Default Resource Allocations by SoC - Default Resource Allocations by SoC - 2026.1 English

Default Resource Allocations by SoC - Default Resource Allocations by SoC - 2026.1 English - UG1186

Libmetal and OpenAMP User Guide (UG1186)

Document ID

UG1186

Release Date

2026-06-24

Version

2026.1 English

The following tables show the default memory layout that each platform's OpenAMP overlay uses. All addresses are physical.

Table 1. Zynq UltraScale+ MPSoC `openamp-overlay-zynqmp.yaml`
Region	Address	Size	Notes
Firmware + resource table	`0x09800000`	384 KB (`0x60000`)	Use the combined `rproc0` region.
VRing0 (host to remote)	`0x09860000`	16 KB (`0x4000`)
VRing1 (remote to host)	`0x09864000`	16 KB (`0x4000`)
Shared buffers	`0x09868000`	1 MB (`0x100000`)
Total shared memory		~1.4 MB

Table 2. Zynq UltraScale+ MPSoC `openamp-overlay-zynqmp.yaml`
Property	Value
Host cluster	Use `cpus_a53` with mask `0xf`.
Remote cluster	Use `cpus_r5_0` with core `psu_cortexr5_0`.
Remote OS	Use `freertos`.
Host IPI	Use `ipi_7_to_ipi_1`.
Remote IPI	Use `ipi_1_to_ipi_7`.
TCMs in elfload	Use `psu_r5_0_atcm_global@ffe00000` and `psu_r5_0_btcm_global@ffe20000`.

Table 3. Versal `openamp-overlay-versal.yaml`
Region	Address	Size	Notes
Firmware + Resource Table	`0x09800000`	384 KB (`0x60000`)	Use the combined `rproc0` region.
VRing0	`0x09860000`	16 KB (`0x4000`)
VRing1	`0x09864000`	16 KB (`0x4000`)
Shared Buffers	`0x09868000`	1 MB (`0x100000`)
Total shared memory		~1.4 MB

Table 4. Versal `openamp-overlay-versal.yaml`
Property	Value
Host cluster	Use `cpus_a72` with mask `0x1`.
Remote cluster	Use `cpus_r5_0` with core `psv_cortexr5_0`.
Remote OS	Use `freertos`.
Host IPI	Use `ipi_3_to_ipi_1`.
Remote IPI	Use `ipi_1_to_ipi_3`.
TCMs in elfload	Use `psv_r5_0_atcm_global@ffe00000` and `psv_r5_0_btcm_global@ffe20000`.

Table 5. XCVN3716 `openamp-overlay-versal-net.yaml`
Region	Address	Size	Notes
DDR Boot (firmware)	`0x09800100`	~384 KB (`0x5FF00`)	Use the separate `ddrboot` region.
Resource Table	`0x09800000`	256 B (`0x100`)	Use the separate `rsctbl` region.
VRing0	`0x09860000`	16 KB (`0x4000`)
VRing1	`0x09864000`	16 KB (`0x4000`)
Shared Buffers	`0x09868000`	256 KB (`0x40000`)	This platform reduces the buffer from 1 MB.
Total shared memory		~672 KB

Table 6. XCVN3716 `openamp-overlay-versal-net.yaml`
Property	Value
Host cluster	Use `cpus_a78` with mask `0xff`.
Remote cluster	Use `cpus_r52_0` with core `psx_cortexr52_0`.
Remote OS	Use `zephyr`.
Host IPI	Use `ipi_nobuf3_to_ipi_nobuf1`.
Remote IPI	Use `ipi_nobuf1_to_ipi_nobuf3`.
TCMs in elfload	Use `psx_wizard_0_psxl_0_psx_r52_0a_atcm_global`, `..._btcm_global`, and `..._ctcm_global`.
DDR boot	Set `xlnx,ddr-boot: true` on the remote domain.

Table 7. Versal AI Edge Series Gen 2 VEK385 `openamp-overlay-versal-2ve-2vm.yaml`
Region	Address	Size	Notes
DDR boot (firmware)	`0x09800100`	~384 KB (`0x5FF00`)	Use the separate `ddrboot` region.
Resource table	`0x09800000`	256 B (`0x100`)	Use the separate `rsctbl` region.
VRing0	`0x09860000`	16 KB (`0x4000`)
VRing1	`0x09864000`	16 KB (`0x4000`)
Shared buffers	`0x09868000`	256 KB (`0x40000`)
Total shared memory		~672 KB

Table 8. Domain YAML Property Value Guidance
Property	Value
Host cluster	Use `cpus_a78` with mask `0xff`.
Remote cluster	Use `cpus_r52_0` with core `cortexr52_0`.
Remote OS	Use `zephyr`.
Host IPI	Use `ipi_1_nobuf_to_ipi_2_nobuf`.
Remote IPI	Use `ipi_2_nobuf_to_ipi_1_nobuf`.
TCMs in elfload	Use `r52_0a_atcm_global`, `r52_0a_btcm_global`, and `r52_0a_ctcm_global`.
DDR boot	Set `xlnx,ddr-boot: true` on the remote domain.