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Page breaking of mmu.h

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This commit is contained in:
Austin Clements 2010-08-31 16:54:50 -04:00
parent b5592b4d2f
commit 7914ab7214
1 changed files with 14 additions and 17 deletions
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31
mmu.h
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@ -24,6 +24,20 @@
#define FL_VIP 0x00100000 // Virtual Interrupt Pending #define FL_VIP 0x00100000 // Virtual Interrupt Pending
#define FL_ID 0x00200000 // ID flag #define FL_ID 0x00200000 // ID flag
// Control Register flags
#define CR0_PE 0x00000001 // Protection Enable
#define CR0_MP 0x00000002 // Monitor coProcessor
#define CR0_EM 0x00000004 // Emulation
#define CR0_TS 0x00000008 // Task Switched
#define CR0_ET 0x00000010 // Extension Type
#define CR0_NE 0x00000020 // Numeric Errror
#define CR0_WP 0x00010000 // Write Protect
#define CR0_AM 0x00040000 // Alignment Mask
#define CR0_NW 0x20000000 // Not Writethrough
#define CR0_CD 0x40000000 // Cache Disable
#define CR0_PG 0x80000000 // Paging
//PAGEBREAK!
// Segment Descriptor // Segment Descriptor
struct segdesc { struct segdesc {
uint lim_15_0 : 16; // Low bits of segment limit uint lim_15_0 : 16; // Low bits of segment limit
@ -46,7 +60,6 @@ struct segdesc {
{ ((lim) >> 12) & 0xffff, (uint)(base) & 0xffff, \ { ((lim) >> 12) & 0xffff, (uint)(base) & 0xffff, \
((uint)(base) >> 16) & 0xff, type, 1, dpl, 1, \ ((uint)(base) >> 16) & 0xff, type, 1, dpl, 1, \
(uint)(lim) >> 28, 0, 0, 1, 1, (uint)(base) >> 24 } (uint)(lim) >> 28, 0, 0, 1, 1, (uint)(base) >> 24 }
#define SEG16(type, base, lim, dpl) (struct segdesc) \ #define SEG16(type, base, lim, dpl) (struct segdesc) \
{ (lim) & 0xffff, (uint)(base) & 0xffff, \ { (lim) & 0xffff, (uint)(base) & 0xffff, \
((uint)(base) >> 16) & 0xff, type, 1, dpl, 1, \ ((uint)(base) >> 16) & 0xff, type, 1, dpl, 1, \
@ -76,7 +89,6 @@ struct segdesc {
#define STS_IG32 0xE // 32-bit Interrupt Gate #define STS_IG32 0xE // 32-bit Interrupt Gate
#define STS_TG32 0xF // 32-bit Trap Gate #define STS_TG32 0xF // 32-bit Trap Gate
//PAGEBREAK!
// A linear address 'la' has a three-part structure as follows: // A linear address 'la' has a three-part structure as follows:
// //
// +--------10------+-------10-------+---------12----------+ // +--------10------+-------10-------+---------12----------+
@ -128,21 +140,6 @@ struct segdesc {
typedef uint pte_t; typedef uint pte_t;
// Control Register flags
#define CR0_PE 0x00000001 // Protection Enable
#define CR0_MP 0x00000002 // Monitor coProcessor
#define CR0_EM 0x00000004 // Emulation
#define CR0_TS 0x00000008 // Task Switched
#define CR0_ET 0x00000010 // Extension Type
#define CR0_NE 0x00000020 // Numeric Errror
#define CR0_WP 0x00010000 // Write Protect
#define CR0_AM 0x00040000 // Alignment Mask
#define CR0_NW 0x20000000 // Not Writethrough
#define CR0_CD 0x40000000 // Cache Disable
#define CR0_PG 0x80000000 // Paging
// PAGEBREAK: 40
// Task state segment format // Task state segment format
struct taskstate { struct taskstate {
uint link; // Old ts selector uint link; // Old ts selector