259 lines
5.9 KiB
C
259 lines
5.9 KiB
C
/* Console Callback Routines.
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Copyright (C) 2011 Richard Henderson
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This file is part of QEMU PALcode.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the text
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of the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not see
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<http://www.gnu.org/licenses/>. */
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#include "hwrpb.h"
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#include "protos.h"
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#include "console.h"
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#include "uart.h"
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/* All routines use the high bit to signal error. */
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#define ERR 0x8000000000000000ul
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unsigned long
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crb_getc(long unit)
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{
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/* Multiple consoles not yet supported. */
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if (unit != 0)
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return ERR;
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return uart_getchar(COM1);
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}
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unsigned long
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crb_process_keycode(long unit, long keycode, long again)
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{
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/* This routine might be needed for real keyboards, and mostly for
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internationalization stuff. */
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/* Return Failure: routine not supported. */
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return 0xc000000000000000ul;
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}
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unsigned long
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crb_puts(long unit, const char *buf, unsigned long length)
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{
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unsigned int orig_length = length;
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/* Multiple consoles not yet supported. */
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if (unit != 0)
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return ERR;
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for (; length != 0; --length, ++buf)
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uart_putchar_raw(COM1, (unsigned char)*buf);
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/* Bits <31:0> of the return value are the number of bytes written.
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To me that implies that the input value must be 32-bit, but v2
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of the ARM doesn't explicitly say. */
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return orig_length;
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}
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unsigned long
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crb_reset_term(long unit)
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{
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/* Multiple consoles not yet supported. */
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if (unit != 0)
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return ERR;
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uart_init_line(COM1, 9600);
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return 0;
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}
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static unsigned long
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crb_set_term_ctl(long unit, long ctb)
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{
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/* ??? The contents of the CTB do not seem to be defined anywhere.
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How, therefore, can the user set new contents? */
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return ERR;
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}
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static unsigned long
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crb_set_term_int(long unit, long mask)
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{
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/* We do no buffering, therefore we don't need to support interrupts. */
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if (unit != 0 || (mask & 0x22) != 0)
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return ERR;
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return 0;
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}
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unsigned long
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crb_open(const char *devstr, unsigned long length)
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{
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/* FIXME */
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return ERR;
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}
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unsigned long
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crb_close(long channel)
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{
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/* FIXME */
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return 0;
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}
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static unsigned long
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crb_ioctl(long channel)
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{
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/* We do not, nor will not, support virtual tapes. */
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return ERR;
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}
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unsigned long
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crb_read(long channel, unsigned long length, char *buf, unsigned long block)
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{
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/* FIXME */
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return ERR;
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}
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unsigned long
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crb_write(long channel, unsigned long length, const char *buf,
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unsigned long block)
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{
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/* FIXME */
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return ERR;
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}
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unsigned long
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crb_get_env(unsigned long id, char *buf, unsigned long length)
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{
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/* FIXME */
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return 0xc000000000000000ul;
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}
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unsigned long
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crb_set_env(unsigned long id, const char *buf, unsigned long length)
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{
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/* FIXME */
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return 0xc000000000000000ul;
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}
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static unsigned long
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crb_reset_env(unsigned long id, char *buf, unsigned long length)
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{
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/* FIXME */
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return 0xc000000000000000ul;
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}
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static unsigned long
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crb_save_env(void)
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{
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/* FIXME */
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return 0xc000000000000000ul;
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}
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static unsigned long
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crb_pswitch(long action, long cpu_id)
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{
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/* Why would we ever need to support switching primary processor? */
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return ERR;
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}
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static unsigned long __attribute__((used))
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int_crb_dispatch(long select, long a1, long a2, long a3, long a4)
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{
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switch (select)
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{
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case CRB_GETC:
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return crb_getc(a1);
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case CRB_PUTS:
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return crb_puts(a1, (const char *)a2, a3);
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case CRB_RESET_TERM:
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return crb_reset_term(a1);
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case CRB_SET_TERM_INT:
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return crb_set_term_int(a1, a2);
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case CRB_SET_TERM_CTL:
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return crb_set_term_ctl(a1, a2);
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case CRB_PROCESS_KEYCODE:
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return crb_process_keycode(a1, a2, a3);
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case CRB_OPEN:
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return crb_open((const char*)a1, a2);
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case CRB_CLOSE:
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return crb_close(a1);
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case CRB_IOCTL:
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return crb_ioctl(a1);
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case CRB_READ:
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return crb_read(a1, a2, (char *)a3, a4);
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case CRB_WRITE:
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return crb_write(a1, a2, (const char *)a3, a4);
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case CRB_SET_ENV:
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return crb_set_env(a1, (const char *)a2, a3);
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case CRB_RESET_ENV:
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return crb_reset_env(a1, (char *)a2, a3);
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case CRB_GET_ENV:
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return crb_get_env(a1, (char *)a2, a3);
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case CRB_SAVE_ENV:
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return crb_save_env();
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case CRB_PSWITCH:
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return crb_pswitch(a1, a2);
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}
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return ERR;
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}
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static unsigned long __attribute__((used))
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int_crb_fixup(unsigned long vptptr, unsigned long hwrpb)
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{
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/* Given that this console is written to use the KSEG, and not be
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mapped into any page-table address space, it doesn't seem like
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we need to do anything at all here. */
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return 0;
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}
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/* The CRB DISPATCH and FIXUP functions are defined to use the VMS
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calling convention. This has several effects:
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(1) The set of call-saved registers is different.
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(2) $27 contains the procdesc_struct, not the called function.
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Map between the two calling conventions here. */
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asm(".macro VMStoUNIX name\n"
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" .globl \\name\n"
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" .ent \\name\n"
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"\\name:\n"
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" .frame $sp, 64, $26, 0\n"
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" subq $sp, 64, $sp\n"
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" stq $26, 0($sp)\n"
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" stq $2, 8($sp)\n"
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" stq $3, 16($sp)\n"
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" stq $4, 24($sp)\n"
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" stq $5, 32($sp)\n"
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" stq $6, 40($sp)\n"
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" stq $7, 48($sp)\n"
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" stq $8, 56($sp)\n"
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" .mask 0x40001fc, 0\n"
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" .prologue 2\n"
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" br $gp, .+4\n"
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" ldgp $gp, 0($gp)\n"
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" bsr $26, int_\\name !samegp\n"
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" ldq $26, 0($sp)\n"
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" ldq $2, 8($sp)\n"
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" ldq $3, 16($sp)\n"
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" ldq $4, 24($sp)\n"
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" ldq $5, 32($sp)\n"
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" ldq $6, 40($sp)\n"
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" ldq $7, 48($sp)\n"
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" ldq $8, 56($sp)\n"
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" addq $sp, 64, $sp\n"
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" ret\n"
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" .end \\name\n"
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".endm\n"
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" VMStoUNIX crb_dispatch\n"
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" VMStoUNIX crb_fixup\n"
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);
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