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Fix for int15 handlers. 

The int 1587 was long jumping to wrong segment.
Minor cleanup - breakout handlers better.
This commit is contained in:
Kevin O'Connor 2008-03-01 13:38:38 -05:00
parent c09492e78a
commit adb6b37163
1 changed files with 26 additions and 23 deletions
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49
src/system.c
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@ -59,6 +59,18 @@ handle_1524XX(struct bregs *regs)
handle_ret(regs, RET_EUNSUPPORTED);
}
static void
handle_1524(struct bregs *regs)
{
switch (regs->al) {
case 0x00: handle_152400(regs); break;
case 0x01: handle_152401(regs); break;
case 0x02: handle_152402(regs); break;
case 0x03: handle_152403(regs); break;
default: handle_1524XX(regs); break;
}
}
// removable media eject
static void
handle_1552(struct bregs *regs)
@ -101,9 +113,6 @@ handle_1587(struct bregs *regs)
// +++ should probably have descriptor checks
// +++ should have exception handlers
// turn off interrupts
unsigned long flags = irq_save();
u8 prev_a20_enable = set_a20(1); // enable A20 line
// 128K max of transfer on 386+ ???
@ -171,7 +180,7 @@ handle_1587(struct bregs *regs)
"movl %%eax, %%cr0\n"
// far jump to flush CPU queue after transition to protected mode
"ljmpw $0xf000, $1f\n"
"ljmpw $0x0020, $1f\n"
"1:\n"
// GDT points to valid descriptor table, now load DS, ES
@ -205,8 +214,6 @@ handle_1587(struct bregs *regs)
set_a20(prev_a20_enable);
irq_restore(flags);
handle_ret(regs, 0);
}
@ -390,6 +397,16 @@ handle_15e8XX(struct bregs *regs)
handle_ret(regs, RET_EUNSUPPORTED);
}
static void
handle_15e8(struct bregs *regs)
{
switch (regs->al) {
case 0x01: handle_15e801(regs); break;
case 0x20: handle_15e820(regs); break;
default: handle_15e8XX(regs); break;
}
}
static void
handle_15XX(struct bregs *regs)
{
@ -400,17 +417,9 @@ handle_15XX(struct bregs *regs)
void VISIBLE
handle_15(struct bregs *regs)
{
debug_enter(regs);
//debug_enter(regs);
switch (regs->ah) {
case 0x24:
switch (regs->al) {
case 0x00: handle_152400(regs); break;
case 0x01: handle_152401(regs); break;
case 0x02: handle_152402(regs); break;
case 0x03: handle_152403(regs); break;
default: handle_1524XX(regs); break;
}
break;
case 0x24: handle_1524(regs); break;
case 0x4f: handle_154f(regs); break;
case 0x52: handle_1552(regs); break;
case 0x53: handle_1553(regs); break;
@ -423,13 +432,7 @@ handle_15(struct bregs *regs)
case 0xc0: handle_15c0(regs); break;
case 0xc1: handle_15c1(regs); break;
case 0xc2: handle_15c2(regs); break;
case 0xe8:
switch (regs->al) {
case 0x01: handle_15e801(regs); break;
case 0x20: handle_15e820(regs); break;
default: handle_15e8XX(regs); break;
}
break;
case 0xe8: handle_15e8(regs); break;
default: handle_15XX(regs); break;
}
debug_exit(regs);