163 lines
4.0 KiB
C
163 lines
4.0 KiB
C
/*
|
|
* 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/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 */
|
|
|
|
#define ARCH_LOW_ADDRESS_LIMIT PHYS_MASK
|
|
#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 */
|
|
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;
|
|
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 *);
|
|
|
|
/* Prepare to copy thread state - unlazy all lazy status */
|
|
#define prepare_to_copy(tsk) do { } while (0)
|
|
|
|
unsigned long get_wchan(struct task_struct *p);
|
|
|
|
#define cpu_relax() barrier()
|
|
|
|
/* 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) task_pt_regs(tsk)->pc
|
|
#define KSTK_ESP(tsk) task_pt_regs(tsk)->sp
|
|
|
|
/*
|
|
* 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 */
|