/* * These interfaces are required in order to compile the ASL compiler and the * various ACPICA tools under Linux or other Unix-like system.
*/ #include <acpi/acpi.h> #include"accommon.h" #include"amlcode.h" #include"acparser.h" #include"acdebug.h"
/****************************************************************************** * * FUNCTION: os_enter_line_edit_mode, os_exit_line_edit_mode * * PARAMETERS: None * * RETURN: None * * DESCRIPTION: Enter/Exit the raw character input mode for the terminal. * * Interactive line-editing support for the AML debugger. Used with the * common/acgetline module. * * readline() is not used because of non-portability. It is not available * on all systems, and if it is, often the package must be manually installed. * * Therefore, we use the POSIX tcgetattr/tcsetattr and do the minimal line * editing that we need in acpi_os_get_line. * * If the POSIX tcgetattr/tcsetattr interfaces are unavailable, these * calls will also work: * For os_enter_line_edit_mode: system ("stty cbreak -echo") * For os_exit_line_edit_mode: system ("stty cooked echo") *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_predefined_override * * PARAMETERS: init_val - Initial value of the predefined object * new_val - The new value for the object * * RETURN: Status, pointer to value. Null pointer returned if not * overriding. * * DESCRIPTION: Allow the OS to override predefined names *
*****************************************************************************/
if (!init_val || !new_val) { return (AE_BAD_PARAMETER);
}
*new_val = NULL; return (AE_OK);
}
/****************************************************************************** * * FUNCTION: acpi_os_table_override * * PARAMETERS: existing_table - Header of current table (probably * firmware) * new_table - Where an entire new table is returned. * * RETURN: Status, pointer to new table. Null pointer returned if no * table is available to override * * DESCRIPTION: Return a different version of a table if one is available *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_physical_table_override * * PARAMETERS: existing_table - Header of current table (probably firmware) * new_address - Where new table address is returned * (Physical address) * new_table_length - Where new table length is returned * * RETURN: Status, address/length of new table. Null pointer returned * if no table is available to override. * * DESCRIPTION: Returns AE_SUPPORT, function not used in user space. *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_enter_sleep * * PARAMETERS: sleep_state - Which sleep state to enter * rega_value - Register A value * regb_value - Register B value * * RETURN: Status * * DESCRIPTION: A hook before writing sleep registers to enter the sleep * state. Return AE_CTRL_TERMINATE to skip further sleep register * writes. *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_redirect_output * * PARAMETERS: destination - An open file handle/pointer * * RETURN: None * * DESCRIPTION: Causes redirect of acpi_os_printf and acpi_os_vprintf *
*****************************************************************************/
void acpi_os_redirect_output(void *destination)
{
acpi_gbl_output_file = destination;
}
/****************************************************************************** * * FUNCTION: acpi_os_printf * * PARAMETERS: fmt, ... - Standard printf format * * RETURN: None * * DESCRIPTION: Formatted output. Note: very similar to acpi_os_vprintf * (performance), changes should be tracked in both functions. *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_vprintf * * PARAMETERS: fmt - Standard printf format * args - Argument list * * RETURN: None * * DESCRIPTION: Formatted output with argument list pointer. Note: very * similar to acpi_os_printf, changes should be tracked in both * functions. *
*****************************************************************************/
/* * We build the output string in a local buffer because we may be * outputting the buffer twice. Using vfprintf is problematic because * some implementations modify the args pointer/structure during * execution. Thus, we use the local buffer for portability. * * Note: Since this module is intended for use by the various ACPICA * utilities/applications, we can safely declare the buffer on the stack. * Also, This function is used for relatively small error messages only.
