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>

1 files changed, 26 insertions, 0 deletions

diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
index 77d614232d81..def02483286a 100644
--- a/arch/arm/boot/compressed/head.S
+++ b/arch/arm/boot/compressed/head.S
@@ -459,6 +459,20 @@ __armv7_mmu_cache_on:
                 mcr     p15, 0, r0, c7, c5, 4   @ ISB
                 mov     pc, r12
 
+__fa526_cache_on:
+                mov     r12, lr
+                bl      __setup_mmu
+                mov     r0, #0
+                mcr     p15, 0, r0, c7, c7, 0   @ Invalidate whole cache
+                mcr     p15, 0, r0, c7, c10, 4  @ drain write buffer
+                mcr     p15, 0, r0, c8, c7, 0   @ flush UTLB
+                mrc     p15, 0, r0, c1, c0, 0   @ read control reg
+                orr     r0, r0, #0x1000         @ I-cache enable
+                bl      __common_mmu_cache_on
+                mov     r0, #0
+                mcr     p15, 0, r0, c8, c7, 0   @ flush UTLB
+                mov     pc, r12
+
 __arm6_mmu_cache_on:
                 mov     r12, lr
                 bl      __setup_mmu
@@ -636,6 +650,12 @@ proc_types:
                 b       __armv4_mmu_cache_off
                 b       __armv5tej_mmu_cache_flush
 
+                .word   0x66015261              @ FA526
+                .word   0xff01fff1
+                b       __fa526_cache_on
+                b       __armv4_mmu_cache_off
+                b       __fa526_cache_flush
+
                 @ These match on the architecture ID
 
                 .word   0x00020000              @ ARMv4T
@@ -775,6 +795,12 @@ __armv4_mpu_cache_flush:
                 mcr     p15, 0, ip, c7, c10, 4  @ drain WB
                 mov     pc, lr
                 
+__fa526_cache_flush:
+                mov     r1, #0
+                mcr     p15, 0, r1, c7, c14, 0  @ clean and invalidate D cache
+                mcr     p15, 0, r1, c7, c5, 0   @ flush I cache
+                mcr     p15, 0, r1, c7, c10, 4  @ drain WB
+                mov     pc, lr
 
 __armv6_mmu_cache_flush:
                 mov     r1, #0