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acpi: skip parameters of DefName

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Fixes #415
This commit is contained in:
Alexander Boettcher 2013-08-14 13:34:52 +02:00 committed by Norman Feske
parent a0a91475d1
commit b1fe2b5ab9
1 changed files with 21 additions and 2 deletions
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23
os/src/drivers/acpi/acpi.cc
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@ -353,6 +353,7 @@ class Element : public List<Element>::Element
uint32_t _name_len; /* length of name in bytes */
uint32_t _bdf; /* bus device function */
uint8_t const *_data; /* pointer to the data section */
uint32_t _para_len; /* parameters to be skipped */
bool _valid; /* true if this is a valid element */
bool _routed; /* has the PCI information been read */
List<Pci_routing> *_pci; /* list of PCI routing elements for this element */
@ -366,6 +367,9 @@ class Element : public List<Element>::Element
/* default signature length of ACPI elements */
enum { NAME_LEN = 4 };
/* ComputationalData - ACPI 19.2.3 */
enum { BYTE_PREFIX = 0xa, WORD_PREFIX = 0xb, DWORD_PREFIX = 0xc, QWORD_PREFIX=0xe };
/* return address of 'name' in Element */
uint8_t const *_name_addr() const { return _data + _size_len + 1; }
@ -673,8 +677,8 @@ class Element : public List<Element>::Element
Element(uint8_t const *data = 0, bool package_op4 = false)
:
_type(0), _size(0), _size_len(0), _name(0), _name_len(0), _bdf(0), _data(data),
_valid(false), _routed(false), _pci(0)
_type(0), _size(0), _size_len(0), _name(0), _name_len(0), _bdf(0),
_data(data), _para_len(0), _valid(false), _routed(false), _pci(0)
{
if (!data)
return;
@ -722,6 +726,7 @@ class Element : public List<Element>::Element
}
case DEVICE_NAME:
/* ACPI 19.2.5.1 - NameOp NameString DataRefObject */
if (!(_name_len = _read_name_len()))
return;
@ -734,6 +739,15 @@ class Element : public List<Element>::Element
dump();
/* ACPI 19.2.3 DataRefObject */
switch (data[_name_len + 1]) {
case QWORD_PREFIX: _para_len += 4;
case DWORD_PREFIX: _para_len += 2;
case WORD_PREFIX: _para_len += 1;
case BYTE_PREFIX: _para_len += 1;
default: _para_len += 1;
}
default:
return;
@ -844,6 +858,11 @@ class Element : public List<Element>::Element
/* skip header */
data += e.size_len();
/* skip rest of structure if known */
if (e.is_device_name()) {
data += e._name_len > NAME_LEN ? NAME_LEN : e._name_len;
data += e._para_len;
}
}
parse_bdf();