Commit c7936b9a authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: smp: Hook in to the generic IPI handler for SH-X3 SMP.


Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 173a44dd
......@@ -32,8 +32,6 @@ void plat_prepare_cpus(unsigned int max_cpus);
int plat_smp_processor_id(void);
void plat_start_cpu(unsigned int cpu, unsigned long entry_point);
void plat_send_ipi(unsigned int cpu, unsigned int message);
int plat_register_ipi_handler(unsigned int message,
void (*handler)(void *), void *arg);
extern void arch_send_call_function_single_ipi(int cpu);
extern void arch_send_call_function_ipi(cpumask_t mask);
......
/*
* 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))
......@@ -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);
}
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