state.h 9.1 KB

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  1. /* SPDX-License-Identifier: GPL-2.0+ */
  2. /*
  3. * Copyright (c) 2011-2012 The Chromium OS Authors.
  4. */
  5. #ifndef __SANDBOX_STATE_H
  6. #define __SANDBOX_STATE_H
  7. #include <config.h>
  8. #include <sysreset.h>
  9. #include <stdbool.h>
  10. #include <linux/list.h>
  11. #include <linux/stringify.h>
  12. /**
  13. * Selects the behavior of the serial terminal.
  14. *
  15. * If Ctrl-C is processed by U-Boot, then the only way to quit sandbox is with
  16. * the 'reset' command, or equivalent.
  17. *
  18. * If the terminal is cooked, then Ctrl-C will terminate U-Boot, and the
  19. * command line will not be quite such a faithful emulation.
  20. *
  21. * Options are:
  22. *
  23. * raw-with-sigs - Raw, but allow signals (Ctrl-C will quit)
  24. * raw - Terminal is always raw
  25. * cooked - Terminal is always cooked
  26. */
  27. enum state_terminal_raw {
  28. STATE_TERM_RAW_WITH_SIGS, /* Default */
  29. STATE_TERM_RAW,
  30. STATE_TERM_COOKED,
  31. STATE_TERM_COUNT,
  32. };
  33. struct sandbox_spi_info {
  34. struct udevice *emul;
  35. };
  36. struct sandbox_wdt_info {
  37. unsigned long long counter;
  38. uint reset_count;
  39. bool running;
  40. };
  41. /**
  42. * struct sandbox_mapmem_entry - maps pointers to/from U-Boot addresses
  43. *
  44. * When map_to_sysmem() is called with an address outside sandbox's emulated
  45. * RAM, a record is created with a tag that can be used to reference that
  46. * pointer. When map_sysmem() is called later with that tag, the pointer will
  47. * be returned, just as it would for a normal sandbox address.
  48. *
  49. * @tag: Address tag (a value which U-Boot uses to refer to the address)
  50. * @ptr: Associated pointer for that tag
  51. */
  52. struct sandbox_mapmem_entry {
  53. ulong tag;
  54. void *ptr;
  55. struct list_head sibling_node;
  56. };
  57. /* The complete state of the test system */
  58. struct sandbox_state {
  59. const char *cmd; /* Command to execute */
  60. bool interactive; /* Enable cmdline after execute */
  61. bool run_distro_boot; /* Automatically run distro bootcommands */
  62. const char *fdt_fname; /* Filename of FDT binary */
  63. const char *parse_err; /* Error to report from parsing */
  64. int argc; /* Program arguments */
  65. char **argv; /* Command line arguments */
  66. const char *jumped_fname; /* Jumped from previous U_Boot */
  67. uint8_t *ram_buf; /* Emulated RAM buffer */
  68. unsigned long ram_size; /* Size of RAM buffer */
  69. const char *ram_buf_fname; /* Filename to use for RAM buffer */
  70. bool ram_buf_rm; /* Remove RAM buffer file after read */
  71. bool write_ram_buf; /* Write RAM buffer on exit */
  72. const char *state_fname; /* File containing sandbox state */
  73. void *state_fdt; /* Holds saved state for sandbox */
  74. bool read_state; /* Read sandbox state on startup */
  75. bool write_state; /* Write sandbox state on exit */
  76. bool ignore_missing_state_on_read; /* No error if state missing */
  77. bool show_lcd; /* Show LCD on start-up */
  78. bool double_lcd; /* Double display size for high-DPI */
  79. enum sysreset_t last_sysreset; /* Last system reset type */
  80. bool sysreset_allowed[SYSRESET_COUNT]; /* Allowed system reset types */
  81. enum state_terminal_raw term_raw; /* Terminal raw/cooked */
  82. bool skip_delays; /* Ignore any time delays (for test) */
  83. bool show_test_output; /* Don't suppress stdout in tests */
  84. int default_log_level; /* Default log level for sandbox */
  85. bool ram_buf_read; /* true if we read the RAM buffer */
  86. bool run_unittests; /* Run unit tests */
  87. const char *select_unittests; /* Unit test to run */
  88. bool handle_signals; /* Handle signals within sandbox */
  89. /* Pointer to information for each SPI bus/cs */
  90. struct sandbox_spi_info spi[CONFIG_SANDBOX_SPI_MAX_BUS]
  91. [CONFIG_SANDBOX_SPI_MAX_CS];
  92. /* Information about Watchdog */
  93. struct sandbox_wdt_info wdt;
  94. ulong next_tag; /* Next address tag to allocate */
  95. struct list_head mapmem_head; /* struct sandbox_mapmem_entry */
  96. bool hwspinlock; /* Hardware Spinlock status */
  97. bool allow_memio; /* Allow readl() etc. to work */
  98. /*
  99. * This struct is getting large.
  100. *
  101. * Consider putting test data in driver-private structs, like
  102. * sandbox_pch.c.
  103. *
  104. * If you add new members, please put them above this comment.
  105. */
  106. };
  107. /* Minimum space we guarantee in the state FDT when calling read/write*/
  108. #define SANDBOX_STATE_MIN_SPACE 0x1000
  109. /**
  110. * struct sandbox_state_io - methods to saved/restore sandbox state
  111. * @name: Name of of the device tree node, also the name of the variable
  112. * holding this data so it should be an identifier (use underscore
  113. * instead of minus)
  114. * @compat: Compatible string for the node containing this state
  115. *
  116. * @read: Function to read state from FDT
  117. * If data is available, then blob and node will provide access to it. If
  118. * not (blob == NULL and node == -1) this function should set up an empty
  119. * data set for start-of-day.
