[PATCH v2 08/31] arm64: CPU support

diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h
new file mode 100644
index 0000000..ef54125
--- /dev/null
+++ b/arch/arm64/include/asm/cputype.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_CPUTYPE_H
+#define __ASM_CPUTYPE_H
+
+#define ID_MIDR_EL1		"midr_el1"
+#define ID_CTR_EL0		"ctr_el0"
+
+#define ID_AA64PFR0_EL1		"id_aa64pfr0_el1"
+#define ID_AA64DFR0_EL1		"id_aa64dfr0_el1"
+#define ID_AA64AFR0_EL1		"id_aa64afr0_el1"
+#define ID_AA64ISAR0_EL1	"id_aa64isar0_el1"
+#define ID_AA64MMFR0_EL1	"id_aa64mmfr0_el1"
+
+#define read_cpuid(reg) ({						\
+	u64 __val;							\
+	asm("mrs	%0, " reg : "=r" (__val));			\
+	__val;								\
+})
+
+/*
+ * The CPU ID never changes at run time, so we might as well tell the
+ * compiler that it's constant.  Use this function to read the CPU ID
+ * rather than directly reading processor_id or read_cpuid() directly.
+ */
+static inline u32 __attribute_const__ read_cpuid_id(void)
+{
+	return read_cpuid(ID_MIDR_EL1);
+}
+
+static inline u32 __attribute_const__ read_cpuid_cachetype(void)
+{
+	return read_cpuid(ID_CTR_EL0);
+}

diff --git a/arch/arm64/include/asm/procinfo.h b/arch/arm64/include/asm/procinfo.h
new file mode 100644
index 0000000..81fece9
--- /dev/null
+++ b/arch/arm64/include/asm/procinfo.h

@@ -0,0 +1,44 @@
+/*
+ * Based on arch/arm/include/asm/procinfo.h
+ *
+ * Copyright (C) 1996-1999 Russell King
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_PROCINFO_H
+#define __ASM_PROCINFO_H
+
+#ifdef __KERNEL__
+
+/*
+ * Note!  struct processor is always defined if we're
+ * using MULTI_CPU, otherwise this entry is unused,
+ * but still exists.

+struct proc_info_list {
+	unsigned int		cpu_val;
+	unsigned int		cpu_mask;
+	unsigned long		__cpu_flush;		/* used by head.S */
+	const char		*cpu_name;
+};
+
+#else	/* __KERNEL__ */
+#include <asm/elf.h>
+#warning "Please include asm/elf.h instead"
+#endif	/* __KERNEL__ */
+#endif

diff --git a/arch/arm64/mm/proc-syms.c b/arch/arm64/mm/proc-syms.c
new file mode 100644
index 0000000..2d99ef9
--- /dev/null
+++ b/arch/arm64/mm/proc-syms.c

@@ -0,0 +1,31 @@
+/*
+ * Based on arch/arm/mm/proc-syms.c
+ *
+ * Copyright (C) 2000-2002 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/export.h>
+#include <linux/mm.h>
+
+#include <asm/cacheflush.h>
+#include <asm/proc-fns.h>
+#include <asm/tlbflush.h>
+#include <asm/page.h>
+
+EXPORT_SYMBOL(__cpuc_flush_kern_all);
+EXPORT_SYMBOL(__cpuc_flush_user_all);
+EXPORT_SYMBOL(__cpuc_flush_user_range);
+EXPORT_SYMBOL(__cpuc_coherent_kern_range);
+EXPORT_SYMBOL(__cpuc_flush_dcache_area);

diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S
new file mode 100644
index 0000000..453f517
--- /dev/null
+++ b/arch/arm64/mm/proc.S

@@ -0,0 +1,193 @@
+	.section ".proc.info.init", #alloc, #execinstr
+
+	.type	__v8_proc_info, #object
+__v8_proc_info:
+	.long	0x000f0000			// Required ID value
+	.long	0x000f0000			// Mask for ID
+	b	__cpu_setup
+	nop
+	.quad	cpu_name
+	.long	0
+	.size	__v8_proc_info, . - __v8_proc_info