| 0,0 → 1,152 |
|---|
| /* |
| * Copyright (C) 2001-2004 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef __PM_H__ |
| #define __PM_H__ |
| |
| #define IDT_ITEMS 64 |
| #define GDT_ITEMS 6 |
| |
| #define NULL_DES 0 |
| #define KTEXT_DES 1 |
| #define KDATA_DES 2 |
| #define UTEXT_DES 3 |
| #define UDATA_DES 4 |
| #define TSS_DES 5 |
| |
| #define selector(des) ((des)<<3) |
| |
| #define PL_KERNEL 0 |
| #define PL_USER 3 |
| |
| #define AR_PRESENT (1<<7) |
| #define AR_DATA (2<<3) |
| #define AR_CODE (3<<3) |
| #define AR_WRITABLE (1<<1) |
| #define AR_INTERRUPT (0xe) |
| #define AR_TSS (0x9) |
| |
| #define DPL_KERNEL (PL_KERNEL<<5) |
| #define DPL_USER (PL_USER<<5) |
| |
| #define IO_MAP_BASE (104) |
| |
| #ifndef __ASM__ |
| |
| #include <arch/types.h> |
| #include <typedefs.h> |
| #include <arch/context.h> |
| |
| struct ptr_16_32 { |
| __u16 limit; |
| __u32 base; |
| } __attribute__ ((packed)); |
| |
| struct descriptor { |
| unsigned limit_0_15: 16; |
| unsigned base_0_15: 16; |
| unsigned base_16_23: 8; |
| unsigned access: 8; |
| unsigned limit_16_19: 4; |
| unsigned available: 1; |
| unsigned unused: 1; |
| unsigned special: 1; |
| unsigned granularity : 1; |
| unsigned base_24_31: 8; |
| } __attribute__ ((packed)); |
| |
| struct idescriptor { |
| unsigned offset_0_15: 16; |
| unsigned selector: 16; |
| unsigned unused: 8; |
| unsigned access: 8; |
| unsigned offset_16_31: 16; |
| } __attribute__ ((packed)); |
| |
| |
| struct tss { |
| __u16 link; |
| unsigned : 16; |
| __u32 esp0; |
| __u16 ss0; |
| unsigned : 16; |
| __u32 esp1; |
| __u16 ss1; |
| unsigned : 16; |
| __u32 esp2; |
| __u16 ss2; |
| unsigned : 16; |
| __u32 cr3; |
| __u32 eip; |
| __u32 eflags; |
| __u32 eax; |
| __u32 ecx; |
| __u32 edx; |
| __u32 ebx; |
| __u32 esp; |
| __u32 ebp; |
| __u32 esi; |
| __u32 edi; |
| __u16 es; |
| unsigned : 16; |
| __u16 cs; |
| unsigned : 16; |
| __u16 ss; |
| unsigned : 16; |
| __u16 ds; |
| unsigned : 16; |
| __u16 fs; |
| unsigned : 16; |
| __u16 gs; |
| unsigned : 16; |
| __u16 ldtr; |
| unsigned : 16; |
| unsigned : 16; |
| __u16 io_map_base; |
| } __attribute__ ((packed)); |
| |
| extern struct ptr_16_32 gdtr; |
| extern struct ptr_16_32 real_bootstrap_gdtr; |
| extern struct ptr_16_32 protected_bootstrap_gdtr; |
| extern struct tss *tss_p; |
| |
| extern struct descriptor gdt[]; |
| |
| extern void pm_init(void); |
| |
| extern void gdt_setbase(struct descriptor *d, __address base); |
| extern void gdt_setlimit(struct descriptor *d, __u32 limit); |
| |
| extern void idt_init(void); |
| extern void idt_setoffset(struct idescriptor *d, __address offset); |
| |
| extern void tss_initialize(struct tss *t); |
| |
| #endif /* __ASM__ */ |
| |
| #endif |