diff options
Diffstat (limited to 'nuttx/arch/dm320/src/up_restart.S')
| -rw-r--r-- | nuttx/arch/dm320/src/up_restart.S | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/nuttx/arch/dm320/src/up_restart.S b/nuttx/arch/dm320/src/up_restart.S deleted file mode 100644 index ed1ecde5b..000000000 --- a/nuttx/arch/dm320/src/up_restart.S +++ /dev/null @@ -1,136 +0,0 @@ -/******************************************************************** - * up_head.S - * - * Copyright (C) 2007 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <spudmonkey@racsa.co.cr> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * 3. Neither the name Gregory Nutt nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ********************************************************************/ - -/******************************************************************** - * Included Files - ********************************************************************/ - -#include <nuttx/config.h> -#include "up_internal.h" -#include "dm320.h" - -/******************************************************************** - * Definitions - ********************************************************************/ - -/******************************************************************** - * Assembly Macros - ********************************************************************/ - -/* Since the page table is closely related to the NuttX base - * address, we can convert the page table base address to the - * base address of the section containing both. - */ - - .macro mksection, section, pgtable - bic \section, \pgtable, #0x000ff000 - .endm - -/************************************************************************** - * Name: up_restart - **************************************************************************/ - - .text - .globl up_restart - .type up_restart, %function -up_restart: - /* Make sure that we are in SVC mode with all IRQs disabled */ - - mov r0, #(SVC_MODE | PSR_I_BIT | PSR_F_BIT) - msr cpsr_c, r0 - - /* Create identity mapping for first MB section to support - * this re-start logic executing out of the physical address - * space. - */ - - mksection r0, r4 /* r0=phys. base section */ - ldr r1, .LCmmuflags /* FLGS=MMU_MEMFLAGS */ - add r3, r1, r0 /* r3=flags + base */ - str r3, [r4, r0, lsr #18] /* identity mapping */ - - /* Jump into the physical address space */ - - ldr pc, .LCphysrestart - nop - nop - - /* We are now executing at our physical address, with the - * MMU disabled. - */ - -up_phyrestart: - - mov r0, #0 - mcr p15, 0, r0, c7, c7 /* Invalidate I,D caches */ - mcr p15, 0, r0, c7, c10, 4 /* Drain write buffer */ - mcr p15, 0, r0, c8, c7 /* Invalidate I,D TLBs */ - - /* Clear bits in control register (see start.h): Disable, - * MMU, Data cache, alignment traps, write buffer, Instruction - * cache, exceptions at 0xffff0000, round robin) - */ - - mrc p15, 0, r0, c1, c0 /* Get control register */ - bic r0, r0, #(CR_M|CR_C|CR_A|CR_W) - bic r0, r0, #(CR_S|CR_I|CR_V|CR_RR) - mcr p15, 0, r0, c1, c0, 0 /* Write control reg */ - - /* We know that the the bootloader entry point is at the - * beginning of flash. - */ -#if 1 - ldr pc, .LCbtldrentry /* Restart bootloader */ -#else - b __start /* Restart Nuttx */ -#endif - - .type .LCphysrestart, %object -.LCphysrestart: - .long (up_phyrestart - DM320_SDRAM_VADDR + DM320_SDRAM_PADDR) -.LCbtldrentry: - .long DM320_EXT_MEM_PADDR - -/************************************************************************** - * PC_Relative Data - **************************************************************************/ - - .type .LCmmuflags, %object -.LCmmuflags: - .long MMU_MEMFLAGS - .size up_restart, .-up_restart - - .end - |