/******************************************************************************* * * Module Name: rscalc - Acpi_rs_calculate_byte_stream_length * Acpi_rs_calculate_list_length * $Revision$ * ******************************************************************************/ /* * 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 AE_OK if okay, else a valid ACPI_STATUS code * * 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 ( RESOURCE *linked_list, u32 *size_needed) { u32 byte_stream_size_needed = 0; u32 segment_size; EXTENDED_IRQ_RESOURCE *ex_irq = NULL; u8 done = FALSE; while (!done) { /* * Init the variable that will hold the size to add to the * total. */ segment_size = 0; switch (linked_list->id) { case irq: /* * IRQ Resource */ /* * For an IRQ Resource, Byte 3, although optional, will * always be created - it holds IRQ information. */ segment_size = 4; break; case dma: /* * DMA Resource */ /* * For this resource the size is static */ segment_size = 3; break; case start_dependent_functions: /* * Start Dependent Functions Resource */ /* * For a Start_dependent_functions Resource, Byte 1, * although optional, will always be created. */ segment_size = 2; break; case end_dependent_functions: /* * End Dependent Functions Resource */ /* * For this resource the size is static */ segment_size = 1; break; case io: /* * IO Port Resource */ /* * For this resource the size is static */ segment_size = 8; break; case fixed_io: /* * Fixed IO Port Resource */ /* * For this resource the size is static */ segment_size = 4; break; case vendor_specific: /* * 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 end_tag: /* * End Tag */ /* * For this resource the size is static */ segment_size = 2; done = TRUE; break; case memory24: /* * 24-Bit Memory Resource */ /* * For this resource the size is static */ segment_size = 12; break; case memory32: /* * 32-Bit Memory Range Resource */ /* * For this resource the size is static */ segment_size = 20; break; case fixed_memory32: /* * 32-Bit Fixed Memory Resource */ /* * For this resource the size is static */ segment_size = 12; break; case 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) { segment_size += (1 + linked_list->data.address16.resource_source_string_length); } break; case 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.address16.resource_source) { segment_size += (1 + linked_list->data.address16.resource_source_string_length); } break; case extended_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; segment_size += (linked_list->data.extended_irq.number_of_interrupts - 1) * 4; if(NULL != ex_irq->resource_source) { 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 (AE_AML_ERROR); break; } /* switch (Linked_list->Id) */ /* * Update the total */ byte_stream_size_needed += segment_size; /* * Point to the next object */ linked_list = (RESOURCE *) ((NATIVE_UINT) linked_list + (NATIVE_UINT) linked_list->length); } /* * This is the data the caller needs */ *size_needed = byte_stream_size_needed; return (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 AE_OK if okay, else a valid ACPI_STATUS code * * 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; while (bytes_parsed < byte_stream_buffer_length) { /* * Look at the next byte in the stream */ resource_type = *byte_stream_buffer; /* * See if this is a small or large resource */ if(resource_type & 0x80) { /* * Large Resource Type */ switch (resource_type) { case MEMORY_RANGE_24: /* * 24-Bit Memory Resource */ bytes_consumed = 12; structure_size = sizeof (MEMORY24_RESOURCE) + RESOURCE_LENGTH_NO_DATA; break; case LARGE_VENDOR_DEFINED: /* * 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 (VENDOR_RESOURCE) + RESOURCE_LENGTH_NO_DATA + (temp16 * sizeof (u8)); break; case MEMORY_RANGE_32: /* * 32-Bit Memory Range Resource */ bytes_consumed = 20; structure_size = sizeof (MEMORY32_RESOURCE) + RESOURCE_LENGTH_NO_DATA; break; case FIXED_MEMORY_RANGE_32: /* * 32-Bit Fixed Memory Resource */ bytes_consumed = 12; structure_size = sizeof(FIXED_MEMORY32_RESOURCE) + RESOURCE_LENGTH_NO_DATA; break; case 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 (ADDRESS32_RESOURCE) + RESOURCE_LENGTH_NO_DATA + (temp8 * sizeof (u8)); break; case 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 boundry for the structure */ temp8 = (u8) ROUND_UP_TO_32_bITS (temp8); structure_size = sizeof (ADDRESS16_RESOURCE) + RESOURCE_LENGTH_NO_DATA + (temp8 * sizeof (u8)); break; case EXTENDED_IRQ: /* * 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 boundry for the structure */ temp8 = (u8) ROUND_UP_TO_32_bITS (temp8); structure_size = sizeof (EXTENDED_IRQ_RESOURCE) + RESOURCE_LENGTH_NO_DATA + (additional_bytes * sizeof (u8)) + (temp8 * sizeof (u8)); break; /* TBD: [Future] 64-bit not currently supported */ /* case 0x8A: break; */ default: /* * If we get here, everything is out of sync, * so exit with an error */ return (AE_AML_ERROR); break; } } else { /* * Small Resource Type * Only bits 7:3 are valid */ resource_type >>= 3; switch (resource_type) { case 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 (IO_RESOURCE) + RESOURCE_LENGTH_NO_DATA + (number_of_interrupts * sizeof (u32)); break; case 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 (DMA_RESOURCE) + RESOURCE_LENGTH_NO_DATA + (number_of_channels * sizeof (u32)); break; case START_DEPENDENT_TAG: /* * 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 (START_DEPENDENT_FUNCTIONS_RESOURCE) + RESOURCE_LENGTH_NO_DATA; break; case END_DEPENDENT_TAG: /* * End Dependent Functions Resource */ bytes_consumed = 1; structure_size = RESOURCE_LENGTH; break; case IO_PORT_DESCRIPTOR: /* * IO Port Resource */ bytes_consumed = 8; structure_size = sizeof (IO_RESOURCE) + RESOURCE_LENGTH_NO_DATA; break; case FIXED_LOCATION_IO_DESCRIPTOR: /* * Fixed IO Port Resource */ bytes_consumed = 4; structure_size = sizeof (FIXED_IO_RESOURCE) + RESOURCE_LENGTH_NO_DATA; break; case SMALL_VENDOR_DEFINED: /* * Vendor Specific Resource */ buffer = byte_stream_buffer; temp8 = *buffer; temp8 = (u8) (temp8 & 0x7); bytes_consumed = temp8 + 1; /* * Ensure a 32-bit boundry for the structure */ temp8 = (u8) ROUND_UP_TO_32_bITS (temp8); structure_size = sizeof (VENDOR_RESOURCE) + RESOURCE_LENGTH_NO_DATA + (temp8 * sizeof (u8)); break; case END_TAG: /* * End Tag */ bytes_consumed = 2; structure_size = 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 (AE_AML_ERROR); break; } /* switch */ } /* if(Resource_type & 0x80) */ /* * 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 (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 AE_OK * * 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; 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_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 (AE_OK); }