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Diffstat (limited to 'arch/mips/mips-boards/malta/malta_int.c')
-rw-r--r--arch/mips/mips-boards/malta/malta_int.c153
1 files changed, 109 insertions, 44 deletions
diff --git a/arch/mips/mips-boards/malta/malta_int.c b/arch/mips/mips-boards/malta/malta_int.c
index dd2db35966bc..d06dc5ad6c9e 100644
--- a/arch/mips/mips-boards/malta/malta_int.c
+++ b/arch/mips/mips-boards/malta/malta_int.c
@@ -30,6 +30,7 @@
#include <linux/random.h>
#include <asm/i8259.h>
+#include <asm/irq_cpu.h>
#include <asm/io.h>
#include <asm/mips-boards/malta.h>
#include <asm/mips-boards/maltaint.h>
@@ -37,8 +38,10 @@
#include <asm/gt64120.h>
#include <asm/mips-boards/generic.h>
#include <asm/mips-boards/msc01_pci.h>
+#include <asm/msc01_ic.h>
extern asmlinkage void mipsIRQ(void);
+extern void mips_timer_interrupt(void);
static DEFINE_SPINLOCK(mips_irq_lock);
@@ -54,6 +57,7 @@ static inline int mips_pcibios_iack(void)
switch(mips_revision_corid) {
case MIPS_REVISION_CORID_CORE_MSC:
case MIPS_REVISION_CORID_CORE_FPGA2:
+ case MIPS_REVISION_CORID_CORE_FPGA3:
case MIPS_REVISION_CORID_CORE_EMUL_MSC:
MSC_READ(MSC01_PCI_IACK, irq);
irq &= 0xff;
@@ -91,88 +95,86 @@ static inline int mips_pcibios_iack(void)
return irq;
}
-static inline int get_int(int *irq)
+static inline int get_int(void)
{
unsigned long flags;
-
+ int irq;
spin_lock_irqsave(&mips_irq_lock, flags);
- *irq = mips_pcibios_iack();
+ irq = mips_pcibios_iack();
/*
- * IRQ7 is used to detect spurious interrupts.
- * The interrupt acknowledge cycle returns IRQ7, if no
- * interrupts is requested.
- * We can differentiate between this situation and a
- * "Normal" IRQ7 by reading the ISR.
+ * The only way we can decide if an interrupt is spurious
+ * is by checking the 8259 registers. This needs a spinlock
+ * on an SMP system, so leave it up to the generic code...
*/
- if (*irq == 7)
- {
- outb(PIIX4_OCW3_SEL | PIIX4_OCW3_ISR,
- PIIX4_ICTLR1_OCW3);
- if (!(inb(PIIX4_ICTLR1_OCW3) & (1 << 7))) {
- spin_unlock_irqrestore(&mips_irq_lock, flags);
- printk("We got a spurious interrupt from PIIX4.\n");
- atomic_inc(&irq_err_count);
- return -1; /* Spurious interrupt. */
- }
- }
spin_unlock_irqrestore(&mips_irq_lock, flags);
- return 0;
+ return irq;
}
void malta_hw0_irqdispatch(struct pt_regs *regs)
{
int irq;
- if (get_int(&irq))
- return; /* interrupt has already been cleared */
+ irq = get_int();
+ if (irq < 0)
+ return; /* interrupt has already been cleared */
- do_IRQ(irq, regs);
+ do_IRQ(MALTA_INT_BASE+irq, regs);
}
void corehi_irqdispatch(struct pt_regs *regs)
{
- unsigned int data,datahi;
-
- /* Mask out corehi interrupt. */
- clear_c0_status(IE_IRQ3);
+ unsigned int intrcause,datalo,datahi;
+ unsigned int pcimstat, intisr, inten, intpol, intedge, intsteer, pcicmd, pcibadaddr;
printk("CoreHI interrupt, shouldn't happen, so we die here!!!\n");
printk("epc : %08lx\nStatus: %08lx\nCause : %08lx\nbadVaddr : %08lx\n"
, regs->cp0_epc, regs->cp0_status, regs->cp0_cause, regs->cp0_badvaddr);
+
+ /* Read all the registers and then print them as there is a
+ problem with interspersed printk's upsetting the Bonito controller.
+ Do it for the others too.
