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[MIPS] Qemu: Fix Symmetric Uniprocessor support.
Might be useful for SMP debugging. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> [Rewritten Kconfig bits to deal better fit in the usual pattern of doing things - Ralf] Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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2 changed files with 19 additions and 3 deletions
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@ -542,6 +542,8 @@ config QEMU
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select SYS_SUPPORTS_LITTLE_ENDIAN
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select SYS_SUPPORTS_LITTLE_ENDIAN
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select ARCH_SPARSEMEM_ENABLE
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select ARCH_SPARSEMEM_ENABLE
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select GENERIC_HARDIRQS_NO__DO_IRQ
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select GENERIC_HARDIRQS_NO__DO_IRQ
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select NR_CPUS_DEFAULT_1
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select SYS_SUPPORTS_SMP
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help
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help
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Qemu is a software emulator which among other architectures also
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Qemu is a software emulator which among other architectures also
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can simulate a MIPS32 4Kc system. This patch adds support for the
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can simulate a MIPS32 4Kc system. This patch adds support for the
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@ -1805,6 +1807,9 @@ config SMP
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config SYS_SUPPORTS_SMP
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config SYS_SUPPORTS_SMP
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bool
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bool
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config NR_CPUS_DEFAULT_1
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bool
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config NR_CPUS_DEFAULT_2
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config NR_CPUS_DEFAULT_2
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bool
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bool
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@ -1825,8 +1830,9 @@ config NR_CPUS_DEFAULT_64
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config NR_CPUS
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config NR_CPUS
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int "Maximum number of CPUs (2-64)"
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int "Maximum number of CPUs (2-64)"
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range 2 64
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range 1 64 if NR_CPUS_DEFAULT_1
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depends on SMP
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depends on SMP
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default "1" if NR_CPUS_DEFAULT_1
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default "2" if NR_CPUS_DEFAULT_2
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default "2" if NR_CPUS_DEFAULT_2
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default "4" if NR_CPUS_DEFAULT_4
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default "4" if NR_CPUS_DEFAULT_4
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default "8" if NR_CPUS_DEFAULT_8
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default "8" if NR_CPUS_DEFAULT_8
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@ -1837,10 +1843,13 @@ config NR_CPUS
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This allows you to specify the maximum number of CPUs which this
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This allows you to specify the maximum number of CPUs which this
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kernel will support. The maximum supported value is 32 for 32-bit
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kernel will support. The maximum supported value is 32 for 32-bit
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kernel and 64 for 64-bit kernels; the minimum value which makes
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kernel and 64 for 64-bit kernels; the minimum value which makes
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sense is 2.
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sense is 1 for Qemu (useful only for kernel debugging purposes)
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and 2 for all others.
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This is purely to save memory - each supported CPU adds
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This is purely to save memory - each supported CPU adds
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approximately eight kilobytes to the kernel image.
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approximately eight kilobytes to the kernel image. For best
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performance should round up your number of processors to the next
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power of two.
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#
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#
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# Timer Interrupt Frequency Configuration
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# Timer Interrupt Frequency Configuration
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@ -46,3 +46,10 @@ void __init prom_prepare_cpus(unsigned int max_cpus)
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void prom_boot_secondary(int cpu, struct task_struct *idle)
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void prom_boot_secondary(int cpu, struct task_struct *idle)
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{
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{
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}
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}
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void __init plat_smp_setup(void)
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{
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}
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void __init plat_prepare_cpus(unsigned int max_cpus)
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{
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}
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