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-rw-r--r--arch/ppc/boot/simple/misc.c278
1 files changed, 0 insertions, 278 deletions
diff --git a/arch/ppc/boot/simple/misc.c b/arch/ppc/boot/simple/misc.c
deleted file mode 100644
index c3d3305eb5ca..000000000000
--- a/arch/ppc/boot/simple/misc.c
+++ /dev/null
@@ -1,278 +0,0 @@
1/*
2 * Misc. bootloader code for many machines. This assumes you have are using
3 * a 6xx/7xx/74xx CPU in your machine. This assumes the chunk of memory
4 * below 8MB is free. Finally, it assumes you have a NS16550-style uart for
5 * your serial console. If a machine meets these requirements, it can quite
6 * likely use this code during boot.
7 *
8 * Author: Matt Porter <mporter@mvista.com>
9 * Derived from arch/ppc/boot/prep/misc.c
10 *
11 * 2001 (c) MontaVista, Software, Inc. This file is licensed under
12 * the terms of the GNU General Public License version 2. This program
13 * is licensed "as is" without any warranty of any kind, whether express
14 * or implied.
15 */
16
17#include <linux/types.h>
18#include <linux/string.h>
19
20#include <asm/page.h>
21#include <asm/mmu.h>
22#include <asm/bootinfo.h>
23#ifdef CONFIG_4xx
24#include <asm/ibm4xx.h>
25#endif
26#include <asm/reg.h>
27
28#include "nonstdio.h"
29
30/* Default cmdline */
31#ifdef CONFIG_CMDLINE
32#define CMDLINE CONFIG_CMDLINE
33#else
34#define CMDLINE ""
35#endif
36
37/* Keyboard (and VGA console)? */
38#ifdef CONFIG_VGA_CONSOLE
39#define HAS_KEYB 1
40#else
41#define HAS_KEYB 0
42#endif
43
44/* Will / Can the user give input?
45 */
46#if (defined(CONFIG_SERIAL_8250_CONSOLE) \
47 || defined(CONFIG_VGA_CONSOLE) \
48 || defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
49 || defined(CONFIG_SERIAL_MPSC_CONSOLE))
50#define INTERACTIVE_CONSOLE 1
51#endif
52
53char *avail_ram;
54char *end_avail;
55char *zimage_start;
56char cmd_preset[] = CMDLINE;
57char cmd_buf[256];
58char *cmd_line = cmd_buf;
59int keyb_present = HAS_KEYB;
60int zimage_size;
61
62unsigned long com_port;
63unsigned long initrd_size = 0;
64
65/* The linker tells us various locations in the image */
66extern char __image_begin, __image_end;
67extern char __ramdisk_begin, __ramdisk_end;
68extern char _end[];
69/* Original location */
70extern unsigned long start;
71
72extern int CRT_tstc(void);
73extern unsigned long serial_init(int chan, void *ignored);
74extern void serial_close(unsigned long com_port);
75extern void gunzip(void *, int, unsigned char *, int *);
76extern void serial_fixups(void);
77
78/* Allow get_mem_size to be hooked into. This is the default. */
79unsigned long __attribute__ ((weak))
80get_mem_size(void)
81{
82 return 0;
83}
84
85#if defined(CONFIG_40x)
86#define PPC4xx_EMAC0_MR0 EMAC0_BASE
87#endif
88
89#if defined(CONFIG_44x) && defined(PPC44x_EMAC0_MR0)
90#define PPC4xx_EMAC0_MR0 PPC44x_EMAC0_MR0
91#endif
92
93struct bi_record *
94decompress_kernel(unsigned long load_addr, int num_words, unsigned long cksum)
95{
96#ifdef INTERACTIVE_CONSOLE
97 int timer = 0;
98 char ch;
99#endif
100 char *cp;
101 struct bi_record *rec;
102 unsigned long initrd_loc = 0, TotalMemory = 0;
103
104#if defined(CONFIG_SERIAL_8250_CONSOLE) || defined(CONFIG_SERIAL_MPSC_CONSOLE)
105 com_port = serial_init(0, NULL);
106#endif
107
108#if defined(PPC4xx_EMAC0_MR0)
109 /* Reset MAL */
110 mtdcr(DCRN_MALCR(DCRN_MAL_BASE), MALCR_MMSR);
111 /* Wait for reset */
112 while (mfdcr(DCRN_MALCR(DCRN_MAL_BASE)) & MALCR_MMSR) {};
113 /* Reset EMAC */
114 *(volatile unsigned long *)PPC4xx_EMAC0_MR0 = 0x20000000;
115 __asm__ __volatile__("eieio");
116#endif
117
118 /*
119 * Call get_mem_size(), which is memory controller dependent,
120 * and we must have the correct file linked in here.
121 */
122 TotalMemory = get_mem_size();
123
124 /* assume the chunk below 8M is free */
125 end_avail = (char *)0x00800000;
126
127 /*
128 * Reveal where we were loaded at and where we
129 * were relocated to.
