- Small step forward Linux boots and almost works...
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@795 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
diff --git a/src/arch/i386/smp/ioapic.c b/src/arch/i386/smp/ioapic.c
new file mode 100644
index 0000000..344b30d
--- /dev/null
+++ b/src/arch/i386/smp/ioapic.c
@@ -0,0 +1,86 @@
+#include <console/console.h>
+#include <arch/ioapic.h>
+
+/* TODO: this must move to chip/intel */
+/* 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 nvram = 0xfec00000;
+ volatile unsigned long *l;
+ struct ioapicreg *a = ioapicregvalues;
+
+ l = (unsigned long *) nvram;
+#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 < sizeof(ioapicregvalues) / sizeof(ioapicregvalues[0]);
+ 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);
+ }
+}