xref: /OK3568_Linux_fs/kernel/arch/x86/boot/compressed/cmdline.c (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #include "misc.h"
3*4882a593Smuzhiyun 
4*4882a593Smuzhiyun static unsigned long fs;
set_fs(unsigned long seg)5*4882a593Smuzhiyun static inline void set_fs(unsigned long seg)
6*4882a593Smuzhiyun {
7*4882a593Smuzhiyun 	fs = seg << 4;  /* shift it back */
8*4882a593Smuzhiyun }
9*4882a593Smuzhiyun typedef unsigned long addr_t;
rdfs8(addr_t addr)10*4882a593Smuzhiyun static inline char rdfs8(addr_t addr)
11*4882a593Smuzhiyun {
12*4882a593Smuzhiyun 	return *((char *)(fs + addr));
13*4882a593Smuzhiyun }
14*4882a593Smuzhiyun #include "../cmdline.c"
get_cmd_line_ptr(void)15*4882a593Smuzhiyun unsigned long get_cmd_line_ptr(void)
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun 	unsigned long cmd_line_ptr = boot_params->hdr.cmd_line_ptr;
18*4882a593Smuzhiyun 
19*4882a593Smuzhiyun 	cmd_line_ptr |= (u64)boot_params->ext_cmd_line_ptr << 32;
20*4882a593Smuzhiyun 
21*4882a593Smuzhiyun 	return cmd_line_ptr;
22*4882a593Smuzhiyun }
cmdline_find_option(const char * option,char * buffer,int bufsize)23*4882a593Smuzhiyun int cmdline_find_option(const char *option, char *buffer, int bufsize)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun 	return __cmdline_find_option(get_cmd_line_ptr(), option, buffer, bufsize);
26*4882a593Smuzhiyun }
cmdline_find_option_bool(const char * option)27*4882a593Smuzhiyun int cmdline_find_option_bool(const char *option)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun 	return __cmdline_find_option_bool(get_cmd_line_ptr(), option);
30*4882a593Smuzhiyun }
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