diff options
Diffstat (limited to 'arch/mips/fw/lib')
| -rw-r--r-- | arch/mips/fw/lib/Makefile | 2 | ||||
| -rw-r--r-- | arch/mips/fw/lib/call_o32.S | 2 | ||||
| -rw-r--r-- | arch/mips/fw/lib/cmdline.c | 101 |
3 files changed, 104 insertions, 1 deletions
diff --git a/arch/mips/fw/lib/Makefile b/arch/mips/fw/lib/Makefile index 84befc968fc4..529150516777 100644 --- a/arch/mips/fw/lib/Makefile +++ b/arch/mips/fw/lib/Makefile @@ -2,4 +2,6 @@ # Makefile for generic prom monitor library routines under Linux. # +lib-y += cmdline.o + lib-$(CONFIG_64BIT) += call_o32.o diff --git a/arch/mips/fw/lib/call_o32.S b/arch/mips/fw/lib/call_o32.S index e0a68713b3c3..b308b2a0613e 100644 --- a/arch/mips/fw/lib/call_o32.S +++ b/arch/mips/fw/lib/call_o32.S @@ -14,7 +14,7 @@ /* Maximum number of arguments supported. Must be even! */ #define O32_ARGC 32 -/* Number of static registers we save. */ +/* Number of static registers we save. */ #define O32_STATC 11 /* Frame size for static register */ #define O32_FRAMESZ (SZREG * O32_STATC) diff --git a/arch/mips/fw/lib/cmdline.c b/arch/mips/fw/lib/cmdline.c new file mode 100644 index 000000000000..ffd0345780ae --- /dev/null +++ b/arch/mips/fw/lib/cmdline.c @@ -0,0 +1,101 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. + */ +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/string.h> + +#include <asm/addrspace.h> +#include <asm/fw/fw.h> + +int fw_argc; +int *_fw_argv; +int *_fw_envp; + +void __init fw_init_cmdline(void) +{ + int i; + + /* Validate command line parameters. */ + if ((fw_arg0 >= CKSEG0) || (fw_arg1 < CKSEG0)) { + fw_argc = 0; + _fw_argv = NULL; + } else { + fw_argc = (fw_arg0 & 0x0000ffff); + _fw_argv = (int *)fw_arg1; + } + + /* Validate environment pointer. */ + if (fw_arg2 < CKSEG0) + _fw_envp = NULL; + else + _fw_envp = (int *)fw_arg2; + + for (i = 1; i < fw_argc; i++) { + strlcat(arcs_cmdline, fw_argv(i), COMMAND_LINE_SIZE); + if (i < (fw_argc - 1)) + strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE); + } +} + +char * __init fw_getcmdline(void) +{ + return &(arcs_cmdline[0]); +} + +char *fw_getenv(char *envname) +{ + char *result = NULL; + + if (_fw_envp != NULL) { + /* + * Return a pointer to the given environment variable. + * YAMON uses "name", "value" pairs, while U-Boot uses + * "name=value". + */ + int i, yamon, index = 0; + + yamon = (strchr(fw_envp(index), '=') == NULL); + i = strlen(envname); + + while (fw_envp(index)) { + if (strncmp(envname, fw_envp(index), i) == 0) { + if (yamon) { + result = fw_envp(index + 1); + break; + } else if (fw_envp(index)[i] == '=') { + result = (fw_envp(index + 1) + i); + break; + } + } + + /* Increment array index. */ + if (yamon) + index += 2; + else + index += 1; + } + } + + return result; +} + +unsigned long fw_getenvl(char *envname) +{ + unsigned long envl = 0UL; + char *str; + long val; + int tmp; + + str = fw_getenv(envname); + if (str) { + tmp = kstrtol(str, 0, &val); + envl = (unsigned long)val; + } + + return envl; +} |