1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
225 lines
6.6 KiB
C
225 lines
6.6 KiB
C
/*
|
|
* linux/arch/arm/kernel/compat.c
|
|
*
|
|
* Copyright (C) 2001 Russell King
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* We keep the old params compatibility cruft in one place (here)
|
|
* so we don't end up with lots of mess around other places.
|
|
*
|
|
* NOTE:
|
|
* The old struct param_struct is deprecated, but it will be kept in
|
|
* the kernel for 5 years from now (2001). This will allow boot loaders
|
|
* to convert to the new struct tag way.
|
|
*/
|
|
#include <linux/config.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/string.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/setup.h>
|
|
#include <asm/mach-types.h>
|
|
#include <asm/page.h>
|
|
|
|
#include <asm/mach/arch.h>
|
|
|
|
/*
|
|
* Usage:
|
|
* - do not go blindly adding fields, add them at the end
|
|
* - when adding fields, don't rely on the address until
|
|
* a patch from me has been released
|
|
* - unused fields should be zero (for future expansion)
|
|
* - this structure is relatively short-lived - only
|
|
* guaranteed to contain useful data in setup_arch()
|
|
*
|
|
* This is the old deprecated way to pass parameters to the kernel
|
|
*/
|
|
struct param_struct {
|
|
union {
|
|
struct {
|
|
unsigned long page_size; /* 0 */
|
|
unsigned long nr_pages; /* 4 */
|
|
unsigned long ramdisk_size; /* 8 */
|
|
unsigned long flags; /* 12 */
|
|
#define FLAG_READONLY 1
|
|
#define FLAG_RDLOAD 4
|
|
#define FLAG_RDPROMPT 8
|
|
unsigned long rootdev; /* 16 */
|
|
unsigned long video_num_cols; /* 20 */
|
|
unsigned long video_num_rows; /* 24 */
|
|
unsigned long video_x; /* 28 */
|
|
unsigned long video_y; /* 32 */
|
|
unsigned long memc_control_reg; /* 36 */
|
|
unsigned char sounddefault; /* 40 */
|
|
unsigned char adfsdrives; /* 41 */
|
|
unsigned char bytes_per_char_h; /* 42 */
|
|
unsigned char bytes_per_char_v; /* 43 */
|
|
unsigned long pages_in_bank[4]; /* 44 */
|
|
unsigned long pages_in_vram; /* 60 */
|
|
unsigned long initrd_start; /* 64 */
|
|
unsigned long initrd_size; /* 68 */
|
|
unsigned long rd_start; /* 72 */
|
|
unsigned long system_rev; /* 76 */
|
|
unsigned long system_serial_low; /* 80 */
|
|
unsigned long system_serial_high; /* 84 */
|
|
unsigned long mem_fclk_21285; /* 88 */
|
|
} s;
|
|
char unused[256];
|
|
} u1;
|
|
union {
|
|
char paths[8][128];
|
|
struct {
|
|
unsigned long magic;
|
|
char n[1024 - sizeof(unsigned long)];
|
|
} s;
|
|
} u2;
|
|
char commandline[COMMAND_LINE_SIZE];
|
|
};
|
|
|
|
static struct tag * __init memtag(struct tag *tag, unsigned long start, unsigned long size)
|
|
{
|
|
tag = tag_next(tag);
|
|
tag->hdr.tag = ATAG_MEM;
|
|
tag->hdr.size = tag_size(tag_mem32);
|
|
tag->u.mem.size = size;
|
|
tag->u.mem.start = start;
|
|
|
|
return tag;
|
|
}
|
|
|
|
static void __init build_tag_list(struct param_struct *params, void *taglist)
|
|
{
|
|
struct tag *tag = taglist;
|
|
|
|
if (params->u1.s.page_size != PAGE_SIZE) {
|
|
printk(KERN_WARNING "Warning: bad configuration page, "
|
|
"trying to continue\n");
|
|
return;
|
|
}
|
|
|
|
printk(KERN_DEBUG "Converting old-style param struct to taglist\n");
|
|
|
|
#ifdef CONFIG_ARCH_NETWINDER
|
|
if (params->u1.s.nr_pages != 0x02000 &&
|
|
params->u1.s.nr_pages != 0x04000 &&
|
|
params->u1.s.nr_pages != 0x08000 &&
|
|
params->u1.s.nr_pages != 0x10000) {
|
|
printk(KERN_WARNING "Warning: bad NeTTrom parameters "
|
|
"detected, using defaults\n");
|
|
|
|
params->u1.s.nr_pages = 0x1000; /* 16MB */
|
|
params->u1.s.ramdisk_size = 0;
|
|
