/* * * 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/jzsoc.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; int actr; actr = 1; /* Always ignore argv[0] */ cp = &(arcs_cmdline[0]); while(actr < prom_argc) { strcpy(cp, prom_argv[actr]); cp += strlen(prom_argv[actr]); *cp++ = ' '; actr++; } if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */ --cp; if (prom_argc > 1) *cp = '\0'; } char *prom_getenv(char *envname) { #if 0 /* * Return a pointer to the given environment variable. * YAMON uses "name", "value" pairs, while U-Boot uses "name=value". */ char **env = prom_envp; int i = strlen(envname); int yamon = (*env && strchr(*env, '=') == NULL); while (*env) { if (yamon) { if (strcmp(envname, *env++) == 0) return *env; } else { if (strncmp(envname, *env, i) == 0 && (*env)[i] == '=') return *env + i + 1; } env++; } #endif return NULL; } inline unsigned char str2hexnum(unsigned char c) { if(c >= '0' && c <= '9') return c - '0'; if(c >= 'a' && c <= 'f') return c - 'a' + 10; if(c >= 'A' && c <= 'F') return c - 'A' + 10; return 0; /* foo */ } inline void str2eaddr(unsigned char *ea, unsigned char *str) { int i; for(i = 0; i < 6; i++) { unsigned char num; if((*str == '.') || (*str == ':')) str++; num = str2hexnum(*str++) << 4; num |= (str2hexnum(*str++)); ea[i] = num; } } int get_ethernet_addr(char *ethernet_addr) { char *ethaddr_str; ethaddr_str = prom_getenv("ethaddr"); if (!ethaddr_str) { printk("ethaddr not set in boot prom\n"); return -1; } str2eaddr(ethernet_addr, ethaddr_str); #if 0 { int i; printk("get_ethernet_addr: "); for (i=0; i<5; i++) printk("%02x:", (unsigned char)*(ethernet_addr+i)); printk("%02x\n", *(ethernet_addr+i)); } #endif return 0; } void __init prom_free_prom_memory(void) { } void __init prom_init(void) { unsigned char *memsize_str; unsigned long memsize; prom_argc = (int) fw_arg0; prom_argv = (char **) fw_arg1; prom_envp = (char **) fw_arg2; mips_machtype = MACH_INGENIC_JZ4730; prom_init_cmdline(); memsize_str = prom_getenv("memsize"); if (!memsize_str) { memsize = 0x04000000; } else { memsize = simple_strtol(memsize_str, NULL, 0); } add_memory_region(0, memsize, BOOT_MEM_RAM); } /* used by early printk */ void prom_putchar(char c) { volatile u8 *uart_lsr = (volatile u8 *)(UART3_BASE + OFF_LSR); volatile u8 *uart_tdr = (volatile u8 *)(UART3_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 "JZ4730"; } EXPORT_SYMBOL(prom_getcmdline); EXPORT_SYMBOL(get_ethernet_addr); EXPORT_SYMBOL(str2eaddr);