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| author | Zhang Zhuoyu <Zhuoyu.Zhang@freescale.com> | 2014-10-21 07:11:40 (GMT) |
|---|---|---|
| committer | Matthew Weigel <Matthew.Weigel@freescale.com> | 2014-12-11 18:38:49 (GMT) |
| commit | db4f06cb334bbd91a9ba26f79137292b3597aec8 (patch) | |
| tree | eb40d07c9debced123462c1749014aafd8e33131 /arch/arm/mach-imx/common.h | |
| parent | 673581d1ac66bce8d14567b9b539fb956f7e580d (diff) | |
| download | linux-fsl-qoriq-db4f06cb334bbd91a9ba26f79137292b3597aec8.tar.xz | |
ARM:LS1021aQDS: add CPU hotplug platform support
This is only a CPU pseudo-hotplug, and incompatible with kexec mechanics.
As per the discussion with Russell King in opensource community, CPU hotplug
should reset the secondary core to be compatible with kexec.
"In the kexec case, when the secondary CPU wakeup, the code it is executing
can already been overwritten, which then means that the CPU ends up executing
some random code instead."
For LS102x platforms, resetting core can be realized, but come across cache
coherence problem which is still unresolved, we will submit another patch to
implement CPU hotplug by resetting core once cache coherence issue resloved.
Signed-off-by: Zhang Zhuoyu <Zhuoyu.Zhang@freescale.com>
---
Patch Sent Upstream
url: https://lkml.org/lkml/2014/9/26/422
Change-Id: I36509f99299f874ef0df891a33c907a749649527
Reviewed-on: http://git.am.freescale.net:8181/21918
Tested-by: Review Code-CDREVIEW <CDREVIEW@freescale.com>
Reviewed-by: Yang Li <LeoLi@freescale.com>
Reviewed-by: Zhengxiong Jin <Jason.Jin@freescale.com>
Diffstat (limited to 'arch/arm/mach-imx/common.h')
| -rw-r--r-- | arch/arm/mach-imx/common.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h index 7079ace..b34ff2e 100644 --- a/arch/arm/mach-imx/common.h +++ b/arch/arm/mach-imx/common.h @@ -115,6 +115,7 @@ void tzic_handle_irq(struct pt_regs *); extern void imx_enable_cpu(int cpu, bool enable); extern void imx_set_cpu_jump(int cpu, void *jump_addr); extern u32 imx_get_cpu_arg(int cpu); +extern u32 ls1_get_cpu_arg(int cpu); extern void imx_set_cpu_arg(int cpu, u32 arg); extern void v7_cpu_resume(void); #ifdef CONFIG_SMP @@ -145,6 +146,9 @@ extern void imx6q_set_chicken_bit(void); extern void imx_cpu_die(unsigned int cpu); extern int imx_cpu_kill(unsigned int cpu); +extern void ls1021a_cpu_die(unsigned int cpu); +extern int ls1021a_cpu_kill(unsigned int cpu); + #ifdef CONFIG_PM extern void imx6q_pm_init(void); extern void imx5_pm_init(void); |