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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_SCORE_PROCESSOR_H
#define _ASM_SCORE_PROCESSOR_H
#include <linux/cpumask.h>
#include <linux/threads.h>
#include <asm/segment.h>
struct task_struct;
/*
* System setup and hardware flags..
*/
extern void (*cpu_wait)(void);
extern void start_thread(struct pt_regs *regs,
unsigned long pc, unsigned long sp);
extern unsigned long get_wchan(struct task_struct *p);
/*
* Return current * instruction pointer ("program counter").
*/
#define current_text_addr() ({ __label__ _l; _l: &&_l; })
#define cpu_relax() barrier()
#define release_thread(thread) do {} while (0)
/*
* User space process size: 2GB. This is hardcoded into a few places,
* so don't change it unless you know what you are doing.
*/
#define TASK_SIZE 0x7fff8000UL
/*
* This decides where the kernel will search for a free chunk of vm
* space during mmap's.
*/
#define TASK_UNMAPPED_BASE ((TASK_SIZE / 3) & ~(PAGE_SIZE))
#ifdef __KERNEL__
#define STACK_TOP TASK_SIZE
#define STACK_TOP_MAX TASK_SIZE
#endif
/*
* If you change thread_struct remember to change the #defines below too!
*/
struct thread_struct {
unsigned long reg0, reg2, reg3;
unsigned long reg12, reg13, reg14, reg15, reg16;
unsigned long reg17, reg18, reg19, reg20, reg21;
unsigned long cp0_psr;
unsigned long cp0_ema; /* Last user fault */
unsigned long cp0_badvaddr; /* Last user fault */
unsigned long cp0_baduaddr; /* Last kernel fault accessing USEG */
unsigned long error_code;
unsigned long trap_no;
unsigned long mflags;
unsigned long reg29;
unsigned long single_step;
unsigned long ss_nextcnt;
unsigned long insn1_type;
unsigned long addr1;
unsigned long insn1;
unsigned long insn2_type;
unsigned long addr2;
unsigned long insn2;
mm_segment_t current_ds;
};
#define INIT_THREAD { \
.reg0 = 0, \
.reg2 = 0, \
.reg3 = 0, \
.reg12 = 0, \
.reg13 = 0, \
.reg14 = 0, \
.reg15 = 0, \
.reg16 = 0, \
.reg17 = 0, \
.reg18 = 0, \
.reg19 = 0, \
.reg20 = 0, \
.reg21 = 0, \
.cp0_psr = 0, \
.error_code = 0, \
.trap_no = 0, \
}
#define kstk_tos(tsk) \
((unsigned long)task_stack_page(tsk) + THREAD_SIZE - 32)
#define task_pt_regs(tsk) ((struct pt_regs *)kstk_tos(tsk) - 1)
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->cp0_epc)
#define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[29])
#endif /* _ASM_SCORE_PROCESSOR_H */
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