linux-kernel - [PATCH 4/18] ARM: OMAP: Optimize INTC register accesses and enable autoidling

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <11761542731458-git-send-email-tony@atomide.com>
Date:	Mon,  9 Apr 2007 17:30:47 -0400
From:	Tony Lindgren <tony@...mide.com>
To:	linux-kernel@...r.kernel.org
Cc:	Juha Yrjola <juha.yrjola@...idboot.com>,
	Tony Lindgren <tony@...mide.com>
Subject: [PATCH 4/18] ARM: OMAP: Optimize INTC register accesses and enable autoidling

From: Juha Yrjola <juha.yrjola@...idboot.com>

Use virtual addresses directly instead of physical addresses to
avoid having to recalculate the virtual address with every
register access.

Signed-off-by: Juha Yrjola <juha.yrjola@...idboot.com>
Signed-off-by: Tony Lindgren <tony@...mide.com>
---
 arch/arm/mach-omap2/irq.c |   19 +++++++++++--------
 1 files changed, 11 insertions(+), 8 deletions(-)

--- a/arch/arm/mach-omap2/irq.c
+++ b/arch/arm/mach-omap2/irq.c
@@ -37,7 +37,7 @@ static struct omap_irq_bank {
 } __attribute__ ((aligned(4))) irq_banks[] = {
 	{
 		/* MPU INTC */
-		.base_reg	= OMAP24XX_IC_BASE,
+		.base_reg	= IO_ADDRESS(OMAP24XX_IC_BASE),
 		.nr_irqs	= 96,
 	}, {
 		/* XXX: DSP INTC */
@@ -47,7 +47,7 @@ static struct omap_irq_bank {
 /* XXX: FIQ and additional INTC support (only MPU at the moment) */
 static void omap_ack_irq(unsigned int irq)
 {
-	omap_writel(0x1, irq_banks[0].base_reg + INTC_CONTROL);
+	__raw_writel(0x1, irq_banks[0].base_reg + INTC_CONTROL);
 }
 
 static void omap_mask_irq(unsigned int irq)
@@ -60,7 +60,7 @@ static void omap_mask_irq(unsigned int irq)
 		irq %= 32;
 	}
 
-	omap_writel(1 << irq, irq_banks[0].base_reg + INTC_MIR_SET0 + offset);
+	__raw_writel(1 << irq, irq_banks[0].base_reg + INTC_MIR_SET0 + offset);
 }
 
 static void omap_unmask_irq(unsigned int irq)
@@ -73,7 +73,7 @@ static void omap_unmask_irq(unsigned int irq)
 		irq %= 32;
 	}
 
-	omap_writel(1 << irq, irq_banks[0].base_reg + INTC_MIR_CLEAR0 + offset);
+	__raw_writel(1 << irq, irq_banks[0].base_reg + INTC_MIR_CLEAR0 + offset);
 }
 
 static void omap_mask_ack_irq(unsigned int irq)
@@ -93,17 +93,20 @@ static void __init omap_irq_bank_init_one(struct omap_irq_bank *bank)
 {
 	unsigned long tmp;
 
-	tmp = omap_readl(bank->base_reg + INTC_REVISION) & 0xff;
+	tmp = __raw_readl(bank->base_reg + INTC_REVISION) & 0xff;
 	printk(KERN_INFO "IRQ: Found an INTC at 0x%08lx "
 			 "(revision %ld.%ld) with %d interrupts\n",
 			 bank->base_reg, tmp >> 4, tmp & 0xf, bank->nr_irqs);
 
-	tmp = omap_readl(bank->base_reg + INTC_SYSCONFIG);
+	tmp = __raw_readl(bank->base_reg + INTC_SYSCONFIG);
 	tmp |= 1 << 1;	/* soft reset */
-	omap_writel(tmp, bank->base_reg + INTC_SYSCONFIG);
+	__raw_writel(tmp, bank->base_reg + INTC_SYSCONFIG);
 
-	while (!(omap_readl(bank->base_reg + INTC_SYSSTATUS) & 0x1))
+	while (!(__raw_readl(bank->base_reg + INTC_SYSSTATUS) & 0x1))
 		/* Wait for reset to complete */;
+
+	/* Enable autoidle */
+	__raw_writel(1 << 0, bank->base_reg + INTC_SYSCONFIG);
 }
 
 void __init omap_init_irq(void)
-- 
1.4.4.2

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/