/******************************************************************************* * * Module Name: rscalc - Calculate stream and list lengths * $Revision: 32 $ * ******************************************************************************/ /* * Copyright (C) 2000, 2001 R. Byron Moore * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "acpi.h" #include "acresrc.h" #include "amlcode.h" #include "acnamesp.h" #define _COMPONENT ACPI_RESOURCES MODULE_NAME ("rscalc") /******************************************************************************* * * FUNCTION: Acpi_rs_calculate_byte_stream_length * * PARAMETERS: Linked_list - Pointer to the resource linked list * Size_needed - u32 pointer of the size buffer needed * to properly return the parsed data * * RETURN: Status * * DESCRIPTION: Takes the resource byte stream and parses it once, calculating * the size buffer needed to hold the linked list that conveys * the resource data. * ******************************************************************************/ acpi_status acpi_rs_calculate_byte_stream_length ( acpi_resource *linked_list, u32 *size_needed) { u32 byte_stream_size_needed = 0; u32 segment_size; acpi_resource_ext_irq *ex_irq = NULL; u8 done = FALSE; FUNCTION_TRACE ("Rs_calculate_byte_stream_length"); while (!done) { /* * Init the variable that will hold the size to add to the total. */ segment_size = 0; switch (linked_list->id) { case ACPI_RSTYPE_IRQ: /* * IRQ Resource * For an IRQ Resource, Byte 3, although optional, will * always be created - it holds IRQ information. */ segment_size = 4; break; case ACPI_RSTYPE_DMA: /* * DMA Resource * For this resource the size is static */ segment_size = 3; break; case ACPI_RSTYPE_START_DPF: /* * Start Dependent Functions Resource * For a Start_dependent_functions Resource, Byte 1, * although optional, will always be created. */ segment_size = 2; break; case ACPI_RSTYPE_END_DPF: /* * End Dependent Functions Resource * For this resource the size is static */ segment_size = 1; break; case ACPI_RSTYPE_IO: /* * IO Port Resource * For this resource the size is static */ segment_size = 8; break; case ACPI_RSTYPE_FIXED_IO: /* * Fixed IO Port Resource * For this resource the size is static */ segment_size = 4; break; case ACPI_RSTYPE_VENDOR: /* * Vendor Defined Resource * For a Vendor Specific resource, if the Length is * between 1 and 7 it will be created as a Small * Resource data type, otherwise it is a Large * Resource data type. */ if (linked_list->data.vendor_specific.length > 7) { segment_size = 3; } else { segment_size = 1; } segment_size += linked_list->data.vendor_specific.length; break; case ACPI_RSTYPE_END_TAG: /* * End Tag * For this resource the size is static */ segment_size = 2; done = TRUE; break; case ACPI_RSTYPE_MEM24: /* * 24-Bit Memory Resource * For this resource the size is static */ segment_size = 12; break; case ACPI_RSTYPE_MEM32: /* * 32-Bit Memory Range Resource * For this resource the size is static */ segment_size = 20; break; case ACPI_RSTYPE_FIXED_MEM32: /* * 32-Bit Fixed Memory Resource * For this resource the size is static */ segment_size = 12; break; case ACPI_RSTYPE_ADDRESS16: /* * 16-Bit Address Resource * The base size of this byte stream is 16. If a * Resource Source string is not NULL, add 1 for * the Index + the length of the null terminated * string Resource Source + 1 for the null. */ segment_size = 16; if (NULL != linked_list->data.address16.resource_source.string_ptr) { segment_size += (1 + linked_list->data.address16.resource_source.string_length); } break; case ACPI_RSTYPE_ADDRESS32: /* * 32-Bit Address Resource * The base size of this byte stream is 26. If a Resource * Source string is not NULL, add 1 for the Index + the * length of the null terminated string Resource Source + * 1 for the null. */ segment_size = 26; if (NULL != linked_list->data.address32.resource_source.string_ptr) { segment_size += (1 + linked_list->data.address32.resource_source.string_length); } break; case ACPI_RSTYPE_ADDRESS64: /* * 64-Bit Address Resource * The base size of this byte stream is 46. If a Resource * Source string is not NULL, add 1 for the Index + the * length of the null