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1 | /* | |
2 | * Copyright (c) 2011 The Chromium OS Authors. | |
3 | * SPDX-License-Identifier: GPL-2.0+ | |
4 | */ | |
5 | #define DEBUG | |
6 | #include <common.h> | |
7 | #include <dm.h> | |
8 | #include <errno.h> | |
9 | #include <libfdt.h> | |
10 | #include <os.h> | |
11 | #include <asm/io.h> | |
12 | #include <asm/state.h> | |
13 | #include <dm/root.h> | |
14 | ||
15 | DECLARE_GLOBAL_DATA_PTR; | |
16 | ||
17 | /* Enable access to PCI memory with map_sysmem() */ | |
18 | static bool enable_pci_map; | |
19 | ||
20 | #ifdef CONFIG_PCI | |
21 | /* Last device that was mapped into memory, and length of mapping */ | |
22 | static struct udevice *map_dev; | |
23 | unsigned long map_len; | |
24 | #endif | |
25 | ||
26 | void sandbox_exit(void) | |
27 | { | |
28 | /* Do this here while it still has an effect */ | |
29 | os_fd_restore(); | |
30 | if (state_uninit()) | |
31 | os_exit(2); | |
32 | ||
33 | if (dm_uninit()) | |
34 | os_exit(2); | |
35 | ||
36 | /* This is considered normal termination for now */ | |
37 | os_exit(0); | |
38 | } | |
39 | ||
40 | /* delay x useconds */ | |
41 | void __udelay(unsigned long usec) | |
42 | { | |
43 | struct sandbox_state *state = state_get_current(); | |
44 | ||
45 | if (!state->skip_delays) | |
46 | os_usleep(usec); | |
47 | } | |
48 | ||
49 | int cleanup_before_linux(void) | |
50 | { | |
51 | return 0; | |
52 | } | |
53 | ||
54 | int cleanup_before_linux_select(int flags) | |
55 | { | |
56 | return 0; | |
57 | } | |
58 | ||
59 | void *phys_to_virt(phys_addr_t paddr) | |
60 | { | |
61 | return (void *)(gd->arch.ram_buf + paddr); | |
62 | } | |
63 | ||
64 | phys_addr_t virt_to_phys(void *vaddr) | |
65 | { | |
66 | return (phys_addr_t)((uint8_t *)vaddr - gd->arch.ram_buf); | |
67 | } | |
68 | ||
69 | void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) | |
70 | { | |
71 | #if defined(CONFIG_PCI) && !defined(CONFIG_SPL_BUILD) | |
72 | unsigned long plen = len; | |
73 | void *ptr; | |
74 | ||
75 | map_dev = NULL; | |
76 | if (enable_pci_map && !pci_map_physmem(paddr, &len, &map_dev, &ptr)) { | |
77 | if (plen != len) { | |
78 | printf("%s: Warning: partial map at %x, wanted %lx, got %lx\n", | |
79 | __func__, (uint)paddr, len, plen); | |
80 | } | |
81 | map_len = len; | |
82 | return ptr; | |
83 | } | |
84 | #endif | |
85 | ||
86 | return phys_to_virt(paddr); | |
87 | } | |
88 | ||
89 | void unmap_physmem(const void *vaddr, unsigned long flags) | |
90 | { | |
91 | #ifdef CONFIG_PCI | |
92 | if (map_dev) { | |
93 | pci_unmap_physmem(vaddr, map_len, map_dev); | |
94 | map_dev = NULL; | |
95 | } | |
96 | #endif | |
97 | } | |
98 | ||
99 | void sandbox_set_enable_pci_map(int enable) | |
100 | { | |
101 | enable_pci_map = enable; | |
102 | } | |
103 | ||
104 | phys_addr_t map_to_sysmem(const void *ptr) | |
105 | { | |
106 | return (u8 *)ptr - gd->arch.ram_buf; | |
107 | } | |
108 | ||
109 | void flush_dcache_range(unsigned long start, unsigned long stop) | |
110 | { | |
111 | } | |
112 | ||
113 | void invalidate_dcache_range(unsigned long start, unsigned long stop) | |
114 | { | |
115 | } | |
116 | ||
117 | int sandbox_read_fdt_from_file(void) | |
118 | { | |
119 | struct sandbox_state *state = state_get_current(); | |
120 | const char *fname = state->fdt_fname; | |
121 | void *blob; | |
122 | loff_t size; | |
123 | int err; | |
124 | int fd; | |
125 | ||
126 | blob = map_sysmem(CONFIG_SYS_FDT_LOAD_ADDR, 0); | |
127 | if (!state->fdt_fname) { | |
128 | err = fdt_create_empty_tree(blob, 256); | |
129 | if (!err) | |
130 | goto done; | |
131 | printf("Unable to create empty FDT: %s\n", fdt_strerror(err)); | |
132 | return -EINVAL; | |
133 | } | |
134 | ||
135 | err = os_get_filesize(fname, &size); | |
136 | if (err < 0) { | |
137 | printf("Failed to file FDT file '%s'\n", fname); | |
138 | return err; | |
139 | } | |
140 | fd = os_open(fname, OS_O_RDONLY); | |
141 | if (fd < 0) { | |
142 | printf("Failed to open FDT file '%s'\n", fname); | |
143 | return -EACCES; | |
144 | } | |
145 | if (os_read(fd, blob, size) != size) { | |
146 | os_close(fd); | |
147 | return -EIO; | |
148 | } | |
149 | os_close(fd); | |
150 | ||
151 | done: | |
152 | gd->fdt_blob = blob; | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
157 | ulong timer_get_boot_us(void) | |
158 | { | |
159 | static uint64_t base_count; | |
160 | uint64_t count = os_get_nsec(); | |
161 | ||
162 | if (!base_count) | |
163 | base_count = count; | |
164 | ||
165 | return (count - base_count) / 1000; | |
166 | } |