1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright (c) 2011-2012 The Chromium OS Authors.
6 #ifndef __SANDBOX_STATE_H
7 #define __SANDBOX_STATE_H
12 #include <linux/list.h>
13 #include <linux/stringify.h>
16 * Selects the behavior of the serial terminal.
18 * If Ctrl-C is processed by U-Boot, then the only way to quit sandbox is with
19 * the 'reset' command, or equivalent.
21 * If the terminal is cooked, then Ctrl-C will terminate U-Boot, and the
22 * command line will not be quite such a faithful emulation.
26 * raw-with-sigs - Raw, but allow signals (Ctrl-C will quit)
27 * raw - Terminal is always raw
28 * cooked - Terminal is always cooked
30 enum state_terminal_raw {
31 STATE_TERM_RAW_WITH_SIGS, /* Default */
38 struct sandbox_spi_info {
42 struct sandbox_wdt_info {
43 unsigned long long counter;
49 * struct sandbox_mapmem_entry - maps pointers to/from U-Boot addresses
51 * When map_to_sysmem() is called with an address outside sandbox's emulated
52 * RAM, a record is created with a tag that can be used to reference that
53 * pointer. When map_sysmem() is called later with that tag, the pointer will
54 * be returned, just as it would for a normal sandbox address.
56 * @tag: Address tag (a value which U-Boot uses to refer to the address)
57 * @ptr: Associated pointer for that tag
59 struct sandbox_mapmem_entry {
62 struct list_head sibling_node;
65 /* The complete state of the test system */
66 struct sandbox_state {
67 const char *cmd; /* Command to execute */
68 bool interactive; /* Enable cmdline after execute */
69 bool run_distro_boot; /* Automatically run distro bootcommands */
70 const char *fdt_fname; /* Filename of FDT binary */
71 const char *parse_err; /* Error to report from parsing */
72 int argc; /* Program arguments */
73 char **argv; /* Command line arguments */
74 const char *jumped_fname; /* Jumped from previous U-Boot */
75 const char *prog_fname; /* U-Boot executable filename */
76 uint8_t *ram_buf; /* Emulated RAM buffer */
77 unsigned long ram_size; /* Size of RAM buffer */
78 const char *ram_buf_fname; /* Filename to use for RAM buffer */
79 bool ram_buf_rm; /* Remove RAM buffer file after read */
80 bool write_ram_buf; /* Write RAM buffer on exit */
81 const char *state_fname; /* File containing sandbox state */
82 void *state_fdt; /* Holds saved state for sandbox */
83 bool read_state; /* Read sandbox state on startup */
84 bool write_state; /* Write sandbox state on exit */
85 bool ignore_missing_state_on_read; /* No error if state missing */
86 bool show_lcd; /* Show LCD on start-up */
87 bool double_lcd; /* Double display size for high-DPI */
88 enum sysreset_t last_sysreset; /* Last system reset type */
89 bool sysreset_allowed[SYSRESET_COUNT]; /* Allowed system reset types */
90 enum state_terminal_raw term_raw; /* Terminal raw/cooked */
91 bool skip_delays; /* Ignore any time delays (for test) */
92 bool show_test_output; /* Don't suppress stdout in tests */
93 int default_log_level; /* Default log level for sandbox */
94 bool ram_buf_read; /* true if we read the RAM buffer */
95 bool run_unittests; /* Run unit tests */
96 const char *select_unittests; /* Unit test to run */
97 bool handle_signals; /* Handle signals within sandbox */
98 bool autoboot_keyed; /* Use keyed-autoboot feature */
99 bool disable_eth; /* Disable Ethernet devices */
100 bool disable_sf_bootdevs; /* Don't bind SPI flash bootdevs */
102 /* Pointer to information for each SPI bus/cs */
103 struct sandbox_spi_info spi[CONFIG_SANDBOX_SPI_MAX_BUS]
104 [CONFIG_SANDBOX_SPI_MAX_CS];
106 /* Information about Watchdog */
107 struct sandbox_wdt_info wdt;
109 ulong next_tag; /* Next address tag to allocate */
110 struct list_head mapmem_head; /* struct sandbox_mapmem_entry */
111 bool hwspinlock; /* Hardware Spinlock status */
112 bool allow_memio; /* Allow readl() etc. to work */
114 void *other_fdt_buf; /* 'other' FDT blob used by tests */
115 int other_size; /* size of other FDT blob */
118 * This struct is getting large.
120 * Consider putting test data in driver-private structs, like
123 * If you add new members, please put them above this comment.
127 /* Minimum space we guarantee in the state FDT when calling read/write*/
128 #define SANDBOX_STATE_MIN_SPACE 0x1000
131 * struct sandbox_state_io - methods to saved/restore sandbox state
132 * @name: Name of of the device tree node, also the name of the variable
133 * holding this data so it should be an identifier (use underscore
135 * @compat: Compatible string for the node containing this state
137 * @read: Function to read state from FDT
138 * If data is available, then blob and node will provide access to it. If
139 * not (blob == NULL and node == -1) this function should set up an empty
140 * data set for start-of-day.
