#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kernel.h>
-#include <linux/spinlock.h>
#include <asm/i8259.h>
#include <asm/io.h>
#include <asm/sni.h>
-spinlock_t pciasic_lock = SPIN_LOCK_UNLOCKED;
-
-extern asmlinkage void sni_rm200_pci_handle_int(void);
-
static void enable_pciasic_irq(unsigned int irq)
{
unsigned int mask = 1 << (irq - PCIMT_IRQ_INT2);
- unsigned long flags;
- spin_lock_irqsave(&pciasic_lock, flags);
*(volatile u8 *) PCIMT_IRQSEL |= mask;
- spin_unlock_irqrestore(&pciasic_lock, flags);
}
-static unsigned int startup_pciasic_irq(unsigned int irq)
-{
- enable_pciasic_irq(irq);
- return 0; /* never anything pending */
-}
-
-#define shutdown_pciasic_irq disable_pciasic_irq
-
void disable_pciasic_irq(unsigned int irq)
{
unsigned int mask = ~(1 << (irq - PCIMT_IRQ_INT2));
- unsigned long flags;
- spin_lock_irqsave(&pciasic_lock, flags);
*(volatile u8 *) PCIMT_IRQSEL &= mask;
- spin_unlock_irqrestore(&pciasic_lock, flags);
}
-#define mask_and_ack_pciasic_irq disable_pciasic_irq
-
static void end_pciasic_irq(unsigned int irq)
{
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
enable_pciasic_irq(irq);
}
-static struct hw_interrupt_type pciasic_irq_type = {
- "ASIC-PCI",
- startup_pciasic_irq,
- shutdown_pciasic_irq,
- enable_pciasic_irq,
- disable_pciasic_irq,
- mask_and_ack_pciasic_irq,
- end_pciasic_irq,
- NULL
+static struct irq_chip pciasic_irq_type = {
+ .typename = "ASIC-PCI",
+ .ack = disable_pciasic_irq,
+ .mask = disable_pciasic_irq,
+ .mask_ack = disable_pciasic_irq,
+ .unmask = enable_pciasic_irq,
+ .end = end_pciasic_irq,
};
/*
* hwint0 should deal with MP agent, ASIC PCI, EISA NMI and debug
* button interrupts. Later ...
*/
-void pciasic_hwint0(struct pt_regs *regs)
+static void pciasic_hwint0(void)
{
panic("Received int0 but no handler yet ...");
}
/* This interrupt was used for the com1 console on the first prototypes. */
-void pciasic_hwint2(struct pt_regs *regs)
+static void pciasic_hwint2(void)
{
/* I think this shouldn't happen on production machines. */
panic("hwint2 and no handler yet");
}
/* hwint5 is the r4k count / compare interrupt */
-void pciasic_hwint5(struct pt_regs *regs)
+static void pciasic_hwint5(void)
{
panic("hwint5 and no handler yet");
}
/*
* hwint 1 deals with EISA and SCSI interrupts,
- *
+ *
* The EISA_INT bit in CSITPEND is high active, all others are low active.
*/
-void pciasic_hwint1(struct pt_regs *regs)
+static void pciasic_hwint1(void)
{
u8 pend = *(volatile char *)PCIMT_CSITPEND;
unsigned long flags;
if (unlikely(irq < 0))
return;
- do_IRQ(irq, regs);
+ do_IRQ(irq);
}
if (!(pend & IT_SCSI)) {
flags = read_c0_status();
clear_c0_status(ST0_IM);
- do_IRQ(PCIMT_IRQ_SCSI, regs);
+ do_IRQ(PCIMT_IRQ_SCSI);
write_c0_status(flags);
}
}
/*
* hwint 3 should deal with the PCI A - D interrupts,
*/
-void pciasic_hwint3(struct pt_regs *regs)
+static void pciasic_hwint3(void)
{
u8 pend = *(volatile char *)PCIMT_CSITPEND;
int irq;
pend &= (IT_INTA | IT_INTB | IT_INTC | IT_INTD);
clear_c0_status(IE_IRQ3);
irq = PCIMT_IRQ_INT2 + ls1bit8(pend);
- do_IRQ(irq, regs);
+ do_IRQ(irq);
set_c0_status(IE_IRQ3);
}
/*
* hwint 4 is used for only the onboard PCnet 32.
*/
-void pciasic_hwint4(struct pt_regs *regs)
+static void pciasic_hwint4(void)
{
clear_c0_status(IE_IRQ4);
- do_IRQ(PCIMT_IRQ_ETHERNET, regs);
+ do_IRQ(PCIMT_IRQ_ETHERNET);
set_c0_status(IE_IRQ4);
}
-void __init init_pciasic(void)
+asmlinkage void plat_irq_dispatch(void)
{
- unsigned long flags;
+ unsigned int pending = read_c0_status() & read_c0_cause();
+ static unsigned char led_cache;
+
+ *(volatile unsigned char *) PCIMT_CSLED = ++led_cache;
+
+ if (pending & 0x0800)
+ pciasic_hwint1();
+ else if (pending & 0x4000)
+ pciasic_hwint4();
+ else if (pending & 0x2000)
+ pciasic_hwint3();
+ else if (pending & 0x1000)
+ pciasic_hwint2();
+ else if (pending & 0x8000)
+ pciasic_hwint5();
+ else if (pending & 0x0400)
+ pciasic_hwint0();
+}
- spin_lock_irqsave(&pciasic_lock, flags);
+void __init init_pciasic(void)
+{
* (volatile u8 *) PCIMT_IRQSEL =
IT_EISA | IT_INTA | IT_INTB | IT_INTC | IT_INTD;
- spin_unlock_irqrestore(&pciasic_lock, flags);
}
/*
* driver compatibility reasons interrupts 0 - 15 to be the i8295
* interrupts even if the hardware uses a different interrupt numbering.
*/
-void __init init_IRQ (void)
+void __init arch_init_irq(void)
{
int i;
- set_except_vector(0, sni_rm200_pci_handle_int);
-
- init_generic_irq();
init_i8259_irqs(); /* Integrated i8259 */
init_pciasic();
/* Actually we've got more interrupts to handle ... */
- for (i = PCIMT_IRQ_INT2; i <= PCIMT_IRQ_ETHERNET; i++) {
- irq_desc[i].status = IRQ_DISABLED;
- irq_desc[i].action = 0;
- irq_desc[i].depth = 1;
- irq_desc[i].handler = &pciasic_irq_type;
- }
+ for (i = PCIMT_IRQ_INT2; i <= PCIMT_IRQ_ETHERNET; i++)
+ set_irq_chip(i, &pciasic_irq_type);
change_c0_status(ST0_IM, IE_IRQ1|IE_IRQ2|IE_IRQ3|IE_IRQ4);
}