129 строки
2.4 KiB
C
129 строки
2.4 KiB
C
/*
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*
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* Per Hallsmark, per.hallsmark@mvista.com
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*
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* Based on jmr3927/common/prom.c
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*
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* 2004 (c) MontaVista Software, Inc. This file is licensed under the
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* terms of the GNU General Public License version 2. This program is
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* licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/serial_pnx8xxx.h>
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#include <asm/bootinfo.h>
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#include <uart.h>
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/* #define DEBUG_CMDLINE */
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extern int prom_argc;
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extern char **prom_argv, **prom_envp;
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typedef struct
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{
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char *name;
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/* char *val; */
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}t_env_var;
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char * __init prom_getcmdline(void)
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{
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return &(arcs_cmdline[0]);
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}
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void __init prom_init_cmdline(void)
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{
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int i;
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arcs_cmdline[0] = '\0';
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for (i = 0; i < prom_argc; i++) {
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strcat(arcs_cmdline, prom_argv[i]);
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strcat(arcs_cmdline, " ");
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}
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}
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char *prom_getenv(char *envname)
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{
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/*
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* Return a pointer to the given environment variable.
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* Environment variables are stored in the form of "memsize=64".
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*/
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t_env_var *env = (t_env_var *)prom_envp;
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int i;
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i = strlen(envname);
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while(env->name) {
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if(strncmp(envname, env->name, i) == 0) {
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return(env->name + strlen(envname) + 1);
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}
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env++;
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}
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return(NULL);
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}
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inline unsigned char str2hexnum(unsigned char c)
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{
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if(c >= '0' && c <= '9')
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return c - '0';
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if(c >= 'a' && c <= 'f')
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return c - 'a' + 10;
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if(c >= 'A' && c <= 'F')
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return c - 'A' + 10;
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return 0; /* foo */
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}
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inline void str2eaddr(unsigned char *ea, unsigned char *str)
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{
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int i;
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for(i = 0; i < 6; i++) {
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unsigned char num;
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if((*str == '.') || (*str == ':'))
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str++;
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num = str2hexnum(*str++) << 4;
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num |= (str2hexnum(*str++));
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ea[i] = num;
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}
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}
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int get_ethernet_addr(char *ethernet_addr)
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{
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char *ethaddr_str;
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ethaddr_str = prom_getenv("ethaddr");
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if (!ethaddr_str) {
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printk("ethaddr not set in boot prom\n");
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return -1;
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}
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str2eaddr(ethernet_addr, ethaddr_str);
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return 0;
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}
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void __init prom_free_prom_memory(void)
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{
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}
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extern int pnx8550_console_port;
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/* used by early printk */
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void prom_putchar(char c)
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{
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if (pnx8550_console_port != -1) {
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/* Wait until FIFO not full */
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while( ((ip3106_fifo(UART_BASE, pnx8550_console_port) & PNX8XXX_UART_FIFO_TXFIFO) >> 16) >= 16)
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;
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/* Send one char */
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ip3106_fifo(UART_BASE, pnx8550_console_port) = c;
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}
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}
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EXPORT_SYMBOL(get_ethernet_addr);
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EXPORT_SYMBOL(str2eaddr);
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