SYS_SUPPORTS_MULTITHREADING和CONFIG_MIPS_MT_SMTC

adaptiver

于 2011-09-30 13:52:04 发布

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分类专栏： mips 文章标签： multithreading

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本文详细解释了MIPS处理器中多线程支持的配置选项，包括SYS_SUPPORTS_MULTITHREADING和CONFIG_MIPS_MT_SMTC的含义及其相互依赖关系。重点介绍了SMTC模型在多核环境中的应用。

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没有定义 SYS_SUPPORTS_MULTITHREADING的话就不会定义CONFIG_MIPS_MT_SMTC

SYS_SUPPORTS_MULTITHREADING：
config SYS_SUPPORTS_MULTITHREADING
bool
config MIPS_MALTA
config MIPS_SIM
config MIPS_MT_SMP
config MIPS_MT_SMTC
config MIPS_VPE_LOADER
select SYS_SUPPORTS_MULTITHREADING

CONFIG_MIPS_MT_SMTC：
config MIPS_MT_SMTC
bool "SMTC: Use all TCs on all VPEs for SMP"
depends on CPU_MIPS32_R2
#depends on CPU_MIPS64_R2  # once there is hardware ...
depends on SYS_SUPPORTS_MULTITHREADING
select CPU_MIPSR2_IRQ_VI
select CPU_MIPSR2_IRQ_EI
select MIPS_MT
select NR_CPUS_DEFAULT_8
select SMP
select SYS_SUPPORTS_SMP
select SMP_UP
help
   This is a kernel model which is known a SMTC or lately has been
   marketesed into SMVP.
config ARCH_SUPPORTS_OPROFILE
bool
default y if !MIPS_MT_SMTC