[ifxmips]:

[openwrt/svn-archive/archive.git] / target / linux / ifxmips / patches / 000-mips-bad-intctl.patch

diff --git a/target/linux/ifxmips/patches/000-mips-bad-intctl.patch b/target/linux/ifxmips/patches/000-mips-bad-intctl.patch
new file mode 100644 (file)
index 0000000..7c0f52d
--- /dev/null
+++ b/target/linux/ifxmips/patches/000-mips-bad-intctl.patch
@@ -0,0 +1,35 @@
+--- a/arch/mips/kernel/traps.c
++++ b/arch/mips/kernel/traps.c
+@@ -1496,7 +1496,18 @@ void __cpuinit per_cpu_trap_init(void)
+       if (cpu_has_mips_r2) {
+               cp0_compare_irq_shift = CAUSEB_TI - CAUSEB_IP;
+               cp0_compare_irq = (read_c0_intctl() >> INTCTLB_IPTI) & 7;
++
++              if (!cp0_compare_irq)
++                      cp0_compare_irq = CP0_LEGACY_COMPARE_IRQ;
++
+               cp0_perfcount_irq = (read_c0_intctl() >> INTCTLB_IPPCI) & 7;
++
++              if (!cp0_perfcount_irq)
++                      cp0_perfcount_irq = CP0_LEGACY_PERFCNT_IRQ;
++
++              if (arch_fixup_c0_irqs)
++                      arch_fixup_c0_irqs();
++
+               if (cp0_perfcount_irq == cp0_compare_irq)
+                       cp0_perfcount_irq = -1;
+       } else {
+--- a/arch/mips/include/asm/irq.h
++++ b/arch/mips/include/asm/irq.h
+@@ -133,9 +133,11 @@ extern void free_irqno(unsigned int irq)
+  * IE7.  Since R2 their number has to be read from the c0_intctl register.
+  */
+ #define CP0_LEGACY_COMPARE_IRQ 7
++#define CP0_LEGACY_PERFCNT_IRQ 7
+ 
+ extern int cp0_compare_irq;
+ extern int cp0_compare_irq_shift;
+ extern int cp0_perfcount_irq;
++extern void __weak arch_fixup_c0_irqs(void);
+ 
+ #endif /* _ASM_IRQ_H */