Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / blackfin / kernel / flat.c

diff --git a/kernel/arch/blackfin/kernel/flat.c b/kernel/arch/blackfin/kernel/flat.c
new file mode 100644 (file)
index 0000000..a88dadd
--- /dev/null
+++ b/kernel/arch/blackfin/kernel/flat.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2007 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/flat.h>
+
+#define FLAT_BFIN_RELOC_TYPE_16_BIT 0
+#define FLAT_BFIN_RELOC_TYPE_16H_BIT 1
+#define FLAT_BFIN_RELOC_TYPE_32_BIT 2
+
+unsigned long bfin_get_addr_from_rp(unsigned long *ptr,
+               unsigned long relval,
+               unsigned long flags,
+               unsigned long *persistent)
+{
+       unsigned short *usptr = (unsigned short *)ptr;
+       int type = (relval >> 26) & 7;
+       unsigned long val;
+
+       switch (type) {
+       case FLAT_BFIN_RELOC_TYPE_16_BIT:
+       case FLAT_BFIN_RELOC_TYPE_16H_BIT:
+               usptr = (unsigned short *)ptr;
+               pr_debug("*usptr = %x", get_unaligned(usptr));
+               val = get_unaligned(usptr);
+               val += *persistent;
+               break;
+
+       case FLAT_BFIN_RELOC_TYPE_32_BIT:
+               pr_debug("*ptr = %lx", get_unaligned(ptr));
+               val = get_unaligned(ptr);
+               break;
+
+       default:
+               pr_debug("BINFMT_FLAT: Unknown relocation type %x\n", type);
+               return 0;
+       }
+
+       /*
+        * Stack-relative relocs contain the offset into the stack, we
+        * have to add the stack's start address here and return 1 from
+        * flat_addr_absolute to prevent the normal address calculations
+        */
+       if (relval & (1 << 29))
+               return val + current->mm->context.end_brk;
+
+       if ((flags & FLAT_FLAG_GOTPIC) == 0)
+               val = htonl(val);
+       return val;
+}
+EXPORT_SYMBOL(bfin_get_addr_from_rp);
+
+/*
+ * Insert the address ADDR into the symbol reference at RP;
+ * RELVAL is the raw relocation-table entry from which RP is derived
+ */
+void bfin_put_addr_at_rp(unsigned long *ptr, unsigned long addr,
+               unsigned long relval)
+{
+       unsigned short *usptr = (unsigned short *)ptr;
+       int type = (relval >> 26) & 7;
+
+       switch (type) {
+       case FLAT_BFIN_RELOC_TYPE_16_BIT:
+               put_unaligned(addr, usptr);
+               pr_debug("new value %x at %p", get_unaligned(usptr), usptr);
+               break;
+
+       case FLAT_BFIN_RELOC_TYPE_16H_BIT:
+               put_unaligned(addr >> 16, usptr);
+               pr_debug("new value %x", get_unaligned(usptr));
+               break;
+
+       case FLAT_BFIN_RELOC_TYPE_32_BIT:
+               put_unaligned(addr, ptr);
+               pr_debug("new ptr =%lx", get_unaligned(ptr));
+               break;
+       }
+}
+EXPORT_SYMBOL(bfin_put_addr_at_rp);