svn rev.329より移動。

[chnosproject/CHNOSProject.git] / CHNOSProject / chnos / tolset_chn_000 / chnos_008 / chnos / gdtidt.c

diff --git a/CHNOSProject/chnos/tolset_chn_000/chnos_008/chnos/gdtidt.c b/CHNOSProject/chnos/tolset_chn_000/chnos_008/chnos/gdtidt.c
new file mode 100644 (file)
index 0000000..c55bf48
--- /dev/null
+++ b/CHNOSProject/chnos/tolset_chn_000/chnos_008/chnos/gdtidt.c
@@ -0,0 +1,83 @@
+\r
+#include "core.h"\r
+\r
+void init_gdtidt(void)\r
+{\r
+       int i;\r
+       IO_SegmentDescriptor *gdt = system.io.mem.segment.gdt;\r
+       IO_GateDescriptor *idt = system.io.interrupt.idt;\r
+\r
+       for(i =0; i < 8192; i++){\r
+               set_segmdesc(gdt + i, 0, 0, 0);\r
+       }\r
+       set_segmdesc(gdt + 1, 0xffffffff, 0x00000000, AR_DATA32_RW);\r
+       set_segmdesc(gdt + 2, 0x0007ffff, 0x00280000, AR_CODE32_ER);\r
+       load_gdtr(0xffff, (int)gdt);\r
+       \r
+       for(i = 0; i < 256; i++) {\r
+               set_gatedesc(idt + i, 0, 0, 0);\r
+       }\r
+       load_idtr(0x7ff, (int)idt);\r
+\r
+       set_gatedesc(idt+0x00, (int) asm_inthandler00, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x01, (int) asm_inthandler01, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x02, (int) asm_inthandler02, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x03, (int) asm_inthandler03, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x04, (int) asm_inthandler04, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x05, (int) asm_inthandler05, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x06, (int) asm_inthandler06, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x07, (int) asm_inthandler07, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x08, (int) asm_inthandler08, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x09, (int) asm_inthandler09, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x0a, (int) asm_inthandler0a, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x0b, (int) asm_inthandler0b, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x0c, (int) asm_inthandler0c, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x0d, (int) asm_inthandler0d, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x0e, (int) asm_inthandler0e, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x0f, (int) asm_inthandler0f, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x10, (int) asm_inthandler10, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x11, (int) asm_inthandler11, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x12, (int) asm_inthandler12, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x13, (int) asm_inthandler13, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x14, (int) asm_inthandler14, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x15, (int) asm_inthandler15, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x16, (int) asm_inthandler16, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x17, (int) asm_inthandler17, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x18, (int) asm_inthandler18, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x19, (int) asm_inthandler19, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x1a, (int) asm_inthandler1a, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x1b, (int) asm_inthandler1b, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x1c, (int) asm_inthandler1c, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x1d, (int) asm_inthandler1d, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x1e, (int) asm_inthandler1e, 2 * 8, AR_INTGATE32);\r
+       set_gatedesc(idt+0x1f, (int) asm_inthandler1f, 2 * 8, AR_INTGATE32);\r
+\r
+       set_gatedesc(idt+0x40, (int) asm_hrb_api, 2 * 8, AR_INTGATE32 + AR_APP);\r
+\r
+       return;\r
+}\r
+\r
+void set_segmdesc(IO_SegmentDescriptor *sd, uint limit, int base, int ar)\r
+{\r
+       if(limit > 0xfffff){\r
+               ar |= 0x8000;\r
+               limit = limit >> 12;\r
+       }\r
+       sd->limit_low           = limit & 0xffff;\r
+       sd->base_low            = base & 0xffff;\r
+       sd->base_mid            = (base >> 16) & 0xff;\r
+       sd->access_right        = ar & 0xff;\r
+       sd->limit_high          = ((limit >> 16) & 0x0f) | ((ar >> 8) & 0xf0);\r
+       sd->base_high           = (base >> 24) & 0xff;\r
+       return;\r
+}\r
+\r
+void set_gatedesc(IO_GateDescriptor *gd, int offset, int selector, int ar)\r
+{\r
+       gd->offset_low          = offset & 0xffff;\r
+       gd->selector            = selector;\r
+       gd->dw_count            = (ar >> 8) & 0xff;\r
+       gd->access_right        = ar & 0xff;\r
+       gd->offset_high         = (offset >> 16) & 0xffff;\r
+       return;\r
+}\r