12 files changed, 129 insertions, 26 deletions

diff --git a/drivers/acpi/resources/rsaddr.c b/drivers/acpi/resources/rsaddr.c
index 271e61509eeb..7f96332822bf 100644
--- a/drivers/acpi/resources/rsaddr.c
+++ b/drivers/acpi/resources/rsaddr.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2007, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/resources/rscalc.c b/drivers/acpi/resources/rscalc.c
index 0dd2ce8a3475..8a112d11d491 100644
--- a/drivers/acpi/resources/rscalc.c
+++ b/drivers/acpi/resources/rscalc.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2007, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -73,7 +73,7 @@ acpi_rs_stream_option_length(u32 resource_length, u32 minimum_total_length);
 
 static u8 acpi_rs_count_set_bits(u16 bit_field)
 {
-        u8 bits_set;
+        acpi_native_uint bits_set;
 
         ACPI_FUNCTION_ENTRY();
 
@@ -81,10 +81,10 @@ static u8 acpi_rs_count_set_bits(u16 bit_field)
 
                 /* Zero the least significant bit that is set */
 
-                bit_field &= (bit_field - 1);
+                bit_field &= (u16) (bit_field - 1);
         }
 
-        return (bits_set);
+        return ((u8) bits_set);
 }
 
 /*******************************************************************************
@@ -211,6 +211,24 @@ acpi_rs_get_aml_length(struct acpi_resource * resource, acpi_size * size_needed)
                  * variable-length fields
                  */
                 switch (resource->type) {
+                case ACPI_RESOURCE_TYPE_IRQ:
+
+                        /* Length can be 3 or 2 */
+
+                        if (resource->data.irq.descriptor_length == 2) {
+                                total_size--;
+                        }
+                        break;
+
+                case ACPI_RESOURCE_TYPE_START_DEPENDENT:
+
+                        /* Length can be 1 or 0 */
+
+                        if (resource->data.irq.descriptor_length == 0) {
+                                total_size--;
+                        }
+                        break;
+
                 case ACPI_RESOURCE_TYPE_VENDOR:
                         /*
                          * Vendor Defined Resource:
diff --git a/drivers/acpi/resources/rscreate.c b/drivers/acpi/resources/rscreate.c
index 50da494c3ee2..faddaee1bc07 100644
--- a/drivers/acpi/resources/rscreate.c
+++ b/drivers/acpi/resources/rscreate.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2007, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/resources/rsdump.c b/drivers/acpi/resources/rsdump.c
index 46da116a4030..6bbbb7b8941a 100644
--- a/drivers/acpi/resources/rsdump.c
+++ b/drivers/acpi/resources/rsdump.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2007, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -87,8 +87,10 @@ acpi_rs_dump_descriptor(void *resource, struct acpi_rsdump_info *table);
  *
  ******************************************************************************/
 
-struct acpi_rsdump_info acpi_rs_dump_irq[6] = {
+struct acpi_rsdump_info acpi_rs_dump_irq[7] = {
         {ACPI_RSD_TITLE, ACPI_RSD_TABLE_SIZE(acpi_rs_dump_irq), "IRQ", NULL},
+        {ACPI_RSD_UINT8, ACPI_RSD_OFFSET(irq.descriptor_length),
+         "Descriptor Length", NULL},
         {ACPI_RSD_1BITFLAG, ACPI_RSD_OFFSET(irq.triggering), "Triggering",
          acpi_gbl_he_decode},
         {ACPI_RSD_1BITFLAG, ACPI_RSD_OFFSET(irq.polarity), "Polarity",
@@ -115,9 +117,11 @@ struct acpi_rsdump_info acpi_rs_dump_dma[6] = {
          NULL}
 };
 
-struct acpi_rsdump_info acpi_rs_dump_start_dpf[3] = {
+struct acpi_rsdump_info acpi_rs_dump_start_dpf[4] = {
         {ACPI_RSD_TITLE, ACPI_RSD_TABLE_SIZE(acpi_rs_dump_start_dpf),
          "Start-Dependent-Functions", NULL},
+        {ACPI_RSD_UINT8, ACPI_RSD_OFFSET(start_dpf.descriptor_length),
+         "Descriptor Length", NULL},
         {ACPI_RSD_2BITFLAG, ACPI_RSD_OFFSET(start_dpf.compatibility_priority),
          "Compatibility Priority", acpi_gbl_config_decode},
         {ACPI_RSD_2BITFLAG, ACPI_RSD_OFFSET(start_dpf.performance_robustness),
diff --git a/drivers/acpi/resources/rsinfo.c b/drivers/acpi/resources/rsinfo.c
index 2c2adb6292c1..3f0a1fedbe0e 100644
--- a/drivers/acpi/resources/rsinfo.c
+++ b/drivers/acpi/resources/rsinfo.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2007, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/resources/rsio.c b/drivers/acpi/resources/rsio.c
index b297bc3e4419..b66d42e7402e 100644
--- a/drivers/acpi/resources/rsio.c
+++ b/drivers/acpi/resources/rsio.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2007, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -185,7 +185,7 @@ struct acpi_rsconvert_info acpi_rs_convert_end_tag[2] = {
  *
  ******************************************************************************/
 
