sandbox: Allow reading/writing of RAM buffer
[karo-tx-uboot.git] / arch / sandbox / cpu / start.c
1 /*
2  * Copyright (c) 2011-2012 The Chromium OS Authors.
3  * SPDX-License-Identifier:     GPL-2.0+
4  */
5
6 #include <common.h>
7 #include <os.h>
8 #include <asm/getopt.h>
9 #include <asm/sections.h>
10 #include <asm/state.h>
11
12 DECLARE_GLOBAL_DATA_PTR;
13
14 int sandbox_early_getopt_check(void)
15 {
16         struct sandbox_state *state = state_get_current();
17         struct sandbox_cmdline_option **sb_opt = __u_boot_sandbox_option_start;
18         size_t num_options = __u_boot_sandbox_option_count();
19         size_t i;
20         int max_arg_len, max_noarg_len;
21
22         /* parse_err will be a string of the faulting option */
23         if (!state->parse_err)
24                 return 0;
25
26         if (strcmp(state->parse_err, "help")) {
27                 printf("u-boot: error: failed while parsing option: %s\n"
28                         "\ttry running with --help for more information.\n",
29                         state->parse_err);
30                 os_exit(1);
31         }
32
33         printf(
34                 "u-boot, a command line test interface to U-Boot\n\n"
35                 "Usage: u-boot [options]\n"
36                 "Options:\n");
37
38         max_arg_len = 0;
39         for (i = 0; i < num_options; ++i)
40                 max_arg_len = max(strlen(sb_opt[i]->flag), max_arg_len);
41         max_noarg_len = max_arg_len + 7;
42
43         for (i = 0; i < num_options; ++i) {
44                 struct sandbox_cmdline_option *opt = sb_opt[i];
45
46                 /* first output the short flag if it has one */
47                 if (opt->flag_short >= 0x100)
48                         printf("      ");
49                 else
50                         printf("  -%c, ", opt->flag_short);
51
52                 /* then the long flag */
53                 if (opt->has_arg)
54                         printf("--%-*s <arg> ", max_arg_len, opt->flag);
55                 else
56                         printf("--%-*s", max_noarg_len, opt->flag);
57
58                 /* finally the help text */
59                 printf("  %s\n", opt->help);
60         }
61
62         os_exit(0);
63 }
64
65 static int sandbox_cmdline_cb_help(struct sandbox_state *state, const char *arg)
66 {
67         /* just flag to sandbox_early_getopt_check to show usage */
68         return 1;
69 }
70 SANDBOX_CMDLINE_OPT_SHORT(help, 'h', 0, "Display help");
71
72 int sandbox_main_loop_init(void)
73 {
74         struct sandbox_state *state = state_get_current();
75
76         /* Execute command if required */
77         if (state->cmd) {
78                 run_command_list(state->cmd, -1, 0);
79                 if (!state->interactive)
80                         os_exit(state->exit_type);
81         }
82
83         return 0;
84 }
85
86 static int sandbox_cmdline_cb_command(struct sandbox_state *state,
87                                       const char *arg)
88 {
89         state->cmd = arg;
90         return 0;
91 }
92 SANDBOX_CMDLINE_OPT_SHORT(command, 'c', 1, "Execute U-Boot command");
93
94 static int sandbox_cmdline_cb_fdt(struct sandbox_state *state, const char *arg)
95 {
96         state->fdt_fname = arg;
97         return 0;
98 }
99 SANDBOX_CMDLINE_OPT_SHORT(fdt, 'd', 1, "Specify U-Boot's control FDT");
100
101 static int sandbox_cmdline_cb_interactive(struct sandbox_state *state,
102                                           const char *arg)
103 {
104         state->interactive = true;
105         return 0;
106 }
107
108 SANDBOX_CMDLINE_OPT_SHORT(interactive, 'i', 0, "Enter interactive mode");
109
110 static int sandbox_cmdline_cb_memory(struct sandbox_state *state,
111                                      const char *arg)
112 {
113         int err;
114
115         /* For now assume we always want to write it */
116         state->write_ram_buf = true;
117         state->ram_buf_fname = arg;
118
119         if (os_read_ram_buf(arg)) {
120                 printf("Failed to read RAM buffer\n");
121                 return err;
122         }
123
124         return 0;
125 }
126 SANDBOX_CMDLINE_OPT_SHORT(memory, 'm', 1,
127                           "Read/write ram_buf memory contents from file");
128
129 int main(int argc, char *argv[])
130 {
131         struct sandbox_state *state;
132         int err;
133
134         err = state_init();
135         if (err)
136                 return err;
137
138         state = state_get_current();
139         if (os_parse_args(state, argc, argv))
140                 return 1;
141
142         /* Do pre- and post-relocation init */
143         board_init_f(0);
144
145         board_init_r(gd->new_gd, 0);
146
147         /* NOTREACHED - board_init_r() does not return */
148         return 0;
149 }