & 0xffff0000) | addr >> 16;
+ val_lo = (val_lo & 0xffff0000) | (addr & 0xffff);
+
+ /* store the two halves back into memory */
+ put_unaligned(val_hi, rp);
+ put_unaligned(val_lo, rp+1);
+ } else {
+ /* Put it straight in, no messing around */
+ put_unaligned(addr, rp);
+ }
+}
+
+#define flat_get_relocate_addr(rel) (rel & 0x7fffffff)
+
+#endif /* _ASM_MICROBLAZE_FLAT_H */