params->u1.s.flags = FLAG_READONLY;
|
|
params->u1.s.initrd_start = 0;
|
|
params->u1.s.initrd_size = 0;
|
|
params->u1.s.rd_start = 0;
|
|
}
|
|
#endif
|
|
|
|
tag->hdr.tag = ATAG_CORE;
|
|
tag->hdr.size = tag_size(tag_core);
|
|
tag->u.core.flags = params->u1.s.flags & FLAG_READONLY;
|
|
tag->u.core.pagesize = params->u1.s.page_size;
|
|
tag->u.core.rootdev = params->u1.s.rootdev;
|
|
|
|
tag = tag_next(tag);
|
|
tag->hdr.tag = ATAG_RAMDISK;
|
|
tag->hdr.size = tag_size(tag_ramdisk);
|
|
tag->u.ramdisk.flags = (params->u1.s.flags & FLAG_RDLOAD ? 1 : 0) |
|
|
(params->u1.s.flags & FLAG_RDPROMPT ? 2 : 0);
|
|
tag->u.ramdisk.size = params->u1.s.ramdisk_size;
|
|
tag->u.ramdisk.start = params->u1.s.rd_start;
|
|
|
|
tag = tag_next(tag);
|
|
tag->hdr.tag = ATAG_INITRD;
|
|
tag->hdr.size = tag_size(tag_initrd);
|
|
tag->u.initrd.start = params->u1.s.initrd_start;
|
|
tag->u.initrd.size = params->u1.s.initrd_size;
|
|
|
|
tag = tag_next(tag);
|
|
tag->hdr.tag = ATAG_SERIAL;
|
|
tag->hdr.size = tag_size(tag_serialnr);
|
|
tag->u.serialnr.low = params->u1.s.system_serial_low;
|
|
tag->u.serialnr.high = params->u1.s.system_serial_high;
|
|
|
|
tag = tag_next(tag);
|
|
tag->hdr.tag = ATAG_REVISION;
|
|
tag->hdr.size = tag_size(tag_revision);
|
|
tag->u.revision.rev = params->u1.s.system_rev;
|
|
|
|
#ifdef CONFIG_ARCH_ACORN
|
|
if (machine_is_riscpc()) {
|
|
int i;
|
|
for (i = 0; i < 4; i++)
|
|
tag = memtag(tag, PHYS_OFFSET + (i << 26),
|
|
params->u1.s.pages_in_bank[i] * PAGE_SIZE);
|
|
} else
|
|
#endif
|
|
tag = memtag(tag, PHYS_OFFSET, params->u1.s.nr_pages * PAGE_SIZE);
|
|
|
|
#ifdef CONFIG_FOOTBRIDGE
|
|
if (params->u1.s.mem_fclk_21285) {
|
|
tag = tag_next(tag);
|
|
tag->hdr.tag = ATAG_MEMCLK;
|
|
tag->hdr.size = tag_size(tag_memclk);
|
|
tag->u.memclk.fmemclk = params->u1.s.mem_fclk_21285;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARCH_EBSA285
|
|
if (machine_is_ebsa285()) {
|
|
tag = tag_next(tag);
|
|
tag->hdr.tag = ATAG_VIDEOTEXT;
|
|
tag->hdr.size = tag_size(tag_videotext);
|
|
tag->u.videotext.x = params->u1.s.video_x;
|
|
tag->u.videotext.y = params->u1.s.video_y;
|
|
tag->u.videotext.video_page = 0;
|
|
tag->u.videotext.video_mode = 0;
|
|
tag->u.videotext.video_cols = params->u1.s.video_num_cols;
|
|
tag->u.videotext.video_ega_bx = 0;
|
|
tag->u.videotext.video_lines = params->u1.s.video_num_rows;
|
|
tag->u.videotext.video_isvga = 1;
|
|
tag->u.videotext.video_points = 8;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARCH_ACORN
|
|
tag = tag_next(tag);
|
|
tag->hdr.tag = ATAG_ACORN;
|
|
tag->hdr.size = tag_size(tag_acorn);
|
|
tag->u.acorn.memc_control_reg = params->u1.s.memc_control_reg;
|
|
tag->u.acorn.vram_pages = params->u1.s.pages_in_vram;
|
|
tag->u.acorn.sounddefault = params->u1.s.sounddefault;
|
|
tag->u.acorn.adfsdrives = params->u1.s.adfsdrives;
|
|
#endif
|
|
|
|
tag = tag_next(tag);
|
|
tag->hdr.tag = ATAG_CMDLINE;
|
|
tag->hdr.size = (strlen(params->commandline) + 3 +
|
|
sizeof(struct tag_header)) >> 2;
|
|
strcpy(tag->u.cmdline.cmdline, params->commandline);
|
|
|
|
tag = tag_next(tag);
|
|
tag->hdr.tag = ATAG_NONE;
|
|
tag->hdr.size = 0;
|
|
|
|
memmove(params, taglist, ((int)tag) - ((int)taglist) +
|
|
sizeof(struct tag_header));
|
|
}
|
|
|
|
void __init convert_to_tag_list(struct tag *tags)
|
|
{
|
|
struct param_struct *params = (struct param_struct *)tags;
|
|
build_tag_list(params, ¶ms->u2);
|
|
}
|
|
|
|
void __init squash_mem_tags(struct tag *tag)
|
|
{
|
|
for (; tag->hdr.size; tag = tag_next(tag))
|
|
if (tag->hdr.tag == ATAG_MEM)
|
|
tag->hdr.tag = ATAG_NONE;
|
|
}
|