android_kernel_xiaomi_sm8350/include/asm-arm/arch-rpc/uncompress.h
Alan Hourihane e16edefe65 [ARM] 4564/1: Add tagged list support for Acorn RiscPC's uncompress code
arch_decomp_setup() does not understand the new tagged lists
for parameter setup. It's fixed in using the older param struct.

This patch adds support for tagged lists and allows the older
param struct too.

Signed-off-by: Alan Hourihane <alanh@fairlite.demon.co.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-10-12 23:43:11 +01:00

199 lines
4.4 KiB
C

/*
* linux/include/asm-arm/arch-rpc/uncompress.h
*
* Copyright (C) 1996 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.
*/
#define VIDMEM ((char *)SCREEN_START)
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/setup.h>
#include <asm/page.h>
int video_size_row;
unsigned char bytes_per_char_h;
extern unsigned long con_charconvtable[256];
struct param_struct {
unsigned long page_size;
unsigned long nr_pages;
unsigned long ramdisk_size;
unsigned long mountrootrdonly;
unsigned long rootdev;
unsigned long video_num_cols;
unsigned long video_num_rows;
unsigned long video_x;
unsigned long video_y;
unsigned long memc_control_reg;
unsigned char sounddefault;
unsigned char adfsdrives;
unsigned char bytes_per_char_h;
unsigned char bytes_per_char_v;
unsigned long unused[256/4-11];
};
static const unsigned long palette_4[16] = {
0x00000000,
0x000000cc,
0x0000cc00, /* Green */
0x0000cccc, /* Yellow */
0x00cc0000, /* Blue */
0x00cc00cc, /* Magenta */
0x00cccc00, /* Cyan */
0x00cccccc, /* White */
0x00000000,
0x000000ff,
0x0000ff00,
0x0000ffff,
0x00ff0000,
0x00ff00ff,
0x00ffff00,
0x00ffffff
};
#define palette_setpixel(p) *(unsigned long *)(IO_START+0x00400000) = 0x10000000|((p) & 255)
#define palette_write(v) *(unsigned long *)(IO_START+0x00400000) = 0x00000000|((v) & 0x00ffffff)
/*
* params_phys is a linker defined symbol - see
* arch/arm/boot/compressed/Makefile
*/
extern __attribute__((pure)) struct param_struct *params(void);
#define params (params())
#ifndef STANDALONE_DEBUG
static unsigned long video_num_cols;
static unsigned long video_num_rows;
static unsigned long video_x;
static unsigned long video_y;
static unsigned char bytes_per_char_v;
static int white;
/*
* This does not append a newline
*/
static void putc(int c)
{
extern void ll_write_char(char *, char c, char white);
int x,y;
char *ptr;
x = video_x;
y = video_y;
if (c == '\n') {
if (++y >= video_num_rows)
y--;
} else if (c == '\r') {
x = 0;
} else {
ptr = VIDMEM + ((y*video_num_cols*bytes_per_char_v+x)*bytes_per_char_h);
ll_write_char(ptr, c, white);
if (++x >= video_num_cols) {
x = 0;
if ( ++y >= video_num_rows ) {
y--;
}
}
}
video_x = x;
video_y = y;
}
static inline void flush(void)
{
}
static void error(char *x);
/*
* Setup for decompression
*/
static void arch_decomp_setup(void)
{
int i;
struct tag *t = (struct tag *)params;
unsigned int nr_pages = 0, page_size = PAGE_SIZE;
if (t->hdr.tag == ATAG_CORE)
{
for (; t->hdr.size; t = tag_next(t))
{
if (t->hdr.tag == ATAG_VIDEOTEXT)
{
video_num_rows = t->u.videotext.video_lines;
video_num_cols = t->u.videotext.video_cols;
bytes_per_char_h = t->u.videotext.video_points;
bytes_per_char_v = t->u.videotext.video_points;
video_x = t->u.videotext.x;
video_y = t->u.videotext.y;
}
if (t->hdr.tag == ATAG_MEM)
{
page_size = PAGE_SIZE;
nr_pages += (t->u.mem.size / PAGE_SIZE);
}
}
}
else
{
nr_pages = params->nr_pages;
page_size = params->page_size;
video_num_rows = params->video_num_rows;
video_num_cols = params->video_num_cols;
video_x = params->video_x;
video_y = params->video_y;
bytes_per_char_h = params->bytes_per_char_h;
bytes_per_char_v = params->bytes_per_char_v;
}
video_size_row = video_num_cols * bytes_per_char_h;
if (bytes_per_char_h == 4)
for (i = 0; i < 256; i++)
con_charconvtable[i] =
(i & 128 ? 1 << 0 : 0) |
(i & 64 ? 1 << 4 : 0) |
(i & 32 ? 1 << 8 : 0) |
(i & 16 ? 1 << 12 : 0) |
(i & 8 ? 1 << 16 : 0) |
(i & 4 ? 1 << 20 : 0) |
(i & 2 ? 1 << 24 : 0) |
(i & 1 ? 1 << 28 : 0);
else
for (i = 0; i < 16; i++)
con_charconvtable[i] =
(i & 8 ? 1 << 0 : 0) |
(i & 4 ? 1 << 8 : 0) |
(i & 2 ? 1 << 16 : 0) |
(i & 1 ? 1 << 24 : 0);
palette_setpixel(0);
if (bytes_per_char_h == 1) {
palette_write (0);
palette_write (0x00ffffff);
for (i = 2; i < 256; i++)
palette_write (0);
white = 1;
} else {
for (i = 0; i < 256; i++)
palette_write (i < 16 ? palette_4[i] : 0);
white = 7;
}
if (nr_pages * page_size < 4096*1024) error("<4M of mem\n");
}
#endif
/*
* nothing to do
*/
#define arch_decomp_wdog()