-struct acpi_rsconvert_info acpi_rs_get_start_dpf[5] = {
+struct acpi_rsconvert_info acpi_rs_get_start_dpf[6] = {
         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_START_DEPENDENT,
          ACPI_RS_SIZE(struct acpi_resource_start_dependent),
          ACPI_RSC_TABLE_SIZE(acpi_rs_get_start_dpf)},
@@ -196,6 +196,12 @@ struct acpi_rsconvert_info acpi_rs_get_start_dpf[5] = {
          ACPI_ACCEPTABLE_CONFIGURATION,
          2},
 
+        /* Get the descriptor length (0 or 1 for Start Dpf descriptor) */
+
+        {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.start_dpf.descriptor_length),
+         AML_OFFSET(start_dpf.descriptor_type),
+         0},
+
         /* All done if there is no flag byte present in the descriptor */
 
         {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_AML_LENGTH, 0, 1},
@@ -219,7 +225,9 @@ struct acpi_rsconvert_info acpi_rs_get_start_dpf[5] = {
  *
  ******************************************************************************/
 
-struct acpi_rsconvert_info acpi_rs_set_start_dpf[6] = {
+struct acpi_rsconvert_info acpi_rs_set_start_dpf[10] = {
+        /* Start with a default descriptor of length 1 */
+
         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_START_DEPENDENT,
          sizeof(struct aml_resource_start_dependent),
          ACPI_RSC_TABLE_SIZE(acpi_rs_set_start_dpf)},
@@ -236,6 +244,33 @@ struct acpi_rsconvert_info acpi_rs_set_start_dpf[6] = {
          AML_OFFSET(start_dpf.flags),
          2},
         /*
+         * All done if the output descriptor length is required to be 1
+         * (i.e., optimization to 0 bytes cannot be attempted)
+         */
+        {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
+         ACPI_RS_OFFSET(data.start_dpf.descriptor_length),
+         1},
+
+        /* Set length to 0 bytes (no flags byte) */
+
+        {ACPI_RSC_LENGTH, 0, 0,
+         sizeof(struct aml_resource_start_dependent_noprio)},
+
+        /*
+         * All done if the output descriptor length is required to be 0.
+         *
+         * TBD: Perhaps we should check for error if input flags are not
+         * compatible with a 0-byte descriptor.
+         */
+        {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
+         ACPI_RS_OFFSET(data.start_dpf.descriptor_length),
+         0},
+
+        /* Reset length to 1 byte (descriptor with flags byte) */
+
+        {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_start_dependent)},
+
+        /*
          * All done if flags byte is necessary -- if either priority value
          * is not ACPI_ACCEPTABLE_CONFIGURATION
          */
diff --git a/drivers/acpi/resources/rsirq.c b/drivers/acpi/resources/rsirq.c
index 5657f7b95039..a8805efc0366 100644
--- a/drivers/acpi/resources/rsirq.c
+++ b/drivers/acpi/resources/rsirq.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2007, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -52,7 +52,7 @@ ACPI_MODULE_NAME("rsirq")
  * acpi_rs_get_irq
  *
  ******************************************************************************/
-struct acpi_rsconvert_info acpi_rs_get_irq[7] = {
+struct acpi_rsconvert_info acpi_rs_get_irq[8] = {
         {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_IRQ,
          ACPI_RS_SIZE(struct acpi_resource_irq),
          ACPI_RSC_TABLE_SIZE(acpi_rs_get_irq)},
@@ -69,6 +69,12 @@ struct acpi_rsconvert_info acpi_rs_get_irq[7] = {
          ACPI_EDGE_SENSITIVE,
          1},
 
+        /* Get the descriptor length (2 or 3 for IRQ descriptor) */
+
+        {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.irq.descriptor_length),
+         AML_OFFSET(irq.descriptor_type),
+         0},
+
         /* All done if no flag byte present in descriptor */
 
         {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_AML_LENGTH, 0, 3},
@@ -94,7 +100,9 @@ struct acpi_rsconvert_info acpi_rs_get_irq[7] = {
  *
  ******************************************************************************/
 
