From 4f12bfe5a498747a9a66f135a67aa8e1caa819dc Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Mon, 21 Mar 2005 18:59:38 +0000 Subject: HUB interrupts are allocated per node, not per slice. Make manipulation of the interrupt mask register atomic by disabling interrupts. Signed-off-by: Ralf Baechle --- arch/mips/sgi-ip27/ip27-irq.c | 50 +++++++++++++++++++++++-------------------- 1 file changed, 27 insertions(+), 23 deletions(-) (limited to 'arch/mips/sgi-ip27/ip27-irq.c') diff --git a/arch/mips/sgi-ip27/ip27-irq.c b/arch/mips/sgi-ip27/ip27-irq.c index 61817a18aed..5d374e6ce63 100644 --- a/arch/mips/sgi-ip27/ip27-irq.c +++ b/arch/mips/sgi-ip27/ip27-irq.c @@ -74,14 +74,15 @@ extern int irq_to_slot[]; static inline int alloc_level(int cpu, int irq) { + struct hub_data *hub = hub_data(cpu_to_node(cpu)); struct slice_data *si = cpu_data[cpu].data; - int level; /* pre-allocated entries */ + int level; - level = find_first_zero_bit(si->irq_alloc_mask, LEVELS_PER_SLICE); + level = find_first_zero_bit(hub->irq_alloc_mask, LEVELS_PER_SLICE); if (level >= LEVELS_PER_SLICE) panic("Cpu %d flooded with devices\n", cpu); - __set_bit(level, si->irq_alloc_mask); + __set_bit(level, hub->irq_alloc_mask); si->level_to_irq[level] = irq; return level; @@ -216,9 +217,11 @@ static int intr_connect_level(int cpu, int bit) { nasid_t nasid = COMPACT_TO_NASID_NODEID(cpu_to_node(cpu)); struct slice_data *si = cpu_data[cpu].data; + unsigned long flags; - __set_bit(bit, si->irq_enable_mask); + set_bit(bit, si->irq_enable_mask); + local_irq_save(flags); if (!cputoslice(cpu)) { REMOTE_HUB_S(nasid, PI_INT_MASK0_A, si->irq_enable_mask[0]); REMOTE_HUB_S(nasid, PI_INT_MASK1_A, si->irq_enable_mask[1]); @@ -226,6 +229,7 @@ static int intr_connect_level(int cpu, int bit) REMOTE_HUB_S(nasid, PI_INT_MASK0_B, si->irq_enable_mask[0]); REMOTE_HUB_S(nasid, PI_INT_MASK1_B, si->irq_enable_mask[1]); } + local_irq_restore(flags); return 0; } @@ -235,7 +239,7 @@ static int intr_disconnect_level(int cpu, int bit) nasid_t nasid = COMPACT_TO_NASID_NODEID(cpu_to_node(cpu)); struct slice_data *si = cpu_data[cpu].data; - __clear_bit(bit, si->irq_enable_mask); + clear_bit(bit, si->irq_enable_mask); if (!cputoslice(cpu)) { REMOTE_HUB_S(nasid, PI_INT_MASK0_A, si->irq_enable_mask[0]); @@ -298,6 +302,7 @@ static unsigned int startup_bridge_irq(unsigned int irq) static void shutdown_bridge_irq(unsigned int irq) { struct bridge_controller *bc = IRQ_TO_BRIDGE(irq); + struct hub_data *hub = hub_data(cpu_to_node(bc->irq_cpu)); bridge_t *bridge = bc->base; struct slice_data *si = cpu_data[bc->irq_cpu].data; int pin, swlevel; @@ -313,7 +318,7 @@ static void shutdown_bridge_irq(unsigned int irq) swlevel = find_level(&cpu, irq); intr_disconnect_level(cpu, swlevel); - __clear_bit(swlevel, si->irq_alloc_mask); + __clear_bit(swlevel, hub->irq_alloc_mask); si->level_to_irq[swlevel] = -1; bridge->b_int_enable &= ~(1 << pin); @@ -433,25 +438,24 @@ void install_ipi(void) int slice = LOCAL_HUB_L(PI_CPU_NUM); int cpu = smp_processor_id(); struct slice_data *si = cpu_data[cpu].data; - hubreg_t mask, set; + struct hub_data *hub = hub_data(cpu_to_node(cpu)); + int resched, call; + + resched = CPU_RESCHED_A_IRQ + slice; + __set_bit(resched, hub->irq_alloc_mask); + __set_bit(resched, si->irq_enable_mask); + LOCAL_HUB_CLR_INTR(resched); + + call = CPU_CALL_A_IRQ + slice; + __set_bit(call, hub->irq_alloc_mask); + __set_bit(call, si->irq_enable_mask); + LOCAL_HUB_CLR_INTR(call); if (slice == 0) { - LOCAL_HUB_CLR_INTR(CPU_RESCHED_A_IRQ); - LOCAL_HUB_CLR_INTR(CPU_CALL_A_IRQ); - mask = LOCAL_HUB_L(PI_INT_MASK0_A); /* Slice A */ - set = (1UL << CPU_RESCHED_A_IRQ) | (1UL << CPU_CALL_A_IRQ); - mask |= set; - si->irq_enable_mask[0] |= set; - si->irq_alloc_mask[0] |= set; - LOCAL_HUB_S(PI_INT_MASK0_A, mask); + LOCAL_HUB_S(PI_INT_MASK0_A, si->irq_enable_mask[0]); + LOCAL_HUB_S(PI_INT_MASK1_A, si->irq_enable_mask[1]); } else { - LOCAL_HUB_CLR_INTR(CPU_RESCHED_B_IRQ); - LOCAL_HUB_CLR_INTR(CPU_CALL_B_IRQ); - mask = LOCAL_HUB_L(PI_INT_MASK0_B); /* Slice B */ - set = (1UL << CPU_RESCHED_B_IRQ) | (1UL << CPU_CALL_B_IRQ); - mask |= set; - si->irq_enable_mask[1] |= set; - si->irq_alloc_mask[1] |= set; - LOCAL_HUB_S(PI_INT_MASK0_B, mask); + LOCAL_HUB_S(PI_INT_MASK0_B, si->irq_enable_mask[0]); + LOCAL_HUB_S(PI_INT_MASK1_B, si->irq_enable_mask[1]); } } -- cgit v1.2.3