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detect ar7 at runtime in set_except_vector and remove useless volatile 

SVN-Revision: 8824
lede-17.01
Matteo Croce 2007-09-17 12:45:38 +00:00
parent 0d56d48d9a
commit aa1144ff37
1 changed files with 25 additions and 21 deletions
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46
target/linux/ar7/patches-2.6.22/100-board_support.patch
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@ -26,31 +26,35 @@ diff -urN linux-2.6.22/arch/mips/Kconfig linux-2.6.22.new/arch/mips/Kconfig
diff -urN linux-2.6.22/arch/mips/kernel/traps.c linux-2.6.22.new/arch/mips/kernel/traps.c
--- linux-2.6.22/arch/mips/kernel/traps.c 2007-07-09 01:32:17.000000000 +0200
+++ linux-2.6.22.new/arch/mips/kernel/traps.c 2007-07-11 02:32:39.000000000 +0200
@@ -1075,9 +1075,23 @@ void *set_except_vector(int n, void *addr)
@@ -1074,11 +1074,23 @@ void *set_except_vector(int n, void *addr)
unsigned long old_handler = exception_handlers[n];
exception_handlers[n] = handler;
if (n == 0 && cpu_has_divec) {
+#ifdef CONFIG_AR7
+ /* lui k0, 0x0000 */
+ *(volatile u32 *)(ebase + 0x200) =
+ 0x3c1a0000 | (handler >> 16);
+ /* ori k0, 0x0000 */
+ *(volatile u32 *)(ebase + 0x204) =
+ 0x375a0000 | (handler & 0xffff);
+ /* jr k0 */
+ *(volatile u32 *)(ebase + 0x208) = 0x03400008;
+ /* nop */
+ *(volatile u32 *)(ebase + 0x20C) = 0x00000000;
+ flush_icache_range(ebase + 0x200, ebase + 0x210);
+#else
*(volatile u32 *)(ebase + 0x200) = 0x08000000 |
(0x03ffffff & (handler >> 2));
flush_icache_range(ebase + 0x200, ebase + 0x204);
+#endif
}
- if (n == 0 && cpu_has_divec) {
- *(volatile u32 *)(ebase + 0x200) = 0x08000000 |
- (0x03ffffff & (handler >> 2));
- flush_icache_range(ebase + 0x200, ebase + 0x204);
- }
+ if (n == 0 && cpu_has_divec)
+ 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 {
+ *(volatile u32 *)(ebase + 0x200) =
+ 0x08000000 | (0x03ffffff & (handler >> 2));
+ flush_icache_range(ebase + 0x200, ebase + 0x204);
+ }
return (void *)old_handler;
}
diff -urN linux-2.6.22/arch/mips/Makefile linux-2.6.22.new/arch/mips/Makefile
--- linux-2.6.22/arch/mips/Makefile 2007-07-09 01:32:17.000000000 +0200
+++ linux-2.6.22.new/arch/mips/Makefile 2007-07-11 02:32:39.000000000 +0200