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[MIPS] Symmetric Uniprocessor support for Qemu.

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SMP bits needed to builds and run an SMP kernel.  While only a single
processor is supported ATM it's still useful for some SMP debugging using
Qemu.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2006-02-15 15:17:19 +00:00
parent 37caa934af
commit c1449c8fa4
3 changed files with 51 additions and 1 deletions
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2
arch/mips/Kconfig
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@ -1582,7 +1582,7 @@ source "mm/Kconfig"
config SMP
bool "Multi-Processing support"
depends on CPU_RM9000 || ((SIBYTE_BCM1x80 || SIBYTE_BCM1x55 || SIBYTE_SB1250) && !SIBYTE_STANDALONE) || SGI_IP27 || MIPS_MT_SMP
depends on CPU_RM9000 || ((SIBYTE_BCM1x80 || SIBYTE_BCM1x55 || SIBYTE_SB1250 || QEMU) && !SIBYTE_STANDALONE) || SGI_IP27 || MIPS_MT_SMP
---help---
This enables support for systems with more than one CPU. If you have
a system with only one CPU, like most personal computers, say N. If

2
arch/mips/qemu/Makefile
View file

@ -3,3 +3,5 @@
#
obj-y = q-firmware.o q-int.o q-irq.o q-mem.o q-setup.o
obj-$(CONFIG_SMP) += q-smp.o

48
arch/mips/qemu/q-smp.c Normal file
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@ -0,0 +1,48 @@
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2006 by Ralf Baechle (ralf@linux-mips.org)
*
* Symmetric Uniprocessor (TM) Support
*/
#include <linux/kernel.h>
#include <linux/sched.h>
/*
* Send inter-processor interrupt
*/
void core_send_ipi(int cpu, unsigned int action)
{
panic(KERN_ERR "%s called", __FUNCTION__);
}
/*
* After we've done initial boot, this function is called to allow the
* board code to clean up state, if needed
*/
void prom_init_secondary(void)
{
}
void prom_smp_finish(void)
{
}
/* Hook for after all CPUs are online */
void prom_cpus_done(void)
{
}
void __init prom_prepare_cpus(unsigned int max_cpus)
{
cpus_clear(phys_cpu_present_map);
}
/*
* Firmware CPU startup hook
*/
void prom_boot_secondary(int cpu, struct task_struct *idle)
{
}