Samsung S5PC100, User Manual

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DMA CONTROLLER S5PC100 USER’S MANUAL (REV1.0)
6.1-28
4.2 USAGE MODEL
PL330 needs its own binary.
1. Load DMA binary into memory.
2. Use DMA debug SFRs to start DMA controller, PL330.
A. Using debug SFRs
√
DBGCMD, DBGINST0, and DBGINST1 (all write-only)
√
Before writing above three, check DBGSTATUS is not busy.
√
For more information refer to “PL330 TRM, Page.3-37~3-40”.
B. DBGINST0 and DBGINST1 will have debug instructions.
√
These SFRs can receive only three instructions, DMAGO, DMASEV, and DMAKILL.
√
DMAGO starts a channel (For more information refer to “PL330 TRM, P.3-38~3.40 and P.4-6~4.8”).
C. DBGCMD executes the instruction stored in DBGINST0 and 1 SFRs .
Security Scheme
DMA_mem runs on both secure & non-secure mode and DMA_peri runs only on non-secure mode.
1. Channel thread
A. DMA_mem: both secure (ns bit at DMAGO instruction as 0) and non-secure (ns bit at DMAGO instruction
as 1)
B. DMA_peri: just non-secure (ns bit at DMAGO instruction as 1)
2. ASM code
A. For non-secure transaction,
√
Use SP2 and DP2 at DMAMOV instruction.
√
APROT[1] will be 1’b1
B. For secure transaction,
√
Use SP0 and DP0 at DMAMOV instruction.
√
APROT[1] will be 1’b0