summaryrefslogtreecommitdiff
path: root/arch/powerpc/lib/bootm.c
blob: 17c5ed173cb229db521adb8259c637d624d959ad (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
/*
 * (C) Copyright 2008 Semihalf
 *
 * (C) Copyright 2000-2006
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */


#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <image.h>
#include <malloc.h>
#include <u-boot/zlib.h>
#include <bzlib.h>
#include <environment.h>
#include <asm/byteorder.h>
#include <asm/mp.h>

#if defined(CONFIG_OF_LIBFDT)
#include <libfdt.h>
#include <fdt_support.h>
#endif

#ifdef CONFIG_SYS_INIT_RAM_LOCK
#include <asm/cache.h>
#endif

DECLARE_GLOBAL_DATA_PTR;

static ulong get_sp (void);
extern void ft_fixup_num_cores(void *blob);
static void set_clocks_in_mhz (bd_t *kbd);

#ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE
#define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE	(768*1024*1024)
#endif

int arch_fixup_fdt(void *blob)
{
	return 0;
}

static void boot_jump_linux(bootm_headers_t *images)
{
	void	(*kernel)(bd_t *, ulong r4, ulong r5, ulong r6,
			  ulong r7, ulong r8, ulong r9);
#ifdef CONFIG_OF_LIBFDT
	char *of_flat_tree = images->ft_addr;
#endif

	kernel = (void (*)(bd_t *, ulong, ulong, ulong,
			   ulong, ulong, ulong))images->ep;
	debug ("## Transferring control to Linux (at address %08lx) ...\n",
		(ulong)kernel);

	bootstage_mark(BOOTSTAGE_ID_RUN_OS);

#ifdef CONFIG_BOOTSTAGE_FDT
	bootstage_fdt_add_report();
#endif
#ifdef CONFIG_BOOTSTAGE_REPORT
	bootstage_report();
#endif

#if defined(CONFIG_SYS_INIT_RAM_LOCK) && !defined(CONFIG_E500)
	unlock_ram_in_cache();
#endif

#if defined(CONFIG_OF_LIBFDT)
	if (of_flat_tree) {	/* device tree; boot new style */
		/*
		 * Linux Kernel Parameters (passing device tree):
		 *   r3: pointer to the fdt
		 *   r4: 0
		 *   r5: 0
		 *   r6: epapr magic
		 *   r7: size of IMA in bytes
		 *   r8: 0
		 *   r9: 0
		 */
		debug ("   Booting using OF flat tree...\n");
		WATCHDOG_RESET ();
		(*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
			   getenv_bootm_mapsize(), 0, 0);
		/* does not return */
	} else
#endif
	{
		/*
		 * Linux Kernel Parameters (passing board info data):
		 *   r3: ptr to board info data
		 *   r4: initrd_start or 0 if no initrd
		 *   r5: initrd_end - unused if r4 is 0
		 *   r6: Start of command line string
		 *   r7: End   of command line string
		 *   r8: 0
		 *   r9: 0
		 */
		ulong cmd_start = images->cmdline_start;
		ulong cmd_end = images->cmdline_end;
		ulong initrd_start = images->initrd_start;
		ulong initrd_end = images->initrd_end;
		bd_t *kbd = images->kbd;

		debug ("   Booting using board info...\n");
		WATCHDOG_RESET ();
		(*kernel) (kbd, initrd_start, initrd_end,
			   cmd_start, cmd_end, 0, 0);
		/* does not return */
	}
	return ;
}

void arch_lmb_reserve(struct lmb *lmb)
{
	phys_size_t bootm_size;
	ulong size, sp, bootmap_base;

	bootmap_base = getenv_bootm_low();
	bootm_size = getenv_bootm_size();

#ifdef DEBUG
	if (((u64)bootmap_base + bootm_size) >
	    (CONFIG_SYS_SDRAM_BASE + (u64)gd->ram_size))
		puts("WARNING: bootm_low + bootm_size exceed total memory\n");
	if ((bootmap_base + bootm_size) > get_effective_memsize())
		puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
#endif

	size = min(bootm_size, get_effective_memsize());
	size = min(size, (ulong)CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);

	if (size < bootm_size) {
		ulong base = bootmap_base + size;
		printf("WARNING: adjusting available memory to %lx\n", size);
		lmb_reserve(lmb, base, bootm_size - size);
	}

	/*
	 * Booting a (Linux) kernel image
	 *
	 * Allocate space for command line and board info - the
	 * address should be as high as possible within the reach of
	 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
	 * memory, which means far enough below the current stack
	 * pointer.
	 */
	sp = get_sp();
	debug ("## Current stack ends at 0x%08lx\n", sp);

	/* adjust sp by 4K to be safe */
	sp -= 4096;
	lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + get_effective_memsize() - sp));

