In memory of Ben “bushing” Byer, who passed away on Monday, February 8th, 2016.

Hardware/Memory Interface: Difference between revisions

From WiiBrew
Jump to navigation Jump to search
Newer edit →
Marcan (talk | contribs)
Check users, oversight
892 edits
New page: {{Infobox MMIO | ppc = Full | base = 0x0c004000 | len = 0x80 | bits = 16/32 | ppcirq = 7 }} {{hwstub}} {{yagcd}}
 
Trap15 (talk | contribs)
47 edits
Added some basic info from YAGCD
Line 8: Line 8:
{{hwstub}}
{{hwstub}}
{{yagcd}}
{{yagcd}}
Protected memory is always 1 page long (page size is 1024 bytes), and you can specify only 4 protected regions. If the CPU tries to access the protected region in a way that is not allowed, an external interrupt will be raised. Because there are only 4 protected regions, there are a total of 4 possible interrupts which are called MEM_0, MEM_1, MEM_2 and MEM_3.
== Registers ==
{{reg32 | MI_PROT_RGN0 | addr = 0x0C004000 | hifields = 1 | lofields = 1 |
|16  |
|R/W |
|Low 16 bits of protected address ||
|16  |
|R/W |
|High 16 bits of protected address |
|}}
{{reg32 | MI_PROT_RGN1 | addr = 0x0C004004 | hifields = 1 | lofields = 1 |
|16  |
|R/W |
|Low 16 bits of protected address ||
|16  |
|R/W |
|High 16 bits of protected address |
|}}
{{reg32 | MI_PROT_RGN2 | addr = 0x0C004008 | hifields = 1 | lofields = 1 |
|16  |
|R/W |
|Low 16 bits of protected address ||
|16  |
|R/W |
|High 16 bits of protected address |
|}}
{{reg32 | MI_PROT_RGN3 | addr = 0x0C00400C | hifields = 1 | lofields = 1 |
|16  |
|R/W |
|Low 16 bits of protected address ||
|16  |
|R/W |
|High 16 bits of protected address |
|}}
{{reg16 | MI_PROT_TYPE | addr = 0x0C004010 | fields = 5 |
|8 |2  |2  |2  |2  |
|U |R/W |R/W |R/W |R/W |
|  |Ch3 |Ch2 |Ch1 |Ch0 |
|}}
{{regdesc
|ChX|00: Access Denied, 01: Read Only, 10: Write Only, 11: Read/Write
}}

Revision as of 05:27, 6 July 2010

Memory Interface
Access
BroadwayFull
StarletNone
Registers
Base0x0c004000
Length0x80
Access size16/32 bits
Byte orderBig Endian
IRQs
Broadway7
This box: view • talk • edit
This Hardware-related article is a stub. You can help WiiBrew by expanding it.
This article may be improved with information from Yet Another GameCube Documentation. You can help WiiBrew by expanding this article with the information and wikifying it.

Protected memory is always 1 page long (page size is 1024 bytes), and you can specify only 4 protected regions. If the CPU tries to access the protected region in a way that is not allowed, an external interrupt will be raised. Because there are only 4 protected regions, there are a total of 4 possible interrupts which are called MEM_0, MEM_1, MEM_2 and MEM_3.

Registers

MI_PROT_RGN0 (0x0C004000)
  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Access R/W
Field Low 16 bits of protected address
  15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Access R/W
Field High 16 bits of protected address

MI_PROT_RGN1 (0x0C004004)
  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Access R/W
Field Low 16 bits of protected address
  15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Access R/W
Field High 16 bits of protected address

MI_PROT_RGN2 (0x0C004008)
  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Access R/W
Field Low 16 bits of protected address
  15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Access R/W
Field High 16 bits of protected address

MI_PROT_RGN3 (0x0C00400C)
  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Access R/W
Field Low 16 bits of protected address
  15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Access R/W
Field High 16 bits of protected address


MI_PROT_TYPE (0x0C004010)
  15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Access U R/W R/W R/W R/W
Field Ch3 Ch2 Ch1 Ch0
Field Description
ChX 00: Access Denied, 01: Read Only, 10: Write Only, 11: Read/Write
Retrieved from "https://wiibrew.org/w/index.php?title=Hardware/Memory_Interface&oldid=86769"