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add/use halt() wrapper for issuing "hlt" asm instruction

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git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/branches/UNSTABLE@1158 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Kenneth J Davis 2005-11-26 18:59:53 +00:00
parent f9f2a082c1
commit 3a8752a5ab
2 changed files with 8 additions and 4 deletions
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8
hdr/portab.h
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@ -83,8 +83,9 @@ static char *portab_hRcsId =
void __int__(int); void __int__(int);
#ifndef FORSYS #ifndef FORSYS
void __emit__(char, ...); void __emit__(char, ...);
#define disable() __emit__(0xfa) #define disable() __emit__(0xfa) /* cli; disable interrupts */
#define enable() __emit__(0xfb) #define enable() __emit__(0xfb) /* sti; enable interrupts */
#define halt() __emit__(0xf4) /* hlt; halt until interrupt */
#endif #endif
#elif defined (_MSC_VER) #elif defined (_MSC_VER)
@ -99,6 +100,7 @@ void __emit__(char, ...);
#define __int__(intno) asm int intno; #define __int__(intno) asm int intno;
#define disable() asm cli #define disable() asm cli
#define enable() asm sti #define enable() asm sti
#define halt() asm hlt
#define _CS getCS() #define _CS getCS()
static unsigned short __inline getCS(void) static unsigned short __inline getCS(void)
{ {
@ -118,6 +120,8 @@ void disable(void);
#pragma aux disable = "cli" modify exact []; #pragma aux disable = "cli" modify exact [];
void enable(void); void enable(void);
#pragma aux enable = "sti" modify exact []; #pragma aux enable = "sti" modify exact [];
void halt(void);
#pragma aux halt = "hlt" modify exact [];
#define asm __asm #define asm __asm
#define far __far #define far __far
#define CDECL __cdecl #define CDECL __cdecl

4
kernel/inthndlr.c
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@ -1929,8 +1929,8 @@ VOID ASMCFUNC int2F_12_handler(struct int2f12regs r)
case 0x80: /* Win Release Time-slice */ case 0x80: /* Win Release Time-slice */
{ {
/* This function is generally only called in idle loops */ /* This function is generally only called in idle loops */
__emit__(0xfb); /* sti; enable interrupts */ enable(); /* sti; enable interrupts */
__emit__(0xf4); /* hlt; halt until interrupt */ halt(); /* hlt; halt until interrupt */
r.AX = 0; r.AX = 0;
/* DebugPrintf(("Release Time Slice\n")); */ /* DebugPrintf(("Release Time Slice\n")); */
break; break;