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More PAGEBLOCKS support

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Jeff Parsons 2015-04-29 09:45:03 -07:00 • committed by jeffpar
commit 453d84c6d8
7 changed files with 252 additions and 48 deletions
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20
modules/pcjs/lib/x86.js
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@ -171,6 +171,25 @@ var X86 = {
},
INVALID: 0 // use X86.DESC.INVALID for invalid DESC values
},
LADDR: { // linear address
PDE: { // index of page directory entry
MASK: 0xffc00000,
SHIFT: 20 // (addr & DIR.MASK) >>> DIR.SHIFT yields a page directory offset (ie, index * 4)
},
PTE: { // index of page table entry
MASK: 0x003ff000,
SHIFT: 10 // (addr & PAGE.MASK) >>> PAGE.SHIFT yields a page table offset (ie, index * 4)
},
OFFSET: 0x00000fff
},
PTE: {
FRAME: 0xfffff000,
DIRTY: 0x00000040, // page has been modified
ACCESSED: 0x00000020, // page has been accessed
USER: 0x00000004, // set for user level (CPL 3), clear for supervisor level (CPL 0-2)
READWRITE: 0x00000002, // set for read/write, clear for read-only (affects CPL 3 only)
PRESENT: 0x00000001 // set for present page, clear for not-present page
},
TSS: {
PREV_TSS: 0x00,
CPL0_SP: 0x02, // start of values altered by task switches
@ -234,6 +253,7 @@ var X86 = {
NP_FAULT: 0x0B, // Not Present Fault (protected-mode only)
SS_FAULT: 0x0C, // Stack Fault (protected-mode only)
GP_FAULT: 0x0D, // General Protection Fault
PG_FAULT: 0x0E, // Page Fault
MF_FAULT: 0x10 // Math Fault (see ESC or WAIT)
},
ERRCODE: {