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author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-02 04:08:03 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-02 04:08:03 (GMT) |
commit | 994c0e992522c123298b4a91b72f5e67ba2d1123 (patch) | |
tree | 411952f844b8e1d5ef2854e44df793529078d3eb /arch/arm/mach-highbank/platsmp.c | |
parent | 367069f16e32e188d4687fe2c3e30f2ca583836f (diff) | |
parent | abc3f126ac736280c68db6472eb0040ddf6e1b1f (diff) | |
download | linux-fsl-qoriq-994c0e992522c123298b4a91b72f5e67ba2d1123.tar.xz |
Merge branch 'next/soc' of git://git.linaro.org/people/arnd/arm-soc
* 'next/soc' of git://git.linaro.org/people/arnd/arm-soc: (21 commits)
MAINTAINERS: add ARM/FREESCALE IMX6 entry
arm/imx: merge i.MX3 and i.MX6
arm/imx6q: add suspend/resume support
arm/imx6q: add device tree machine support
arm/imx6q: add smp and cpu hotplug support
arm/imx6q: add core drivers clock, gpc, mmdc and src
arm/imx: add gic_handle_irq function
arm/imx6q: add core definitions and low-level debug uart
arm/imx6q: add device tree source
ARM: highbank: add suspend support
ARM: highbank: Add cpu hotplug support
ARM: highbank: add SMP support
MAINTAINERS: add Calxeda Highbank ARM platform
ARM: add Highbank core platform support
ARM: highbank: add devicetree source
ARM: l2x0: add empty l2x0_of_init
picoxcell: add a definition of VMALLOC_END
picoxcell: remove custom ioremap implementation
picoxcell: add the DTS for the PC7302 board
picoxcell: add the DTS for pc3x2 and pc3x3 devices
...
Fix up trivial conflicts in arch/arm/Kconfig, and some more header file
conflicts in arch/arm/mach-omap2/board-generic.c (as per an ealier merge
by Arnd).
Diffstat (limited to 'arch/arm/mach-highbank/platsmp.c')
-rw-r--r-- | arch/arm/mach-highbank/platsmp.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/arm/mach-highbank/platsmp.c b/arch/arm/mach-highbank/platsmp.c new file mode 100644 index 0000000..d01364c --- /dev/null +++ b/arch/arm/mach-highbank/platsmp.c @@ -0,0 +1,78 @@ +/* + * Copyright 2010-2011 Calxeda, Inc. + * Based on platsmp.c, Copyright (C) 2002 ARM Ltd. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include <linux/init.h> +#include <linux/smp.h> +#include <linux/io.h> + +#include <asm/smp_scu.h> +#include <asm/hardware/gic.h> + +#include "core.h" + +extern void secondary_startup(void); + +void __cpuinit platform_secondary_init(unsigned int cpu) +{ + gic_secondary_init(0); +} + +int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle) +{ + gic_raise_softirq(cpumask_of(cpu), 0); + return 0; +} + +/* + * Initialise the CPU possible map early - this describes the CPUs + * which may be present or become present in the system. + */ +void __init smp_init_cpus(void) +{ + unsigned int i, ncores; + + ncores = scu_get_core_count(scu_base_addr); + + /* sanity check */ + if (ncores > NR_CPUS) { + printk(KERN_WARNING + "highbank: no. of cores (%d) greater than configured " + "maximum of %d - clipping\n", + ncores, NR_CPUS); + ncores = NR_CPUS; + } + + for (i = 0; i < ncores; i++) + set_cpu_possible(i, true); + + set_smp_cross_call(gic_raise_softirq); +} + +void __init platform_smp_prepare_cpus(unsigned int max_cpus) +{ + int i; + + scu_enable(scu_base_addr); + + /* + * Write the address of secondary startup into the jump table + * The cores are in wfi and wait until they receive a soft interrupt + * and a non-zero value to jump to. Then the secondary CPU branches + * to this address. + */ + for (i = 1; i < max_cpus; i++) + highbank_set_cpu_jump(i, secondary_startup); +} |