/******************************************************************************* * * Module Name: rsirq - IRQ resource descriptors * ******************************************************************************/ /* * 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_RESOURCES ACPI_MODULE_NAME("rsirq") /******************************************************************************* * * FUNCTION: acpi_rs_irq_resource * * PARAMETERS: byte_stream_buffer - Pointer to the resource input byte * stream * bytes_consumed - Pointer to where the number of bytes * consumed the byte_stream_buffer is * returned * output_buffer - Pointer to the return data buffer * structure_size - Pointer to where the number of bytes * in the return data struct is returned * * RETURN: Status * * DESCRIPTION: Take the resource byte stream and fill out the appropriate * structure pointed to by the output_buffer. Return the * number of bytes consumed from the byte stream. * ******************************************************************************/ acpi_status acpi_rs_irq_resource(u8 * byte_stream_buffer, acpi_size * bytes_consumed, u8 ** output_buffer, acpi_size * structure_size) { u8 *buffer = byte_stream_buffer; struct acpi_resource *output_struct = (void *)*output_buffer; u16 temp16 = 0; u8 temp8 = 0; u8 index; u8 i; acpi_size struct_size = ACPI_SIZEOF_RESOURCE(struct acpi_resource_irq); ACPI_FUNCTION_TRACE("rs_irq_resource"); /* * The number of bytes consumed are contained in the descriptor * (Bits:0-1) */ temp8 = *buffer; *bytes_consumed = (temp8 & 0x03) + 1; output_struct->id = ACPI_RSTYPE_IRQ; /* Point to the 16-bits of Bytes 1 and 2 */ buffer += 1; ACPI_MOVE_16_TO_16(&temp16, buffer); output_struct->data.irq.number_of_interrupts = 0; /* Decode the IRQ bits */ for (i = 0, index = 0; index < 16; index++) { if ((temp16 >> index) & 0x01) { output_struct->data.irq.interrupts[i] = index; i++; } } /* Zero interrupts is valid */ output_struct->data.irq.number_of_interrupts = i; if (i > 0) { /* Calculate the structure size based upon the number of interrupts */ struct_size += ((acpi_size) i - 1) * 4; } /* Point to Byte 3 if it is used */ if (4 == *bytes_consumed) { buffer += 2; temp8 = *buffer; /* Check for HE, LL interrupts */ switch (temp8 & 0x09) { case 0x01: /* HE */ output_struct->data.irq.edge_level = ACPI_EDGE_SENSITIVE; output_struct->data.irq.active_high_low = ACPI_ACTIVE_HIGH; break; case 0x08: /* LL */ output_struct->data.irq.edge_level = ACPI_LEVEL_SENSITIVE; output_struct->data.irq.active_high_low = ACPI_ACTIVE_LOW; break; default: /* * Only _LL and _HE polarity/trigger interrupts * are allowed (ACPI spec, section "IRQ Format") * so 0x00 and 0x09 are illegal. */ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid interrupt polarity/trigger in resource list, %X\n", temp8)); return_ACPI_STATUS(AE_BAD_DATA); } /* Check for sharable */ output_struct->data.irq.shared_exclusive = (temp8 >> 3) & 0x01; } else { /* * Assume Edge Sensitive, Active High, Non-Sharable * per ACPI Specification */ output_struct->data.irq.edge_level = ACPI_EDGE_SENSITIVE; output_struct->data.irq.active_high_low = ACPI_ACTIVE_HIGH; output_struct->data.irq.shared_exclusive = ACPI_EXCLUSIVE; } /* Set the Length parameter */ output_struct->length = (u32) struct_size; /* Return the final size of the structure */ *structure_size = struct_size; return_ACPI_STATUS(AE_OK); } /******************************************************************************* * * FUNCTION: acpi_rs_irq_stream * * PARAMETERS: linked_list - Pointer to the resource linked list * output_buffer - Pointer to the user's return buffer * bytes_consumed - Pointer to where the number of bytes * used in the output_buffer is returned * * RETURN: Status * * DESCRIPTION: Take the linked list resource structure and fills in the * the appropriate bytes in a byte stream * ******************************************************************************/ acpi_status acpi_rs_irq_stream(struct acpi_resource *linked_list, u8 ** output_buffer, acpi_size * bytes_consumed) { u8 *buffer = *output_buffer; u16 temp16 = 0; u8 temp8 = 0; u8 index; u8 IRqinfo_byte_needed; ACPI_FUNCTION_TRACE("rs_irq_stream"); /* * The descriptor field is set based upon