Difference between revisions of "HIPC"

Revision as of 23:28, 13 April 2017

This is an array of u32's.

Word	Bits	Description
0	19-16	Number of marshalls type X (each: 2 words).
0	23-20	Number of inbufs (each: 3 words). Type mask: 5
0	27-24	Number of outbufs (each: 3 words). Type mask: 6
0	31-28	Number of marshalls type W (each: 3 words)
1	9-0	Size of data portion in u32's.
1	13-10	Marshal type T something.
1	17-14	Marshal type T something.
1	31	Enable special descriptor.
...		Special descriptor, if enabled.
...		Type X descriptors, each one 2 words.
...		Type Y descriptors, each one 3 words.
...		Type Z descriptors, each one 3 words.
...		Type W descriptors, each one 3 words.

There can only be one of this descriptor type. It is enabled by bit31 of the second word.

Word	Bits	Description
0	0	?
0	4-1	Number of A-words for this special descriptor (=x).
0	8-5	Number of B-words for this special descriptor (=y).
1		A-words, purpose unknown.
1+x		B-words, purpose unknown.

They fucked up this one, big time.

Word	Description
0	Lower 32-bits of addr?
1	Upper 16bits: Size, Lower 16bits: Rest of addr?

Word	Description
0	Upper 16bits: Size, Lower 16: ?
1	?

This is an array of u64's placed after the marshall header. But it's always aligned to 16 so sometimes there is padding words inserted inbetween.

Word	Description
0	Magic ("SFCI")
1	Cmd id
...	Non-marshalled data is placed here

Cmd header 1	Cmd header 2	Description
4	9	Data portion size 20.
4	10	Data portion size 24.
4	12	Data portion size 32.
4	14	Data portion size 40.
4	0x8000000C	Marshall words: (u32) 1. Data portion size 32.

@@ Line 7: / Line 7: @@
 | 0 || 19-16 || Number of marshalls type X (each: 2 words).
 |-
-| 0 || 23-20 || Number of marshalls type Y (each: 3 words).
+| 0 || 23-20 || Number of inbufs (each: 3 words). Type mask: 5
 |-
-| 0 || 27-24 || Number of marshalls type Z (each: 3 words).
+| 0 || 27-24 || Number of outbufs (each: 3 words). Type mask: 6
 |-
 | 0 || 31-28 || Number of marshalls type W (each: 3 words)
@@ Line 15: / Line 15: @@
 | 1 || 9-0 || Size of data portion in u32's.
 |-
-| 1 || 13-10 || Marshalls type T something.
+| 1 || 13-10 || Marshal type T something.
 |-
-| 1 || 17-14 || Marshalls type T something.
+| 1 || 17-14 || Marshal type T something.
 |-
 | 1 || 31 || Enable special descriptor.
@@ Line 46: / Line 46: @@
 | 1 || || A-words, purpose unknown.
 |-
-| x || || B-words, purpose unknown.
+| 1+x || || B-words, purpose unknown.
 |}
-=== Descriptor type A ===
+=== Inbuf/outbuf Descriptor ===
+They fucked up this one, big time.
 {| class="wikitable" border="1"
-! Word || Description
+! Word || Bits || Description
+|-
+| 0 || || Lower 32-bits of size.
+|-
+| 1 || || Lower 32-bits of address.
+|-
+| 2 || 1-0 || Unknown flag.
 |-
-| 0 || Word1 is written here.
+| 2 || 4-2 || Bit 38-36 of address.
 |-
-| 1 || Word0 is written here.
+| 2 || 27-24 || Bit 35-32 of size.
 |-
-| 2 || Weird mix.
+| 2 || 31-28 || Bit 35-32 of address.
 |}