MIPS: Loongson: Add Loongson-3 Kconfig options

Added Kconfig options include: Loongson-3 CPU and machine definition,
CPU cache features, UEFI-like firmware interface (LEFI), HT-linked PCI,
and swiotlb support.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Hongliang Tao <taohl@lemote.com>
Signed-off-by: Hua Yan <yanh@lemote.com>
Tested-by: Alex Smith <alex.smith@imgtec.com>
Reviewed-by: Alex Smith <alex.smith@imgtec.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/6637
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

3 files changed, 75 insertions, 1 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 5a95acafcd05..a5ea11d8ec4e 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1153,6 +1153,18 @@ choice
         prompt "CPU type"
         default CPU_R4X00
 
+config CPU_LOONGSON3
+        bool "Loongson 3 CPU"
+        depends on SYS_HAS_CPU_LOONGSON3
+        select CPU_SUPPORTS_64BIT_KERNEL
+        select CPU_SUPPORTS_HIGHMEM
+        select CPU_SUPPORTS_HUGEPAGES
+        select WEAK_ORDERING
+        select WEAK_REORDERING_BEYOND_LLSC
+        help
+                The Loongson 3 processor implements the MIPS64R2 instruction
+                set with many extensions.
+
 config CPU_LOONGSON2E
         bool "Loongson 2E"
         depends on SYS_HAS_CPU_LOONGSON2E
@@ -1549,6 +1561,10 @@ config CPU_BMIPS5000
         select SYS_SUPPORTS_SMP
         select SYS_SUPPORTS_HOTPLUG_CPU
 
+config SYS_HAS_CPU_LOONGSON3
+        bool
+        select CPU_SUPPORTS_CPUFREQ
+
 config SYS_HAS_CPU_LOONGSON2E
         bool
 
@@ -1761,7 +1777,7 @@ choice
 
 config PAGE_SIZE_4KB
         bool "4kB"
-        depends on !CPU_LOONGSON2
+        depends on !CPU_LOONGSON2 && !CPU_LOONGSON3
         help
          This option select the standard 4kB Linux page size.  On some
          R3000-family processors this is the only available page size.  Using
@@ -2493,6 +2509,17 @@ config PCI
           your box. Other bus systems are ISA, EISA, or VESA. If you have PCI,
           say Y, otherwise N.
 
+config HT_PCI
+        bool "Support for HT-linked PCI"
+        default y
+        depends on CPU_LOONGSON3
+        select PCI
+        select PCI_DOMAINS
+        help
+          Loongson family machines use Hyper-Transport bus for inter-core
+          connection and device connection. The PCI bus is a subordinate
+          linked at HT. Choose Y for Loongson-3 based machines.
+
 config PCI_DOMAINS
         bool
 
diff --git a/arch/mips/loongson/Kconfig b/arch/mips/loongson/Kconfig
index 263beb9322a8..a5d46f5efe03 100644
--- a/arch/mips/loongson/Kconfig
+++ b/arch/mips/loongson/Kconfig
@@ -59,6 +59,35 @@ config LEMOTE_MACH2F
 
           These family machines include fuloong2f mini PC, yeeloong2f notebook,
           LingLoong allinone PC and so forth.
+
+config LEMOTE_MACH3A
+        bool "Lemote Loongson 3A family machines"
+        select ARCH_SPARSEMEM_ENABLE
+        select GENERIC_ISA_DMA_SUPPORT_BROKEN
+        select GENERIC_HARDIRQS_NO__DO_IRQ
+        select BOOT_ELF32
+        select BOARD_SCACHE
+        select CSRC_R4K
+        select CEVT_R4K
+        select CPU_HAS_WB
+        select HW_HAS_PCI
+        select ISA
+        select HT_PCI
+        select I8259
+        select IRQ_CPU
+        select NR_CPUS_DEFAULT_4
+        select SYS_HAS_CPU_LOONGSON3
+        select SYS_HAS_EARLY_PRINTK
+        select SYS_SUPPORTS_SMP
+        select SYS_SUPPORTS_64BIT_KERNEL
+        select SYS_SUPPORTS_HIGHMEM
+        select SYS_SUPPORTS_LITTLE_ENDIAN
+        select LOONGSON_MC146818
+        select ZONE_DMA32
+        select LEFI_FIRMWARE_INTERFACE
+        help
+                Lemote Loongson 3A family machines utilize the 3A revision of
+                Loongson processor and RS780/SBX00 chipset.
 endchoice
 
 config CS5536
@@ -86,8 +115,25 @@ config LOONGSON_UART_BASE
         default y
         depends on EARLY_PRINTK || SERIAL_8250
 
+config IOMMU_HELPER
+        bool
+
+config NEED_SG_DMA_LENGTH
+        bool
+
+config SWIOTLB
+        bool "Soft IOMMU Support for All-Memory DMA"
+        default y
+        depends on CPU_LOONGSON3
+        select IOMMU_HELPER
+        select NEED_SG_DMA_LENGTH
+        select NEED_DMA_MAP_STATE
+
 config LOONGSON_MC146818
         bool
         default n
 
+config LEFI_FIRMWARE_INTERFACE
+        bool
+
 endif # MACH_LOONGSON
diff --git a/arch/mips/loongson/Platform b/arch/mips/loongson/Platform
index 29692e5433b1..6205372b6c2d 100644
--- a/arch/mips/loongson/Platform
+++ b/arch/mips/loongson/Platform
@@ -30,3 +30,4 @@ platform-$(CONFIG_MACH_LOONGSON) += loongson/
 cflags-$(CONFIG_MACH_LOONGSON) += -I$(srctree)/arch/mips/include/asm/mach-loongson -mno-branch-likely
 load-$(CONFIG_LEMOTE_FULOONG2E) += 0xffffffff80100000
 load-$(CONFIG_LEMOTE_MACH2F) += 0xffffffff80200000
+load-$(CONFIG_CPU_LOONGSON3) += 0xffffffff80200000