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Message-ID: <20200521003443.11385-5-Sergey.Semin@baikalelectronics.ru>
Date: Thu, 21 May 2020 03:34:33 +0300
From: Serge Semin <Sergey.Semin@...kalelectronics.ru>
To: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
CC: Serge Semin <Sergey.Semin@...kalelectronics.ru>,
Serge Semin <fancer.lancer@...il.com>,
Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
Paul Burton <paulburton@...nel.org>,
Ralf Baechle <ralf@...ux-mips.org>,
Arnd Bergmann <arnd@...db.de>,
Rob Herring <robh+dt@...nel.org>, <devicetree@...r.kernel.org>,
Thomas Bogendoerfer <tbogendoerfer@...e.de>,
Jiaxun Yang <jiaxun.yang@...goat.com>,
Huacai Chen <chenhc@...ote.com>,
Alexander Lobakin <alobakin@...nk.ru>,
Daniel Silsby <dansilsby@...il.com>,
René van Dorst <opensource@...rst.com>,
Herbert Xu <herbert@...dor.apana.org.au>,
Ard Biesheuvel <ardb@...nel.org>,
Cedric Hombourger <Cedric_Hombourger@...tor.com>,
Jessica Yu <jeyu@...nel.org>,
Masahiro Yamada <masahiroy@...nel.org>,
<linux-mips@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v3 04/14] mips: Add MIPS Warrior P5600 support
This is a MIPS32 Release 5 based IP core with XPA, EVA, dual/quad issue
exec pipes, MMU with two-levels TLB, UCA, MSA, MDU core level features
and system level features like up to six P5600 calculation cores, CM2
with L2 cache, IOCU/IOMMU (though might be unused depending on the
system-specific IP core configuration), GIC, CPC, virtualisation module,
eJTAG and PDtrace.
As being MIPS32 Release 5 based core it provides all the features
available by the CPU_MIPS32_R5 config, while adding a few more like
UCA attribute support, availability of CPU-freq (by means of L2/CM
clock ratio setting), EI/VI GIC modes detection at runtime.
In addition to this if P5600 architecture is enabled modern GNU GCC
provides a specific tuning for P5600 processors with respect to the
classic MIPS32 Release 5. First of all branch-likely avoidance is
activated only when the code is compiled with the speed optimization
(avoidance is always enabled for the pure MIPS32 Release 5
architecture). Secondly the madd/msub avoidance is enabled since
madd/msub utilization isn't profitable due to overhead of getting the
result out of the HI/LO registers. Multiply-accumulate instructions are
activated and utilized together with the necessary code reorder when
multiply-add/multiply-subtract statements are met. Finally load/store
bonding is activated by default. All of these optimizations may make
the code relatively faster than if just MIP32 release 5 architecture
was requested.
Co-developed-by: Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>
Signed-off-by: Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>
Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: Paul Burton <paulburton@...nel.org>
Cc: Ralf Baechle <ralf@...ux-mips.org>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: devicetree@...r.kernel.org
---
arch/mips/Kconfig | 37 +++++++++++++++++++++++++++-----
arch/mips/Makefile | 1 +
arch/mips/include/asm/vermagic.h | 2 ++
3 files changed, 35 insertions(+), 5 deletions(-)
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index ec3cd300981b..b0eff203fbd8 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1682,6 +1682,28 @@ config CPU_MIPS64_R6
family, are based on a MIPS64r6 processor. If you own an older
processor, you probably need to select MIPS64r1 or MIPS64r2 instead.
+config CPU_P5600
+ bool "MIPS Warrior P5600"
+ depends on SYS_HAS_CPU_P5600
+ select CPU_HAS_PREFETCH
+ select CPU_SUPPORTS_32BIT_KERNEL
+ select CPU_SUPPORTS_HIGHMEM
+ select CPU_SUPPORTS_MSA
+ select CPU_SUPPORTS_UNCACHED_ACCELERATED
+ select CPU_SUPPORTS_CPUFREQ
+ select CPU_MIPSR2_IRQ_VI
+ select CPU_MIPSR2_IRQ_EI
+ select HAVE_KVM
+ select MIPS_O32_FP64_SUPPORT
+ help
+ Choose this option to build a kernel for MIPS Warrior P5600 CPU.
