> ## Documentation Index
> Fetch the complete documentation index at: https://dragonwingdocs-staging.qualcomm.com/llms.txt
> Use this file to discover all available pages before exploring further.

# AR Osal Sys ID

> Defines Supported Sub-System IDs.

**Header:** `ar_osal/api/ar_osal_sys_id.h`

## Macros

### `AR_SUB_SYS_ID_INVALID`

Invalid sub system.

```c theme={null}
#define AR_SUB_SYS_ID_INVALID 0
```

### `AR_MODEM_DSP`

Used for MODEM DSP sub system.

```c theme={null}
#define AR_MODEM_DSP 1
```

### `AR_AUDIO_DSP`

Used for ADSP sub system.

```c theme={null}
#define AR_AUDIO_DSP 2
```

### `AR_APSS`

Used for AP sub system.

```c theme={null}
#define AR_APSS 3
```

### `AR_SENSOR_DSP`

Used for SENSOR DSP sub system.

```c theme={null}
#define AR_SENSOR_DSP 4
```

### `AR_COMPUTE_DSP`

Used for COMPUTE DSP sub system.

```c theme={null}
#define AR_COMPUTE_DSP 5
```

### `AR_CC_DSP`

Used for Companion chip DSP (CC\_DSP) sub system.

```c theme={null}
#define AR_CC_DSP 6
```

### `AR_APSS2`

Used for APSS2 sub system.

```c theme={null}
#define AR_APSS2 0xC
```

### `AR_SUB_SYS_ID_FIRST`

First sub system ID.

```c theme={null}
#define AR_SUB_SYS_ID_FIRST AR_MODEM_DSP
```

### `AR_SUB_SYS_ID_LAST`

Last sub system ID.

```c theme={null}
#define AR_SUB_SYS_ID_LAST AR_APSS2
```

### `AR_SUB_SYS_IDS_MASK`

Bit masks representing the subsystem IDs.

```c theme={null}
#define AR_SUB_SYS_IDS_MASK 0x83F
```

### `AR_DEFAULT_DSP`

```c theme={null}
#define AR_DEFAULT_DSP AR_AUDIO_DSP
```