bsd-user/riscv/target_arch_thread.h

   1 /*
   2  *  RISC-V thread support
   3  *
   4  *  Copyright (c) 2019 Mark Corbin
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef TARGET_ARCH_THREAD_H
  21 #define TARGET_ARCH_THREAD_H
  22
  23 /* Compare with cpu_set_upcall() in riscv/riscv/vm_machdep.c */
  24 static inline void target_thread_set_upcall(CPURISCVState *regs,
  25     abi_ulong entry, abi_ulong arg, abi_ulong stack_base,
  26     abi_ulong stack_size)
  27 {
  28     abi_ulong sp;
  29
  30     sp = ROUND_DOWN(stack_base + stack_size, 16);
  31
  32     regs->gpr[xSP] = sp;
  33     regs->pc = entry;
  34     regs->gpr[xA0] = arg;
  35 }
  36
  37 /* Compare with exec_setregs() in riscv/riscv/machdep.c */
  38 static inline void target_thread_init(struct target_pt_regs *regs,
  39     struct image_info *infop)
  40 {
  41     regs->sepc = infop->entry;
  42     regs->regs[xRA] = infop->entry;
  43     regs->regs[xA0] = infop->start_stack;
  44     regs->regs[xSP] = ROUND_DOWN(infop->start_stack, 16);
  45 }
  46
  47 #endif /* TARGET_ARCH_THREAD_H */