/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _ASM_POWERPC_SYSCALLS_32_H
#define _ASM_POWERPC_SYSCALLS_32_H

#include <linux/compat.h>
#include <asm/siginfo.h>
#include <asm/signal.h>

/*
 * Data types and macros for providing 32b PowerPC support.
 */

/* These are here to support 32-bit syscalls on a 64-bit kernel. */

struct pt_regs32 {
    unsigned int gpr[32];
    unsigned int nip;
    unsigned int msr;
    unsigned int orig_gpr3;        /* Used for restarting system calls */
    unsigned int ctr;
    unsigned int link;
    unsigned int xer;
    unsigned int ccr;
    unsigned int mq;        /* 601 only (not used at present) */
    unsigned int trap;        /* Reason for being here */
    unsigned int dar;        /* Fault registers */
    unsigned int dsisr;
    unsigned int result;        /* Result of a system call */
};

struct sigcontext32 {
    unsigned int    _unused[4];
    int        signal;
    compat_uptr_t    handler;
    unsigned int    oldmask;
    compat_uptr_t    regs;  /* 4 byte pointer to the pt_regs32 structure. */
};

struct mcontext32 {
    elf_gregset_t32        mc_gregs;
    elf_fpregset_t        mc_fregs;
    unsigned int        mc_pad[2];
    elf_vrregset_t32    mc_vregs __attribute__((__aligned__(16)));
    elf_vsrreghalf_t32      mc_vsregs __attribute__((__aligned__(16)));
};

struct ucontext32 { 
    unsigned int          uc_flags;
    unsigned int           uc_link;
    compat_stack_t         uc_stack;
    int             uc_pad[7];
    compat_uptr_t        uc_regs;    /* points to uc_mcontext field */
    compat_sigset_t         uc_sigmask;    /* mask last for extensibility */
    /* glibc has 1024-bit signal masks, ours are 64-bit */
    int             uc_maskext[30];
    int             uc_pad2[3];
    struct mcontext32    uc_mcontext;
};

#endif  // _ASM_POWERPC_SYSCALLS_32_H