14.12.5 Region Status A
This register is part of a register group (composed of RCTRL, RSTATUS[A,B,C]) that is repeated IDAU_REGION_NUM times. Register group x controls and returns status of the IDAU region x. This register is meaningful only for IDAU region types suffixed _B and _W (static configuration), for other types it always reads 0.
| Symbol | Description | Symbol | Description | Symbol | Description |
|---|---|---|---|---|---|
| R | Readable bit | HC | Cleared by Hardware | (Grey cell) | Unimplemented |
| W | Writable bit | HS | Set by Hardware | X | Bit is unknown at Reset |
| K | Write to clear | S | Software settable bit | — | — |
| Name: | RSTATUSA |
| Offset: | 0x1004 |
| Reset: | 0x00000000 |
| Property: | R |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| MAXSZ[5:0] | |||||||||
| Access | R | R | R | R | R | R | |||
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | |||
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| GRAN[5:0] | |||||||||
| Access | R | R | R | R | R | R | |||
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | |||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| TYPE[3:0] | |||||||||
| Access | R | R | R | R | |||||
| Reset | 0 | 0 | 0 | 0 | |||||
Bits 21:16 – MAXSZ[5:0] Command Argument Maximum Size
MAXSZ defines the maximum valid RCTRL[x].ARG value for this IDAU region. The meaning of this bitfield depends on the IDAU region type (refer to the TYPE bitfield).
_W suffixed types (Watermark based regions): The maximum IDAU region size is (2^(RSTATUSA[x].MAXSZ+RSTATUSA[x].GRAN) - 2^RSTATUSA[x].GRAN) Bytes
_B suffixed types (Block based regions): Maximum number of blocks inside an IDAU region, legal range of values is [1,32].
Bits 13:8 – GRAN[5:0] Region Granularity
_W suffixed types (Watermark based regions): Size in Bytes of one RCTRL[x].ARG LSb.
_B suffixed types (Block based regions): Size in Bytes of a block.
| Value | Name | Description |
|---|---|---|
| 0x0 | GRAN_NA | Not Applicable |
| 0x5 | GRAN_32B | |
| 0x6 | GRAN_64B | |
| 0x7 | GRAN_128B | |
| 0x8 | GRAN_256B | |
| 0x9 | GRAN_512B | |
| 0xA | GRAN_1KB | |
| 0xB | GRAN_2KB | |
| 0xC | GRAN_4KB | |
| 0xD | GRAN_8KB | |
| 0xE | GRAN_16KB | |
| 0xF | GRAN_32KB | |
| 0x10 | GRAN_64KB | |
| 0x11 | GRAN_128KB | |
| 0x12 | GRAN_256KB | |
| 0x13 | GRAN_512KB | |
| 0x14 | GRAN_1MB | |
| 0x15 | GRAN_2MB | |
| 0x16 | GRAN_4MB | |
| 0x17 | GRAN_8MB | |
| 0x18 | GRAN_16MB | |
| 0x19 | GRAN_32MB | |
| 0x1A | GRAN_64MB | |
| 0x1B | GRAN_128MB | |
| 0x1C | GRAN_256MB | |
| 0x1D | GRAN_512MB | |
| 0x1E | GRAN_1GB | |
| 0x1F | GRAN_2GB | |
| 0x20 | GRAN_4GB |
Bits 3:0 – TYPE[3:0] IDAU Region Type
| Value | Name | Description |
|---|---|---|
| 0x0 | INVALID | Region is invalid |
| 0x1 | SEC | Region is secure |
| 0x2 | NONSEC | Region is non secure |
| 0x3 | NONSEC_W | Region is non secure, the associated register group implements a watermark configuration |
| 0x4 | SECnNONSEC_B | Region is either secure or non-secure, the associated register group implements a block configuration |
| 0x5 | SECnNONSEC_L | Region is either secure or non-secure, configuration is linked to another IDAU region configuration bit (the linked configuration bit identification info is readable from the RSTATUSC register inside the same register group) |
| 0x6 | NSC_W | Region is non-secure callable, the associated register group implements a watermark configuration |
| 0x7 | EXEMPT_B | Region is exempt from security, the associated register group implements a block configuration |