[ACPI] ACPICA 20041210 from Bob Moore

ACPI 3.0 support is nearing completion in both the iASL
compiler and the ACPI CA core subsystem.

Fixed a problem in the ToDecimalString operator where the
resulting string length was incorrectly calculated. The
length is now calculated exactly, eliminating incorrect
AE_STRING_LIMIT exceptions.

Fixed a problem in the ToHexString operator to allow a
maximum 200 character string to be produced.

Fixed a problem in the internal string-to-buffer and
buffer-to-buffer copy routine where the length of the
resulting buffer was not truncated to the new size (if
the target buffer already existed).
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/executer/exconvrt.c

@@ -399,9 +399,9 @@ acpi_ex_convert_to_string (
 {
 	union acpi_operand_object       *return_desc;
 	u8                              *new_buf;
+	u32                             i;
 	u32                             string_length = 0;
 	u16                             base = 16;
-	u32                             i;
 	u8                              separator = ',';
 
 
@@ -461,6 +461,8 @@ acpi_ex_convert_to_string (
 
 	case ACPI_TYPE_BUFFER:
 
+		/* Setup string length, base, and separator */
+
 		switch (type) {
 		case ACPI_EXPLICIT_CONVERT_DECIMAL: /* Used by to_decimal_string operator */
 			/*
@@ -468,9 +470,23 @@ acpi_ex_convert_to_string (
 			 * decimal values separated by commas."
 			 */
 			base = 10;
-			string_length = obj_desc->buffer.length; /* 4 chars for each decimal */
 
-			/*lint -fallthrough */
+			/*
+			 * Calculate the final string length.  Individual string values
+			 * are variable length (include separator for each)
+			 */
+			for (i = 0; i < obj_desc->buffer.length; i++) {
+				if (obj_desc->buffer.pointer[i] >= 100) {
+					string_length += 4;
+				}
+				else if (obj_desc->buffer.pointer[i] >= 10) {
+					string_length += 3;
+				}
+				else {
+					string_length += 2;
+				}
+			}
+			break;
 
 		case ACPI_IMPLICIT_CONVERT_HEX:
 			/*
@@ -478,25 +494,35 @@ acpi_ex_convert_to_string (
 			 *"The entire contents of the buffer are converted to a string of
 			 * two-character hexadecimal numbers, each separated by a space."
 			 */
-			if (type == ACPI_IMPLICIT_CONVERT_HEX) {
 			separator = ' ';
-			}
-
-			/*lint -fallthrough */
+			string_length = (obj_desc->buffer.length * 3);
+			break;
 
 		case ACPI_EXPLICIT_CONVERT_HEX:     /* Used by to_hex_string operator */
 			/*
 			 * From ACPI: "If Data is a buffer, it is converted to a string of
 			 * hexadecimal values separated by commas."
 			 */
-			string_length += (obj_desc->buffer.length * 3);
+			string_length = (obj_desc->buffer.length * 3);
+			break;
+
+		default:
+			return_ACPI_STATUS (AE_BAD_PARAMETER);
+		}
+
+		/*
+		 * Perform the conversion.
+		 * (-1 because of extra separator included in string_length from above)
+		 */
+		string_length--;
 		if (string_length > ACPI_MAX_STRING_CONVERSION) /* ACPI limit */ {
 			return_ACPI_STATUS (AE_AML_STRING_LIMIT);
 		}
 
-			/* Create a new string object and string buffer */
-
-			return_desc = acpi_ut_create_string_object ((acpi_size) string_length -1);
+		/*
+		 * Create a new string object and string buffer
+		 */
+		return_desc = acpi_ut_create_string_object ((acpi_size) string_length);
 		if (!return_desc) {
 			return_ACPI_STATUS (AE_NO_MEMORY);
 		}
@@ -505,7 +531,7 @@ acpi_ex_convert_to_string (
 
 		/*
 		 * Convert buffer bytes to hex or decimal values
-			 * (separated by commas)
+		 * (separated by commas or spaces)
 		 */
 		for (i = 0; i < obj_desc->buffer.length; i++) {
 			new_buf += acpi_ex_convert_to_ascii (
@@ -514,20 +540,10 @@ acpi_ex_convert_to_string (
 			*new_buf++ = separator; /* each separated by a comma or space */
 		}
 
-			/* Null terminate the string (overwrites final comma from above) */
+		/* Null terminate the string (overwrites final comma/space from above) */
 
 		new_buf--;
 		*new_buf = 0;
-
-			/* Recalculate length */
-
-			return_desc->string.length = (u32)
-				ACPI_STRLEN (return_desc->string.pointer);
-			break;
-
-		default:
-			return_ACPI_STATUS (AE_BAD_PARAMETER);
-		}
 		break;
 
 	default:

drivers/acpi/executer/exstorob.c

@@ -93,34 +93,35 @@ acpi_ex_store_buffer_to_buffer (
 			return_ACPI_STATUS (AE_NO_MEMORY);
 		}
 
-		target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER;
 		target_desc->buffer.length = length;
 	}
 
-	/*
-	 * Buffer is a static allocation,
-	 * only place what will fit in the buffer.
-	 */
+	/* Copy source buffer to target buffer */
+
 	if (length <= target_desc->buffer.length) {
 		/* Clear existing buffer and copy in the new one */
 
 		ACPI_MEMSET (target_desc->buffer.pointer, 0, target_desc->buffer.length);
 		ACPI_MEMCPY (target_desc->buffer.pointer, buffer, length);
+
+		/* Set the new length of the target */
+
+		target_desc->buffer.length = length;
 	}
 	else {
-		/*
-		 * Truncate the source, copy only what will fit
-		 */
+		/* Truncate the source, copy only what will fit */
+
 		ACPI_MEMCPY (target_desc->buffer.pointer, buffer, target_desc->buffer.length);
 