whether a third byte is * needed to contain the IRQ Information. */ if (ACPI_EDGE_SENSITIVE == linked_list->data.irq.edge_level && ACPI_ACTIVE_HIGH == linked_list->data.irq.active_high_low && ACPI_EXCLUSIVE == linked_list->data.irq.shared_exclusive) { *buffer = 0x22; IRqinfo_byte_needed = FALSE; } else { *buffer = 0x23; IRqinfo_byte_needed = TRUE; } buffer += 1; temp16 = 0; /* Loop through all of the interrupts and set the mask bits */ for (index = 0; index < linked_list->data.irq.number_of_interrupts; index++) { temp8 = (u8) linked_list->data.irq.interrupts[index]; temp16 |= 0x1 << temp8; } ACPI_MOVE_16_TO_16(buffer, &temp16); buffer += 2; /* Set the IRQ Info byte if needed. */ if (IRqinfo_byte_needed) { temp8 = 0; temp8 = (u8) ((linked_list->data.irq.shared_exclusive & 0x01) << 4); if (ACPI_LEVEL_SENSITIVE == linked_list->data.irq.edge_level && ACPI_ACTIVE_LOW == linked_list->data.irq.active_high_low) { temp8 |= 0x08; } else { temp8 |= 0x01; } *buffer = temp8; buffer += 1; } /* Return the number of bytes consumed in this operation */ *bytes_consumed = ACPI_PTR_DIFF(buffer, *output_buffer); return_ACPI_STATUS(AE_OK); } /******************************************************************************* * * FUNCTION: acpi_rs_extended_irq_resource * * PARAMETERS: byte_stream_buffer - Pointer to the resource input byte * stream * bytes_consumed - Pointer to where the number of bytes * consumed the byte_stream_buffer is * returned * output_buffer - Pointer to the return data buffer * structure_size - Pointer to where the number of bytes * in the return data struct is returned * * RETURN: Status * * DESCRIPTION: Take the resource byte stream and fill out the appropriate * structure pointed to by the output_buffer. Return the * number of bytes consumed from the byte stream. * ******************************************************************************/ acpi_status acpi_rs_extended_irq_resource(u8 * byte_stream_buffer, acpi_size * bytes_consumed, u8 ** output_buffer, acpi_size * structure_size) { u8 *buffer = byte_stream_buffer; struct acpi_resource *output_struct = (void *)*output_buffer; u16 temp16 = 0; u8 temp8 = 0; u8 *temp_ptr; u8 index; acpi_size struct_size = ACPI_SIZEOF_RESOURCE(struct acpi_resource_ext_irq); ACPI_FUNCTION_TRACE("rs_extended_irq_resource"); /* Get the Descriptor Length field */ buffer += 1; ACPI_MOVE_16_TO_16(&temp16, buffer); /* Validate minimum descriptor length */ if (temp16 < 6) { return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH); } *bytes_consumed = temp16 + 3; output_struct->id = ACPI_RSTYPE_EXT_IRQ; /* Point to the Byte3 */ buffer += 2; temp8 = *buffer; output_struct->data.extended_irq.producer_consumer = temp8 & 0x01; /* * Check for Interrupt Mode * * The definition of an Extended IRQ changed between ACPI spec v1.0b * and ACPI spec 2.0 (section 6.4.3.6 in both). * * - Edge/Level are defined opposite in the table vs the headers */ output_struct->data.extended_irq.edge_level = (temp8 & 0x2) ? ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE; /* Check Interrupt Polarity */ output_struct->data.extended_irq.active_high_low = (temp8 >> 2) & 0x1; /* Check for sharable */ output_struct->data.extended_irq.shared_exclusive = (temp8 >> 3) & 0x01; /* Point to Byte4 (IRQ Table length) */ buffer += 1; temp8 = *buffer; /* Must have at least one IRQ */ if (temp8 < 1) { return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH); } output_struct->data.extended_irq.number_of_interrupts = temp8; /* * Add any additional structure size to properly calculate * the next pointer at the end of this function */ struct_size += (temp8 - 1) * 4; /* Point to Byte5 (First IRQ Number) */ buffer += 1; /* Cycle through every IRQ in the table */ for (index = 0; index < temp8; index++) { ACPI_MOVE_32_TO_32(&output_struct->data.extended_irq. interrupts[index], buffer); /* Point to the next IRQ */ buffer += 4; } /* * This will leave us pointing to the Resource Source Index * If it is present, then save it off and calculate the * pointer to where the null terminated string goes: * Each Interrupt takes 32-bits + the 5 bytes of the * stream that are default. * * Note: Some resource descriptors will have an additional null, so * we add 1 to