diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/boot/cmdline.c')
-rw-r--r-- | ANDROID_3.4.5/arch/x86/boot/cmdline.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/ANDROID_3.4.5/arch/x86/boot/cmdline.c b/ANDROID_3.4.5/arch/x86/boot/cmdline.c deleted file mode 100644 index 6b3b6f70..00000000 --- a/ANDROID_3.4.5/arch/x86/boot/cmdline.c +++ /dev/null @@ -1,158 +0,0 @@ -/* -*- linux-c -*- ------------------------------------------------------- * - * - * Copyright (C) 1991, 1992 Linus Torvalds - * Copyright 2007 rPath, Inc. - All Rights Reserved - * - * This file is part of the Linux kernel, and is made available under - * the terms of the GNU General Public License version 2. - * - * ----------------------------------------------------------------------- */ - -/* - * Simple command-line parser for early boot. - */ - -#include "boot.h" - -static inline int myisspace(u8 c) -{ - return c <= ' '; /* Close enough approximation */ -} - -/* - * Find a non-boolean option, that is, "option=argument". In accordance - * with standard Linux practice, if this option is repeated, this returns - * the last instance on the command line. - * - * Returns the length of the argument (regardless of if it was - * truncated to fit in the buffer), or -1 on not found. - */ -int __cmdline_find_option(u32 cmdline_ptr, const char *option, char *buffer, int bufsize) -{ - addr_t cptr; - char c; - int len = -1; - const char *opptr = NULL; - char *bufptr = buffer; - enum { - st_wordstart, /* Start of word/after whitespace */ - st_wordcmp, /* Comparing this word */ - st_wordskip, /* Miscompare, skip */ - st_bufcpy /* Copying this to buffer */ - } state = st_wordstart; - - if (!cmdline_ptr || cmdline_ptr >= 0x100000) - return -1; /* No command line, or inaccessible */ - - cptr = cmdline_ptr & 0xf; - set_fs(cmdline_ptr >> 4); - - while (cptr < 0x10000 && (c = rdfs8(cptr++))) { - switch (state) { - case st_wordstart: - if (myisspace(c)) - break; - - /* else */ - state = st_wordcmp; - opptr = option; - /* fall through */ - - case st_wordcmp: - if (c == '=' && !*opptr) { - len = 0; - bufptr = buffer; - state = st_bufcpy; - } else if (myisspace(c)) { - state = st_wordstart; - } else if (c != *opptr++) { - state = st_wordskip; - } - break; - - case st_wordskip: - if (myisspace(c)) - state = st_wordstart; - break; - - case st_bufcpy: - if (myisspace(c)) { - state = st_wordstart; - } else { - if (len < bufsize-1) - *bufptr++ = c; - len++; - } - break; - } - } - - if (bufsize) - *bufptr = '\0'; - - return len; -} - -/* - * Find a boolean option (like quiet,noapic,nosmp....) - * - * Returns the position of that option (starts counting with 1) - * or 0 on not found - */ -int __cmdline_find_option_bool(u32 cmdline_ptr, const char *option) -{ - addr_t cptr; - char c; - int pos = 0, wstart = 0; - const char *opptr = NULL; - enum { - st_wordstart, /* Start of word/after whitespace */ - st_wordcmp, /* Comparing this word */ - st_wordskip, /* Miscompare, skip */ - } state = st_wordstart; - - if (!cmdline_ptr || cmdline_ptr >= 0x100000) - return -1; /* No command line, or inaccessible */ - - cptr = cmdline_ptr & 0xf; - set_fs(cmdline_ptr >> 4); - - while (cptr < 0x10000) { - c = rdfs8(cptr++); - pos++; - - switch (state) { - case st_wordstart: - if (!c) - return 0; - else if (myisspace(c)) - break; - - state = st_wordcmp; - opptr = option; - wstart = pos; - /* fall through */ - - case st_wordcmp: - if (!*opptr) - if (!c || myisspace(c)) - return wstart; - else - state = st_wordskip; - else if (!c) - return 0; - else if (c != *opptr++) - state = st_wordskip; - break; - - case st_wordskip: - if (!c) - return 0; - else if (myisspace(c)) - state = st_wordstart; - break; - } - } - - return 0; /* Buffer overrun */ -} |