[ar7] add missing patch to arch/mips/kernel/traps.c to allow ar7 to setup its handler...

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19812 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/ar7/patches-2.6.32/100-board_support.patch b/target/linux/ar7/patches-2.6.32/100-board_support.patch
new file mode 100644 (file)
index 0000000..caa441e
--- /dev/null
+++ b/target/linux/ar7/patches-2.6.32/100-board_support.patch
@@ -0,0 +1,28 @@
+--- a/arch/mips/kernel/traps.c
++++ b/arch/mips/kernel/traps.c
+@@ -1256,9 +1256,22 @@ void *set_except_vector(int n, void *add
+ 
+       exception_handlers[n] = handler;
+       if (n == 0 && cpu_has_divec) {
+-              *(u32 *)(ebase + 0x200) = 0x08000000 |
+-                                        (0x03ffffff & (handler >> 2));
+-              local_flush_icache_range(ebase + 0x200, ebase + 0x204);
++              if ((handler ^ (ebase + 4)) & 0xfc000000) {
++                      /* lui k0, 0x0000 */
++                      *(u32 *)(ebase + 0x200) = 0x3c1a0000 | (handler >> 16);
++                      /* ori k0, 0x0000 */
++                      *(u32 *)(ebase + 0x204) =
++                                      0x375a0000 | (handler & 0xffff);
++                      /* jr k0 */
++                      *(u32 *)(ebase + 0x208) = 0x03400008;
++                      /* nop */
++                      *(u32 *)(ebase + 0x20C) = 0x00000000;
++                      flush_icache_range(ebase + 0x200, ebase + 0x210);
++              } else {
++                      *(u32 *)(ebase + 0x200) =
++                              0x08000000 | (0x03ffffff & (handler >> 2));
++                      flush_icache_range(ebase + 0x200, ebase + 0x204);
++              }
+       }
+       return (void *)old_handler;
+ }