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author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-04-20 10:19:28 +0200 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-04-20 13:08:36 +0200 |
commit | fbcd7c8fa65eb695e96a62ea1c1ac7a024fa9dfc (patch) | |
tree | a17e285cf22cd49cd42e8b3ad562febc3987d566 /c/src/lib/libbsp/sh/gensh4 | |
parent | bsps: Move console drivers to bsps (diff) | |
download | rtems-fbcd7c8fa65eb695e96a62ea1c1ac7a024fa9dfc.tar.bz2 |
bsps: Move start files to bsps
This patch is a part of the BSP source reorganization.
Update #3285.
Diffstat (limited to 'c/src/lib/libbsp/sh/gensh4')
-rw-r--r-- | c/src/lib/libbsp/sh/gensh4/Makefile.am | 2 | ||||
-rw-r--r-- | c/src/lib/libbsp/sh/gensh4/start/start.S | 278 |
2 files changed, 1 insertions, 279 deletions
diff --git a/c/src/lib/libbsp/sh/gensh4/Makefile.am b/c/src/lib/libbsp/sh/gensh4/Makefile.am index 92a9cdf6e7..97cea6de1a 100644 --- a/c/src/lib/libbsp/sh/gensh4/Makefile.am +++ b/c/src/lib/libbsp/sh/gensh4/Makefile.am @@ -6,7 +6,7 @@ include $(top_srcdir)/../../bsp.am dist_project_lib_DATA = startup/bsp_specs -start.$(OBJEXT): start/start.S +start.$(OBJEXT): ../../../../../../bsps/sh/gensh4/start/start.S $(CPPASCOMPILE) -o $@ -c $< project_lib_DATA = start.$(OBJEXT) diff --git a/c/src/lib/libbsp/sh/gensh4/start/start.S b/c/src/lib/libbsp/sh/gensh4/start/start.S deleted file mode 100644 index a695daaf8a..0000000000 --- a/c/src/lib/libbsp/sh/gensh4/start/start.S +++ /dev/null @@ -1,278 +0,0 @@ -/* - * start.S -- Initialization code for SH7750 generic BSP - * - * Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia - * Author: Victor V. Vengerov <vvv@oktet.ru> - * - * Based on work: - * Authors: Ralf Corsepius (corsepiu@faw.uni-ulm.de) and - * Bernd Becker (becker@faw.uni-ulm.de) - * - * COPYRIGHT (c) 1997-1998, FAW Ulm, Germany - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. - * - * Modified to reflect Hitachi EDK SH7045F: - * John M. Mills (jmills@tga.com) - * TGA Technologies, Inc. - * 100 Pinnacle Way, Suite 140 - * Norcross, GA 30071 U.S.A. - * - * - * This modified file may be copied and distributed in accordance - * the above-referenced license. It is provided for critique and - * developmental purposes without any warranty nor representation - * by the authors or by TGA Technologies. - * - * COPYRIGHT (c) 1999-2001. - * On-Line Applications Research Corporation (OAR). - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#include <rtems/asm.h> -#include "rtems/score/sh4_regs.h" -#include "rtems/score/sh7750_regs.h" - - BEGIN_CODE - PUBLIC(start) - -/* - * Algorithm of the first part of the start(): - * - * 1. Initialize stack - * 2. Are we from reset or from gdb? Set value for boot_mode in r9. - * 3. Initialize hardware if we are from reset. Cache is off. - * 4. Copy data from flash to ram; set up boot mode and jump to real address. - * 5. Zero out bss. - * 6. Turn memory cach on. - */ - -SYM (start): - ! install the stack pointer - mov.l stack_k,r15 - - mov.l initial_sr_k,r0 - ldc r0,ssr - ldc r0,sr - - ! let us see if we are from gdb stub or from power-on reset - bsr fake_func - nop -fake_func: - - sts pr, r0 - shlr8 r0 - mov.l reset_pc_value_shift_8_k, r1 - cmp/eq r0, r1 - movt r9 ! r9 == ! boot_mode - neg r9, r9 - add #1, r9 ! r9 == boot_mode - - ! what is in boot_mode? - cmp/pl r9 ! r9 > 0 -> T = 1 - - ! if boot_mode != SH4_BOOT_MODE_FLASH - bt hw_init_end - nop - -#if START_HW_INIT /* from $RTEMS_BSP.cfg */ - ! Initialize minimal hardware - ! to run hw_init we need to calculate its address - ! as it is before data copying - mov.l hw_init_k, r0 - mov.l copy_start_k, r1 - mov.l copy_end_k, r2 - cmp/ge r0, r1 - bt 0f - cmp/ge r0, r2 - bf 0f - ! if copy_start <= hw_init <= copy_end then - neg r1, r1 - mov.l copy_start_in_rom_k, r3 - add r1,r0 - add r3, r0 -0: - jsr @r0 - nop !delay slot -#endif /* START_HW_INIT */ -hw_init_end: - -#if COPY_DATA_FROM_ROM - ! copy data from rom to ram - mov.l copy_start_k, r0 - mov.l copy_end_k, r1 - mov.l copy_start_in_rom_k, r2 - - ! if copy_from == copy_to do not copy anything - cmp/eq r0, r2 - bt real_address - nop - -copy_data_cycle: - cmp/ge r1, r0 - bt end_of_copy_data_cycle - nop - mov.l @r2+, r3 - mov.l r3, @r0 - add #4, r0 - bra copy_data_cycle - nop - -end_of_copy_data_cycle: -#endif - ! go to 0x8....... adresses - mov.l real_address_k, r0 - lds r0, pr - rts - nop -real_address: - ! write boot_mode to ram - mov.l boot_mode_k, r5 - mov.l r9, @r5 - -zero_bss: - ! zero out bss - mov.l __bss_start_k,r0 - mov.l __bss_end_k,r1 - mov #0,r2 -0: - mov.l r2,@r0 - add #4,r0 - cmp/ge r0,r1 - bt 0b - nop - - ! Turn cache on - mov.l cache_on_k, r0 - jsr @r0 - nop !delay slot - - ! Save old value of VBR register. We will need it to allow - ! debugger agent hook exceptions. - mov.l __VBR_Saved_k,r0 - stc vbr,r5 - mov.l r5,@r0 - ! Set up VBR register - mov.l _vbr_base_k,r0 - ldc r0,vbr - - ! initialise fpscr for gcc - mov.l set_fpscr_k, r1 - jsr @r1 - nop - - ! Set FPSCR register - mov.l initial_fpscr_k,r0 - lds r0,fpscr - - ! call the mainline - mov #0,r4 ! argc - mov.l main_k,r0 - jsr @r0 - nop - - ! call exit - mov r0,r4 - mov.l exit_k,r0 - jsr @r0 - or r0,r0 - - .global _stop -_stop: - mov #11,r0 - mov #0,r4 - trapa #0x3f - nop -__stop: - bra __stop - nop - - END_CODE - - .align 2 -#if START_HW_INIT -copy_start_k: - .long copy_start -copy_end_k: - .long copy_end -#endif -#if COPY_DATA_FROM_ROM -copy_start_in_rom_k: - .long copy_start_in_rom -#endif - -real_address_k: - .long real_address -set_fpscr_k: - .long ___set_fpscr -_vbr_base_k: - .long SYM(_vbr_base) -__VBR_Saved_k: - .long SYM(_VBR_Saved) -stack_k: - .long SYM(stack) -__bss_start_k: - .long __bss_start -__bss_end_k: - .LONG __bss_end -main_k: - .long SYM(boot_card) -exit_k: - .long SYM(_exit) - -#if START_HW_INIT /* from $RTEMS_BSP.cfg */ -hw_init_k: - .long SYM(early_hw_init) -#endif /* START_HW_INIT */ - -cache_on_k: - .long SYM(bsp_cache_on) - -vects_k: - .long SYM(vectab) -vects_size: - .word 255 - - .align 2 -initial_sr_k: - .long SH4_SR_MD | SH4_SR_IMASK -initial_fpscr_k: -#ifdef __SH4__ - .long SH4_FPSCR_DN | SH4_FPSCR_PR | SH4_FPSCR_RM -#else - .long SH4_FPSCR_DN | SH4_FPSCR_RM -#endif - -reset_pc_value_shift_8_k: - .long 0xa00000 - -boot_mode_k: - .long _boot_mode - -#ifdef __ELF__ - .section .stack,"aw" -#else - .section .stack -#endif -SYM(stack): - .long 0xdeaddead - -#ifdef __ELF__ - .section .bss,"aw" -#else - .section .bss -#endif - - .global __sh4sim_dummy_register -__sh4sim_dummy_register: - .long 0 - - .section .data - .global _boot_mode -_boot_mode: - .long 0 |