X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=3sys;a=blobdiff_plain;f=sys1%2Fkern%2Fsrc%2Fdesc.c;fp=sys1%2Fkern%2Fsrc%2Fdesc.c;h=9af939e28c278df6c5ef682bac1520535a313934;hp=d02c5fc2decbaa06fd6acae5660424d1fb3c7c1f;hb=e05574a9511e724651361905620f96666c7acb04;hpb=aac04321fda4094e8623a10ed39d2916ada40ccf

diff --git a/sys1/kern/src/desc.c b/sys1/kern/src/desc.c
index d02c5fc..9af939e 100644
--- a/sys1/kern/src/desc.c
+++ b/sys1/kern/src/desc.c
@@ -22,6 +22,11 @@
 #define SEG_DEF			0x00400000
 
 
+#define GATE_TYPE_INTR	0x0e00
+#define GATE_TYPE_TRAP	0x0f00
+#define GATE_PRESENT	0x8000
+
+
 void desc_seg(struct desc *desc, int type, uint32_t base, uint32_t limit, int dpl)
 {
 	if(type == SEG_NULL) {
@@ -43,3 +48,13 @@ void desc_seg(struct desc *desc, int type, uint32_t base, uint32_t limit, int dp
 		break;
 	}
 }
+
+
+
+void desc_intr(struct desc *desc, int type, uint16_t sel, uint32_t offs, int dpl)
+{
+	uint32_t gate_type[] = { GATE_TYPE_INTR, GATE_TYPE_TRAP };
+
+	desc->d[0] = (offs & 0xffff) | ((uint32_t)sel << 16);
+	desc->d[1] = (offs & 0xffff0000) | GATE_PRESENT | (dpl << 13) | gate_type[type];
+}