Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm64 / include / asm / processor.h

diff --git a/kernel/arch/arm64/include/asm/processor.h b/kernel/arch/arm64/include/asm/processor.h
new file mode 100644 (file)
index 0000000..d2c37a1
--- /dev/null
+++ b/kernel/arch/arm64/include/asm/processor.h
@@ -0,0 +1,172 @@
+/*
+ * Based on arch/arm/include/asm/processor.h
+ *
+ * Copyright (C) 1995-1999 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_PROCESSOR_H
+#define __ASM_PROCESSOR_H
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr() ({ __label__ _l; _l: &&_l;})
+
+#ifdef __KERNEL__
+
+#include <linux/string.h>
+
+#include <asm/fpsimd.h>
+#include <asm/hw_breakpoint.h>
+#include <asm/pgtable-hwdef.h>
+#include <asm/ptrace.h>
+#include <asm/types.h>
+
+#ifdef __KERNEL__
+#define STACK_TOP_MAX          TASK_SIZE_64
+#ifdef CONFIG_COMPAT
+#define AARCH32_VECTORS_BASE   0xffff0000
+#define STACK_TOP              (test_thread_flag(TIF_32BIT) ? \
+                               AARCH32_VECTORS_BASE : STACK_TOP_MAX)
+#else
+#define STACK_TOP              STACK_TOP_MAX
+#endif /* CONFIG_COMPAT */
+
+extern phys_addr_t arm64_dma_phys_limit;
+#define ARCH_LOW_ADDRESS_LIMIT (arm64_dma_phys_limit - 1)
+#endif /* __KERNEL__ */
+
+struct debug_info {
+       /* Have we suspended stepping by a debugger? */
+       int                     suspended_step;
+       /* Allow breakpoints and watchpoints to be disabled for this thread. */
+       int                     bps_disabled;
+       int                     wps_disabled;
+       /* Hardware breakpoints pinned to this task. */
+       struct perf_event       *hbp_break[ARM_MAX_BRP];
+       struct perf_event       *hbp_watch[ARM_MAX_WRP];
+};
+
+struct cpu_context {
+       unsigned long x19;
+       unsigned long x20;
+       unsigned long x21;
+       unsigned long x22;
+       unsigned long x23;
+       unsigned long x24;
+       unsigned long x25;
+       unsigned long x26;
+       unsigned long x27;
+       unsigned long x28;
+       unsigned long fp;
+       unsigned long sp;
+       unsigned long pc;
+};
+
+struct thread_struct {
+       struct cpu_context      cpu_context;    /* cpu context */
+       unsigned long           tp_value;
+       struct fpsimd_state     fpsimd_state;
+       unsigned long           fault_address;  /* fault info */
+       unsigned long           fault_code;     /* ESR_EL1 value */
+       struct debug_info       debug;          /* debugging */
+};
+
+#define INIT_THREAD  { }
+
+static inline void start_thread_common(struct pt_regs *regs, unsigned long pc)
+{
+       memset(regs, 0, sizeof(*regs));
+       regs->syscallno = ~0UL;
+       regs->pc = pc;
+}
+
+static inline void start_thread(struct pt_regs *regs, unsigned long pc,
+                               unsigned long sp)
+{
+       start_thread_common(regs, pc);
+       regs->pstate = PSR_MODE_EL0t;
+       regs->sp = sp;
+}
+
+#ifdef CONFIG_COMPAT
+static inline void compat_start_thread(struct pt_regs *regs, unsigned long pc,
+                                      unsigned long sp)
+{
+       start_thread_common(regs, pc);
+       regs->pstate = COMPAT_PSR_MODE_USR;
+       if (pc & 1)
+               regs->pstate |= COMPAT_PSR_T_BIT;
+
+#ifdef __AARCH64EB__
+       regs->pstate |= COMPAT_PSR_E_BIT;
+#endif
+
+       regs->compat_sp = sp;
+}
+#endif
+
+/* Forward declaration, a strange C thing */
+struct task_struct;
+
+/* Free all resources held by a thread. */
+extern void release_thread(struct task_struct *);
+
+unsigned long get_wchan(struct task_struct *p);
+
+static inline void cpu_relax(void)
+{
+       asm volatile("yield" ::: "memory");
+}
+
+#define cpu_relax_lowlatency()                cpu_relax()
+
+/* Thread switching */
+extern struct task_struct *cpu_switch_to(struct task_struct *prev,
+                                        struct task_struct *next);
+
+#define task_pt_regs(p) \
+       ((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1)
+
+#define KSTK_EIP(tsk)  ((unsigned long)task_pt_regs(tsk)->pc)
+#define KSTK_ESP(tsk)  user_stack_pointer(task_pt_regs(tsk))
+
+/*
+ * Prefetching support
+ */
+#define ARCH_HAS_PREFETCH
+static inline void prefetch(const void *ptr)
+{
+       asm volatile("prfm pldl1keep, %a0\n" : : "p" (ptr));
+}
+
+#define ARCH_HAS_PREFETCHW
+static inline void prefetchw(const void *ptr)
+{
+       asm volatile("prfm pstl1keep, %a0\n" : : "p" (ptr));
+}
+
+#define ARCH_HAS_SPINLOCK_PREFETCH
+static inline void spin_lock_prefetch(const void *x)
+{
+       prefetchw(x);
+}
+
+#define HAVE_ARCH_PICK_MMAP_LAYOUT
+
+#endif
+
+#endif /* __ASM_PROCESSOR_H */