patch-2.3.51 linux/arch/sparc/lib/irqlock.S

• Lines: 123
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.50/linux/arch/sparc/lib/irqlock.S
• Orig date: Thu Apr 22 19:24:51 1999

diff -u --recursive --new-file v2.3.50/linux/arch/sparc/lib/irqlock.S linux/arch/sparc/lib/irqlock.S
@@ -1,122 +0,0 @@
-/* $Id: irqlock.S,v 1.5 1999/04/20 13:22:37 anton Exp $
- * irqlock.S: High performance IRQ global locking and interrupt entry.
- *
- * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
- */
-
-#include <asm/psr.h>
-#include <asm/smp.h>
-
-	.text
-	.align	4
-
-	/* Weird calling conventions... %g7=flags, %g4=%prev_o7
-	 * Very clever for the __global_sti case, the inline which
-	 * gets us here clears %g7 and it just works.
-	 */
-	.globl	___global_restore_flags, ___global_sti, ___global_cli
-___global_restore_flags:
-	bne,a	___global_cli
-	 rd	%tbr, %g7
-	rd	%tbr, %g2
-
-___global_sti:
-	sethi	%hi(global_irq_holder), %g1
-	sethi	%hi(global_irq_lock), %g3
-	srl	%g2, 12, %g2
-	ldub	[%g1 + %lo(global_irq_holder)], %g5
-	and	%g2, 3, %g2
-	cmp	%g5, %g2
-	bne	1f
-	 mov	NO_PROC_ID, %g5
-	stb	%g5, [%g1 + %lo(global_irq_holder)]
-	stb	%g0, [%g3 + %lo(global_irq_lock)]
-1:
-	rd	%psr, %g3
-	andcc	%g7, 2, %g0
-	bne,a	1f
-	 or	%g3, PSR_PIL, %g3
-	andn	%g3, PSR_PIL, %g3
-1:
-	wr	%g3, 0x0, %psr
-	nop
-__global_cli_out:			! All togther now... "fuuunnnnn"
-	retl
-	 mov	%g4, %o7
-
-__spin_on_global_irq_lock:
-	orcc	%g2, 0x0, %g0
-	bne,a	__spin_on_global_irq_lock
-	 ldub	[%g1], %g2
-	b,a	1f
-
-	/* This is a royal pain in the ass to make fast... 8-( */
-___global_cli:
-	sethi	%hi(global_irq_lock), %g5
-	srl	%g7, 12, %g7
-	sethi	%hi(global_irq_holder), %g3
-	and	%g7, 3, %g7
-	ldub	[%g3 + %lo(global_irq_holder)], %g1
-	rd	%psr, %g2
-	cmp	%g1, %g7
-	or	%g2, PSR_PIL, %g2
-	be	__global_cli_out
-	 wr	%g2, 0x0, %psr			! XXX some sparcs may choke on this...
-	sethi	%hi(local_irq_count), %g3
-	or	%g3, %lo(local_irq_count), %g3
-	or	%g5, %lo(global_irq_lock), %g1
-1:
-	ldstub	[%g1], %g2
-	orcc	%g2, 0x0, %g0
-	bne,a	__spin_on_global_irq_lock
-	 ldub	[%g1], %g2
-__wait_on_irq:
-	sll	%g7, 2, %g7
-	ld	[%g3 + %g7], %g2
-	sethi	%hi(global_irq_count), %g1
-	or	%g1, %lo(global_irq_count), %g1
-	srl	%g7, 2, %g7
-	ld	[%g1], %g5
-	sra	%g5, 8, %g5
-__wait_on_irq_loop:
-	cmp	%g5, %g2
-	sethi	%hi(global_irq_holder), %g3
-	be,a	__global_cli_out	! Mamamia, Mamamia, this is the fast path
-	 stb	%g7, [%g3 + %lo(global_irq_holder)]
-1:
-	ldstub	[%g1 + 3], %g3
-	orcc	%g3, 0x0, %g0
-	bne	1b
-	 ld	[%g1], %g3
-	sra	%g3, 8, %g3
-	sub	%g3, %g2, %g3
-	sll	%g3, 8, %g3
-	st	%g3, [%g1]
-	sethi	%hi(global_irq_lock), %g3
-	stb	%g0, [%g3 + %lo(global_irq_lock)]
-0:
-	ld	[%g1], %g5
-9:
-	ldub	[%g3 + %lo(global_irq_lock)], %g3
-	sra	%g5, 8, %g5
-	orcc	%g3, %g5, %g0
-	bne	0b
-	 sethi	%hi(global_irq_lock), %g3
-	ldstub	[%g3 + %lo(global_irq_lock)], %g5
-	orcc	%g5, 0x0, %g0
-	bne,a	9b
-	 ld	[%g1], %g5
-1:
-	ldstub	[%g1 + 3], %g3
-	orcc	%g3, 0x0, %g0
-	bne	1b
-	 ld	[%g1], %g3
-	sra	%g3, 8, %g3
-	add	%g3, %g2, %g5
-	sll	%g5, 8, %g3
-	b	__wait_on_irq_loop
-	 st	%g3, [%g1]
-
-#if 0 /* XXX I'm not delirious enough to debug this yet. */
-	 add	%o7, (8 + (__wait_on_irq_loop - . - 4)), %o7	! AIEEEEE
-#endif