/* * * BRIEF MODULE DESCRIPTION * PROM library initialisation code, supports YAMON and U-Boot. * * Copyright 2000, 2001, 2006 MontaVista Software Inc. * Author: MontaVista Software, Inc. * ppopov@mvista.com or source@mvista.com * * This file was derived from Carsten Langgaard's * arch/mips/mips-boards/xx files. * * Carsten Langgaard, carstenl@mips.com * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/string.h> #include <asm/bootinfo.h> #include <asm/mach-jz4740/regs.h> /* #define DEBUG_CMDLINE */ int prom_argc; char **prom_argv, **prom_envp; char *prom_getcmdline(void) { return &(arcs_cmdline[0]); } void prom_init_cmdline(void) { char *cp, *c; size_t i = 1; cp = &(arcs_cmdline[0]); while(i < prom_argc) { c = prom_argv[i]; while (*c) { *cp++ = *c++; } *cp++ = ' '; i++; } if (i > 1) { *(cp - 1) = '\0'; } } void __init prom_init(void) { unsigned long memsize; prom_argc = (int) fw_arg0; prom_argv = (char **) fw_arg1; prom_envp = (char **) fw_arg2; mips_machtype = MACH_INGENIC_JZ4740; prom_init_cmdline(); memsize = 0x04000000; add_memory_region(0, memsize, BOOT_MEM_RAM); } void __init prom_free_prom_memory(void) { } /* used by early printk */ void prom_putchar(char c) { volatile u8 *uart_lsr = (volatile u8 *)(UART0_BASE + OFF_LSR); volatile u8 *uart_tdr = (volatile u8 *)(UART0_BASE + OFF_TDR); /* Wait for fifo to shift out some bytes */ while ( !((*uart_lsr & (UARTLSR_TDRQ | UARTLSR_TEMT)) == 0x60) ); *uart_tdr = (u8)c; } const char *get_system_type(void) { return "JZ4740"; } EXPORT_SYMBOL(prom_getcmdline);