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authorRalf Baechle <ralf@linux-mips.org>2006-02-15 10:17:19 -0500
committerRalf Baechle <ralf@linux-mips.org>2006-03-21 08:27:45 -0500
commitc1449c8fa40859eb269025a7db85b34115205f5b (patch)
treef92bf4d9544aec45b978ed8e3f638018054b3a5c /arch
parent37caa934af02bc01d0e1366a49e1c89360fa0f29 (diff)
[MIPS] Symmetric Uniprocessor support for Qemu.
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/Kconfig2
-rw-r--r--arch/mips/qemu/Makefile2
-rw-r--r--arch/mips/qemu/q-smp.c48
3 files changed, 51 insertions, 1 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 9d1e78f9c060..6356f7d52ce6 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1582,7 +1582,7 @@ source "mm/Kconfig"
1582 1582
1583config SMP 1583config SMP
1584 bool "Multi-Processing support" 1584 bool "Multi-Processing support"
1585 depends on CPU_RM9000 || ((SIBYTE_BCM1x80 || SIBYTE_BCM1x55 || SIBYTE_SB1250) && !SIBYTE_STANDALONE) || SGI_IP27 || MIPS_MT_SMP 1585 depends on CPU_RM9000 || ((SIBYTE_BCM1x80 || SIBYTE_BCM1x55 || SIBYTE_SB1250 || QEMU) && !SIBYTE_STANDALONE) || SGI_IP27 || MIPS_MT_SMP
1586 ---help--- 1586 ---help---
1587 This enables support for systems with more than one CPU. If you have 1587 This enables support for systems with more than one CPU. If you have
1588 a system with only one CPU, like most personal computers, say N. If 1588 a system with only one CPU, like most personal computers, say N. If
diff --git a/arch/mips/qemu/Makefile b/arch/mips/qemu/Makefile
index 934944ab9e85..6a8e8bcef552 100644
--- a/arch/mips/qemu/Makefile
+++ b/arch/mips/qemu/Makefile
@@ -3,3 +3,5 @@
3# 3#
4 4
5obj-y = q-firmware.o q-int.o q-irq.o q-mem.o q-setup.o 5obj-y = q-firmware.o q-int.o q-irq.o q-mem.o q-setup.o
6
7obj-$(CONFIG_SMP) += q-smp.o
diff --git a/arch/mips/qemu/q-smp.c b/arch/mips/qemu/q-smp.c
new file mode 100644
index 000000000000..5a12354cd576
--- /dev/null
+++ b/arch/mips/qemu/q-smp.c
@@ -0,0 +1,48 @@
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2006 by Ralf Baechle (ralf@linux-mips.org)
7 *
8 * Symmetric Uniprocessor (TM) Support
9 */
10#include <linux/kernel.h>
11#include <linux/sched.h>
12
13/*
14 * Send inter-processor interrupt
15 */
16void core_send_ipi(int cpu, unsigned int action)
17{
18 panic(KERN_ERR "%s called", __FUNCTION__);
19}
20
21/*
22 * After we've done initial boot, this function is called to allow the
23 * board code to clean up state, if needed
24 */
25void prom_init_secondary(void)
26{
27}
28
29void prom_smp_finish(void)
30{
31}
32
33/* Hook for after all CPUs are online */
34void prom_cpus_done(void)
35{
36}
37
38void __init prom_prepare_cpus(unsigned int max_cpus)
39{
40 cpus_clear(phys_cpu_present_map);
41}
42
43/*
44 * Firmware CPU startup hook
45 */
46void prom_boot_secondary(int cpu, struct task_struct *idle)
47{
48}