arch/x86/boot/compressed/cmdline.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "misc.h"
   3
   4 #if CONFIG_EARLY_PRINTK || CONFIG_RANDOMIZE_BASE || CONFIG_X86_5LEVEL
   5
   6 static unsigned long fs;
   7 static inline void set_fs(unsigned long seg)
   8 {
   9         fs = seg << 4;  /* shift it back */
  10 }
  11 typedef unsigned long addr_t;
  12 static inline char rdfs8(addr_t addr)
  13 {
  14         return *((char *)(fs + addr));
  15 }
  16 #include "../cmdline.c"
  17 unsigned long get_cmd_line_ptr(void)
  18 {
  19         unsigned long cmd_line_ptr = boot_params->hdr.cmd_line_ptr;
  20
  21         cmd_line_ptr |= (u64)boot_params->ext_cmd_line_ptr << 32;
  22
  23         return cmd_line_ptr;
  24 }
  25 int cmdline_find_option(const char *option, char *buffer, int bufsize)
  26 {
  27         return __cmdline_find_option(get_cmd_line_ptr(), option, buffer, bufsize);
  28 }
  29 int cmdline_find_option_bool(const char *option)
  30 {
  31         return __cmdline_find_option_bool(get_cmd_line_ptr(), option);
  32 }
  33
  34 #endif