141 * @param blob: Pointer to device tree blob, or NULL if no data to read
142 * @param node: Node offset to read from
143 * Return: 0 if OK, -ve on error
145 * @write: Function to write state to FDT
146 * The caller will ensure that there is a node ready for the state. The
147 * node may already contain the old state, in which case it should be
148 * overridden. There is guaranteed to be SANDBOX_STATE_MIN_SPACE bytes
149 * of free space, so error checking is not required for fdt_setprop...()
150 * calls which add up to less than this much space.
152 * For adding larger properties, use state_setprop().
154 * @param blob: Device tree blob holding state
155 * @param node: Node to write our state into
157 * Note that it is possible to save data as large blobs or as individual
158 * hierarchical properties. However, unless you intend to keep state files
159 * around for a long time and be able to run an old state file on a new
160 * sandbox, it might not be worth using individual properties for everything.
161 * This is certainly supported, it is just a matter of the effort you wish
162 * to put into the state read/write feature.
164 struct sandbox_state_io {
167 int (*write)(void *blob, int node);
168 int (*read)(const void *blob, int node);
172 * SANDBOX_STATE_IO - Declare sandbox state to read/write
174 * Sandbox permits saving state from one run and restoring it in another. This
175 * allows the test system to retain state between runs and thus better
176 * emulate a real system. Examples of state that might be useful to save are
177 * the emulated GPIOs pin settings, flash memory contents and TPM private
178 * data. U-Boot memory contents is dealth with separately since it is large
179 * and it is not normally useful to save it (since a normal system does not
180 * preserve DRAM between runs). See the '-m' option for this.
182 * See struct sandbox_state_io above for member documentation.
184 #define SANDBOX_STATE_IO(_name, _compat, _read, _write) \
185 ll_entry_declare(struct sandbox_state_io, _name, state_io) = { \
186 .name = __stringify(_name), \
193 * Gets a pointer to the current state.
195 * Return: pointer to state
197 struct sandbox_state *state_get_current(void);
200 * Read the sandbox state from the supplied device tree file
202 * This calls all registered state handlers to read in the sandbox state
203 * from a previous test run.
205 * @param state Sandbox state to update
206 * @param fname Filename of device tree file to read from
207 * Return: 0 if OK, -ve on error
209 int sandbox_read_state(struct sandbox_state *state, const char *fname);
212 * Write the sandbox state to the supplied device tree file
214 * This calls all registered state handlers to write out the sandbox state
215 * so that it can be preserved for a future test run.
217 * If the file exists it is overwritten.
219 * @param state Sandbox state to update
220 * @param fname Filename of device tree file to write to
221 * Return: 0 if OK, -ve on error
223 int sandbox_write_state(struct sandbox_state *state, const char *fname);
226 * Add a property to a sandbox state node
228 * This is equivalent to fdt_setprop except that it automatically enlarges
229 * the device tree if necessary. That means it is safe to write any amount
232 * This function can only be called from within struct sandbox_state_io's
233 * ->write method, i.e. within state I/O drivers.
235 * @param node Device tree node to write to
236 * @param prop_name Property to write
237 * @param data Data to write into property
238 * @param size Size of data to write into property
240 int state_setprop(int node, const char *prop_name, const void *data, int size);
243 * Control skipping of time delays
245 * Some tests have unnecessay time delays (e.g. USB). Allow these to be
246 * skipped to speed up testing
248 * @param skip_delays true to skip delays from now on, false to honour delay
251 void state_set_skip_delays(bool skip_delays);
254 * See if delays should be skipped
256 * Return: true if delays should be skipped, false if they should be honoured
258 bool state_get_skip_delays(void);
261 * state_reset_for_test() - Reset ready to re-run tests
263 * This clears out any test state ready for another test run.
265 void state_reset_for_test(struct sandbox_state *state);
268 * state_show() - Show information about the sandbox state
270 * @param state Sandbox state to show
272 void state_show(struct sandbox_state *state);
275 * state_get_rel_filename() - Get a filename relative to the executable
277 * This uses argv[0] to obtain a filename path
279 * @rel_path: Relative path to build, e.g. "arch/sandbox/dts/test.dtb". Must not
281 * @buf: Buffer to use to return the filename
282 * @size: Size of buffer
283 * @return length of filename (including terminator), -ENOSPC if @size is too
286 int state_get_rel_filename(const char *rel_path, char *buf, int size);
289 * state_load_other_fdt() - load the 'other' FDT into a buffer
291 * This loads the other.dtb file into a buffer. This is typically used in tests.
293 * @bufp: Place to put allocated buffer pointer. The buffer is read using
294 * os_read_file() which calls os_malloc(), so does affect U-Boot's own malloc()
296 * @sizep: Returns the size of the buffer
297 * @return 0 if OK, -ve on error
299 int state_load_other_fdt(const char **bufp, int *sizep);
302 * Initialize the test system state
304 int state_init(void);
307 * Uninitialize the test system state, writing out state if configured to
310 * Return: 0 if OK, -ve on error
312 int state_uninit(void);