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/* SPDX-License-Identifier: GPL-2.0 / / include/asm/processor.h * * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu) / #ifndef __ASM_SPARC_PROCESSOR_H #define __ASM_SPARC_PROCESSOR_H #include <asm/psr.h> #include <asm/ptrace.h> #include <asm/head.h> #include <asm/signal.h> #include <asm/page.h> / Whee, this is STACK_TOP + PAGE_SIZE and the lowest kernel address too... * That one page is used to protect kernel from intruders, so that * we can make our access_ok test faster / #define TASK_SIZE PAGE_OFFSET #ifdef __KERNEL__ #define STACK_TOP (PAGE_OFFSET - PAGE_SIZE) #define STACK_TOP_MAX STACK_TOP #endif / __KERNEL__ / struct task_struct; #ifdef __KERNEL__ struct fpq { unsigned long insn_addr; unsigned long insn; }; #endif typedef struct { int seg; } mm_segment_t; /* The Sparc processor specific thread struct. / struct thread_struct { struct pt_regs kregs; unsigned int _pad1; /* Special child fork kpsr/kwim values. / unsigned long fork_kpsr __attribute__ ((aligned (8))); unsigned long fork_kwim; / Floating point regs / unsigned long float_regs[32] __attribute__ ((aligned (8))); unsigned long fsr; unsigned long fpqdepth; struct fpq fpqueue[16]; unsigned long flags; mm_segment_t current_ds; }; #define SPARC_FLAG_KTHREAD 0x1 / task is a kernel thread / #define SPARC_FLAG_UNALIGNED 0x2 / is allowed to do unaligned accesses / #define INIT_THREAD { \ .flags = SPARC_FLAG_KTHREAD, \ .current_ds = KERNEL_DS, \ } / Do necessary setup to start up a newly executed thread. / static inline void start_thread(struct pt_regs regs, unsigned long pc, unsigned long sp) { register unsigned long zero asm("g1"); regs->psr = (regs->psr & (PSR_CWP)) \| PSR_S; regs->pc = ((pc & (~3)) - 4); regs->npc = regs->pc + 4; regs->y = 0; zero = 0; __asm__ __volatile__("std\t%%g0, [%0 + %3 + 0x00]\n\t" "std\t%%g0, [%0 + %3 + 0x08]\n\t" "std\t%%g0, [%0 + %3 + 0x10]\n\t" "std\t%%g0, [%0 + %3 + 0x18]\n\t" "std\t%%g0, [%0 + %3 + 0x20]\n\t" "std\t%%g0, [%0 + %3 + 0x28]\n\t" "std\t%%g0, [%0 + %3 + 0x30]\n\t" "st\t%1, [%0 + %3 + 0x38]\n\t" "st\t%%g0, [%0 + %3 + 0x3c]" : /* no outputs / : "r" (regs), "r" (sp - sizeof(struct reg_window32)), "r" (zero), "i" ((const unsigned long)(&((struct pt_regs )0)->u_regs[0])) : "memory"); } /* Free all resources held by a thread. / #define release_thread(tsk) do { } while(0) unsigned long get_wchan(struct task_struct ); #define task_pt_regs(tsk) ((tsk)->thread.kregs) #define KSTK_EIP(tsk) ((tsk)->thread.kregs->pc) #define KSTK_ESP(tsk) ((tsk)->thread.kregs->u_regs[UREG_FP]) #ifdef __KERNEL__ extern struct task_struct last_task_used_math; int do_mathemu(struct pt_regs regs, struct task_struct fpt); #define cpu_relax() barrier() extern void (sparc_idle)(void); #endif #endif /* __ASM_SPARC_PROCESSOR_H */

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