+ It's based on MIPS32r5 ISA with XPA, EVA, dual/quad issue exec pipes,
+ MMU with two-levels TLB, UCA, MSA, MDU core level features and system
+ level features like up to six P5600 calculation cores, CM2 with L2
+ cache, IOCU/IOMMU (though might be unused depending on the system-
+ specific IP core configuration), GIC, CPC, virtualisation module,
+ eJTAG and PDtrace.
+
config CPU_R3000
bool "R3000"
depends on SYS_HAS_CPU_R3000
@@ -1858,7 +1880,8 @@ endchoice
config CPU_MIPS32_3_5_FEATURES
bool "MIPS32 Release 3.5 Features"
depends on SYS_HAS_CPU_MIPS32_R3_5
- depends on CPU_MIPS32_R2 || CPU_MIPS32_R5 || CPU_MIPS32_R6
+ depends on CPU_MIPS32_R2 || CPU_MIPS32_R5 || CPU_MIPS32_R6 || \
+ CPU_P5600
help
Choose this option to build a kernel for release 2 or later of the
MIPS32 architecture including features from the 3.5 release such as
@@ -1878,7 +1901,7 @@ config CPU_MIPS32_3_5_EVA
config CPU_MIPS32_R5_FEATURES
bool "MIPS32 Release 5 Features"
depends on SYS_HAS_CPU_MIPS32_R5
- depends on CPU_MIPS32_R2 || CPU_MIPS32_R5
+ depends on CPU_MIPS32_R2 || CPU_MIPS32_R5 || CPU_P5600
help
Choose this option to build a kernel for release 2 or later of the
MIPS32 architecture including features from release 5 such as
@@ -2033,6 +2056,10 @@ config SYS_HAS_CPU_MIPS64_R6
bool
select ARCH_HAS_SYNC_DMA_FOR_CPU if DMA_NONCOHERENT
+config SYS_HAS_CPU_P5600
+ bool
+ select ARCH_HAS_SYNC_DMA_FOR_CPU if DMA_NONCOHERENT
+
config SYS_HAS_CPU_R3000
bool
@@ -2117,7 +2144,7 @@ endmenu
config CPU_MIPS32
bool
default y if CPU_MIPS32_R1 || CPU_MIPS32_R2 || CPU_MIPS32_R5 || \
- CPU_MIPS32_R6
+ CPU_MIPS32_R6 || CPU_P5600
config CPU_MIPS64
bool
@@ -2140,7 +2167,7 @@ config CPU_MIPSR2
config CPU_MIPSR5
bool
- default y if CPU_MIPS32_R5 || CPU_MIPS64_R5
+ default y if CPU_MIPS32_R5 || CPU_MIPS64_R5 || CPU_P5600
select CPU_HAS_RIXI
select CPU_HAS_DIEI if !CPU_DIEI_BROKEN
select MIPS_SPRAM
@@ -2753,7 +2780,7 @@ config RELOCATABLE
depends on CPU_MIPS32_R2 || CPU_MIPS64_R2 || \
CPU_MIPS32_R5 || CPU_MIPS64_R5 || \
CPU_MIPS32_R6 || CPU_MIPS64_R6 || \
- CAVIUM_OCTEON_SOC
+ CPU_P5600 || CAVIUM_OCTEON_SOC
help
This builds a kernel image that retains relocation information
so it can be loaded someplace besides the default 1MB.
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 08c8d93d61ba..a6ccf4c0190c 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -177,6 +177,7 @@ cflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS64_R5) += -march=mips64r5 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap
+cflags-$(CONFIG_CPU_P5600) += -march=p5600 -Wa,--trap -modd-spreg
cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \
-Wa,--trap
diff --git a/arch/mips/include/asm/vermagic.h b/arch/mips/include/asm/vermagic.h
index 01d0ea9e9e23..4d2dae0c7c57 100644
--- a/arch/mips/include/asm/vermagic.h
+++ b/arch/mips/include/asm/vermagic.h
@@ -50,6 +50,8 @@
#define MODULE_PROC_FAMILY "LOONGSON64 "
#elif defined CONFIG_CPU_CAVIUM_OCTEON
#define MODULE_PROC_FAMILY "OCTEON "
+#elif defined CONFIG_CPU_P5600
+#define MODULE_PROC_FAMILY "P5600 "
#elif defined CONFIG_CPU_XLR
#define MODULE_PROC_FAMILY "XLR "
#elif defined CONFIG_CPU_XLP
--
2.25.1
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