*/
vsnprintf(buffer, ACPI_VPRINTF_BUFFER_SIZE, fmt, args);
flags = acpi_gbl_db_output_flags; if (flags & ACPI_DB_REDIRECTABLE_OUTPUT) {
/* Output is directable to either a file (if open) or the console */
if (acpi_gbl_debug_file) {
/* Output file is open, send the output there */
fputs(buffer, acpi_gbl_debug_file);
} else { /* No redirection, send output to console (once only!) */
flags |= ACPI_DB_CONSOLE_OUTPUT;
}
}
if (flags & ACPI_DB_CONSOLE_OUTPUT) {
fputs(buffer, acpi_gbl_output_file);
}
}
#ifndef ACPI_EXEC_APP /****************************************************************************** * * FUNCTION: acpi_os_get_line * * PARAMETERS: buffer - Where to return the command line * buffer_length - Maximum length of Buffer * bytes_read - Where the actual byte count is returned * * RETURN: Status and actual bytes read * * DESCRIPTION: Get the next input line from the terminal. NOTE: For the * acpi_exec utility, we use the acgetline module instead to * provide line-editing and history support. *
*****************************************************************************/
/* Standard acpi_os_get_line for all utilities except acpi_exec */
for (end_of_line = 0;; end_of_line++) { if (end_of_line >= buffer_length) { return (AE_BUFFER_OVERFLOW);
}
if ((input_char = getchar()) == EOF) { return (AE_ERROR);
}
if (!input_char || input_char == _ASCII_NEWLINE) { break;
}
buffer[end_of_line] = (char)input_char;
}
/* Null terminate the buffer */
buffer[end_of_line] = 0;
/* Return the number of bytes in the string */
if (bytes_read) {
*bytes_read = end_of_line;
}
return (AE_OK);
} #endif
#ifndef ACPI_USE_NATIVE_MEMORY_MAPPING /****************************************************************************** * * FUNCTION: acpi_os_map_memory * * PARAMETERS: where - Physical address of memory to be mapped * length - How much memory to map * * RETURN: Pointer to mapped memory. Null on error. * * DESCRIPTION: Map physical memory into caller's address space *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_unmap_memory * * PARAMETERS: where - Logical address of memory to be unmapped * length - How much memory to unmap * * RETURN: None. * * DESCRIPTION: Delete a previously created mapping. Where and Length must * correspond to a previous mapping exactly. *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_allocate * * PARAMETERS: size - Amount to allocate, in bytes * * RETURN: Pointer to the new allocation. Null on error. * * DESCRIPTION: Allocate memory. Algorithm is dependent on the OS. *
*****************************************************************************/
mem = (void *)malloc((size_t) size); return (mem);
}
#ifdef USE_NATIVE_ALLOCATE_ZEROED /****************************************************************************** * * FUNCTION: acpi_os_allocate_zeroed * * PARAMETERS: size - Amount to allocate, in bytes * * RETURN: Pointer to the new allocation. Null on error. * * DESCRIPTION: Allocate and zero memory. Algorithm is dependent on the OS. *
*****************************************************************************/
mem = (void *)calloc(1, (size_t) size); return (mem);
} #endif
/****************************************************************************** * * FUNCTION: acpi_os_free * * PARAMETERS: mem - Pointer to previously allocated memory * * RETURN: None. * * DESCRIPTION: Free memory allocated via acpi_os_allocate *
*****************************************************************************/
void acpi_os_free(void *mem)
{
free(mem);
}
#ifdef ACPI_SINGLE_THREADED /****************************************************************************** * * FUNCTION: Semaphore stub functions * * DESCRIPTION: Stub functions used for single-thread applications that do * not require semaphore synchronization. Full implementations * of these functions appear after the stubs. *
*****************************************************************************/
#else /****************************************************************************** * * FUNCTION: acpi_os_create_semaphore * * PARAMETERS: initial_units - Units to be assigned to the new semaphore * out_handle - Where a handle will be returned * * RETURN: Status * * DESCRIPTION: Create an OS semaphore *
*****************************************************************************/
snprintf(semaphore_name, sizeof(semaphore_name), "acpi_sem_%d",
semaphore_count++);
printf("%s\n", semaphore_name);
sem =
sem_open(semaphore_name, O_EXCL | O_CREAT, 0755,
initial_units); if (!sem) { return (AE_NO_MEMORY);
}
sem_unlink(semaphore_name); /* This just deletes the name */
}
#else
sem = acpi_os_allocate(sizeof(sem_t)); if (!sem) { return (AE_NO_MEMORY);
}
if (!sem) { return (AE_BAD_PARAMETER);
} #ifdef __APPLE__ if (sem_close(sem) == -1) { return (AE_BAD_PARAMETER);
} #else if (sem_destroy(sem) == -1) { return (AE_BAD_PARAMETER);
} #endif
return (AE_OK);
}
/****************************************************************************** * * FUNCTION: acpi_os_wait_semaphore * * PARAMETERS: handle - Handle returned by acpi_os_create_semaphore * units - How many units to wait for * msec_timeout - How long to wait (milliseconds) * * RETURN: Status * * DESCRIPTION: Wait for units *
*****************************************************************************/
switch (msec_timeout) { /* * No Wait: * -------- * A zero timeout value indicates that we shouldn't wait - just * acquire the semaphore if available otherwise return AE_TIME * (a.k.a. 'would block').
*/ case 0:
if (sem_trywait(sem) == -1) {
status = (AE_TIME);
} break;
/* Wait Indefinitely */
case ACPI_WAIT_FOREVER:
while (((ret_val = sem_wait(sem)) == -1) && (errno == EINTR)) { continue; /* Restart if interrupted */
} if (ret_val != 0) {
status = (AE_TIME);
} break;
/* Wait with msec_timeout */
default:
#ifdef ACPI_USE_ALTERNATE_TIMEOUT /* * Alternate timeout mechanism for environments where * sem_timedwait is not available or does not work properly.
*/ while (msec_timeout) { if (sem_trywait(sem) == 0) {
/* Got the semaphore */ return (AE_OK);
}
if (msec_timeout >= 10) {
msec_timeout -= 10;
usleep(10 * ACPI_USEC_PER_MSEC); /* ten milliseconds */
} else {
msec_timeout--;
usleep(ACPI_USEC_PER_MSEC); /* one millisecond */
}
}
status = (AE_TIME); #else /* * The interface to sem_timedwait is an absolute time, so we need to * get the current time, then add in the millisecond Timeout value.
