| /* SPDX-License-Identifier: GPL-2.0 */ | |
| /* | |
| * Definitions used by low-level trap handlers | |
| * | |
| * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> | |
| * Copyright (C) 2007-2009 PetaLogix | |
| * Copyright (C) 2007 John Williams <john.williams@petalogix.com> | |
| */ | |
| #ifndef _ASM_MICROBLAZE_ENTRY_H | |
| #define _ASM_MICROBLAZE_ENTRY_H | |
| #include <asm/percpu.h> | |
| #include <asm/ptrace.h> | |
| #include <linux/linkage.h> | |
| /* | |
| * These are per-cpu variables required in entry.S, among other | |
| * places | |
| */ | |
| #define PER_CPU(var) var | |
| /* | |
| * The MicroBlaze ABI has the caller reserve an argument home area: | |
| * REG_PARM_STACK_SPACE is 24 and OUTGOING_REG_PARM_STACK_SPACE is 1, so a | |
| * callee may write to [caller_sp + 4, caller_sp + 28). The kernel calls C | |
| * with r1 at the frame base, so reserve that area below pt_regs and reach | |
| * the saved registers through PTO. This restores what 6e83557c38b4 | |
| * ("microblaze: Remove r0_ram pointer and PTO alignment") removed; the old | |
| * value of 24 was one word short and left the last argument slot | |
| * overlapping pt_regs' r0. | |
| */ | |
| #define PTO 28 | |
| #define STATE_SAVE_SIZE (PT_SIZE + PTO) | |
| # ifndef __ASSEMBLER__ | |
| DECLARE_PER_CPU(unsigned int, KSP); /* Saved kernel stack pointer */ | |
| DECLARE_PER_CPU(unsigned int, KM); /* Kernel/user mode */ | |
| DECLARE_PER_CPU(unsigned int, ENTRY_SP); /* Saved SP on kernel entry */ | |
| DECLARE_PER_CPU(unsigned int, R11_SAVE); /* Temp variable for entry */ | |
| DECLARE_PER_CPU(unsigned int, CURRENT_SAVE); /* Saved current pointer */ | |
| extern asmlinkage void do_notify_resume(struct pt_regs *regs, int in_syscall); | |
| # endif /* __ASSEMBLER__ */ | |
| #endif /* _ASM_MICROBLAZE_ENTRY_H */ |