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Diffstat (limited to 'arch/sh/kernel/cpu/sh4a/smp-shx3.c')
-rw-r--r--arch/sh/kernel/cpu/sh4a/smp-shx3.c67
1 files changed, 25 insertions, 42 deletions
diff --git a/arch/sh/kernel/cpu/sh4a/smp-shx3.c b/arch/sh/kernel/cpu/sh4a/smp-shx3.c
index e5e06845fa4..b8869aa20de 100644
--- a/arch/sh/kernel/cpu/sh4a/smp-shx3.c
+++ b/arch/sh/kernel/cpu/sh4a/smp-shx3.c
@@ -1,7 +1,7 @@
/*
* SH-X3 SMP
*
- * Copyright (C) 2007 Paul Mundt
+ * Copyright (C) 2007 - 2008 Paul Mundt
* Copyright (C) 2007 Magnus Damm
*
* This file is subject to the terms and conditions of the GNU General Public
@@ -14,6 +14,22 @@
#include <linux/interrupt.h>
#include <linux/io.h>
+static irqreturn_t ipi_interrupt_handler(int irq, void *arg)
+{
+ unsigned int message = (unsigned int)(long)arg;
+ unsigned int cpu = hard_smp_processor_id();
+ unsigned int offs = 4 * cpu;
+ unsigned int x;
+
+ x = ctrl_inl(0xfe410070 + offs); /* C0INITICI..CnINTICI */
+ x &= (1 << (message << 2));
+ ctrl_outl(x, 0xfe410080 + offs); /* C0INTICICLR..CnINTICICLR */
+
+ smp_message_recv(message);
+
+ return IRQ_HANDLED;
+}
+
void __init plat_smp_setup(void)
{
unsigned int cpu = 0;
@@ -40,6 +56,13 @@ void __init plat_smp_setup(void)
void __init plat_prepare_cpus(unsigned int max_cpus)
{
+ int i;
+
+ BUILD_BUG_ON(SMP_MSG_NR >= 8);
+
+ for (i = 0; i < SMP_MSG_NR; i++)
+ request_irq(104 + i, ipi_interrupt_handler, IRQF_DISABLED,
+ "IPI", (void *)(long)i);
}
#define STBCR_REG(phys_id) (0xfe400004 | (phys_id << 12))
@@ -59,7 +82,7 @@ void plat_start_cpu(unsigned int cpu, unsigned long entry_point)
ctrl_outl(STBCR_MSTP, STBCR_REG(cpu));
while (!(ctrl_inl(STBCR_REG(cpu)) & STBCR_MSTP))
- ;
+ cpu_relax();
/* Start up secondary processor by sending a reset */
ctrl_outl(STBCR_AP_VAL, STBCR_REG(cpu));
@@ -75,46 +98,6 @@ void plat_send_ipi(unsigned int cpu, unsigned int message)
unsigned long addr = 0xfe410070 + (cpu * 4);
BUG_ON(cpu >= 4);
- BUG_ON(message >= SMP_MSG_NR);
ctrl_outl(1 << (message << 2), addr); /* C0INTICI..CnINTICI */
}
-
-struct ipi_data {
- void (*handler)(void *);
- void *arg;
- unsigned int message;
-};
-
-static irqreturn_t ipi_interrupt_handler(int irq, void *arg)
-{
- struct ipi_data *id = arg;
- unsigned int cpu = hard_smp_processor_id();
- unsigned int offs = 4 * cpu;
- unsigned int x;
-
- x = ctrl_inl(0xfe410070 + offs); /* C0INITICI..CnINTICI */
- x &= (1 << (id->message << 2));
- ctrl_outl(x, 0xfe410080 + offs); /* C0INTICICLR..CnINTICICLR */
-
- id->handler(id->arg);
-
- return IRQ_HANDLED;
-}
-
-static struct ipi_data ipi_handlers[SMP_MSG_NR];
-
-int plat_register_ipi_handler(unsigned int message,
- void (*handler)(void *), void *arg)
-{
- struct ipi_data *id = &ipi_handlers[message];
-
- BUG_ON(SMP_MSG_NR >= 8);
- BUG_ON(message >= SMP_MSG_NR);
-
- id->handler = handler;
- id->arg = arg;
- id->message = message;
-
- return request_irq(104 + message, ipi_interrupt_handler, 0, "IPI", id);
-}