ARM: Add support for FA526 v2

Adds support for Faraday FA526 core. This core is used at least by:
Cortina Systems Gemini and Centroid family
Cavium Networks ECONA family
Grain Media GM8120
Pixelplus ImageARM
Prolific PL-1029
Faraday IP evaluation boards

v2:
- move TLB_BTB to separate patch
- update copyrights

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>

5 files changed, 49 insertions, 0 deletions

diff --git a/arch/arm/include/asm/cacheflush.h b/arch/arm/include/asm/cacheflush.h
index 6cbd8fdc9f1f..a6b8b90ed57f 100644
--- a/arch/arm/include/asm/cacheflush.h
+++ b/arch/arm/include/asm/cacheflush.h
@@ -46,6 +46,14 @@
 # define MULTI_CACHE 1
 #endif
 
+#if defined(CONFIG_CPU_FA526)
+# ifdef _CACHE
+#  define MULTI_CACHE 1
+# else
+#  define _CACHE fa
+# endif
+#endif
+
 #if defined(CONFIG_CPU_ARM926T)
 # ifdef _CACHE
 #  define MULTI_CACHE 1
diff --git a/arch/arm/include/asm/page.h b/arch/arm/include/asm/page.h
index f341c9dbd662..e6eb8a67b807 100644
--- a/arch/arm/include/asm/page.h
+++ b/arch/arm/include/asm/page.h
@@ -76,6 +76,14 @@
 # endif
 #endif
 
+#ifdef CONFIG_CPU_COPY_FA
+# ifdef _USER
+#  define MULTI_USER 1
+# else
+#  define _USER fa
+# endif
+#endif
+
 #ifdef CONFIG_CPU_SA1100
 # ifdef _USER
 #  define MULTI_USER 1
diff --git a/arch/arm/include/asm/proc-fns.h b/arch/arm/include/asm/proc-fns.h
index db80203b68e0..00949281d3ee 100644
--- a/arch/arm/include/asm/proc-fns.h
+++ b/arch/arm/include/asm/proc-fns.h
@@ -89,6 +89,14 @@
 #   define CPU_NAME cpu_arm922
 #  endif
 # endif
+# ifdef CONFIG_CPU_FA526
+#  ifdef CPU_NAME
+#   undef  MULTI_CPU
+#   define MULTI_CPU
+#  else
+#   define CPU_NAME cpu_fa526
+#  endif
+# endif
 # ifdef CONFIG_CPU_ARM925T
 #  ifdef CPU_NAME
 #   undef  MULTI_CPU
diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
index 811be55f338e..d6a4dad99c9b 100644
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -125,6 +125,12 @@ extern unsigned int user_debug;
                                     : : "r" (0) : "memory")
 #define dmb() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" \
                                     : : "r" (0) : "memory")
+#elif defined(CONFIG_CPU_FA526)
+#define isb() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c5, 4" \
+                                    : : "r" (0) : "memory")
+#define dsb() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 4" \
+                                    : : "r" (0) : "memory")
+#define dmb() __asm__ __volatile__ ("" : : : "memory")
 #else
 #define isb() __asm__ __volatile__ ("" : : : "memory")
 #define dsb() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 4" \
diff --git a/arch/arm/include/asm/tlbflush.h b/arch/arm/include/asm/tlbflush.h
index ffedd2494eab..a62218013c78 100644
--- a/arch/arm/include/asm/tlbflush.h
+++ b/arch/arm/include/asm/tlbflush.h
@@ -54,6 +54,7 @@
  *        v4wb  - ARMv4 with write buffer without I TLB flush entry instruction
  *        v4wbi - ARMv4 with write buffer with I TLB flush entry instruction
  *        fr    - Feroceon (v4wbi with non-outer-cacheable page table walks)
+ *        fa    - Faraday (v4 with write buffer with UTLB and branch target buffer (BTB))
  *        v6wbi - ARMv6 with write buffer with I TLB flush entry instruction
  *        v7wbi - identical to v6wbi
  */
@@ -90,6 +91,22 @@
 # define v4_always_flags        (-1UL)
 #endif
 
+#define fa_tlb_flags    (TLB_WB | TLB_BTB | TLB_DCLEAN | \
+                         TLB_V4_U_FULL | TLB_V4_U_PAGE)
+
+#ifdef CONFIG_CPU_TLB_FA
+# define fa_possible_flags      fa_tlb_flags
+# define fa_always_flags        fa_tlb_flags
+# ifdef _TLB
+#  define MULTI_TLB 1
+# else
+#  define _TLB fa
+# endif
+#else
+# define fa_possible_flags      0
+# define fa_always_flags        (-1UL)
+#endif
+
 #define v4wbi_tlb_flags (TLB_WB | TLB_DCLEAN | \
                          TLB_V4_I_FULL | TLB_V4_D_FULL | \
                          TLB_V4_I_PAGE | TLB_V4_D_PAGE)
@@ -268,6 +285,7 @@ extern struct cpu_tlb_fns cpu_tlb;
                                  v4wbi_possible_flags | \
                                  fr_possible_flags | \
                                  v4wb_possible_flags | \
+                                 fa_possible_flags | \
                                  v6wbi_possible_flags | \
                                  v7wbi_possible_flags)
 
@@ -276,6 +294,7 @@ extern struct cpu_tlb_fns cpu_tlb;
                                  v4wbi_always_flags & \
                                  fr_always_flags & \
                                  v4wb_always_flags & \
+                                 fa_always_flags & \
                                  v6wbi_always_flags & \
                                  v7wbi_always_flags)