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>

1 files changed, 28 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