2 * Copyright (c) 2011-2012 The Chromium OS Authors.
3 * SPDX-License-Identifier: GPL-2.0+
6 #ifndef __SANDBOX_STATE_H
7 #define __SANDBOX_STATE_H
12 #include <linux/stringify.h>
15 * Selects the behavior of the serial terminal.
17 * If Ctrl-C is processed by U-Boot, then the only way to quit sandbox is with
18 * the 'reset' command, or equivalent.
20 * If the terminal is cooked, then Ctrl-C will terminate U-Boot, and the
21 * command line will not be quite such a faithful emulation.
25 * raw-with-sigs - Raw, but allow signals (Ctrl-C will quit)
26 * raw - Terminal is always raw
27 * cooked - Terminal is always cooked
29 enum state_terminal_raw {
30 STATE_TERM_RAW_WITH_SIGS, /* Default */
37 struct sandbox_spi_info {
42 /* The complete state of the test system */
43 struct sandbox_state {
44 const char *cmd; /* Command to execute */
45 bool interactive; /* Enable cmdline after execute */
46 bool run_distro_boot; /* Automatically run distro bootcommands */
47 const char *fdt_fname; /* Filename of FDT binary */
48 const char *parse_err; /* Error to report from parsing */
49 int argc; /* Program arguments */
50 char **argv; /* Command line arguments */
51 const char *jumped_fname; /* Jumped from previous U_Boot */
52 uint8_t *ram_buf; /* Emulated RAM buffer */
53 unsigned int ram_size; /* Size of RAM buffer */
54 const char *ram_buf_fname; /* Filename to use for RAM buffer */
55 bool ram_buf_rm; /* Remove RAM buffer file after read */
56 bool write_ram_buf; /* Write RAM buffer on exit */
57 const char *state_fname; /* File containing sandbox state */
58 void *state_fdt; /* Holds saved state for sandbox */
59 bool read_state; /* Read sandbox state on startup */
60 bool write_state; /* Write sandbox state on exit */
61 bool ignore_missing_state_on_read; /* No error if state missing */
62 bool show_lcd; /* Show LCD on start-up */
63 enum reset_t last_reset; /* Last reset type */
64 bool reset_allowed[RESET_COUNT]; /* Allowed reset types */
65 enum state_terminal_raw term_raw; /* Terminal raw/cooked */
66 bool skip_delays; /* Ignore any time delays (for test) */
68 /* Pointer to information for each SPI bus/cs */
69 struct sandbox_spi_info spi[CONFIG_SANDBOX_SPI_MAX_BUS]
70 [CONFIG_SANDBOX_SPI_MAX_CS];
73 /* Minimum space we guarantee in the state FDT when calling read/write*/
74 #define SANDBOX_STATE_MIN_SPACE 0x1000
77 * struct sandbox_state_io - methods to saved/restore sandbox state
78 * @name: Name of of the device tree node, also the name of the variable
79 * holding this data so it should be an identifier (use underscore
81 * @compat: Compatible string for the node containing this state
83 * @read: Function to read state from FDT
84 * If data is available, then blob and node will provide access to it. If
85 * not (blob == NULL and node == -1) this function should set up an empty
86 * data set for start-of-day.
87 * @param blob: Pointer to device tree blob, or NULL if no data to read
88 * @param node: Node offset to read from
89 * @return 0 if OK, -ve on error
91 * @write: Function to write state to FDT
92 * The caller will ensure that there is a node ready for the state. The
93 * node may already contain the old state, in which case it should be
94 * overridden. There is guaranteed to be SANDBOX_STATE_MIN_SPACE bytes
95 * of free space, so error checking is not required for fdt_setprop...()
96 * calls which add up to less than this much space.
98 * For adding larger properties, use state_setprop().
100 * @param blob: Device tree blob holding state
101 * @param node: Node to write our state into
103 * Note that it is possible to save data as large blobs or as individual
104 * hierarchical properties. However, unless you intend to keep state files
105 * around for a long time and be able to run an old state file on a new
106 * sandbox, it might not be worth using individual properties for everything.
107 * This is certainly supported, it is just a matter of the effort you wish
108 * to put into the state read/write feature.
110 struct sandbox_state_io {
113 int (*write)(void *blob, int node);
114 int (*read)(const void *blob, int node);
118 * SANDBOX_STATE_IO - Declare sandbox state to read/write
120 * Sandbox permits saving state from one run and restoring it in another. This
121 * allows the test system to retain state between runs and thus better
122 * emulate a real system. Examples of state that might be useful to save are
123 * the emulated GPIOs pin settings, flash memory contents and TPM private
124 * data. U-Boot memory contents is dealth with separately since it is large
125 * and it is not normally useful to save it (since a normal system does not
126 * preserve DRAM between runs). See the '-m' option for this.
128 * See struct sandbox_state_io above for member documentation.
130 #define SANDBOX_STATE_IO(_name, _compat, _read, _write) \
131 ll_entry_declare(struct sandbox_state_io, _name, state_io) = { \
132 .name = __stringify(_name), \
139 * Gets a pointer to the current state.
141 * @return pointer to state
143 struct sandbox_state *state_get_current(void);
146 * Read the sandbox state from the supplied device tree file
148 * This calls all registered state handlers to read in the sandbox state
149 * from a previous test run.
151 * @param state Sandbox state to update
152 * @param fname Filename of device tree file to read from
153 * @return 0 if OK, -ve on error
155 int sandbox_read_state(struct sandbox_state *state, const char *fname);
158 * Write the sandbox state to the supplied device tree file
160 * This calls all registered state handlers to write out the sandbox state
161 * so that it can be preserved for a future test run.
163 * If the file exists it is overwritten.
165 * @param state Sandbox state to update
166 * @param fname Filename of device tree file to write to
167 * @return 0 if OK, -ve on error
169 int sandbox_write_state(struct sandbox_state *state, const char *fname);
172 * Add a property to a sandbox state node
174 * This is equivalent to fdt_setprop except that it automatically enlarges
175 * the device tree if necessary. That means it is safe to write any amount
178 * This function can only be called from within struct sandbox_state_io's
179 * ->write method, i.e. within state I/O drivers.
181 * @param node Device tree node to write to
182 * @param prop_name Property to write
183 * @param data Data to write into property
184 * @param size Size of data to write into property
186 int state_setprop(int node, const char *prop_name, const void *data, int size);
189 * Control skipping of time delays
191 * Some tests have unnecessay time delays (e.g. USB). Allow these to be
192 * skipped to speed up testing
194 * @param skip_delays true to skip delays from now on, false to honour delay
197 void state_set_skip_delays(bool skip_delays);
200 * See if delays should be skipped
202 * @return true if delays should be skipped, false if they should be honoured
204 bool state_get_skip_delays(void);
207 * Initialize the test system state
209 int state_init(void);
212 * Uninitialize the test system state, writing out state if configured to
215 * @return 0 if OK, -ve on error
217 int state_uninit(void);