diff options
Diffstat (limited to 'arch/mips/Kconfig')
| -rw-r--r-- | arch/mips/Kconfig | 35 |
1 files changed, 21 insertions, 14 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 02b869df8ef8..783111156a37 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -444,7 +444,7 @@ config LASAT select SYS_SUPPORTS_LITTLE_ENDIAN config MACH_LOONGSON32 - bool "Loongson-1 family of machines" + bool "Loongson 32-bit family of machines" select SYS_SUPPORTS_ZBOOT help This enables support for the Loongson-1 family of machines. @@ -460,7 +460,7 @@ config MACH_LOONGSON2EF This enables the support of early Loongson-2E/F family of machines. config MACH_LOONGSON64 - bool "Loongson-2/3 GSx64 family of machines" + bool "Loongson 64-bit family of machines" select ARCH_SPARSEMEM_ENABLE select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_MIGHT_HAVE_PC_SERIO @@ -489,8 +489,12 @@ config MACH_LOONGSON64 select ZONE_DMA32 select NUMA help - This enables the support of Loongson-2/3 family of processors with - GSx64 microarchitecture. + This enables the support of Loongson-2/3 family of machines. + + Loongson-2 and Loongson-3 are 64-bit general-purpose processors with + GS264/GS464/GS464E/GS464V microarchitecture (except old Loongson-2E + and Loongson-2F which will be removed), developed by the Institute + of Computing Technology (ICT), Chinese Academy of Sciences (CAS). config MACH_PISTACHIO bool "IMG Pistachio SoC based boards" @@ -1432,7 +1436,7 @@ choice default CPU_R4X00 config CPU_LOONGSON64 - bool "Loongson GSx64 CPU" + bool "Loongson 64-bit CPU" depends on SYS_HAS_CPU_LOONGSON64 select ARCH_HAS_PHYS_TO_DMA select CPU_SUPPORTS_64BIT_KERNEL @@ -1448,17 +1452,20 @@ config CPU_LOONGSON64 select GPIOLIB select SWIOTLB help - The Loongson GSx64 series of processor cores implements the - MIPS64R2 instruction set with many extensions. + The Loongson GSx64(GS264/GS464/GS464E/GS464V) series of processor + cores implements the MIPS64R2 instruction set with many extensions, + including most 64-bit Loongson-2 (2H, 2K) and Loongson-3 (3A1000, + 3B1000, 3B1500, 3A2000, 3A3000 and 3A4000) processors. However, old + Loongson-2E/2F is not covered here and will be removed in future. -config LOONGSON64_ENHANCEMENT - bool "New Loongson GSx64E CPU Enhancements" +config LOONGSON3_ENHANCEMENT + bool "New Loongson-3 CPU Enhancements" default n select CPU_MIPSR2 select CPU_HAS_PREFETCH depends on CPU_LOONGSON64 help - New Loongson GSx64E cores (since Loongson-3A R2, as opposed to Loongson-3A + New Loongson-3 cores (since Loongson-3A R2, as opposed to Loongson-3A R1, Loongson-3B R1 and Loongson-3B R2) has many enhancements, such as FTLB, L1-VCache, EI/DI/Wait/Prefetch instruction, DSP/DSPr2 ASE, User Local register, Read-Inhibit/Execute-Inhibit, SFB (Store Fill Buffer), @@ -1467,17 +1474,17 @@ config LOONGSON64_ENHANCEMENT This option enable those enhancements which are not probed at run time. If you want a generic kernel to run on all Loongson 3 machines, please say 'N' here. If you want a high-performance kernel to run on - new Loongson 3 machines only, please say 'Y' here. + new Loongson-3 machines only, please say 'Y' here. config CPU_LOONGSON3_WORKAROUNDS - bool "Old Loongson 3 LLSC Workarounds" + bool "Old Loongson-3 LLSC Workarounds" default y if SMP depends on CPU_LOONGSON64 help - Loongson 3 processors have the llsc issues which require workarounds. + Loongson-3 processors have the llsc issues which require workarounds. Without workarounds the system may hang unexpectedly. - Newer Loongson 3 will fix these issues and no workarounds are needed. + Newer Loongson-3 will fix these issues and no workarounds are needed. The workarounds have no significant side effect on them but may decrease the performance of the system so this option should be disabled unless the kernel is intended to be run on old systems. |