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-rw-r--r--target/linux/aruba-2.6/patches/002-irq.patch76
1 files changed, 29 insertions, 47 deletions
diff --git a/target/linux/aruba-2.6/patches/002-irq.patch b/target/linux/aruba-2.6/patches/002-irq.patch
index 94e68cfb0..8faffaf9b 100644
--- a/target/linux/aruba-2.6/patches/002-irq.patch
+++ b/target/linux/aruba-2.6/patches/002-irq.patch
@@ -92,7 +92,7 @@ diff -Nur linux-2.6.15/arch/mips/aruba/idtIRQ.S linux-2.6.15-openwrt/arch/mips/a
diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/aruba/irq.c
--- linux-2.6.15/arch/mips/aruba/irq.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.15-openwrt/arch/mips/aruba/irq.c 2006-01-10 00:32:32.000000000 +0100
-@@ -0,0 +1,447 @@
+@@ -0,0 +1,429 @@
+/**************************************************************************
+ *
+ * BRIEF MODULE DESCRIPTION
@@ -183,8 +183,8 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub
+};
+
+#define READ_PEND_MERLOT(base) (*((volatile unsigned long *)(0xbc003010)))
-+#define READ_MASK_MERLOT(base) (*((volatile unsigned long *)(0xbc003010 + 4)))
-+#define WRITE_MASK_MERLOT(base, val) ((*((volatile unsigned long *)((0xbc003010) + 4))) = (val))
++#define READ_MASK_MERLOT(base) (*((volatile unsigned long *)(0xbc003014)))
++#define WRITE_MASK_MERLOT(base, val) ((*((volatile unsigned long *)(0xbc003014))) = (val), READ_MASK_MERLOT())
+
+static const intr_group_t intr_group_muscat[NUM_INTR_GROUPS] = {
+ {0x0000efff, (u32 *) KSEG1ADDR(IC_GROUP0_PEND + 0 * IC_GROUP_OFFSET)},
@@ -224,21 +224,14 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub
+
+static inline void enable_local_irq(unsigned int ip)
+{
-+ int ipnum = 0x100 << ip;
-+ clear_c0_cause(ipnum);
-+ set_c0_status(ipnum);
++ set_c0_status(0x100 << ip);
++ irq_enable_hazard();
+}
+
+static inline void disable_local_irq(unsigned int ip)
+{
-+ int ipnum = 0x100 << ip;
-+ clear_c0_status(ipnum);
-+}
-+
-+static inline void ack_local_irq(unsigned int ip)
-+{
-+ int ipnum = 0x100 << ip;
-+ clear_c0_cause(ipnum);
++ clear_c0_status(0x100 << ip);
++ irq_disable_hazard();
+}
+
+static void aruba_enable_irq(unsigned int irq_nr)
@@ -270,9 +263,6 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub
+ ip -= (group << 5);
+ intr_bit = 1 << ip;
+
-+ // first enable the IP mapped to this IRQ
-+ enable_local_irq(group_to_ip(group));
-+
+ switch (mips_machtype) {
+ case MACH_ARUBA_AP70:
+ addr = intr_group_muscat[group].base_addr;
@@ -285,8 +275,10 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub
+ WRITE_MASK_MERLOT(addr, READ_MASK_MERLOT(addr) | intr_bit);
+ break;
+ }
++ enable_local_irq(group_to_ip(group));
+ }
+
++ back_to_back_c0_hazard();
+ local_irq_restore(flags);
+
+}
@@ -341,15 +333,15 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub
+ // mask intr within group
+ mask = READ_MASK_MERLOT(addr);
+ mask &= ~intr_bit;
-+ WRITE_MASK_MERLOT(addr, mask);
-+ if (READ_MASK_MERLOT(addr))
++ if (!mask)
+ disable_local_irq(group_to_ip(group));
++ WRITE_MASK_MERLOT(addr, mask);
+ break;
+ }
+ }
+
++ back_to_back_c0_hazard();
+ local_irq_restore(flags);
-+
+}
+
+static unsigned int startup_irq(unsigned int irq_nr)
@@ -361,29 +353,31 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub
+static void shutdown_irq(unsigned int irq_nr)
+{
+ aruba_disable_irq(irq_nr);
-+ return;
+}
+
+static void mask_and_ack_irq(unsigned int irq_nr)
+{
+ aruba_disable_irq(irq_nr);
-+ ack_local_irq(group_to_ip(irq_to_group(irq_nr)));
+}
+
+static void end_irq(unsigned int irq_nr)
+{
+
-+ unsigned long flags;
+ int ip = irq_nr - GROUP0_IRQ_BASE;
+ unsigned int intr_bit, group;
+ volatile unsigned int *addr;
+
+
-+ local_irq_save(flags);
+ if (irq_desc[irq_nr].status & (IRQ_DISABLED | IRQ_INPROGRESS)) {
+ printk("warning: end_irq %d did not enable (%x)\n",
+ irq_nr, irq_desc[irq_nr].status);
-+ } else if (ip<0) {
++ /* fall through; enable the interrupt
++ * -- It'll get stuck otherwise
++ */
++
++ }
++
++ if (ip<0) {
+ enable_local_irq(irq_nr);
+ } else {
+
@@ -409,7 +403,8 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub
+ break;
+
+ case MACH_ARUBA_AP65:
-+ case MACH_ARUBA_AP60:
++ case MACH_ARUBA_AP60:
++ default:
+ group = 0;
+
+ // calc interrupt bit within group
@@ -424,11 +419,10 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub
+ break;
+ }
+ }
-+ local_irq_restore(flags);
+}
+
+static struct hw_interrupt_type aruba_irq_type = {
-+ .typename = "IDT434",
++ .typename = "ARUBA",
+ .startup = startup_irq,
+ .shutdown = shutdown_irq,
+ .enable = aruba_enable_irq,
@@ -444,7 +438,6 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub
+ memset(irq_desc, 0, sizeof(irq_desc));
+ set_except_vector(0, idtIRQ);
+
-+
+ set_c0_status(0xFF00);
+
+ for (i = 0; i < RC32434_NR_IRQS; i++) {
@@ -454,17 +447,6 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub
+ irq_desc[i].handler = &aruba_irq_type;
+ spin_lock_init(&irq_desc[i].lock);
+ }
-+
-+ switch (mips_machtype) {
-+ case MACH_ARUBA_AP70:
-+ break;
-+ case MACH_ARUBA_AP65:
-+ case MACH_ARUBA_AP60:
-+ default:
-+ WRITE_MASK_MERLOT(intr_group_merlot[0].base_addr, 0);
-+ *((volatile unsigned long *)0xbc003014) = 0x10;
-+ break;
-+ }
+}
+
+/* Main Interrupt dispatcher */
@@ -475,7 +457,7 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub
+
+ if(cp0_cause == 0) {
+ printk("INTERRUPT(S) FIRED WHILE MASKED\n");
-+
++#ifdef ARUBA_DEBUG
+ // debuging use -- figure out which interrupt(s) fired
+ cp0_cause = read_c0_cause() & CAUSEF_IP;
+ while (cp0_cause) {
@@ -486,11 +468,10 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub
+ printk(" ---> MASKED IRQ %d\n",irq_nr);
+ cp0_cause &= ~(1 << intr_bit);
+ }
-+
++#endif
+ return;
+ }
+
-+
+ switch (mips_machtype) {
+ case MACH_ARUBA_AP70:
+ if ((ip = (cp0_cause & 0x7c00))) {
@@ -514,7 +495,8 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub
+ pend = READ_PEND_MERLOT(addr);
+ pend &= READ_MASK_MERLOT(addr); // only unmasked interrupts
+ /* handle one misc interrupt at a time */
-+ while (pend) {
++ while (pend)
++ {
+ unsigned long intr_bit;
+ unsigned int irq_nr;
+
@@ -524,9 +506,9 @@ diff -Nur linux-2.6.15/arch/mips/aruba/irq.c linux-2.6.15-openwrt/arch/mips/arub
+ do_IRQ(irq_nr, regs);
+ pend &= ~(1 << intr_bit);
+ }
-+ }
-+ if (cp0_cause & 0x3c00) { // irq 2-5
-+ while (cp0_cause) {
++ } else if (cp0_cause & 0x3c00) { // irq 2-5
++ while (cp0_cause)
++ {
+ unsigned long intr_bit;
+ unsigned int irq_nr;
+
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-04 07:16:05 +0000