mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
de0d22e50c
Prefer _THIS_IP_ defined in linux/kernel.h. Most definitions of current_text_addr were the same as _THIS_IP_, but a few archs had inline assembly instead. This patch removes the final call site of current_text_addr, making all of the definitions dead code. [akpm@linux-foundation.org: fix arch/csky/include/asm/processor.h] Link: http://lkml.kernel.org/r/20180911182413.180715-1-ndesaulniers@google.com Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
|
|
|
|
#ifndef __ASM_CSKY_PROCESSOR_H
|
|
#define __ASM_CSKY_PROCESSOR_H
|
|
|
|
#include <linux/bitops.h>
|
|
#include <asm/segment.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/current.h>
|
|
#include <asm/cache.h>
|
|
#include <abi/reg_ops.h>
|
|
#include <abi/regdef.h>
|
|
#ifdef CONFIG_CPU_HAS_FPU
|
|
#include <abi/fpu.h>
|
|
#endif
|
|
|
|
struct cpuinfo_csky {
|
|
unsigned long udelay_val;
|
|
unsigned long asid_cache;
|
|
/*
|
|
* Capability and feature descriptor structure for CSKY CPU
|
|
*/
|
|
unsigned long options;
|
|
unsigned int processor_id[4];
|
|
unsigned int fpu_id;
|
|
} __aligned(SMP_CACHE_BYTES);
|
|
|
|
extern struct cpuinfo_csky cpu_data[];
|
|
|
|
/*
|
|
* User space process size: 2GB. This is hardcoded into a few places,
|
|
* so don't change it unless you know what you are doing. TASK_SIZE
|
|
* for a 64 bit kernel expandable to 8192EB, of which the current CSKY
|
|
* implementations will "only" be able to use 1TB ...
|
|
*/
|
|
#define TASK_SIZE 0x7fff8000UL
|
|
|
|
#ifdef __KERNEL__
|
|
#define STACK_TOP TASK_SIZE
|
|
#define STACK_TOP_MAX STACK_TOP
|
|
#endif
|
|
|
|
/* This decides where the kernel will search for a free chunk of vm
|
|
* space during mmap's.
|
|
*/
|
|
#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
|
|
|
|
struct thread_struct {
|
|
unsigned long ksp; /* kernel stack pointer */
|
|
unsigned long sr; /* saved status register */
|
|
unsigned long esp0; /* points to SR of stack frame */
|
|
unsigned long hi;
|
|
unsigned long lo;
|
|
|
|
/* Other stuff associated with the thread. */
|
|
unsigned long address; /* Last user fault */
|
|
unsigned long error_code;
|
|
|
|
/* FPU regs */
|
|
struct user_fp __aligned(16) user_fp;
|
|
};
|
|
|
|
#define INIT_THREAD { \
|
|
.ksp = (unsigned long) init_thread_union.stack + THREAD_SIZE, \
|
|
.sr = DEFAULT_PSR_VALUE, \
|
|
}
|
|
|
|
/*
|
|
* Do necessary setup to start up a newly executed thread.
|
|
*
|
|
* pass the data segment into user programs if it exists,
|
|
* it can't hurt anything as far as I can tell
|
|
*/
|
|
#define start_thread(_regs, _pc, _usp) \
|
|
do { \
|
|
set_fs(USER_DS); /* reads from user space */ \
|
|
(_regs)->pc = (_pc); \
|
|
(_regs)->regs[1] = 0; /* ABIV1 is R7, uClibc_main rtdl arg */ \
|
|
(_regs)->regs[2] = 0; \
|
|
(_regs)->regs[3] = 0; /* ABIV2 is R7, use it? */ \
|
|
(_regs)->sr &= ~PS_S; \
|
|
(_regs)->usp = (_usp); \
|
|
} while (0)
|
|
|
|
/* Forward declaration, a strange C thing */
|
|
struct task_struct;
|
|
|
|
/* Free all resources held by a thread. */
|
|
static inline void release_thread(struct task_struct *dead_task)
|
|
{
|
|
}
|
|
|
|
/* Prepare to copy thread state - unlazy all lazy status */
|
|
#define prepare_to_copy(tsk) do { } while (0)
|
|
|
|
extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
|
|
|
|
#define copy_segments(tsk, mm) do { } while (0)
|
|
#define release_segments(mm) do { } while (0)
|
|
#define forget_segments() do { } while (0)
|
|
|
|
extern unsigned long thread_saved_pc(struct task_struct *tsk);
|
|
|
|
unsigned long get_wchan(struct task_struct *p);
|
|
|
|
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)
|
|
#define KSTK_ESP(tsk) (task_pt_regs(tsk)->usp)
|
|
|
|
#define task_pt_regs(p) \
|
|
((struct pt_regs *)(THREAD_SIZE + p->stack) - 1)
|
|
|
|
#define cpu_relax() barrier()
|
|
|
|
#endif /* __ASM_CSKY_PROCESSOR_H */
|