Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 2 | /* |
| 3 | * arch/arm/mach-rpc/include/mach/uncompress.h |
| 4 | * |
| 5 | * Copyright (C) 1996 Russell King |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 6 | */ |
| 7 | #define VIDMEM ((char *)SCREEN_START) |
| 8 | |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 9 | #include <linux/io.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 10 | #include <mach/hardware.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 11 | #include <asm/setup.h> |
| 12 | #include <asm/page.h> |
| 13 | |
| 14 | int video_size_row; |
| 15 | unsigned char bytes_per_char_h; |
| 16 | extern unsigned long con_charconvtable[256]; |
| 17 | |
| 18 | struct param_struct { |
| 19 | unsigned long page_size; |
| 20 | unsigned long nr_pages; |
| 21 | unsigned long ramdisk_size; |
| 22 | unsigned long mountrootrdonly; |
| 23 | unsigned long rootdev; |
| 24 | unsigned long video_num_cols; |
| 25 | unsigned long video_num_rows; |
| 26 | unsigned long video_x; |
| 27 | unsigned long video_y; |
| 28 | unsigned long memc_control_reg; |
| 29 | unsigned char sounddefault; |
| 30 | unsigned char adfsdrives; |
| 31 | unsigned char bytes_per_char_h; |
| 32 | unsigned char bytes_per_char_v; |
| 33 | unsigned long unused[256/4-11]; |
| 34 | }; |
| 35 | |
| 36 | static const unsigned long palette_4[16] = { |
| 37 | 0x00000000, |
| 38 | 0x000000cc, |
| 39 | 0x0000cc00, /* Green */ |
| 40 | 0x0000cccc, /* Yellow */ |
| 41 | 0x00cc0000, /* Blue */ |
| 42 | 0x00cc00cc, /* Magenta */ |
| 43 | 0x00cccc00, /* Cyan */ |
| 44 | 0x00cccccc, /* White */ |
| 45 | 0x00000000, |
| 46 | 0x000000ff, |
| 47 | 0x0000ff00, |
| 48 | 0x0000ffff, |
| 49 | 0x00ff0000, |
| 50 | 0x00ff00ff, |
| 51 | 0x00ffff00, |
| 52 | 0x00ffffff |
| 53 | }; |
| 54 | |
| 55 | #define palette_setpixel(p) *(unsigned long *)(IO_START+0x00400000) = 0x10000000|((p) & 255) |
| 56 | #define palette_write(v) *(unsigned long *)(IO_START+0x00400000) = 0x00000000|((v) & 0x00ffffff) |
| 57 | |
| 58 | /* |
| 59 | * params_phys is a linker defined symbol - see |
| 60 | * arch/arm/boot/compressed/Makefile |
| 61 | */ |
| 62 | extern __attribute__((pure)) struct param_struct *params(void); |
| 63 | #define params (params()) |
| 64 | |
| 65 | #ifndef STANDALONE_DEBUG |
Nicolas Pitre | 8ea0de4 | 2011-04-28 17:00:17 -0400 | [diff] [blame] | 66 | unsigned long video_num_cols; |
| 67 | unsigned long video_num_rows; |
| 68 | unsigned long video_x; |
| 69 | unsigned long video_y; |
| 70 | unsigned char bytes_per_char_v; |
| 71 | int white; |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 72 | |
| 73 | /* |
| 74 | * This does not append a newline |
| 75 | */ |
Arnd Bergmann | 4d2b7d4 | 2016-02-18 17:36:23 +0100 | [diff] [blame] | 76 | static inline void putc(int c) |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 77 | { |
| 78 | extern void ll_write_char(char *, char c, char white); |
| 79 | int x,y; |
| 80 | char *ptr; |
| 81 | |
| 82 | x = video_x; |
| 83 | y = video_y; |
| 84 | |
| 85 | if (c == '\n') { |
| 86 | if (++y >= video_num_rows) |
