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Cleaned up DMA port handling and minor tweaks

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This commit is contained in:
Jeff Parsons 2015-04-13 14:02:02 -07:00 • committed by jeffpar
commit 158cc65da3
16 changed files with 453 additions and 175 deletions
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28
modules/pcjs/lib/x86seg.js
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@ -243,12 +243,12 @@ X86Seg.prototype.loadIDTProt = function loadIDTProt(nIDT)
/**
* checkReadReal(off, cb, fSuppress)
*
* TODO: Invoke X86.fnFault.call(this.cpu, X86.EXCEPTION.GP_FAULT) if off is 0xffff and cb is 1;
* TODO: Invoke X86.fnFault.call(this.cpu, X86.EXCEPTION.GP_FAULT) if off is 0xffff and cb > 1;
* also, whether or not the fnFault() call should include an error code, since this is happening in real-mode.
*
* @this {X86Seg}
* @param {number} off is a segment-relative offset
* @param {number} cb is number of extra bytes to check (0 or 1)
* @param {number} cb is number of bytes to check (1, 2 or 4)
* @param {boolean} [fSuppress] is true to suppress any errors
* @return {number} corresponding physical address if valid, or ADDR_INVALID if error (TODO: No error conditions exist yet)
*/
@ -260,12 +260,12 @@ X86Seg.prototype.checkReadReal = function checkReadReal(off, cb, fSuppress)
/**
* checkWriteReal(off, cb, fSuppress)
*
* TODO: Invoke X86.fnFault.call(this.cpu, X86.EXCEPTION.GP_FAULT) if off is 0xffff and cb is 1;
* TODO: Invoke X86.fnFault.call(this.cpu, X86.EXCEPTION.GP_FAULT) if off is 0xffff and cb > 1;
* also, whether or not the fnFault() call should include an error code, since this is happening in real-mode.
*
* @this {X86Seg}
* @param {number} off is a segment-relative offset
* @param {number} cb is number of extra bytes to check (0 or 1)
* @param {number} cb is number of bytes to check (1, 2 or 4)
* @param {boolean} [fSuppress] is true to suppress any errors
* @return {number} corresponding physical address if valid, or ADDR_INVALID if error (TODO: No error conditions exist yet)
*/
@ -279,13 +279,13 @@ X86Seg.prototype.checkWriteReal = function checkWriteReal(off, cb, fSuppress)
*
* @this {X86Seg}
* @param {number} off is a segment-relative offset
* @param {number} cb is number of extra bytes to check (0 or 1)
* @param {number} cb is number of bytes to check (1, 2 or 4)
* @param {boolean} [fSuppress] is true to suppress any errors
* @return {number} corresponding physical address if valid, or ADDR_INVALID if not
*/
X86Seg.prototype.checkReadProt = function checkReadProt(off, cb, fSuppress)
{
if (off + cb <= this.limit) {
if (off + cb - 1 <= this.limit) {
return (this.base + off)|0;
}
return this.checkReadProtDisallowed(off, cb, fSuppress);
@ -296,13 +296,13 @@ X86Seg.prototype.checkReadProt = function checkReadProt(off, cb, fSuppress)
*
* @this {X86Seg}
* @param {number} off is a segment-relative offset
* @param {number} cb is number of extra bytes to check (0 or 1)
* @param {number} cb is number of bytes to check (1, 2 or 4)
* @param {boolean} [fSuppress] is true to suppress any errors
* @return {number} corresponding physical address if valid, ADDR_INVALID if not
*/
X86Seg.prototype.checkReadProtDown = function checkReadProtDown(off, cb, fSuppress)
{
if (off + cb > this.limit) {
if (off + cb - 1 > this.limit) {
return (this.base + off)|0;
}
return this.checkReadProtDisallowed(off, cb, fSuppress);
@ -313,7 +313,7 @@ X86Seg.prototype.checkReadProtDown = function checkReadProtDown(off, cb, fSuppre
*
* @this {X86Seg}
* @param {number} off is a segment-relative offset
* @param {number} cb is number of extra bytes to check (0 or 1)
* @param {number} cb is number of bytes to check (1, 2 or 4)
* @param {boolean} [fSuppress] is true to suppress any errors
* @return {number} corresponding physical address if valid, ADDR_INVALID if not
*/
@ -330,13 +330,13 @@ X86Seg.prototype.checkReadProtDisallowed = function checkReadProtDisallowed(off,
*
* @this {X86Seg}
* @param {number} off is a segment-relative offset
* @param {number} cb is number of extra bytes to check (0 or 1)
* @param {number} cb is number of bytes to check (1, 2 or 4)
* @param {boolean} [fSuppress] is true to suppress any errors
* @return {number} corresponding physical address if valid, ADDR_INVALID if not
*/
X86Seg.prototype.checkWriteProt = function checkWriteProt(off, cb, fSuppress)
{
if (off + cb <= this.limit) {
if (off + cb - 1 <= this.limit) {
return (this.base + off)|0;
}
return this.checkWriteProtDisallowed(off, cb, fSuppress);
@ -347,13 +347,13 @@ X86Seg.prototype.checkWriteProt = function checkWriteProt(off, cb, fSuppress)
*
* @this {X86Seg}
* @param {number} off is a segment-relative offset
* @param {number} cb is number of extra bytes to check (0 or 1)
* @param {number} cb is number of bytes to check (1, 2 or 4)
* @param {boolean} [fSuppress] is true to suppress any errors
* @return {number} corresponding physical address if valid, ADDR_INVALID if not
*/
X86Seg.prototype.checkWriteProtDown = function checkWriteProtDown(off, cb, fSuppress)
{
if (off + cb > this.limit) {
if (off + cb - 1 > this.limit) {
return (this.base + off)|0;
}
return this.checkWriteProtDisallowed(off, cb, fSuppress);
@ -364,7 +364,7 @@ X86Seg.prototype.checkWriteProtDown = function checkWriteProtDown(off, cb, fSupp
*
* @this {X86Seg}
* @param {number} off is a segment-relative offset
* @param {number} cb is number of extra bytes to check (0 or 1)
* @param {number} cb is number of bytes to check (1, 2 or 4)
* @param {boolean} [fSuppress] is true to suppress any errors
* @return {number} corresponding physical address if valid, ADDR_INVALID if not
*/