#ifdef CONFIG_MP
	cpu_mp_lmb_reserve(lmb);
#endif

	return ;
}

static void boot_prep_linux(bootm_headers_t *images)
{
#ifdef CONFIG_MP
	/*
	 * if we are MP make sure to flush the device tree so any changes are
	 * made visibile to all other cores.  In AMP boot scenarios the cores
	 * might not be HW cache coherent with each other.
	 */
	flush_cache((unsigned long)images->ft_addr, images->ft_len);
#endif
}

static int boot_cmdline_linux(bootm_headers_t *images)
{
	ulong of_size = images->ft_len;
	struct lmb *lmb = &images->lmb;
	ulong *cmd_start = &images->cmdline_start;
	ulong *cmd_end = &images->cmdline_end;

	int ret = 0;

	if (!of_size) {
		/* allocate space and init command line */
		ret = boot_get_cmdline (lmb, cmd_start, cmd_end);
		if (ret) {
			puts("ERROR with allocation of cmdline\n");
			return ret;
		}
	}

	return ret;
}

static int boot_bd_t_linux(bootm_headers_t *images)
{
	ulong of_size = images->ft_len;
	struct lmb *lmb = &images->lmb;
	bd_t **kbd = &images->kbd;

	int ret = 0;

	if (!of_size) {
		/* allocate space for kernel copy of board info */
		ret = boot_get_kbd (lmb, kbd);
		if (ret) {
			puts("ERROR with allocation of kernel bd\n");
			return ret;
		}
		set_clocks_in_mhz(*kbd);
	}

	return ret;
}

static int boot_body_linux(bootm_headers_t *images)
{
	int ret;

	/* allocate space for kernel copy of board info */
	ret = boot_bd_t_linux(images);
	if (ret)
		return ret;

	ret = image_setup_linux(images);
	if (ret)
		return ret;

	return 0;
}

noinline
int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
{
	int	ret;

	if (flag & BOOTM_STATE_OS_CMDLINE) {
		boot_cmdline_linux(images);
		return 0;
	}

	if (flag & BOOTM_STATE_OS_BD_T) {
		boot_bd_t_linux(images);
		return 0;
	}

	if (flag & BOOTM_STATE_OS_PREP) {
		boot_prep_linux(images);
		return 0;
	}

	boot_prep_linux(images);
	ret = boot_body_linux(images);
	if (ret)
		return ret;
	boot_jump_linux(images);

	return 0;
}

static ulong get_sp (void)
{
	ulong sp;

	asm( "mr %0,1": "=r"(sp) : );
	return sp;
}

static void set_clocks_in_mhz (bd_t *kbd)
{
	char	*s;

	if ((s = getenv ("clocks_in_mhz")) != NULL) {
		/* convert all clock information to MHz */
		kbd->bi_intfreq /= 1000000L;
		kbd->bi_busfreq /= 1000000L;
#if defined(CONFIG_CPM2)
		kbd->bi_cpmfreq /= 1000000L;
		kbd->bi_brgfreq /= 1000000L;
		kbd->bi_sccfreq /= 1000000L;
		kbd->bi_vco	/= 1000000L;
#endif
#if defined(CONFIG_MPC5xxx)
		kbd->bi_ipbfreq /= 1000000L;
		kbd->bi_pcifreq /= 1000000L;
#endif /* CONFIG_MPC5xxx */
	}
}

#if defined(CONFIG_BOOTM_VXWORKS)
void boot_prep_vxworks(bootm_headers_t *images)
{
#if defined(CONFIG_OF_LIBFDT)
	int off;
	u64 base, size;

	if (!images->ft_addr)
		return;

	base = (u64)gd->bd->bi_memstart;
	size = (u64)gd->bd->bi_memsize;

	off = fdt_path_offset(images->ft_addr, "/memory");
	if (off < 0)
		fdt_fixup_memory(images->ft_addr, base, size);

#if defined(CONFIG_MP)
#if defined(CONFIG_MPC85xx)
	ft_fixup_cpu(images->ft_addr, base + size);
	ft_fixup_num_cores(images->ft_addr);
#elif defined(CONFIG_MPC86xx)
	off = fdt_add_mem_rsv(images->ft_addr,
			determine_mp_bootpg(NULL), (u64)4096);
	if (off < 0)
		printf("## WARNING %s: %s\n", __func__, fdt_strerror(off));
	ft_fixup_num_cores(images->ft_addr);
#endif
	flush_cache((unsigned long)images->ft_addr, images->ft_len);
#endif
#endif
}

void boot_jump_vxworks(bootm_headers_t *images)
{
	/* PowerPC VxWorks boot interface conforms to the ePAPR standard
	 * general purpuse registers:
	 *
	 *	r3: Effective address of the device tree image
	 *	r4: 0
	 *	r5: 0
	 *	r6: ePAPR magic value
	 *	r7: shall be the size of the boot IMA in bytes
	 *	r8: 0
	 *	r9: 0
	 *	TCR: WRC = 0, no watchdog timer reset will occur
	 */
	WATCHDOG_RESET();

	((void (*)(void *, ulong, ulong, ulong,
		ulong, ulong, ulong))images->ep)(images->ft_addr,
		0, 0, EPAPR_MAGIC, getenv_bootm_mapsize(), 0, 0);
}
#endif