| 1 | /* |
| 2 | * ARM AArch64 thread support for bsd-user. |
| 3 | * |
| 4 | * Copyright (c) 2015 Stacey D. Son |
| 5 | * |
| 6 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 7 | */ |
| 8 | #ifndef TARGET_ARCH_THREAD_H |
| 9 | #define TARGET_ARCH_THREAD_H |
| 10 | |
| 11 | /* Compare to arm64/arm64/vm_machdep.c cpu_set_upcall_kse() */ |
| 12 | static inline void target_thread_set_upcall(CPUARMState *regs, abi_ulong entry, |
| 13 | abi_ulong arg, abi_ulong stack_base, abi_ulong stack_size) |
| 14 | { |
| 15 | abi_ulong sp; |
| 16 | |
| 17 | /* |
| 18 | * Make sure the stack is properly aligned. |
| 19 | * arm64/include/param.h (STACKLIGN() macro) |
| 20 | */ |
| 21 | sp = ROUND_DOWN(stack_base + stack_size, 16); |
| 22 | |
| 23 | /* sp = stack base */ |
| 24 | regs->xregs[31] = sp; |
| 25 | /* pc = start function entry */ |
| 26 | regs->pc = entry; |
| 27 | /* r0 = arg */ |
| 28 | regs->xregs[0] = arg; |
| 29 | |
| 30 | |
| 31 | } |
| 32 | |
| 33 | static inline void target_thread_init(struct target_pt_regs *regs, |
| 34 | struct image_info *infop) |
| 35 | { |
| 36 | abi_long stack = infop->start_stack; |
| 37 | |
| 38 | /* |
| 39 | * Make sure the stack is properly aligned. |
| 40 | * arm64/include/param.h (STACKLIGN() macro) |
| 41 | */ |
| 42 | |
| 43 | memset(regs, 0, sizeof(*regs)); |
| 44 | regs->regs[0] = infop->start_stack; |
| 45 | regs->pc = infop->entry; |
| 46 | regs->sp = ROUND_DOWN(stack, 16); |
| 47 | } |
| 48 | |
| 49 | #endif /* TARGET_ARCH_THREAD_H */ |