From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/acpi/tables/tbrsdt.c | 324 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 324 insertions(+) create mode 100644 drivers/acpi/tables/tbrsdt.c (limited to 'drivers/acpi/tables/tbrsdt.c') diff --git a/drivers/acpi/tables/tbrsdt.c b/drivers/acpi/tables/tbrsdt.c new file mode 100644 index 00000000000..9c6913238d5 --- /dev/null +++ b/drivers/acpi/tables/tbrsdt.c @@ -0,0 +1,324 @@ +/****************************************************************************** + * + * Module Name: tbrsdt - ACPI RSDT table utilities + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2005, R. Byron Moore + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + + +#include +#include + + +#define _COMPONENT ACPI_TABLES + ACPI_MODULE_NAME ("tbrsdt") + + +/******************************************************************************* + * + * FUNCTION: acpi_tb_verify_rsdp + * + * PARAMETERS: Address - RSDP (Pointer to RSDT) + * + * RETURN: Status + * + * DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table) + * + ******************************************************************************/ + +acpi_status +acpi_tb_verify_rsdp ( + struct acpi_pointer *address) +{ + struct acpi_table_desc table_info; + acpi_status status; + struct rsdp_descriptor *rsdp; + + + ACPI_FUNCTION_TRACE ("tb_verify_rsdp"); + + + switch (address->pointer_type) { + case ACPI_LOGICAL_POINTER: + + rsdp = address->pointer.logical; + break; + + case ACPI_PHYSICAL_POINTER: + /* + * Obtain access to the RSDP structure + */ + status = acpi_os_map_memory (address->pointer.physical, sizeof (struct rsdp_descriptor), + (void *) &rsdp); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + break; + + default: + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + /* + * The signature and checksum must both be correct + */ + if (ACPI_STRNCMP ((char *) rsdp, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) { + /* Nope, BAD Signature */ + + status = AE_BAD_SIGNATURE; + goto cleanup; + } + + /* Check the standard checksum */ + + if (acpi_tb_checksum (rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0) { + status = AE_BAD_CHECKSUM; + goto cleanup; + } + + /* Check extended checksum if table version >= 2 */ + + if (rsdp->revision >= 2) { + if (acpi_tb_checksum (rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0) { + status = AE_BAD_CHECKSUM; + goto cleanup; + } + } + + /* The RSDP supplied is OK */ + + table_info.pointer = ACPI_CAST_PTR (struct acpi_table_header, rsdp); + table_info.length = sizeof (struct rsdp_descriptor); + table_info.allocation = ACPI_MEM_MAPPED; + + /* Save the table pointers and allocation info */ + + status = acpi_tb_init_table_descriptor (ACPI_TABLE_RSDP, &table_info); + if (ACPI_FAILURE (status)) { + goto cleanup; + } + + /* Save the RSDP in a global for easy access */ + + acpi_gbl_RSDP = ACPI_CAST_PTR (struct rsdp_descriptor, table_info.pointer); + return_ACPI_STATUS (status); + + + /* Error exit */ +cleanup: + + if (acpi_gbl_table_flags & ACPI_PHYSICAL_POINTER) { + acpi_os_unmap_memory (rsdp, sizeof (struct rsdp_descriptor)); + } + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_tb_get_rsdt_address + * + * PARAMETERS: None + * + * RETURN: RSDT physical address + * + * DESCRIPTION: Extract the address of the RSDT or XSDT, depending on the + * version of the RSDP + * + ******************************************************************************/ + +void +acpi_tb_get_rsdt_address ( + struct acpi_pointer *out_address) +{ + + ACPI_FUNCTION_ENTRY (); + + + out_address->pointer_type = acpi_gbl_table_flags | ACPI_LOGICAL_ADDRESSING; + + /* + * For RSDP revision 0 or 1, we use the RSDT. + * For RSDP revision 2 (and above), we use the XSDT + */ + if (acpi_gbl_RSDP->revision < 2) { + out_address->pointer.value = acpi_gbl_RSDP->rsdt_physical_address; + } + else { + out_address->pointer.value = acpi_gbl_RSDP->xsdt_physical_address; + } +} + + +/******************************************************************************* + * + * FUNCTION: acpi_tb_validate_rsdt + * + * PARAMETERS: table_ptr - Addressable pointer to the RSDT. + * + * RETURN: Status + * + * DESCRIPTION: Validate signature for the RSDT or XSDT + * + ******************************************************************************/ + +acpi_status +acpi_tb_validate_rsdt ( + struct acpi_table_header *table_ptr) +{ + int no_match; + + + ACPI_FUNCTION_NAME ("tb_validate_rsdt"); + + + /* + * For RSDP revision 0 or 1, we use the RSDT. + * For RSDP revision 2 and above, we use the XSDT + */ + if (acpi_gbl_RSDP->revision < 2) { + no_match = ACPI_STRNCMP ((char *) table_ptr, RSDT_SIG, + sizeof (RSDT_SIG) -1); + } + else { + no_match = ACPI_STRNCMP ((char *) table_ptr, XSDT_SIG, + sizeof (XSDT_SIG) -1); + } + + if (no_match) { + /* Invalid RSDT or XSDT signature */ + + ACPI_REPORT_ERROR (("Invalid signature where RSDP indicates RSDT/XSDT should be located\n")); + + ACPI_DUMP_BUFFER (acpi_gbl_RSDP, 20); + + ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ERROR, + "RSDT/XSDT signature at %X (%p) is invalid\n", + acpi_gbl_RSDP->rsdt_physical_address, + (void *) (acpi_native_uint) acpi_gbl_RSDP->rsdt_physical_address)); + + if (acpi_gbl_RSDP->revision < 2) { + ACPI_REPORT_ERROR (("Looking for RSDT (RSDP->Rev < 2)\n")) + } + else { + ACPI_REPORT_ERROR (("Looking for XSDT (RSDP->Rev >= 2)\n")) + } + + ACPI_DUMP_BUFFER ((char *) table_ptr, 48); + + return (AE_BAD_SIGNATURE); + } + + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_tb_get_table_rsdt + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table) + * + ******************************************************************************/ + +acpi_status +acpi_tb_get_table_rsdt ( + void) +{ + struct acpi_table_desc table_info; + acpi_status status; + struct acpi_pointer address; + + + ACPI_FUNCTION_TRACE ("tb_get_table_rsdt"); + + + /* Get the RSDT/XSDT via the RSDP */ + + acpi_tb_get_rsdt_address (&address); + + table_info.type = ACPI_TABLE_XSDT; + status = acpi_tb_get_table (&address, &table_info); + if (ACPI_FAILURE (status)) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not get the RSDT/XSDT, %s\n", + acpi_format_exception (status))); + return_ACPI_STATUS (status); + } + + ACPI_DEBUG_PRINT ((ACPI_DB_INFO, + "RSDP located at %p, points to RSDT physical=%8.8X%8.8X \n", + acpi_gbl_RSDP, + ACPI_FORMAT_UINT64 (address.pointer.value))); + + /* Check the RSDT or XSDT signature */ + + status = acpi_tb_validate_rsdt (table_info.pointer); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* Get the number of tables defined in the RSDT or XSDT */ + + acpi_gbl_rsdt_table_count = acpi_tb_get_table_count (acpi_gbl_RSDP, table_info.pointer); + + /* Convert and/or copy to an XSDT structure */ + + status = acpi_tb_convert_to_xsdt (&table_info); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* Save the table pointers and allocation info */ + + status = acpi_tb_init_table_descriptor (ACPI_TABLE_XSDT, &table_info); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + acpi_gbl_XSDT = ACPI_CAST_PTR (XSDT_DESCRIPTOR, table_info.pointer); + + ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "XSDT located at %p\n", acpi_gbl_XSDT)); + return_ACPI_STATUS (status); +} + + -- cgit v1.2.3