linux-kernel - [PATCH 12/14] MIPS: SGI-IP27: Only reserve interrupts used in Linux

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Date:   Thu,  9 Jan 2020 13:33:49 +0100
From:   Thomas Bogendoerfer <tbogendoerfer@...e.de>
To:     Paul Burton <paulburton@...nel.org>
Cc:     Ralf Baechle <ralf@...ux-mips.org>,
        James Hogan <jhogan@...nel.org>, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 12/14] MIPS: SGI-IP27: Only reserve interrupts used in Linux

Reduce number of reserved interrupts by removing bits copied from IRIX
and not used by Linux.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@...e.de>
---
 arch/mips/include/asm/sn/intr.h | 17 -----------------
 arch/mips/sgi-ip27/ip27-irq.c   |  4 +---
 2 files changed, 1 insertion(+), 20 deletions(-)

diff --git a/arch/mips/include/asm/sn/intr.h b/arch/mips/include/asm/sn/intr.h
index fc1348193957..3d6954d370dc 100644
--- a/arch/mips/include/asm/sn/intr.h
+++ b/arch/mips/include/asm/sn/intr.h
@@ -8,15 +8,6 @@
 #ifndef __ASM_SN_INTR_H
 #define __ASM_SN_INTR_H
 
-/* Number of interrupt levels associated with each interrupt register. */
-#define N_INTPEND_BITS		64
-
-#define INT_PEND0_BASELVL	0
-#define INT_PEND1_BASELVL	64
-
-#define N_INTPENDJUNK_BITS	8
-#define INTPENDJUNK_CLRBIT	0x80
-
 /*
  * Macros to manipulate the interrupt register on the calling hub chip.
  */
@@ -84,14 +75,6 @@ do {								\
 #define CPU_RESCHED_B_IRQ	 8
 #define CPU_CALL_A_IRQ		 9
 #define CPU_CALL_B_IRQ		10
-#define MSC_MESG_INTR		11
-#define BASE_PCI_IRQ		12
-
-/*
- * INT_PEND0 again, bits determined by hardware / hardcoded:
- */
-#define SDISK_INTR		63	/* SABLE name */
-#define IP_PEND0_6_63		63	/* What is this bit? */
 
 /*
  * INT_PEND1 hard-coded bits:
diff --git a/arch/mips/sgi-ip27/ip27-irq.c b/arch/mips/sgi-ip27/ip27-irq.c
index 5a4a782ceae5..42df9fafa943 100644
--- a/arch/mips/sgi-ip27/ip27-irq.c
+++ b/arch/mips/sgi-ip27/ip27-irq.c
@@ -287,11 +287,9 @@ void __init arch_init_irq(void)
 	 * Mark these as reserved right away so they won't be used accidentally
 	 * later.
 	 */
-	for (i = 0; i <= BASE_PCI_IRQ; i++)
+	for (i = 0; i <= CPU_CALL_B_IRQ; i++)
 		set_bit(i, hub_irq_map);
 
-	set_bit(IP_PEND0_6_63, hub_irq_map);
-
 	for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++)
 		set_bit(i, hub_irq_map);
 
-- 
2.24.1