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/* SPDX-License-Identifier: GPL-2.0 */
/*
* linux/arch/nds32/include/asm/setup.h
*
* Copyright (C) 1997-1999 Russell King
* Copyright (C) 2008 Andes Technology Corporation
* Copyright (C) 2013 Ken Kuo (ken_kuo@andestech.com)
* Copyright (C) 2017 Rick Chen (rick@andestech.com)
*
* Structure passed to kernel to tell it about the
* hardware it's running on. See Documentation/arm/Setup
* for more info.
*/
#ifndef __RISCV_SETUP_H
#define __RISCV_SETUP_H
#define COMMAND_LINE_SIZE 256
/* The list ends with an ATAG_NONE node. */
#define ATAG_NONE 0x00000000
struct tag_header {
u32 size;
u32 tag;
};
/* The list must start with an ATAG_CORE node */
#define ATAG_CORE 0x54410001
struct tag_core {
u32 flags; /* bit 0 = read-only */
u32 pagesize;
u32 rootdev;
};
/* it is allowed to have multiple ATAG_MEM nodes */
#define ATAG_MEM 0x54410002
struct tag_mem32 {
u32 size;
u32 start; /* physical start address */
};
/* VGA text type displays */
#define ATAG_VIDEOTEXT 0x54410003
struct tag_videotext {
u8 x;
u8 y;
u16 video_page;
u8 video_mode;
u8 video_cols;
u16 video_ega_bx;
u8 video_lines;
u8 video_isvga;
u16 video_points;
};
/* describes how the ramdisk will be used in kernel */
#define ATAG_RAMDISK 0x54410004
struct tag_ramdisk {
u32 flags; /* bit 0 = load, bit 1 = prompt */
u32 size; /* decompressed ramdisk size in _kilo_ bytes */
u32 start; /* starting block of floppy-based RAM disk image */
};
/*
* this one accidentally used virtual addresses - as such,
* it's deprecated.
* describes where the compressed ramdisk image lives (virtual address)
*/
#define ATAG_INITRD 0x54410005
/* describes where the compressed ramdisk image lives (physical address) */
#define ATAG_INITRD2 0x54420005
struct tag_initrd {
u32 start; /* physical start address */
u32 size; /* size of compressed ramdisk image in bytes */
};
/* board serial number. "64 bits should be enough for everybody" */
#define ATAG_SERIAL 0x54410006
struct tag_serialnr {
u32 low;
u32 high;
};
/* board revision */
#define ATAG_REVISION 0x54410007
struct tag_revision {
u32 rev;
};
/* initial values for vesafb-type framebuffers. see struct screen_info
* in include/linux/tty.h
*/
#define ATAG_VIDEOLFB 0x54410008
struct tag_videolfb {
u16 lfb_width;
u16 lfb_height;
u16 lfb_depth;
u16 lfb_linelength;
u32 lfb_base;
u32 lfb_size;
u8 red_size;
u8 red_pos;
u8 green_size;
u8 green_pos;
u8 blue_size;
u8 blue_pos;
u8 rsvd_size;
u8 rsvd_pos;
};
/* command line: \0 terminated string */
#define ATAG_CMDLINE 0x54410009
struct tag_cmdline {
char cmdline[COMMAND_LINE_SIZE];
};
struct tag {
struct tag_header hdr;
union {
struct tag_core core;
struct tag_mem32 mem;
struct tag_videotext videotext;
struct tag_ramdisk ramdisk;
struct tag_initrd initrd;
struct tag_serialnr serialnr;
struct tag_revision revision;
struct tag_videolfb videolfb;
struct tag_cmdline cmdline;
} u;
};
struct tagtable {
u32 tag;
int (*parse)(const struct tag *);
};
#define tag_member_present(_tag, member) \
typeof(_tag) (tag) = (_tag); \
((unsigned long)(&((struct tag *)0L)->member + 1) \
<= (tag)->hdr.size * 4)
#define tag_next(_t) \
typeof(_t) (t) = (_t); \
((struct tag *)((u32 *)(t) + (t)->hdr.size))
#define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
#define for_each_tag(_t, base) \
typeof(_t) (t) = (_t); \
for (t = base; t->hdr.size; t = tag_next(t))
#ifdef __KERNEL__
#define __tag __used __attribute__((__section__(".taglist")))
#define __tagtable(tag, fn) \
static struct tagtable __tagtable_##fn __tag = { tag, fn }
/*
* Memory map description
*/
#define NR_BANKS 8
struct meminfo {
int nr_banks;
struct {
unsigned long start;
unsigned long size;
int node;
} bank[NR_BANKS];
};
/*
* Early command line parameters.
*/
struct early_params {
const char *arg;
void (*fn)(char **p);
};
#define __early_param(name, fn) \
static struct early_params __early_##fn __used \
__attribute__((__section__("__early_param"))) = { name, fn }
#endif
#endif
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