1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * Copyright (C) Paul Mackerras 1997.
 
 
 
 
 
 4 */
 5#include <stdarg.h>
 6#include <stddef.h>
 7#include "types.h"
 8#include "elf.h"
 9#include "string.h"
10#include "stdio.h"
11#include "page.h"
12#include "ops.h"
13
14#include "of.h"
15
16/* Value picked to match that used by yaboot */
17#define PROG_START	0x01400000	/* only used on 64-bit systems */
18#define RAM_END		(512<<20)	/* Fixme: use OF */
19#define	ONE_MB		0x100000
20
21
22
23static unsigned long claim_base;
24
25void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
26			 unsigned long r6, unsigned long r7);
27
28static void *of_try_claim(unsigned long size)
29{
30	unsigned long addr = 0;
31
32	if (claim_base == 0)
33		claim_base = _ALIGN_UP((unsigned long)_end, ONE_MB);
34
35	for(; claim_base < RAM_END; claim_base += ONE_MB) {
36#ifdef DEBUG
37		printf("    trying: 0x%08lx\n\r", claim_base);
38#endif
39		addr = (unsigned long) of_claim(claim_base, size, 0);
40		if (addr != PROM_ERROR)
41			break;
42	}
43	if (addr == 0)
44		return NULL;
45	claim_base = PAGE_ALIGN(claim_base + size);
46	return (void *)addr;
47}
48
49static void of_image_hdr(const void *hdr)
50{
51	const Elf64_Ehdr *elf64 = hdr;
52
53	if (elf64->e_ident[EI_CLASS] == ELFCLASS64) {
54		/*
55		 * Maintain a "magic" minimum address. This keeps some older
56		 * firmware platforms running.
57		 */
58		if (claim_base < PROG_START)
59			claim_base = PROG_START;
60	}
61}
62
63static void of_platform_init(unsigned long a1, unsigned long a2, void *promptr)
64{
65	platform_ops.image_hdr = of_image_hdr;
66	platform_ops.malloc = of_try_claim;
67	platform_ops.exit = of_exit;
68	platform_ops.vmlinux_alloc = of_vmlinux_alloc;
69
70	dt_ops.finddevice = of_finddevice;
71	dt_ops.getprop = of_getprop;
72	dt_ops.setprop = of_setprop;
73
74	of_console_init();
75
76	of_init(promptr);
77	loader_info.promptr = promptr;
78	if (a1 && a2 && a2 != 0xdeadbeef) {
79		loader_info.initrd_addr = a1;
80		loader_info.initrd_size = a2;
81	}
82}
83
84void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
85		   unsigned long r6, unsigned long r7)
86{
87	/* Detect OF vs. ePAPR boot */
88	if (r5)
89		of_platform_init(r3, r4, (void *)r5);
90	else
91		epapr_platform_init(r3, r4, r5, r6, r7);
92}
93

 
 1/*
 2 * Copyright (C) Paul Mackerras 1997.
 3 *
 4 * This program is free software; you can redistribute it and/or
 5 * modify it under the terms of the GNU General Public License
 6 * as published by the Free Software Foundation; either version
 7 * 2 of the License, or (at your option) any later version.
 8 */
 9#include <stdarg.h>
10#include <stddef.h>
11#include "types.h"
12#include "elf.h"
13#include "string.h"
14#include "stdio.h"
15#include "page.h"
16#include "ops.h"
17
18#include "of.h"
19
20/* Value picked to match that used by yaboot */
21#define PROG_START	0x01400000	/* only used on 64-bit systems */
22#define RAM_END		(512<<20)	/* Fixme: use OF */
23#define	ONE_MB		0x100000
24
25
26
27static unsigned long claim_base;
28
29void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
30			 unsigned long r6, unsigned long r7);
31
32static void *of_try_claim(unsigned long size)
33{
34	unsigned long addr = 0;
35
36	if (claim_base == 0)
37		claim_base = _ALIGN_UP((unsigned long)_end, ONE_MB);
38
39	for(; claim_base < RAM_END; claim_base += ONE_MB) {
40#ifdef DEBUG
41		printf("    trying: 0x%08lx\n\r", claim_base);
42#endif
43		addr = (unsigned long)of_claim(claim_base, size, 0);
44		if ((void *)addr != (void *)-1)
45			break;
46	}
47	if (addr == 0)
48		return NULL;
49	claim_base = PAGE_ALIGN(claim_base + size);
50	return (void *)addr;
51}
52
53static void of_image_hdr(const void *hdr)
54{
55	const Elf64_Ehdr *elf64 = hdr;
56
57	if (elf64->e_ident[EI_CLASS] == ELFCLASS64) {
58		/*
59		 * Maintain a "magic" minimum address. This keeps some older
60		 * firmware platforms running.
61		 */
62		if (claim_base < PROG_START)
63			claim_base = PROG_START;
64	}
65}
66
67static void of_platform_init(unsigned long a1, unsigned long a2, void *promptr)
68{
69	platform_ops.image_hdr = of_image_hdr;
70	platform_ops.malloc = of_try_claim;
71	platform_ops.exit = of_exit;
72	platform_ops.vmlinux_alloc = of_vmlinux_alloc;
73
74	dt_ops.finddevice = of_finddevice;
75	dt_ops.getprop = of_getprop;
76	dt_ops.setprop = of_setprop;
77
78	of_console_init();
79
80	of_init(promptr);
81	loader_info.promptr = promptr;
82	if (a1 && a2 && a2 != 0xdeadbeef) {
83		loader_info.initrd_addr = a1;
84		loader_info.initrd_size = a2;
85	}
86}
87
88void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
89		   unsigned long r6, unsigned long r7)
90{
91	/* Detect OF vs. ePAPR boot */
92	if (r5)
93		of_platform_init(r3, r4, (void *)r5);
94	else
95		epapr_platform_init(r3, r4, r5, r6, r7);
96}
97