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