terminated string Resource Source + * 1 for the null. */ segment_size = 46; if (NULL != linked_list->data.address64.resource_source.string_ptr) { segment_size += (1 + linked_list->data.address64.resource_source.string_length); } break; case ACPI_RSTYPE_EXT_IRQ: /* * Extended IRQ Resource * The base size of this byte stream is 9. This is for an * Interrupt table length of 1. For each additional * interrupt, add 4. * If a Resource Source string is not NULL, add 1 for the * Index + the length of the null terminated string * Resource Source + 1 for the null. */ segment_size = 9 + ((linked_list->data.extended_irq.number_of_interrupts - 1) * 4); if (NULL != ex_irq->resource_source.string_ptr) { segment_size += (1 + linked_list->data.extended_irq.resource_source.string_length); } break; default: /* * If we get here, everything is out of sync, * so exit with an error */ return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE); break; } /* switch (Linked_list->Id) */ /* * Update the total */ byte_stream_size_needed += segment_size; /* * Point to the next object */ linked_list = POINTER_ADD (acpi_resource, linked_list, linked_list->length); } /* * This is the data the caller needs */ *size_needed = byte_stream_size_needed; return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: Acpi_rs_calculate_list_length * * PARAMETERS: Byte_stream_buffer - Pointer to the resource byte stream * Byte_stream_buffer_length - Size of Byte_stream_buffer * Size_needed - u32 pointer of the size buffer * needed to properly return the * parsed data * * RETURN: Status * * DESCRIPTION: Takes the resource byte stream and parses it once, calculating * the size buffer needed to hold the linked list that conveys * the resource data. * ******************************************************************************/ acpi_status acpi_rs_calculate_list_length ( u8 *byte_stream_buffer, u32 byte_stream_buffer_length, u32 *size_needed) { u32 buffer_size = 0; u32 bytes_parsed = 0; u8 number_of_interrupts = 0; u8 number_of_channels = 0; u8 resource_type; u32 structure_size; u32 bytes_consumed; u8 *buffer; u8 temp8; u16 temp16; u8 index; u8 additional_bytes; FUNCTION_TRACE ("Rs_calculate_list_length"); while (bytes_parsed < byte_stream_buffer_length) { /* * The next byte in the stream is the resource type */ resource_type = acpi_rs_get_resource_type (*byte_stream_buffer); switch (resource_type) { case RESOURCE_DESC_MEMORY_24: /* * 24-Bit Memory Resource */ bytes_consumed = 12; structure_size = SIZEOF_RESOURCE (acpi_resource_mem24); break; case RESOURCE_DESC_LARGE_VENDOR: /* * Vendor Defined Resource */ buffer = byte_stream_buffer; ++buffer; MOVE_UNALIGNED16_TO_16 (&temp16, buffer); bytes_consumed = temp16 + 3; /* * Ensure a 32-bit boundary for the structure */ temp16 = (u16) ROUND_UP_TO_32_bITS (temp16); structure_size = SIZEOF_RESOURCE (acpi_resource_vendor) + (temp16 * sizeof (u8)); break; case RESOURCE_DESC_MEMORY_32: /* * 32-Bit Memory Range Resource */ bytes_consumed = 20; structure_size = SIZEOF_RESOURCE (acpi_resource_mem32); break; case RESOURCE_DESC_FIXED_MEMORY_32: /* * 32-Bit Fixed Memory Resource */ bytes_consumed = 12; structure_size = SIZEOF_RESOURCE (acpi_resource_fixed_mem32); break; case RESOURCE_DESC_QWORD_ADDRESS_SPACE: /* * 64-Bit Address Resource */ buffer = byte_stream_buffer; ++buffer; MOVE_UNALIGNED16_TO_16 (&temp16, buffer); bytes_consumed = temp16 + 3; /* * Resource Source Index and Resource Source are * optional elements. Check the length of the * Bytestream. If it is greater than 43, that * means that an Index exists and is followed by * a null termininated string. Therefore, set * the temp variable to the length minus the minimum * byte stream length plus the byte for the Index to * determine the size of the NULL terminiated string. */ if (43 < temp16) { temp8 = (u8) (temp16 - 44); } else { temp8 = 0; } /* * Ensure a 64-bit boundary for the structure */ temp8 = (u8) ROUND_UP_TO_64_bITS (temp8); structure_size = SIZEOF_RESOURCE (acpi_resource_address64) + (temp8 * sizeof (u8)); break; case RESOURCE_DESC_DWORD_ADDRESS_SPACE: /* * 32-Bit Address Resource */ buffer = byte_stream_buffer; ++buffer; MOVE_UNALIGNED16_TO_16 (&temp16, buffer); bytes_consumed = temp16 + 3; /* * Resource Source Index and Resource Source are * optional elements. Check the length of the * Bytestream. If it is greater than 23, that * means that an Index exists and is followed by * a null termininated string. Therefore, set * the temp variable to the length minus the minimum * byte stream length plus the byte for the Index to * determine the size of the NULL terminiated string. */ if (23 < temp16) { temp8 = (u8) (temp16 - 24); } else { temp8 = 0; } /* * Ensure a 32-bit boundary for the structure */ temp8 = (u8) ROUND_UP_TO_32_bITS (temp8); structure_size = SIZEOF_RESOURCE (acpi_resource_address32) + (temp8 * sizeof (u8)); break; case RESOURCE_DESC_WORD_ADDRESS_SPACE: /* * 16-Bit Address Resource */ buffer = byte_stream_buffer; ++buffer; MOVE_UNALIGNED16_TO_16 (&temp16, buffer); bytes_consumed = temp16 + 3; /* * Resource Source Index and Resource Source are * optional elements. Check the length of the * Bytestream. If it is greater than 13, that * means that an Index exists and is followed by * a null termininated string. Therefore, set * the temp variable to the length minus the minimum * byte stream length plus the byte for the Index to * determine the size of the NULL terminiated string. */ if (13 < temp16) { temp8 = (u8) (temp16 - 14); } else { temp8 = 0; } /* * Ensure a 32-bit boundary for the structure */ temp8 = (u8) ROUND_UP_TO_32_bITS (temp8); structure_size = SIZEOF_RESOURCE (acpi_resource_address16) + (temp8 * sizeof (u8)); break; case RESOURCE_DESC_EXTENDED_XRUPT: /* * Extended IRQ */ buffer = byte_stream_buffer; ++buffer; MOVE_UNALIGNED16_TO_16 (&temp16, buffer); bytes_consumed = temp16 + 3; /* * Point past the length field and the * Interrupt vector flags to save off the * Interrupt table length to the Temp8 variable. */ buffer += 3; temp8 = *buffer; /* * To compensate for multiple interrupt numbers, add 4 bytes for * each additional interrupts greater than 1 */ additional_bytes = (u8) ((temp8 - 1) * 4); /* * Resource Source Index and Resource Source are * optional elements. Check the length of the * Bytestream. If it is greater than 9, that * means that an Index exists and is followed by * a null termininated string. Therefore, set * the temp variable to the length minus the minimum * byte stream length plus the byte for the Index to * determine the size of the NULL terminiated string. */ if (9 + additional_bytes < temp16) { temp8 = (u8) (temp16 - (9 + additional_bytes)); } else { temp8 = 0; } /* * Ensure a 32-bit boundary for the structure */ temp8 = (u8) ROUND_UP_TO_32_bITS (temp8); structure_size = SIZEOF_RESOURCE (acpi_resource_ext_irq) + (additional_bytes * sizeof (u8)) + (temp8 * sizeof (u8)); break; case RESOURCE_DESC_IRQ_FORMAT: /* * IRQ Resource. * Determine if it there are two or three trailing bytes */ buffer = byte_stream_buffer; temp8 = *buffer; if(temp8 & 0x01) { bytes_consumed = 4; } else { bytes_consumed = 3; } /* * Point past the descriptor */ ++buffer; /* * Look at the number of bits set */ MOVE_UNALIGNED16_TO_16 (&temp16, buffer); for (index = 0; index < 16; index++) { if (temp16 & 0x1) { ++number_of_interrupts; } temp16 >>= 1; } structure_size = SIZEOF_RESOURCE (acpi_resource_io) + (number_of_interrupts * sizeof (u32)); break; case RESOURCE_DESC_DMA_FORMAT: /* * DMA Resource */ buffer = byte_stream_buffer; bytes_consumed = 3; /* * Point past the descriptor */ ++buffer; /* * Look at the number of bits set */ temp8 = *buffer; for(index = 0; index < 8; index++) { if(temp8 & 0x1) { ++number_of_channels; } temp8 >>= 1; } structure_size = SIZEOF_RESOURCE (acpi_resource_dma) + (number_of_channels * sizeof (u32)); break; case RESOURCE_DESC_START_DEPENDENT: /* * Start Dependent Functions Resource * Determine if it there are two or three trailing bytes */ buffer = byte_stream_buffer; temp8 = *buffer; if(temp8 & 0x01) { bytes_consumed = 2; } else { bytes_consumed = 1; } structure_size = SIZEOF_RESOURCE (acpi_resource_start_dpf); break; case RESOURCE_DESC_END_DEPENDENT: /* * End Dependent Functions Resource */ bytes_consumed = 1; structure_size = ACPI_RESOURCE_LENGTH; break; case RESOURCE_DESC_IO_PORT: /* * IO Port Resource */ bytes_consumed = 8; structure_size = SIZEOF_RESOURCE (acpi_resource_io); break; case RESOURCE_DESC_FIXED_IO_PORT: /* * Fixed IO Port Resource */ bytes_consumed = 4; structure_size = SIZEOF_RESOURCE (acpi_resource_fixed_io); break; case RESOURCE_DESC_SMALL_VENDOR: /* * Vendor Specific Resource */ buffer = byte_stream_buffer; temp8 = *buffer; temp8 = (u8) (temp8 & 0x7); bytes_consumed = temp8 + 1; /* * Ensure a 32-bit boundary for the structure */ temp8 = (u8) ROUND_UP_TO_32_bITS (temp8); structure_size = SIZEOF_RESOURCE (acpi_resource_vendor) + (temp8 * sizeof (u8)); break; case RESOURCE_DESC_END_TAG: /* * End Tag */ bytes_consumed = 2; structure_size = ACPI_RESOURCE_LENGTH; byte_stream_buffer_length = bytes_parsed; break; default: /* * If we get here, everything is out of sync, * so exit with an error */ return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE); break; } /* * Update the return value and counter */ buffer_size += structure_size; bytes_parsed += bytes_consumed; /* * Set the byte stream to point to the next resource */ byte_stream_buffer += bytes_consumed; } /* * This is the data the caller needs */ *size_needed = buffer_size; return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: Acpi_rs_calculate_pci_routing_table_length * * PARAMETERS: Package_object - Pointer to the package object * Buffer_size_needed - u32 pointer of the size buffer * needed to properly return the * parsed data * * RETURN: Status * * DESCRIPTION: Given a package representing a PCI routing table, this * calculates the size of the corresponding linked list of * descriptions. * ******************************************************************************/ acpi_status acpi_rs_calculate_pci_routing_table_length ( acpi_operand_object *package_object, u32 *buffer_size_needed) { u32 number_of_elements; u32 temp_size_needed = 0; acpi_operand_object **top_object_list; u32 index; acpi_operand_object *package_element; acpi_operand_object **sub_object_list; u8 name_found; u32 table_index; FUNCTION_TRACE ("Rs_calculate_pci_routing_table_length"); number_of_elements = package_object->package.count; /* * Calculate the size of the return buffer. * The base size is the number of elements * the sizes of the * structures. Additional space for the strings is added below. * The minus one is to subtract the size of the u8 Source[1] * member because it is added below. * * But each PRT_ENTRY structure has a pointer to a string and * the size of that string must be found. */ top_object_list = package_object->package.elements; for (index = 0; index < number_of_elements; index++) { /* * Dereference the sub-package */ package_element = *top_object_list; /* * The Sub_object_list will now point to an array of the * four IRQ elements: Address, Pin, Source and Source_index */ sub_object_list = package_element->package.elements; /* * Scan the Irq_table_elements for the Source Name String */ name_found = FALSE; for (table_index = 0; table_index < 4 && !name_found; table_index++) { if ((ACPI_TYPE_STRING == (*sub_object_list)->common.type) || ((INTERNAL_TYPE_REFERENCE == (*sub_object_list)->common.type) && ((*sub_object_list)->reference.opcode == AML_INT_NAMEPATH_OP))) { name_found = TRUE; } else { /* * Look at the next element */ sub_object_list++; } } temp_size_needed += (sizeof (pci_routing_table) - 4); /* * Was a String type found? */ if (TRUE == name_found) { if (ACPI_TYPE_STRING == (*sub_object_list)->common.type) { /* * The length String.Length field includes the * terminating NULL */ temp_size_needed += (*sub_object_list)->string.length; } else { temp_size_needed += acpi_ns_get_pathname_length ( (*sub_object_list)->reference.node); } } else { /* * If no name was found, then this is a NULL, which is * translated as a u32 zero. */ temp_size_needed += sizeof (u32); } /* Round up the size since each element must be aligned */ temp_size_needed = ROUND_UP_TO_64_bITS (temp_size_needed); /* * Point to the next acpi_operand_object */ top_object_list++; } /* * Adding an extra element to the end of the list, essentially a NULL terminator */ *buffer_size_needed = temp_size_needed + sizeof (pci_routing_table); return_ACPI_STATUS (AE_OK); }