1 /*
2  * (C) Copyright 2013
3  * David Feng <fenghua@phytium.com.cn>
4  * Sharma Bhupesh <bhupesh.sharma@freescale.com>
5  *
6  * SPDX-License-Identifier:	GPL-2.0+
7  */
8 #include <common.h>
9 #include <malloc.h>
10 #include <errno.h>
11 #include <netdev.h>
12 #include <asm/io.h>
13 #include <linux/compiler.h>
14 #include <asm/semihosting.h>
15 
16 DECLARE_GLOBAL_DATA_PTR;
17 
18 int board_init(void)
19 {
20 	return 0;
21 }
22 
23 int dram_init(void)
24 {
25 	/*
26 	 * Clear spin table so that secondary processors
27 	 * observe the correct value after waken up from wfe.
28 	 */
29 	*(unsigned long *)CPU_RELEASE_ADDR = 0;
30 
31 	gd->ram_size = PHYS_SDRAM_1_SIZE;
32 	return 0;
33 }
34 
35 /*
36  * Board specific reset that is system reset.
37  */
38 void reset_cpu(ulong addr)
39 {
40 }
41 
42 #ifdef CONFIG_BOARD_LATE_INIT
43 int board_late_init(void)
44 {
45 #ifdef CONFIG_SEMIHOSTING
46 	/*
47 	 * Please refer to doc/README.semihosting for a more complete
48 	 * description.
49 	 *
50 	 * We require that the board include file defines these env variables:
51 	 * - kernel_name
52 	 * - kernel_addr_r
53 	 * - initrd_name
54 	 * - initrd_addr_r
55 	 * - fdt_name
56 	 * - fdt_addr_r
57 	 *
58 	 * For the "fdt chosen" startup macro, this code will then define:
59 	 * - initrd_end (based on initrd_addr_r plus actual initrd_size)
60 	 *
61 	 * We will then load the kernel, initrd, and fdt into the specified
62 	 * locations in memory in a similar way that the ATF fastmodel code
63 	 * uses semihosting calls to load other boot stages and u-boot itself.
64 	 */
65 
66 	/* Env variable strings */
67 	char *kernel_name = getenv("kernel_name");
68 	char *kernel_addr_str = getenv("kernel_addr_r");
69 	char *initrd_name = getenv("initrd_name");
70 	char *initrd_addr_str = getenv("initrd_addr_r");
71 	char *fdt_name = getenv("fdt_name");
72 	char *fdt_addr_str = getenv("fdt_addr_r");
73 	char initrd_end_str[64];
74 
75 	/* Actual addresses converted from env variables */
76 	void *kernel_addr_r;
77 	void *initrd_addr_r;
78 	void *fdt_addr_r;
79 
80 	/* Actual initrd base and size */
81 	unsigned long initrd_base;
82 	unsigned long initrd_size;
83 
84 	/* Space available */
85 	int avail;
86 
87 	/* Make sure the environment variables needed are set */
88 	if (!(kernel_addr_str && initrd_addr_str && fdt_addr_str)) {
89 		printf("%s: Define {kernel/initrd/fdt}_addr_r\n", __func__);
90 		return -1;
91 	}
92 	if (!(kernel_name && initrd_name && fdt_name)) {
93 		printf("%s: Define {kernel/initrd/fdt}_name\n", __func__);
94 		return -1;
95 	}
96 
97 	/* Get exact initrd_size */
98 	initrd_size = smh_len(initrd_name);
99 	if (initrd_size == -1) {
100 		printf("%s: Can't get file size for \'%s\'\n", __func__,
101 		       initrd_name);
102 		return -1;
103 	}
104 
105 	/* Set initrd_end */
106 	initrd_base = simple_strtoul(initrd_addr_str, NULL, 16);
107 	initrd_addr_r = (void *)initrd_base;
108 	sprintf(initrd_end_str, "0x%lx", initrd_base + initrd_size - 1);
109 	setenv("initrd_end", initrd_end_str);
110 
111 	/* Load kernel to memory */
112 	fdt_addr_r = (void *)simple_strtoul(fdt_addr_str, NULL, 16);
113 	kernel_addr_r = (void *)simple_strtoul(kernel_addr_str, NULL, 16);
114 
115 	/*
116 	 * The kernel must be lower in memory than fdt and loading the
117 	 * kernel must not trample the fdt or vice versa.
118 	 */
119 	avail = fdt_addr_r - kernel_addr_r;
120 	if (avail < 0) {
121 		printf("%s: fdt must be after kernel\n", __func__);
122 		return -1;
123 	}
124 	smh_load(kernel_name, kernel_addr_r, avail, 1);
125 
126 	/* Load fdt to memory */
127 	smh_load(fdt_name, fdt_addr_r, 0x20000, 1);
128 
129 	/* Load initrd to memory */
130 	smh_load(initrd_name, initrd_addr_r, initrd_size, 1);
131 
132 #endif				/* CONFIG_SEMIHOSTING */
133 	return 0;
134 }
135 #endif				/* CONFIG_BOARD_LATE_INIT */
136 
137 /*
138  * Board specific ethernet initialization routine.
139  */
140 int board_eth_init(bd_t *bis)
141 {
142 	int rc = 0;
143 #ifdef CONFIG_SMC91111
144 	rc = smc91111_initialize(0, CONFIG_SMC91111_BASE);
145 #endif
146 	return rc;
147 }
148