> ## 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.

# Audio HW Lpm API

> This file contains lpm api for requesting/releasing LPM memory resources for remote client.

**Header:** `spf/api/modules/audio_hw_lpm_api.h`

## Structures

### `lpm_rsc_request_t`

Struct for response for LPM memory request by HLOS

**Members**

<ParamField path="lpm_type" type="uint32_t">
  LPM memory type @values #LPAIF\_CORE\_LPM.
</ParamField>

<ParamField path="size_in_bytes" type="uint32_t">
  Amount of LPM needed in bytes.
</ParamField>

### `lpm_rsp_rsc_request_t`

Struct for response for LPM memory request response by HLOS

**Members**

<ParamField path="lpm_type" type="uint32_t">
  LPM memory type @values #LPAIF\_CORE\_LPM.
</ParamField>

<ParamField path="size_in_bytes" type="uint32_t">
  Amount of LPM allocated in bytes.
</ParamField>

<ParamField path="phy_addr_lsw" type="uint32_t">
  LSW of allocated LPM physical address.
</ParamField>

<ParamField path="phy_addr_msw" type="uint32_t">
  MSW of allocated LPM physical address.
</ParamField>

### `lpm_rsc_release_t`

Struct for LPM memory release by HLOS

**Members**

<ParamField path="lpm_type" type="uint32_t">
  LPM memory type @values #LPAIF\_CORE\_LPM.
</ParamField>

<ParamField path="size_in_bytes" type="uint32_t">
  Amount of LPM to release in bytes.
</ParamField>

<ParamField path="phy_addr_lsw" type="uint32_t">
  LSW of LPM physical address to release.
</ParamField>

<ParamField path="phy_addr_msw" type="uint32_t">
  MSW of LPM physical address to release.
</ParamField>

## Type Definitions

### `lpm_rsc_request_t`

```cpp theme={null}
typedef struct lpm_rsc_request_t lpm_rsc_request_t
```

### `lpm_rsp_rsc_request_t`

```cpp theme={null}
typedef struct lpm_rsp_rsc_request_t lpm_rsp_rsc_request_t
```

### `lpm_rsc_release_t`

```cpp theme={null}
typedef struct lpm_rsc_release_t lpm_rsc_release_t
```

## Macros

### `PARAM_ID_RSC_LOW_PWR_MEM`

Param ID for lpass core This ID should only be used under PRM module instance.

```c theme={null}
#define PARAM_ID_RSC_LOW_PWR_MEM 0x080010CD
```