1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2018 Cisco Systems, Inc.
4 * (C) Copyright 2019 Synamedia
5 *
6 * Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
7 */
8
9 #include <cpu_func.h>
10 #include <init.h>
11 #include <log.h>
12 #include <time.h>
13 #include <asm/global_data.h>
14 #include <linux/types.h>
15 #include <common.h>
16 #include <env.h>
17 #include <asm/io.h>
18 #include <asm/bootm.h>
19 #include <mach/timer.h>
20 #include <mmc.h>
21 #include <fdtdec.h>
22
23 DECLARE_GLOBAL_DATA_PTR;
24
25 #define BCMSTB_DATA_SECTION __attribute__((section(".data")))
26
27 struct bcmstb_boot_parameters bcmstb_boot_parameters BCMSTB_DATA_SECTION;
28
29 phys_addr_t prior_stage_fdt_address BCMSTB_DATA_SECTION;
30
31 union reg_value_union {
32 const char *data;
33 const phys_addr_t *address;
34 };
35
board_init(void)36 int board_init(void)
37 {
38 return 0;
39 }
40
get_board_rev(void)41 u32 get_board_rev(void)
42 {
43 return 0;
44 }
45
reset_cpu(ulong ignored)46 void reset_cpu(ulong ignored)
47 {
48 }
49
print_cpuinfo(void)50 int print_cpuinfo(void)
51 {
52 return 0;
53 }
54
dram_init(void)55 int dram_init(void)
56 {
57 if (fdtdec_setup_mem_size_base() != 0)
58 return -EINVAL;
59
60 return 0;
61 }
62
dram_init_banksize(void)63 int dram_init_banksize(void)
64 {
65 fdtdec_setup_memory_banksize();
66
67 /*
68 * On this SoC, U-Boot is running as an ELF file. Change the
69 * relocation address to CONFIG_SYS_TEXT_BASE, so that in
70 * setup_reloc, gd->reloc_off works out to 0, effectively
71 * disabling relocation. Otherwise U-Boot hangs in the setup
72 * instructions just before relocate_code in
73 * arch/arm/lib/crt0.S.
74 */
75 gd->relocaddr = CONFIG_SYS_TEXT_BASE;
76
77 return 0;
78 }
79
enable_caches(void)80 void enable_caches(void)
81 {
82 /*
83 * This port assumes that the prior stage bootloader has
84 * enabled I-cache and D-cache already. Implementing this
85 * function silences the warning in the default function.
86 */
87 }
88
timer_init(void)89 int timer_init(void)
90 {
91 gd->arch.timer_rate_hz = readl(BCMSTB_TIMER_FREQUENCY);
92
93 return 0;
94 }
95
get_tbclk(void)96 ulong get_tbclk(void)
97 {
98 return gd->arch.timer_rate_hz;
99 }
100
get_ticks(void)101 uint64_t get_ticks(void)
102 {
103 gd->timebase_h = readl(BCMSTB_TIMER_HIGH);
104 gd->timebase_l = readl(BCMSTB_TIMER_LOW);
105
106 return ((uint64_t)gd->timebase_h << 32) | gd->timebase_l;
107 }
108
board_late_init(void)109 int board_late_init(void)
110 {
111 debug("Arguments from prior stage bootloader:\n");
112 debug("General Purpose Register 0: 0x%x\n", bcmstb_boot_parameters.r0);
113 debug("General Purpose Register 1: 0x%x\n", bcmstb_boot_parameters.r1);
114 debug("General Purpose Register 2: 0x%x\n", bcmstb_boot_parameters.r2);
115 debug("General Purpose Register 3: 0x%x\n", bcmstb_boot_parameters.r3);
116 debug("Stack Pointer Register: 0x%x\n", bcmstb_boot_parameters.sp);
117 debug("Link Register: 0x%x\n", bcmstb_boot_parameters.lr);
118 debug("Assuming timer frequency register at: 0x%p\n",
119 (void *)BCMSTB_TIMER_FREQUENCY);
120 debug("Read timer frequency (in Hz): %ld\n", gd->arch.timer_rate_hz);
121 debug("Prior stage provided DTB at: 0x%p\n",
122 (void *)prior_stage_fdt_address);
123
124 /*
125 * Set fdtcontroladdr in the environment so that scripts can
126 * refer to it, for example, to reuse it for fdtaddr.
127 */
128 env_set_hex("fdtcontroladdr", prior_stage_fdt_address);
129
130 /*
131 * Do not set machid to the machine identifier value provided
132 * by the prior stage bootloader (bcmstb_boot_parameters.r1)
133 * because we're using a device tree to boot Linux.
134 */
135
136 return 0;
137 }
138