Signed-off-by: Raphael Poggi <poggi.r...@gmail.com>
---
arch/arm/include/asm/system_info.h | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/arch/arm/include/asm/system_info.h
b/arch/arm/include/asm/system_info.h
index 0761848..25fffd2 100644
--- a/arch/arm/include/asm/system_info.h
+++ b/arch/arm/include/asm/system_info.h
@@ -13,6 +13,7 @@
#define CPU_ARCH_ARMv5TEJ 7
#define CPU_ARCH_ARMv6 8
#define CPU_ARCH_ARMv7 9
+#define CPU_ARCH_ARMv8 10
#define CPU_IS_ARM720 0x41007200
#define CPU_IS_ARM720_MASK 0xff00fff0
@@ -41,6 +42,12 @@
#define CPU_IS_CORTEX_A15 0x410fc0f0
#define CPU_IS_CORTEX_A15_MASK 0xff0ffff0
+#define CPU_IS_CORTEX_A53 0x410fd034
+#define CPU_IS_CORTEX_A53_MASK 0xff0ffff0
+
+#define CPU_IS_CORTEX_A57 0x411fd070
+#define CPU_IS_CORTEX_A57_MASK 0xff0ffff0
+
#define CPU_IS_PXA250 0x69052100
#define CPU_IS_PXA250_MASK 0xfffff7f0
@@ -112,6 +119,19 @@
#define cpu_is_cortex_a15() (0)
#endif
+#ifdef CONFIG_CPU_64v8
+#ifdef ARM_ARCH
+#define ARM_MULTIARCH
+#else
+#define ARM_ARCH CPU_ARCH_ARMv8
+#endif
+#define cpu_is_cortex_a53() cpu_is_arm(CORTEX_A53)
+#define cpu_is_cortex_a57() cpu_is_arm(CORTEX_A57)
+#else
+#define cpu_is_cortex_a53() (0)
+#define cpu_is_cortex_a57() (0)
+#endif
+
#ifndef __ASSEMBLY__
#ifdef ARM_MULTIARCH
@@ -133,6 +153,23 @@ static inline int arm_early_get_cpu_architecture(void)
if (cpu_arch)
cpu_arch += CPU_ARCH_ARMv3;
} else if ((read_cpuid_id() & 0x000f0000) == 0x000f0000) {
+#ifdef CONFIG_CPU_64v8
+ unsigned int isar2;
+
+ __asm__ __volatile__(
+ "mrs %0, id_isar2_el1\n"
+ : "=r" (isar2)
+ :
+ : "memory");
+
+
+ /* Check Load/Store acquire to check if ARMv8 or not */
+
+ if (isar2 & 0x2)
+ cpu_arch = CPU_ARCH_ARMv8;
+ else
+ cpu_arch = CPU_ARCH_UNKNOWN;
+#else
unsigned int mmfr0;
/* Revised CPUID format. Read the Memory Model Feature
@@ -149,6 +186,7 @@ static inline int arm_early_get_cpu_architecture(void)
cpu_arch = CPU_ARCH_UNKNOWN;
} else
cpu_arch = CPU_ARCH_UNKNOWN;
+#endif
return cpu_arch;
}
--
2.1.0
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