iosapic.h

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#ifndef __ASM_IA64_IOSAPIC_H
#define __ASM_IA64_IOSAPIC_H

#define IOSAPIC_REG_SELECT  0x0
#define IOSAPIC_WINDOW      0x10
#define IOSAPIC_EOI     0x40

#define IOSAPIC_VERSION     0x1

/*
 * Redirection table entry
 */
#define IOSAPIC_RTE_LOW(i)  (0x10+i*2)
#define IOSAPIC_RTE_HIGH(i) (0x11+i*2)

#define IOSAPIC_DEST_SHIFT      16

/*
 * Delivery mode
 */
#define IOSAPIC_DELIVERY_SHIFT      8
#define IOSAPIC_FIXED           0x0
#define IOSAPIC_LOWEST_PRIORITY 0x1
#define IOSAPIC_PMI         0x2
#define IOSAPIC_NMI         0x4
#define IOSAPIC_INIT            0x5
#define IOSAPIC_EXTINT          0x7

/*
 * Interrupt polarity
 */
#define IOSAPIC_POLARITY_SHIFT      13
#define IOSAPIC_POL_HIGH        0
#define IOSAPIC_POL_LOW     1

/*
 * Trigger mode
 */
#define IOSAPIC_TRIGGER_SHIFT       15
#define IOSAPIC_EDGE            0
#define IOSAPIC_LEVEL           1

/*
 * Mask bit
 */

#define IOSAPIC_MASK_SHIFT      16
#define IOSAPIC_MASK            (1<<IOSAPIC_MASK_SHIFT)

#define IOSAPIC_VECTOR_MASK     0xffffff00

#ifndef __ASSEMBLY__

#ifdef CONFIG_IOSAPIC

#define NR_IOSAPICS         256

#ifdef CONFIG_PARAVIRT_GUEST
#include <asm/paravirt.h>
#else
#define iosapic_pcat_compat_init    ia64_native_iosapic_pcat_compat_init
#define __iosapic_read          __ia64_native_iosapic_read
#define __iosapic_write         __ia64_native_iosapic_write
#define iosapic_get_irq_chip        ia64_native_iosapic_get_irq_chip
#endif

extern void __init ia64_native_iosapic_pcat_compat_init(void);
extern struct irq_chip *ia64_native_iosapic_get_irq_chip(unsigned long trigger);

static inline unsigned int
__ia64_native_iosapic_read(char __iomem *iosapic, unsigned int reg)
{
    writel(reg, iosapic + IOSAPIC_REG_SELECT);
    return readl(iosapic + IOSAPIC_WINDOW);
}

static inline void
__ia64_native_iosapic_write(char __iomem *iosapic, unsigned int reg, u32 val)
{
    writel(reg, iosapic + IOSAPIC_REG_SELECT);
    writel(val, iosapic + IOSAPIC_WINDOW);
}

static inline void iosapic_eoi(char __iomem *iosapic, u32 vector)
{
    writel(vector, iosapic + IOSAPIC_EOI);
}

extern void __init iosapic_system_init (int pcat_compat);
extern int __devinit iosapic_init (unsigned long address,
                    unsigned int gsi_base);
#ifdef CONFIG_HOTPLUG
extern int iosapic_remove (unsigned int gsi_base);
#else
#define iosapic_remove(gsi_base)                (-EINVAL)
#endif /* CONFIG_HOTPLUG */
extern int gsi_to_irq (unsigned int gsi);
extern int iosapic_register_intr (unsigned int gsi, unsigned long polarity,
                  unsigned long trigger);
extern void iosapic_unregister_intr (unsigned int irq);
extern void __devinit iosapic_override_isa_irq (unsigned int isa_irq, unsigned int gsi,
                      unsigned long polarity,
                      unsigned long trigger);
extern int __init iosapic_register_platform_intr (u32 int_type,
                       unsigned int gsi,
                       int pmi_vector,
                       u16 eid, u16 id,
                       unsigned long polarity,
                       unsigned long trigger);

#ifdef CONFIG_NUMA
extern void __devinit map_iosapic_to_node (unsigned int, int);
#endif
#else
#define iosapic_system_init(pcat_compat)            do { } while (0)
#define iosapic_init(address,gsi_base)              (-EINVAL)
#define iosapic_remove(gsi_base)                (-ENODEV)
#define iosapic_register_intr(gsi,polarity,trigger)     (gsi)
#define iosapic_unregister_intr(irq)                do { } while (0)
#define iosapic_override_isa_irq(isa_irq,gsi,polarity,trigger)  do { } while (0)
#define iosapic_register_platform_intr(type,gsi,pmi,eid,id, \
    polarity,trigger)                   (gsi)
#endif

# endif /* !__ASSEMBLY__ */
#endif /* __ASM_IA64_IOSAPIC_H */