include/linux/initrd.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002
0003 #ifndef __LINUX_INITRD_H
0004 #define __LINUX_INITRD_H
0005
0006 #define INITRD_MINOR 250 /* shouldn't collide with /dev/ram* too soon ... */
0007
0008 /* starting block # of image */
0009 extern int rd_image_start;
0010
0011 /* size of a single RAM disk */
0012 extern unsigned long rd_size;
0013
0014 /* 1 if it is not an error if initrd_start < memory_start */
0015 extern int initrd_below_start_ok;
0016
0017 /* free_initrd_mem always gets called with the next two as arguments.. */
0018 extern unsigned long initrd_start, initrd_end;
0019 extern void free_initrd_mem(unsigned long, unsigned long);
0020
0021 #ifdef CONFIG_BLK_DEV_INITRD
0022 extern void __init reserve_initrd_mem(void);
0023 extern void wait_for_initramfs(void);
0024 #else
0025 static inline void __init reserve_initrd_mem(void) {}
0026 static inline void wait_for_initramfs(void) {}
0027 #endif
0028
0029 extern phys_addr_t phys_initrd_start;
0030 extern unsigned long phys_initrd_size;
0031
0032 extern char __initramfs_start[];
0033 extern unsigned long __initramfs_size;
0034
0035 void console_on_rootfs(void);
0036
0037 #endif /* __LINUX_INITRD_H */