-struct acpi_rsconvert_info acpi_rs_set_irq[9] = {
+struct acpi_rsconvert_info acpi_rs_set_irq[13] = {
+        /* Start with a default descriptor of length 3 */
+
         {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_IRQ,
          sizeof(struct aml_resource_irq),
          ACPI_RSC_TABLE_SIZE(acpi_rs_set_irq)},
@@ -105,7 +113,7 @@ struct acpi_rsconvert_info acpi_rs_set_irq[9] = {
          AML_OFFSET(irq.irq_mask),
          ACPI_RS_OFFSET(data.irq.interrupt_count)},
 
-        /* Set the flags byte by default */
+        /* Set the flags byte */
 
         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.triggering),
          AML_OFFSET(irq.flags),
@@ -118,6 +126,33 @@ struct acpi_rsconvert_info acpi_rs_set_irq[9] = {
         {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.sharable),
          AML_OFFSET(irq.flags),
          4},
+
+        /*
+         * All done if the output descriptor length is required to be 3
+         * (i.e., optimization to 2 bytes cannot be attempted)
+         */
+        {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
+         ACPI_RS_OFFSET(data.irq.descriptor_length),
+         3},
+
+        /* Set length to 2 bytes (no flags byte) */
+
+        {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq_noflags)},
+
+        /*
+         * All done if the output descriptor length is required to be 2.
+         *
+         * TBD: Perhaps we should check for error if input flags are not
+         * compatible with a 2-byte descriptor.
+         */
+        {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
+         ACPI_RS_OFFSET(data.irq.descriptor_length),
+         2},
+
+        /* Reset length to 3 bytes (descriptor with flags byte) */
+
+        {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq)},
+
         /*
          * Check if the flags byte is necessary. Not needed if the flags are:
          * ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_HIGH, ACPI_EXCLUSIVE
@@ -134,7 +169,7 @@ struct acpi_rsconvert_info acpi_rs_set_irq[9] = {
          ACPI_RS_OFFSET(data.irq.sharable),
          ACPI_EXCLUSIVE},
 
-        /* irq_no_flags() descriptor can be used */
+        /* We can optimize to a 2-byte irq_no_flags() descriptor */
 
         {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq_noflags)}
 };
diff --git a/drivers/acpi/resources/rslist.c b/drivers/acpi/resources/rslist.c
index ca21e4660c79..b78c7e797a19 100644
--- a/drivers/acpi/resources/rslist.c
+++ b/drivers/acpi/resources/rslist.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2007, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/resources/rsmemory.c b/drivers/acpi/resources/rsmemory.c
index 521eab7dd8df..63b21abd90bb 100644
--- a/drivers/acpi/resources/rsmemory.c
+++ b/drivers/acpi/resources/rsmemory.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2007, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/resources/rsmisc.c b/drivers/acpi/resources/rsmisc.c
index c7081afa893a..de1ac3881b22 100644
--- a/drivers/acpi/resources/rsmisc.c
+++ b/drivers/acpi/resources/rsmisc.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2007, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -497,6 +497,17 @@ acpi_rs_convert_resource_to_aml(struct acpi_resource *resource,
                         }
                         break;
 
+                case ACPI_RSC_EXIT_EQ:
+                        /*
+                         * Control - Exit conversion if equal
+                         */
+                        if (*ACPI_ADD_PTR(u8, resource,
+                                          COMPARE_TARGET(info)) ==
+                            COMPARE_VALUE(info)) {
+                                goto exit;
+                        }
+                        break;
+
                 default:
 
                         ACPI_ERROR((AE_INFO, "Invalid conversion opcode"));
diff --git a/drivers/acpi/resources/rsutils.c b/drivers/acpi/resources/rsutils.c
index 11c0bd7b9cfd..befe2302f41b 100644
--- a/drivers/acpi/resources/rsutils.c
+++ b/drivers/acpi/resources/rsutils.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2007, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -97,17 +97,17 @@ u8 acpi_rs_decode_bitmask(u16 mask, u8 * list)
 u16 acpi_rs_encode_bitmask(u8 * list, u8 count)
 {
         acpi_native_uint i;
-        u16 mask;
+        acpi_native_uint mask;
 
         ACPI_FUNCTION_ENTRY();
 
         /* Encode the list into a single bitmask */
 
         for (i = 0, mask = 0; i < count; i++) {
-                mask |= (0x0001 << list[i]);
+                mask |= (0x1 << list[i]);
         }
 
-        return (mask);
+        return ((u16) mask);
 }
 
 /*******************************************************************************
diff --git a/drivers/acpi/resources/rsxface.c b/drivers/acpi/resources/rsxface.c
index 4c3fd4cdaf73..f59f4c4e034c 100644
--- a/drivers/acpi/resources/rsxface.c
+++ b/drivers/acpi/resources/rsxface.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2007, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without