the length. */ if (*bytes_consumed > ((acpi_size) output_struct->data.extended_irq.number_of_interrupts * 4) + (5 + 1)) { /* Dereference the Index */ temp8 = *buffer; output_struct->data.extended_irq.resource_source.index = (u32) temp8; /* Point to the String */ buffer += 1; /* Point the String pointer to the end of this structure. */ output_struct->data.extended_irq.resource_source.string_ptr = (char *)((char *)output_struct + struct_size); temp_ptr = (u8 *) output_struct->data.extended_irq.resource_source.string_ptr; /* Copy the string into the buffer */ index = 0; while (*buffer) { *temp_ptr = *buffer; temp_ptr += 1; buffer += 1; index += 1; } /* Add the terminating null */ *temp_ptr = 0; output_struct->data.extended_irq.resource_source.string_length = index + 1; /* * In order for the struct_size to fall on a 32-bit boundary, * calculate the length of the string and expand the * struct_size to the next 32-bit boundary. */ temp8 = (u8) (index + 1); struct_size += ACPI_ROUND_UP_to_32_bITS(temp8); } else { output_struct->data.extended_irq.resource_source.index = 0; output_struct->data.extended_irq.resource_source.string_length = 0; output_struct->data.extended_irq.resource_source.string_ptr = NULL; } /* Set the Length parameter */ output_struct->length = (u32) struct_size; /* Return the final size of the structure */ *structure_size = struct_size; return_ACPI_STATUS(AE_OK); } /******************************************************************************* * * FUNCTION: acpi_rs_extended_irq_stream * * PARAMETERS: linked_list - Pointer to the resource linked list * output_buffer - Pointer to the user's return buffer * bytes_consumed - Pointer to where the number of bytes * used in the output_buffer is returned * * RETURN: Status * * DESCRIPTION: Take the linked list resource structure and fills in the * the appropriate bytes in a byte stream * ******************************************************************************/ acpi_status acpi_rs_extended_irq_stream(struct acpi_resource *linked_list, u8 ** output_buffer, acpi_size * bytes_consumed) { u8 *buffer = *output_buffer; u16 *length_field; u8 temp8 = 0; u8 index; ACPI_FUNCTION_TRACE("rs_extended_irq_stream"); /* Set the Descriptor Type field */ *buffer = ACPI_RDESC_TYPE_EXTENDED_XRUPT; buffer += 1; /* Save a pointer to the Length field - to be filled in later */ length_field = ACPI_CAST_PTR(u16, buffer); buffer += 2; /* Set the Interrupt vector flags */ temp8 = (u8) (linked_list->data.extended_irq.producer_consumer & 0x01); temp8 |= ((linked_list->data.extended_irq.shared_exclusive & 0x01) << 3); /* * Set the Interrupt Mode * * The definition of an Extended IRQ changed between ACPI spec v1.0b * and ACPI spec 2.0 (section 6.4.3.6 in both). This code does not * implement the more restrictive definition of 1.0b * * - Edge/Level are defined opposite in the table vs the headers */ if (ACPI_EDGE_SENSITIVE == linked_list->data.extended_irq.edge_level) { temp8 |= 0x2; } /* Set the Interrupt Polarity */ temp8 |= ((linked_list->data.extended_irq.active_high_low & 0x1) << 2); *buffer = temp8; buffer += 1; /* Set the Interrupt table length */ temp8 = (u8) linked_list->data.extended_irq.number_of_interrupts; *buffer = temp8; buffer += 1; for (index = 0; index < linked_list->data.extended_irq.number_of_interrupts; index++) { ACPI_MOVE_32_TO_32(buffer, &linked_list->data.extended_irq. interrupts[index]); buffer += 4; } /* Resource Source Index and Resource Source are optional */ if (0 != linked_list->data.extended_irq.resource_source.string_length) { *buffer = (u8) linked_list->data.extended_irq.resource_source.index; buffer += 1; /* Copy the string */ ACPI_STRCPY((char *)buffer, linked_list->data.extended_irq.resource_source. string_ptr); /* * Buffer needs to be set to the length of the string + one for the * terminating null */ buffer += (acpi_size) (ACPI_STRLEN (linked_list->data.extended_irq. resource_source.string_ptr) + 1); } /* Return the number of bytes consumed in this operation */ *bytes_consumed = ACPI_PTR_DIFF(buffer, *output_buffer); /* * Set the length field to the number of bytes consumed * minus the header size (3 bytes) */ *length_field = (u16) (*bytes_consumed - 3); return_ACPI_STATUS(AE_OK); }