+ */
+
switch(mips_revision_corid) {
case MIPS_REVISION_CORID_CORE_MSC:
case MIPS_REVISION_CORID_CORE_FPGA2:
- case MIPS_REVISION_CORID_CORE_EMUL_MSC:
+ case MIPS_REVISION_CORID_CORE_FPGA3:
+ case MIPS_REVISION_CORID_CORE_EMUL_MSC:
+ ll_msc_irq(regs);
break;
case MIPS_REVISION_CORID_QED_RM5261:
case MIPS_REVISION_CORID_CORE_LV:
case MIPS_REVISION_CORID_CORE_FPGA:
case MIPS_REVISION_CORID_CORE_FPGAR2:
- data = GT_READ(GT_INTRCAUSE_OFS);
- printk("GT_INTRCAUSE = %08x\n", data);
- data = GT_READ(GT_CPUERR_ADDRLO_OFS);
+ intrcause = GT_READ(GT_INTRCAUSE_OFS);
+ datalo = GT_READ(GT_CPUERR_ADDRLO_OFS);
datahi = GT_READ(GT_CPUERR_ADDRHI_OFS);
- printk("GT_CPUERR_ADDR = %02x%08x\n", datahi, data);
+ printk("GT_INTRCAUSE = %08x\n", intrcause);
+ printk("GT_CPUERR_ADDR = %02x%08x\n", datahi, datalo);
break;
case MIPS_REVISION_CORID_BONITO64:
case MIPS_REVISION_CORID_CORE_20K:
case MIPS_REVISION_CORID_CORE_EMUL_BON:
- data = BONITO_INTISR;
- printk("BONITO_INTISR = %08x\n", data);
- data = BONITO_INTEN;
- printk("BONITO_INTEN = %08x\n", data);
- data = BONITO_INTPOL;
- printk("BONITO_INTPOL = %08x\n", data);
- data = BONITO_INTEDGE;
- printk("BONITO_INTEDGE = %08x\n", data);
- data = BONITO_INTSTEER;
- printk("BONITO_INTSTEER = %08x\n", data);
- data = BONITO_PCICMD;
- printk("BONITO_PCICMD = %08x\n", data);
+ pcibadaddr = BONITO_PCIBADADDR;
+ pcimstat = BONITO_PCIMSTAT;
+ intisr = BONITO_INTISR;
+ inten = BONITO_INTEN;
+ intpol = BONITO_INTPOL;
+ intedge = BONITO_INTEDGE;
+ intsteer = BONITO_INTSTEER;
+ pcicmd = BONITO_PCICMD;
+ printk("BONITO_INTISR = %08x\n", intisr);
+ printk("BONITO_INTEN = %08x\n", inten);
+ printk("BONITO_INTPOL = %08x\n", intpol);
+ printk("BONITO_INTEDGE = %08x\n", intedge);
+ printk("BONITO_INTSTEER = %08x\n", intsteer);
+ printk("BONITO_PCICMD = %08x\n", pcicmd);
+ printk("BONITO_PCIBADADDR = %08x\n", pcibadaddr);
+ printk("BONITO_PCIMSTAT = %08x\n", pcimstat);
break;
}
@@ -180,8 +182,71 @@ void corehi_irqdispatch(struct pt_regs *regs)
die("CoreHi interrupt", regs);
}
+static struct irqaction i8259irq = {
+ .handler = no_action,
+ .name = "XT-PIC cascade"
+};
+
+static struct irqaction corehi_irqaction = {
+ .handler = no_action,
+ .name = "CoreHi"
+};
+
+msc_irqmap_t __initdata msc_irqmap[] = {
+ {MSC01C_INT_TMR, MSC01_IRQ_EDGE, 0},
+ {MSC01C_INT_PCI, MSC01_IRQ_LEVEL, 0},
+};
+int __initdata msc_nr_irqs = sizeof(msc_irqmap)/sizeof(msc_irqmap_t);
+
+msc_irqmap_t __initdata msc_eicirqmap[] = {
+ {MSC01E_INT_SW0, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_SW1, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_I8259A, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_SMI, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_COREHI, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_CORELO, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_TMR, MSC01_IRQ_EDGE, 0},
+ {MSC01E_INT_PCI, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_PERFCTR, MSC01_IRQ_LEVEL, 0},
+ {MSC01E_INT_CPUCTR, MSC01_IRQ_LEVEL, 0}
+};
+int __initdata msc_nr_eicirqs = sizeof(msc_eicirqmap)/sizeof(msc_irqmap_t);
+
void __init arch_init_irq(void)
{
set_except_vector(0, mipsIRQ);
init_i8259_irqs();
+
+ if (!cpu_has_veic)
+ mips_cpu_irq_init (MIPSCPU_INT_BASE);
+
+ switch(mips_revision_corid) {
+ case MIPS_REVISION_CORID_CORE_MSC:
+ case MIPS_REVISION_CORID_CORE_FPGA2:
+ case MIPS_REVISION_CORID_CORE_FPGA3:
+ case MIPS_REVISION_CORID_CORE_EMUL_MSC:
+ if (cpu_has_veic)
+ init_msc_irqs (MSC01E_INT_BASE, msc_eicirqmap, msc_nr_eicirqs);
+ else
+ init_msc_irqs (MSC01C_INT_BASE, msc_irqmap, msc_nr_irqs);
+ }
+
+ if (cpu_has_veic) {
+ set_vi_handler (MSC01E_INT_I8259A, malta_hw0_irqdispatch);
+ set_vi_handler (MSC01E_INT_COREHI, corehi_irqdispatch);
+ setup_irq (MSC01E_INT_BASE+MSC01E_INT_I8259A, &i8259irq);
+ setup_irq (MSC01E_INT_BASE+MSC01E_INT_COREHI, &corehi_irqaction);
+ }
+ else if (cpu_has_vint) {
+ set_vi_handler (MIPSCPU_INT_I8259A, malta_hw0_irqdispatch);
+ set_vi_handler (MIPSCPU_INT_COREHI, corehi_irqdispatch);
+
+ setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_I8259A, &i8259irq);
+ setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_COREHI, &corehi_irqaction);
+ }
+ else {
+ set_except_vector(0, mipsIRQ);
+ setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_I8259A, &i8259irq);
+ setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_COREHI, &corehi_irqaction);
+ }
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.