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#include <console/console.h>
#include <arch/ioapic.h>
/* we have to do more than we thought. I assumed Linux would do all the
* interesting parts, and I was wrong.
*/
struct ioapicreg {
unsigned int reg;
unsigned int value_low, value_high;
};
struct ioapicreg ioapicregvalues[] = {
#define ALL (0xff << 24)
#define NONE (0)
#define DISABLED (1 << 16)
#define ENABLED (0 << 16)
#define TRIGGER_EDGE (0 << 15)
#define TRIGGER_LEVEL (1 << 15)
#define POLARITY_HIGH (0 << 13)
#define POLARITY_LOW (1 << 13)
#define PHYSICAL_DEST (0 << 11)
#define LOGICAL_DEST (1 << 11)
#define ExtINT (7 << 8)
#define NMI (4 << 8)
#define SMI (2 << 8)
#define INT (1 << 8)
/* mask, trigger, polarity, destination, delivery, vector */
{0x00, DISABLED, NONE},
{0x01, DISABLED, NONE},
{0x02, DISABLED, NONE},
{0x03, DISABLED, NONE},
{0x04, DISABLED, NONE},
{0x05, DISABLED, NONE},
{0x06, DISABLED, NONE},
{0x07, DISABLED, NONE},
{0x08, DISABLED, NONE},
{0x09, DISABLED, NONE},
{0x0a, DISABLED, NONE},
{0x0b, DISABLED, NONE},
{0x0c, DISABLED, NONE},
{0x0d, DISABLED, NONE},
{0x0e, DISABLED, NONE},
{0x0f, DISABLED, NONE},
{0x10, DISABLED, NONE},
{0x11, DISABLED, NONE},
{0x12, DISABLED, NONE},
{0x13, DISABLED, NONE},
{0x14, DISABLED, NONE},
{0x14, DISABLED, NONE},
{0x15, DISABLED, NONE},
{0x16, DISABLED, NONE},
{0x17, DISABLED, NONE},
};
void setup_ioapic(void)
{
int i;
unsigned long value_low, value_high;
unsigned long ioapicaddr = 0xfec00000;
volatile unsigned long *l;
struct ioapicreg *a = ioapicregvalues;
l = (unsigned long *) ioapicaddr;
#if defined(i786)
/* For the pentium 4 and above apic deliver their interrupts
* on the front side bus, enable that.
*/
l[0] = 0x03;
l[4] = 1;
#endif /* i786 */
for (i = 0; i < ARRAY_SIZE(ioapicregvalues);
i++, a++) {
l[0] = (a->reg * 2) + 0x10;
l[4] = a->value_low;
value_low = l[4];
l[0] = (a->reg *2) + 0x11;
l[4] = a->value_high;
value_high = l[4];
if ((i==0) && (value_low == 0xffffffff)) {
printk_warning("IO APIC not responding.\n");
return;
}
printk_spew("for IRQ, reg 0x%08x value 0x%08x 0x%08x\n",
a->reg, a->value_low, a->value_high);
}
}
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