 		ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
-			"Truncating src buffer from %X to %X\n",
+			"Truncating source buffer from %X to %X\n",
 			length, target_desc->buffer.length));
 	}
 
 	/* Copy flags */
 
 	target_desc->buffer.flags = source_desc->buffer.flags;
+	target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER;
 	return_ACPI_STATUS (AE_OK);
 }
 

drivers/acpi/tables/tbconvrt.c

@@ -187,7 +187,7 @@ acpi_tb_init_generic_address (
 	new_gas_struct->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO;
 	new_gas_struct->register_bit_width = register_bit_width;
 	new_gas_struct->register_bit_offset = 0;
-	new_gas_struct->reserved        = 0;
+	new_gas_struct->access_width    = 0;
 }
 
 
@@ -503,7 +503,7 @@ acpi_tb_convert_table_fadt (void)
  *
  * FUNCTION:    acpi_tb_convert_table_facs
  *
- * PARAMETERS:  table_info      - Info for currently installad FACS
+ * PARAMETERS:  table_info      - Info for currently installed FACS
  *
  * RETURN:      Status
  *

include/acpi/acconfig.h

@@ -64,7 +64,7 @@
 
 /* Version string */
 
-#define ACPI_CA_VERSION                 0x20041203
+#define ACPI_CA_VERSION                 0x20041210
 
 /*
  * OS name, used for the _OS object.  The _OS object is essentially obsolete,
@@ -99,7 +99,7 @@
 
 /* Version of ACPI supported */
 
-#define ACPI_CA_SUPPORT_LEVEL           2
+#define ACPI_CA_SUPPORT_LEVEL           3
 
 /* String size constants */
 

include/acpi/acdisasm.h

@@ -316,6 +316,12 @@ acpi_dm_dword_descriptor (
 	u32                             length,
 	u32                             level);
 
+void
+acpi_dm_extended_descriptor (
+	struct asl_extended_address_desc   *resource,
+	u32                             length,
+	u32                             level);
+
 void
 acpi_dm_qword_descriptor (
 	struct asl_qword_address_desc   *resource,

include/acpi/aclocal.h

@@ -862,7 +862,6 @@ struct acpi_bit_register_info
 /*
  * Large resource descriptor types
  */
-
 #define ACPI_RDESC_TYPE_MEMORY_24               0x81
 #define ACPI_RDESC_TYPE_GENERAL_REGISTER        0x82
 #define ACPI_RDESC_TYPE_LARGE_VENDOR            0x84
@@ -872,6 +871,7 @@ struct acpi_bit_register_info
 #define ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE      0x88
 #define ACPI_RDESC_TYPE_EXTENDED_XRUPT          0x89
 #define ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE     0x8A
+#define ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE  0x8B
 
 
 /*****************************************************************************

include/acpi/actbl2.h

@@ -115,7 +115,7 @@ struct acpi_generic_address
 	u8                              address_space_id;       /* Address space where struct or register exists. */
 	u8                              register_bit_width;     /* Size in bits of given register */
 	u8                              register_bit_offset;    /* Bit offset within the register */
-	u8                              reserved;               /* Must be 0 */
+	u8                              access_width;           /* Minimum Access size (ACPI 3.0) */
 	u64                             address;                /* 64-bit address of struct or register */
 };
 

include/acpi/amlresrc.h

@@ -50,6 +50,8 @@
 #define ASL_RESNAME_ADDRESS                     "_ADR"
 #define ASL_RESNAME_ALIGNMENT                   "_ALN"
 #define ASL_RESNAME_ADDRESSSPACE                "_ASI"
+#define ASL_RESNAME_ACCESSSIZE                  "_ASZ"
+#define ASL_RESNAME_TYPESPECIFICATTRIBUTES      "_ATT"
 #define ASL_RESNAME_BASEADDRESS                 "_BAS"
 #define ASL_RESNAME_BUSMASTER                   "_BM_"  /* Master(1), Slave(0) */
 #define ASL_RESNAME_DECODE                      "_DEC"
@@ -223,6 +225,27 @@ struct asl_fixed_memory_32_desc
 };
 
 
+struct asl_extended_address_desc
+{
+	u8                                  descriptor_type;
+	u16                                 length;
+	u8                                  resource_type;
+	u8                                  flags;
+	u8                                  specific_flags;
+	u8                                  revision_iD;
+	u8                                  reserved;
+	u64                                 granularity;
+	u64                                 address_min;
+	u64                                 address_max;
+	u64                                 translation_offset;
+	u64                                 address_length;
+	u64                                 type_specific_attributes;
+	u8                                  optional_fields[2]; /* Used for length calculation only */
+};
+
+#define ASL_EXTENDED_ADDRESS_DESC_REVISION          1       /* ACPI 3.0 */
+
+
 struct asl_qword_address_desc
 {
 	u8                                  descriptor_type;
@@ -289,7 +312,7 @@ struct asl_general_register_desc
 	u8                                  address_space_id;
 	u8                                  bit_width;
 	u8                                  bit_offset;
-	u8                                  reserved;
+	u8                                  access_size; /* ACPI 3.0, was Reserved */
 	u64                                 address;
 };
 
@@ -317,6 +340,7 @@ union asl_resource_desc
 	struct asl_qword_address_desc       qas;
 	struct asl_dword_address_desc       das;
 	struct asl_word_address_desc        was;
+	struct asl_extended_address_desc    eas;
 	struct asl_extended_xrupt_desc      exx;
 	struct asl_general_register_desc    grg;
 	u32                                 u32_item;