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authorjhb <jhb@FreeBSD.org>2003-11-03 22:08:52 +0000
committerjhb <jhb@FreeBSD.org>2003-11-03 22:08:52 +0000
commita7c1f412b0f93cd7d24d8bff31477708b7c0a49f (patch)
tree792d5d598afcdcb88255d16b4c3542d6ba67209a /sys/i386/isa
parent88594488f50febe536eee531611de73201171753 (diff)
downloadFreeBSD-src-a7c1f412b0f93cd7d24d8bff31477708b7c0a49f.zip
FreeBSD-src-a7c1f412b0f93cd7d24d8bff31477708b7c0a49f.tar.gz
- Export doreti as a global symbol.
- Don't include isa/vector.s. Each PIC driver's entry points now live in their own standalone files.
Diffstat (limited to 'sys/i386/isa')
-rw-r--r--sys/i386/isa/vector.s108
1 files changed, 0 insertions, 108 deletions
diff --git a/sys/i386/isa/vector.s b/sys/i386/isa/vector.s
deleted file mode 100644
index 0bed76f..0000000
--- a/sys/i386/isa/vector.s
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- * from: vector.s, 386BSD 0.1 unknown origin
- * $FreeBSD$
- */
-
-/*
- * modified for PC98 by Kakefuda
- */
-
-#include "opt_auto_eoi.h"
-
-#include <i386/isa/icu.h>
-#ifdef PC98
-#include <pc98/pc98/pc98.h>
-#else
-#include <i386/isa/isa.h>
-#endif
-#include <i386/isa/intr_machdep.h>
-
-#define FAST_INTR_HANDLER_USES_ES 1
-#ifdef FAST_INTR_HANDLER_USES_ES
-#define ACTUALLY_PUSHED 1
-#define MAYBE_MOVW_AX_ES movw %ax,%es
-#define MAYBE_POPL_ES popl %es
-#define MAYBE_PUSHL_ES pushl %es
-#else
-/*
- * We can usually skip loading %es for fastintr handlers. %es should
- * only be used for string instructions, and fastintr handlers shouldn't
- * do anything slow enough to justify using a string instruction.
- */
-#define ACTUALLY_PUSHED 0
-#define MAYBE_MOVW_AX_ES
-#define MAYBE_POPL_ES
-#define MAYBE_PUSHL_ES
-#endif
-
- .data
- ALIGN_DATA
-
-/*
- * Interrupt counters and names for export to vmstat(8) and friends.
- *
- * XXX this doesn't really belong here; everything except the labels
- * for the endpointers is almost machine-independent.
- */
-
- .globl intrcnt, eintrcnt
-intrcnt:
- .space INTRCNT_COUNT * 4
-eintrcnt:
-
- .globl intrnames, eintrnames
-intrnames:
- .space INTRCNT_COUNT * 16
-eintrnames:
- .text
-
-/*
- * Macros for interrupt interrupt entry, call to handler, and exit.
- *
- * XXX - the interrupt frame is set up to look like a trap frame. This is
- * usually a waste of time. The only interrupt handlers that want a frame
- * are the clock handler (it wants a clock frame), the npx handler (it's
- * easier to do right all in assembler). The interrupt return routine
- * needs a trap frame for rare AST's (it could easily convert the frame).
- * The direct costs of setting up a trap frame are two pushl's (error
- * code and trap number), an addl to get rid of these, and pushing and
- * popping the call-saved regs %esi, %edi and %ebp twice, The indirect
- * costs are making the driver interface nonuniform so unpending of
- * interrupts is more complicated and slower (call_driver(unit) would
- * be easier than ensuring an interrupt frame for all handlers. Finally,
- * there are some struct copies in the npx handler and maybe in the clock
- * handler that could be avoided by working more with pointers to frames
- * instead of frames.
- *
- * XXX - should we do a cld on every system entry to avoid the requirement
- * for scattered cld's?
- *
- * Coding notes for *.s:
- *
- * If possible, avoid operations that involve an operand size override.
- * Word-sized operations might be smaller, but the operand size override
- * makes them slower on on 486's and no faster on 386's unless perhaps
- * the instruction pipeline is depleted. E.g.,
- *
- * Use movl to seg regs instead of the equivalent but more descriptive
- * movw - gas generates an irelevant (slower) operand size override.
- *
- * Use movl to ordinary regs in preference to movw and especially
- * in preference to movz[bw]l. Use unsigned (long) variables with the
- * top bits clear instead of unsigned short variables to provide more
- * opportunities for movl.
- *
- * If possible, use byte-sized operations. They are smaller and no slower.
- *
- * Use (%reg) instead of 0(%reg) - gas generates larger code for the latter.
- *
- * If the interrupt frame is made more flexible, INTR can push %eax first
- * and decide the ipending case with less overhead, e.g., by avoiding
- * loading segregs.
- */
-
-#ifdef APIC_IO
-#include "i386/isa/apic_vector.s"
-#else
-#include "i386/isa/icu_vector.s"
-#endif /* APIC_IO */
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