  120. * @param blob: Pointer to device tree blob, or NULL if no data to read
  121. * @param node: Node offset to read from
  122. * @return 0 if OK, -ve on error
  123. *
  124. * @write: Function to write state to FDT
  125. * The caller will ensure that there is a node ready for the state. The
  126. * node may already contain the old state, in which case it should be
  127. * overridden. There is guaranteed to be SANDBOX_STATE_MIN_SPACE bytes
  128. * of free space, so error checking is not required for fdt_setprop...()
  129. * calls which add up to less than this much space.
  130. *
  131. * For adding larger properties, use state_setprop().
  132. *
  133. * @param blob: Device tree blob holding state
  134. * @param node: Node to write our state into
  135. *
  136. * Note that it is possible to save data as large blobs or as individual
  137. * hierarchical properties. However, unless you intend to keep state files
  138. * around for a long time and be able to run an old state file on a new
  139. * sandbox, it might not be worth using individual properties for everything.
  140. * This is certainly supported, it is just a matter of the effort you wish
  141. * to put into the state read/write feature.
  142. */
  143. struct sandbox_state_io {
  144. const char *name;
  145. const char *compat;
  146. int (*write)(void *blob, int node);
  147. int (*read)(const void *blob, int node);
  148. };
  149. /**
  150. * SANDBOX_STATE_IO - Declare sandbox state to read/write
  151. *
  152. * Sandbox permits saving state from one run and restoring it in another. This
  153. * allows the test system to retain state between runs and thus better
  154. * emulate a real system. Examples of state that might be useful to save are
  155. * the emulated GPIOs pin settings, flash memory contents and TPM private
  156. * data. U-Boot memory contents is dealth with separately since it is large
  157. * and it is not normally useful to save it (since a normal system does not
  158. * preserve DRAM between runs). See the '-m' option for this.
  159. *
  160. * See struct sandbox_state_io above for member documentation.
  161. */
  162. #define SANDBOX_STATE_IO(_name, _compat, _read, _write) \
  163. ll_entry_declare(struct sandbox_state_io, _name, state_io) = { \
  164. .name = __stringify(_name), \
  165. .read = _read, \
  166. .write = _write, \
  167. .compat = _compat, \
  168. }
  169. /**
  170. * Gets a pointer to the current state.
  171. *
  172. * @return pointer to state
  173. */
  174. struct sandbox_state *state_get_current(void);
  175. /**
  176. * Read the sandbox state from the supplied device tree file
  177. *
  178. * This calls all registered state handlers to read in the sandbox state
  179. * from a previous test run.
  180. *
  181. * @param state Sandbox state to update
  182. * @param fname Filename of device tree file to read from
  183. * @return 0 if OK, -ve on error
  184. */
  185. int sandbox_read_state(struct sandbox_state *state, const char *fname);
  186. /**
  187. * Write the sandbox state to the supplied device tree file
  188. *
  189. * This calls all registered state handlers to write out the sandbox state
  190. * so that it can be preserved for a future test run.
  191. *
  192. * If the file exists it is overwritten.
  193. *
  194. * @param state Sandbox state to update
  195. * @param fname Filename of device tree file to write to
  196. * @return 0 if OK, -ve on error
  197. */
  198. int sandbox_write_state(struct sandbox_state *state, const char *fname);
  199. /**
  200. * Add a property to a sandbox state node
  201. *
  202. * This is equivalent to fdt_setprop except that it automatically enlarges
  203. * the device tree if necessary. That means it is safe to write any amount
  204. * of data here.
  205. *
  206. * This function can only be called from within struct sandbox_state_io's
  207. * ->write method, i.e. within state I/O drivers.
  208. *
  209. * @param node Device tree node to write to
  210. * @param prop_name Property to write
  211. * @param data Data to write into property
  212. * @param size Size of data to write into property
  213. */
  214. int state_setprop(int node, const char *prop_name, const void *data, int size);
  215. /**
  216. * Control skipping of time delays
  217. *
  218. * Some tests have unnecessay time delays (e.g. USB). Allow these to be
  219. * skipped to speed up testing
  220. *
  221. * @param skip_delays true to skip delays from now on, false to honour delay
  222. * requests
  223. */
  224. void state_set_skip_delays(bool skip_delays);
  225. /**
  226. * See if delays should be skipped
  227. *
  228. * @return true if delays should be skipped, false if they should be honoured
  229. */
  230. bool state_get_skip_delays(void);
  231. /**
  232. * state_reset_for_test() - Reset ready to re-run tests
  233. *
  234. * This clears out any test state ready for another test run.
  235. */
  236. void state_reset_for_test(struct sandbox_state *state);
  237. /**
  238. * state_show() - Show information about the sandbox state
  239. *
  240. * @param state Sandbox state to show
  241. */
  242. void state_show(struct sandbox_state *state);
  243. /**
  244. * Initialize the test system state
  245. */
  246. int state_init(void);
  247. /**
  248. * Uninitialize the test system state, writing out state if configured to
  249. * do so.
  250. *
  251. * @return 0 if OK, -ve on error
  252. */
  253. int state_uninit(void);
  254. #endif