130 */
131 puts("loaded at: "); puthex(load_addr);
132 puts(" "); puthex((unsigned long)(load_addr + (4*num_words)));
133 puts("\n");
134 if ( (unsigned long)load_addr != (unsigned long)&start )
135 {
136 puts("relocated to: "); puthex((unsigned long)&start);
137 puts(" ");
138 puthex((unsigned long)((unsigned long)&start + (4*num_words)));
139 puts("\n");
140 }
141
142 /*
143 * We link ourself to 0x00800000. When we run, we relocate
144 * ourselves there. So we just need __image_begin for the
145 * start. -- Tom
146 */
147 zimage_start = (char *)(unsigned long)(&__image_begin);
148 zimage_size = (unsigned long)(&__image_end) -
149 (unsigned long)(&__image_begin);
150
151 initrd_size = (unsigned long)(&__ramdisk_end) -
152 (unsigned long)(&__ramdisk_begin);
153
154 /*
155 * The zImage and initrd will be between start and _end, so they've
156 * already been moved once. We're good to go now. -- Tom
157 */
158 avail_ram = (char *)PAGE_ALIGN((unsigned long)_end);
159 puts("zimage at: "); puthex((unsigned long)zimage_start);
160 puts(" "); puthex((unsigned long)(zimage_size+zimage_start));
161 puts("\n");
162
163 if ( initrd_size ) {
164 puts("initrd at: ");
165 puthex((unsigned long)(&__ramdisk_begin));
166 puts(" "); puthex((unsigned long)(&__ramdisk_end));puts("\n");
167 }
168
169#ifndef CONFIG_40x /* don't overwrite the 40x image located at 0x00400000! */
170 avail_ram = (char *)0x00400000;
171#endif
172 end_avail = (char *)0x00800000;
173 puts("avail ram: "); puthex((unsigned long)avail_ram); puts(" ");
174 puthex((unsigned long)end_avail); puts("\n");
175
176 if (keyb_present)
177 CRT_tstc(); /* Forces keyboard to be initialized */
178
179 /* Display standard Linux/PPC boot prompt for kernel args */
180 puts("\nLinux/PPC load: ");
181 cp = cmd_line;
182 memcpy (cmd_line, cmd_preset, sizeof(cmd_preset));
183 while ( *cp ) putc(*cp++);
184
185#ifdef INTERACTIVE_CONSOLE
186 /*
187 * If they have a console, allow them to edit the command line.
188 * Otherwise, don't bother wasting the five seconds.
189 */
190 while (timer++ < 5*1000) {
191 if (tstc()) {
192 while ((ch = getc()) != '\n' && ch != '\r') {
193 /* Test for backspace/delete */
194 if (ch == '\b' || ch == '\177') {
195 if (cp != cmd_line) {
196 cp--;
197 puts("\b \b");
198 }
199 /* Test for ^x/^u (and wipe the line) */
200 } else if (ch == '\030' || ch == '\025') {
201 while (cp != cmd_line) {
202 cp--;
203 puts("\b \b");
204 }
205 } else {
206 *cp++ = ch;
207 putc(ch);
208 }
209 }
210 break; /* Exit 'timer' loop */
211 }
212 udelay(1000); /* 1 msec */
213 }
214 *cp = 0;
215#endif
216 puts("\n");
217
218 puts("Uncompressing Linux...");
219 gunzip(NULL, 0x400000, zimage_start, &zimage_size);
220 puts("done.\n");
221
222 /* get the bi_rec address */
223 rec = bootinfo_addr(zimage_size);
224
225 /* We need to make sure that the initrd and bi_recs do not
226 * overlap. */
227 if ( initrd_size ) {
228 unsigned long rec_loc = (unsigned long) rec;
229 initrd_loc = (unsigned long)(&__ramdisk_begin);
230 /* If the bi_recs are in the middle of the current
231 * initrd, move the initrd to the next MB
232 * boundary. */
233 if ((rec_loc > initrd_loc) &&
234 ((initrd_loc + initrd_size) > rec_loc)) {
235 initrd_loc = _ALIGN((unsigned long)(zimage_size)
236 + (2 << 20) - 1, (2 << 20));
237 memmove((void *)initrd_loc, &__ramdisk_begin,
238 initrd_size);
239 puts("initrd moved: "); puthex(initrd_loc);
240 puts(" "); puthex(initrd_loc + initrd_size);
241 puts("\n");
242 }
243 }
244
245 bootinfo_init(rec);
246 if ( TotalMemory )
247 bootinfo_append(BI_MEMSIZE, sizeof(int), (void*)&TotalMemory);
248
249 bootinfo_append(BI_CMD_LINE, strlen(cmd_line)+1, (void*)cmd_line);
250
251 /* add a bi_rec for the initrd if it exists */
252 if (initrd_size) {
253 unsigned long initrd[2];
254
255 initrd[0] = initrd_loc;
256 initrd[1] = initrd_size;
257
258 bootinfo_append(BI_INITRD, sizeof(initrd), &initrd);
259 }
260 puts("Now booting the kernel\n");
261 serial_close(com_port);
262
263 return rec;
264}
265
266void __attribute__ ((weak))
267board_isa_init(void)
268{
269}
270
271/* Allow decompress_kernel to be hooked into. This is the default. */
272void * __attribute__ ((weak))
273load_kernel(unsigned long load_addr, int num_words, unsigned long cksum,
274 void *ign1, void *ign2)
275{
276 board_isa_init();
277 return decompress_kernel(load_addr, num_words, cksum);
278}
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