*/ if (clock_gettime(CLOCK_REALTIME, &time) == -1) {
perror("clock_gettime"); return (AE_TIME);
}
while (((ret_val = sem_timedwait(sem, &time)) == -1)
&& (errno == EINTR)) { continue; /* Restart if interrupted */
}
if (ret_val != 0) { if (errno != ETIMEDOUT) {
perror("sem_timedwait");
}
status = (AE_TIME);
} #endif break;
}
return (status);
}
/****************************************************************************** * * FUNCTION: acpi_os_signal_semaphore * * PARAMETERS: handle - Handle returned by acpi_os_create_semaphore * units - Number of units to send * * RETURN: Status * * DESCRIPTION: Send units *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_install_interrupt_handler * * PARAMETERS: interrupt_number - Level handler should respond to. * isr - Address of the ACPI interrupt handler * except_ptr - Where status is returned * * RETURN: Handle to the newly installed handler. * * DESCRIPTION: Install an interrupt handler. Used to install the ACPI * OS-independent handler. *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_stall * * PARAMETERS: microseconds - Time to sleep * * RETURN: Blocks until sleep is completed. * * DESCRIPTION: Sleep at microsecond granularity *
*****************************************************************************/
void acpi_os_stall(u32 microseconds)
{
if (microseconds) {
usleep(microseconds);
}
}
/****************************************************************************** * * FUNCTION: acpi_os_sleep * * PARAMETERS: milliseconds - Time to sleep * * RETURN: Blocks until sleep is completed. * * DESCRIPTION: Sleep at millisecond granularity *
*****************************************************************************/
void acpi_os_sleep(u64 milliseconds)
{
/* Sleep for whole seconds */
sleep(milliseconds / ACPI_MSEC_PER_SEC);
/* * Sleep for remaining microseconds. * Arg to usleep() is in usecs and must be less than 1,000,000 (1 second).
*/
usleep((milliseconds % ACPI_MSEC_PER_SEC) * ACPI_USEC_PER_MSEC);
}
/****************************************************************************** * * FUNCTION: acpi_os_get_timer * * PARAMETERS: None * * RETURN: Current time in 100 nanosecond units * * DESCRIPTION: Get the current system time *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_read_pci_configuration * * PARAMETERS: pci_id - Seg/Bus/Dev * pci_register - Device Register * value - Buffer where value is placed * width - Number of bits * * RETURN: Status * * DESCRIPTION: Read data from PCI configuration space *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_write_pci_configuration * * PARAMETERS: pci_id - Seg/Bus/Dev * pci_register - Device Register * value - Value to be written * width - Number of bits * * RETURN: Status. * * DESCRIPTION: Write data to PCI configuration space *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_read_port * * PARAMETERS: address - Address of I/O port/register to read * value - Where value is placed * width - Number of bits * * RETURN: Value read from port * * DESCRIPTION: Read data from an I/O port or register *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_write_port * * PARAMETERS: address - Address of I/O port/register to write * value - Value to write * width - Number of bits * * RETURN: None * * DESCRIPTION: Write data to an I/O port or register *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_read_memory * * PARAMETERS: address - Physical Memory Address to read * value - Where value is placed * width - Number of bits (8,16,32, or 64) * * RETURN: Value read from physical memory address. Always returned * as a 64-bit integer, regardless of the read width. * * DESCRIPTION: Read data from a physical memory address *
*****************************************************************************/
switch (width) { case 8: case 16: case 32: case 64:
*value = 0; break;
default:
return (AE_BAD_PARAMETER);
} return (AE_OK);
}
/****************************************************************************** * * FUNCTION: acpi_os_write_memory * * PARAMETERS: address - Physical Memory Address to write * value - Value to write * width - Number of bits (8,16,32, or 64) * * RETURN: None * * DESCRIPTION: Write data to a physical memory address *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_readable * * PARAMETERS: pointer - Area to be verified * length - Size of area * * RETURN: TRUE if readable for entire length * * DESCRIPTION: Verify that a pointer is valid for reading *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_writable * * PARAMETERS: pointer - Area to be verified * length - Size of area * * RETURN: TRUE if writable for entire length * * DESCRIPTION: Verify that a pointer is valid for writing *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_signal * * PARAMETERS: function - ACPI A signal function code * info - Pointer to function-dependent structure * * RETURN: Status * * DESCRIPTION: Miscellaneous functions. Example implementation only. *
*****************************************************************************/
#ifndef ACPI_SINGLE_THREADED /****************************************************************************** * * FUNCTION: acpi_os_get_thread_id * * PARAMETERS: None * * RETURN: Id of the running thread * * DESCRIPTION: Get the ID of the current (running) thread *
*****************************************************************************/
/****************************************************************************** * * FUNCTION: acpi_os_execute * * PARAMETERS: type - Type of execution * function - Address of the function to execute * context - Passed as a parameter to the function * * RETURN: Status. * * DESCRIPTION: Execute a new thread *
*****************************************************************************/
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