| /* |
| * Copyright (c) 2018 Intel Corporation |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| #ifndef _XUK_SWITCH_H |
| #define _XUK_SWITCH_H |
| |
| /* This lives separate from the rest of the xuk API, as it has |
| * to be inlined into Zephyr code. |
| */ |
| |
| static inline void xuk_switch(void *switch_to, void **switched_from) |
| { |
| /* Constructs an IRETQ interrupt frame, the final CALL pushes |
| * the RIP to which to return |
| */ |
| __asm__ volatile("mov %%rsp, %%rcx;" |
| "pushq $0x10;" /* SS */ |
| "pushq %%rcx;" /* RSP */ |
| "pushfq;" /* RFLAGS */ |
| "pushq $0x08;" /* CS */ |
| "callq _switch_top" |
| : : "a"(switch_to), "d"(switched_from) |
| : "ecx", "memory"); |
| } |
| |
| #endif /* _XUK_SWITCH_H */ |
