ARM: add support for the Cortex-A12 processor

The A12 behaves as the A7/A15 does with respect to setting the SMP bit, and
doesn't require TLB ops broadcasting to be explicitly enabled like the A9 does.

Note that as the ACTLR cannot (usually) be written from non-secure, it is the
responsibility of the bootloader/firmware to set this bit per core - it is
done here in Linux as last resort in case of bad firmware.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Jonathan Austin <jonathan.austin@arm.com>

diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h
index dba62cb1ad080f4a84202b68b2c53b873c68394c..3b74a681a0086c5d48ab218d162b956e79ed0309 100644 (file)
--- a/arch/arm/include/asm/cputype.h
+++ b/arch/arm/include/asm/cputype.h
@@ -52,6 +52,7 @@
 #define ARM_CPU_PART_CORTEX_A5         0xC050
 #define ARM_CPU_PART_CORTEX_A15                0xC0F0
 #define ARM_CPU_PART_CORTEX_A7         0xC070
+#define ARM_CPU_PART_CORTEX_A12                0xC0D0
 
 #define ARM_CPU_XSCALE_ARCH_MASK       0xe000
 #define ARM_CPU_XSCALE_ARCH_V1         0x2000

diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index 5fbccee5f644e66c2d1ffcfc309463942fe148a7..8993887b06055e9736034547685f61e7d2dc8629 100644 (file)
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -182,6 +182,7 @@ __v7_ca9mp_setup:
        mov     r10, #(1 << 0)                  @ TLB ops broadcasting
        b       1f
 __v7_ca7mp_setup:
+__v7_ca12mp_setup:
 __v7_ca15mp_setup:
        mov     r10, #0
 1:
@@ -453,6 +454,16 @@ __v7_ca7mp_proc_info:
        __v7_proc __v7_ca7mp_setup
        .size   __v7_ca7mp_proc_info, . - __v7_ca7mp_proc_info
 
+       /*
+        * ARM Ltd. Cortex A12 processor.
+        */
+       .type   __v7_ca12mp_proc_info, #object
+__v7_ca12mp_proc_info:
+       .long   0x410fc0d0
+       .long   0xff0ffff0
+       __v7_proc __v7_ca12mp_setup
+       .size   __v7_ca12mp_proc_info, . - __v7_ca12mp_proc_info
+
        /*
         * ARM Ltd. Cortex A15 processor.
         */