From 968dc5a0eaca707f8eb2fbad57d9fbbf3284541e Mon Sep 17 00:00:00 2001 From: "谢致邦 (XIE Zhibang)" Date: Thu, 1 Jun 2017 18:41:34 +0800 Subject: MIPS: Loongson: Set Loongson32 to MIPS32R1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit LS232 (Loonson 2-issue 32-bit, also called GS232 (Godson 2-issue 32-bit)) is the CPU core (microarchitecture) of Loongson 1A/1B/1C. According to "LS232 用户手册 (LS232 User Manual)", LS232 implements the MIPS32 Release 1 instruction set, and part of the MIPS32 Release 2 instruction set. In the manual, LS232 implements all of the MIPS32R2 instruction set except the FPU instructions, and LS232 also implements 5 FPU instructions of the MIPS32R2 instruction set: CEIL.L.fmt, CVT.L.fmt, FLOOR.L.fmt, TRUNC.L.fmt, and ROUND.L.fmt. But a bug of the DI instruction has been found during tests, the DI instruction can not disable interrupts in arch_local_irq_disable() with CONFIG_PREEMPT_NONE=y and CFLAGS='-mno-branch-likely' in some cases. [paul.burton@mips.com: - Remove the _MIPS_ISA redefinition to match the change made for the generic MIPSr1 CPUs by commit 344ebf09949c ("MIPS: Always use -march=, not - shortcuts").] Signed-off-by: 谢致邦 (XIE Zhibang) Signed-off-by: Paul Burton Patchwork: https://patchwork.linux-mips.org/patch/16155/ Cc: linux-mips@linux-mips.org Cc: ralf@linux-mips.org --- arch/mips/Kconfig | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'arch/mips/Kconfig') diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index c95eb5ad0d96..642a56e2a1ea 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1424,7 +1424,8 @@ config CPU_LOONGSON1B select LEDS_GPIO_REGISTER help The Loongson 1B is a 32-bit SoC, which implements the MIPS32 - release 2 instruction set. + Release 1 instruction set and part of the MIPS32 Release 2 + instruction set. config CPU_LOONGSON1C bool "Loongson 1C" @@ -1433,7 +1434,8 @@ config CPU_LOONGSON1C select LEDS_GPIO_REGISTER help The Loongson 1C is a 32-bit SoC, which implements the MIPS32 - release 2 instruction set. + Release 1 instruction set and part of the MIPS32 Release 2 + instruction set. config CPU_MIPS32_R1 bool "MIPS32 Release 1" @@ -1833,7 +1835,7 @@ config CPU_LOONGSON2 config CPU_LOONGSON1 bool select CPU_MIPS32 - select CPU_MIPSR2 + select CPU_MIPSR1 select CPU_HAS_PREFETCH select CPU_SUPPORTS_32BIT_KERNEL select CPU_SUPPORTS_HIGHMEM -- cgit v1.2.3-59-g8ed1b