patch-2.3.6 linux/arch/sparc/kernel/entry.S

• Lines: 60
• Date: Wed Jun 9 14:44:25 1999
• Orig file: v2.3.5/linux/arch/sparc/kernel/entry.S
• Orig date: Tue May 11 08:24:31 1999

diff -u --recursive --new-file v2.3.5/linux/arch/sparc/kernel/entry.S linux/arch/sparc/kernel/entry.S
@@ -1,4 +1,4 @@
-/* $Id: entry.S,v 1.159 1999/05/08 03:00:03 davem Exp $
+/* $Id: entry.S,v 1.160 1999/06/03 15:02:11 davem Exp $
  * arch/sparc/kernel/entry.S:  Sparc trap low-level entry points.
  *
  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
@@ -1888,5 +1888,53 @@
 	LOAD_CURRENT(g6, o0)
 	retl
 	 nop
+
+#ifdef CONFIG_PCI
+#include <asm/pcic.h>
+
+	.align	4
+	.globl	linux_trap_ipi15_pcic
+linux_trap_ipi15_pcic:
+	rd	%wim, %l3
+	SAVE_ALL
+
+	/*
+	 * First deactivate NMI
+	 * or we cannot drop ET, cannot get window spill traps.
+	 * The busy loop is necessary because the PIO error
+	 * sometimes does not go away quickly and we trap again.
+	 */
+	sethi	%hi(C_LABEL(pcic_regs)), %o1
+	ld	[%o1 + %lo(C_LABEL(pcic_regs))], %o2
+
+	! Get pending status for printouts later.
+	ld	[%o2 + PCI_SYS_INT_PENDING], %o0
+
+	mov	PCI_SYS_INT_PENDING_CLEAR_ALL, %o1
+	stb	%o1, [%o2 + PCI_SYS_INT_PENDING_CLEAR]
+1:
+	ld	[%o2 + PCI_SYS_INT_PENDING], %o1
+	andcc	%o1, ((PCI_SYS_INT_PENDING_PIO|PCI_SYS_INT_PENDING_PCI)>>24), %g0
+	bne	1b
+	 nop
+
+	or	%l0, PSR_PIL, %l4
+	wr	%l4, 0x0, %psr
+	WRITE_PAUSE
+	wr	%l4, PSR_ET, %psr
+	WRITE_PAUSE
+
+	call	C_LABEL(pcic_nmi)
+	 add	%sp, REGWIN_SZ, %o1	! struct pt_regs *regs
+	RESTORE_ALL
+
+	.globl	C_LABEL(pcic_nmi_trap_patch)
+C_LABEL(pcic_nmi_trap_patch):
+	sethi	%hi(linux_trap_ipi15_pcic), %l3
+	jmpl	%l3 + %lo(linux_trap_ipi15_pcic), %g0
+	 rd	%psr, %l0
+	.word	0
+
+#endif /* CONFIG_PCI */
 
 /* End of entry.S */