| 87 | y--; |
| 88 | } else if (c == '\r') { |
| 89 | x = 0; |
| 90 | } else { |
| 91 | ptr = VIDMEM + ((y*video_num_cols*bytes_per_char_v+x)*bytes_per_char_h); |
| 92 | ll_write_char(ptr, c, white); |
| 93 | if (++x >= video_num_cols) { |
| 94 | x = 0; |
| 95 | if ( ++y >= video_num_rows ) { |
| 96 | y--; |
| 97 | } |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | video_x = x; |
| 102 | video_y = y; |
| 103 | } |
| 104 | |
| 105 | static inline void flush(void) |
| 106 | { |
| 107 | } |
| 108 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 109 | /* |
| 110 | * Setup for decompression |
| 111 | */ |
| 112 | static void arch_decomp_setup(void) |
| 113 | { |
| 114 | int i; |
| 115 | struct tag *t = (struct tag *)params; |
| 116 | unsigned int nr_pages = 0, page_size = PAGE_SIZE; |
| 117 | |
| 118 | if (t->hdr.tag == ATAG_CORE) |
| 119 | { |
| 120 | for (; t->hdr.size; t = tag_next(t)) |
| 121 | { |
| 122 | if (t->hdr.tag == ATAG_VIDEOTEXT) |
| 123 | { |
| 124 | video_num_rows = t->u.videotext.video_lines; |
| 125 | video_num_cols = t->u.videotext.video_cols; |
| 126 | bytes_per_char_h = t->u.videotext.video_points; |
| 127 | bytes_per_char_v = t->u.videotext.video_points; |
| 128 | video_x = t->u.videotext.x; |
| 129 | video_y = t->u.videotext.y; |
| 130 | } |
| 131 | |
| 132 | if (t->hdr.tag == ATAG_MEM) |
| 133 | { |
| 134 | page_size = PAGE_SIZE; |
| 135 | nr_pages += (t->u.mem.size / PAGE_SIZE); |
| 136 | } |
| 137 | } |
| 138 | } |
| 139 | else |
| 140 | { |
| 141 | nr_pages = params->nr_pages; |
| 142 | page_size = params->page_size; |
| 143 | video_num_rows = params->video_num_rows; |
| 144 | video_num_cols = params->video_num_cols; |
| 145 | video_x = params->video_x; |
| 146 | video_y = params->video_y; |
| 147 | bytes_per_char_h = params->bytes_per_char_h; |
| 148 | bytes_per_char_v = params->bytes_per_char_v; |
| 149 | } |
| 150 | |
| 151 | video_size_row = video_num_cols * bytes_per_char_h; |
| 152 | |
| 153 | if (bytes_per_char_h == 4) |
| 154 | for (i = 0; i < 256; i++) |
| 155 | con_charconvtable[i] = |
| 156 | (i & 128 ? 1 << 0 : 0) | |
| 157 | (i & 64 ? 1 << 4 : 0) | |
| 158 | (i & 32 ? 1 << 8 : 0) | |
| 159 | (i & 16 ? 1 << 12 : 0) | |
| 160 | (i & 8 ? 1 << 16 : 0) | |
| 161 | (i & 4 ? 1 << 20 : 0) | |
| 162 | (i & 2 ? 1 << 24 : 0) | |
| 163 | (i & 1 ? 1 << 28 : 0); |
| 164 | else |
| 165 | for (i = 0; i < 16; i++) |
| 166 | con_charconvtable[i] = |
| 167 | (i & 8 ? 1 << 0 : 0) | |
| 168 | (i & 4 ? 1 << 8 : 0) | |
| 169 | (i & 2 ? 1 << 16 : 0) | |
| 170 | (i & 1 ? 1 << 24 : 0); |
| 171 | |
| 172 | |
| 173 | palette_setpixel(0); |
| 174 | if (bytes_per_char_h == 1) { |
| 175 | palette_write (0); |
| 176 | palette_write (0x00ffffff); |
| 177 | for (i = 2; i < 256; i++) |
| 178 | palette_write (0); |
| 179 | white = 1; |
| 180 | } else { |
| 181 | for (i = 0; i < 256; i++) |
| 182 | palette_write (i < 16 ? palette_4[i] : 0); |
| 183 | white = 7; |
| 184 | } |
| 185 | |
| 186 | if (nr_pages * page_size < 4096*1024) error("<4M of mem\n"); |
| 187 | } |
| 188 | #endif |