usiii/start/bspinit.S

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  *  BSP specific initialization for Sparc64 RTEMS -- sun4u BSP
0005  *
0006  *  This code defines start code specific to the sun4u BSP
0007  */
0008
0009 /*
0010  *  COPYRIGHT (c) 2010 Gedare Bloom.
0011  *
0012  * Redistribution and use in source and binary forms, with or without
0013  * modification, are permitted provided that the following conditions
0014  * are met:
0015  * 1. Redistributions of source code must retain the above copyright
0016  *    notice, this list of conditions and the following disclaimer.
0017  * 2. Redistributions in binary form must reproduce the above copyright
0018  *    notice, this list of conditions and the following disclaimer in the
0019  *    documentation and/or other materials provided with the distribution.
0020  *
0021  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0022  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0023  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0024  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0025  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0026  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0027  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0028  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0029  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0030  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0031  * POSSIBILITY OF SUCH DAMAGE.
0032  */
0033
0034 #include <rtems/asm.h>
0035 #include <rtems/score/cpu.h>
0036
0037 #include <traptable.h>
0038
0039 #define LSU_CR_IM_MASK  (0x0004)  /* bit 2 */
0040 #define LSU_CR_DM_MASK  (0x0008)  /* bit 3 */
0041
0042 #define STACK_WINDOW_SAVE_AREA_SIZE (16*8)
0043
0044 .register %g2, #scratch
0045 .register %g3, #scratch
0046
0047 .section .text
0048
0049 PUBLIC(_BSP_init)
0050 .global _BSP_init
0051   SYM(_BSP_init):
0052   save %sp, -STACK_WINDOW_SAVE_AREA_SIZE, %sp
0053
0054   ! copy the tba
0055   sethi %hi(real_trap_table), %o0
0056   rdpr  %tba, %o2
0057   stx   %o2, [%o0 + %lo(real_trap_table)]
0058
0059 !  /* copy firmware trap table so that RTEMS can install ISR handlers */
0060 !  setx  SYM(trap_table), %l0, %o0
0061 !  rdpr  %tba, %o1
0062 !  set TABLE_SIZE, %o2
0063 !  call memcpy
0064 !  nop
0065
0066   mov %g0, %o0
0067   call _take_mmu
0068   nop
0069
0070   ret
0071   restore
0072