diff options
| author | Yu Chien Peter Lin <[email protected]> | 2023-01-20 11:05:11 +0800 |
|---|---|---|
| committer | Anup Patel <[email protected]> | 2023-01-22 17:33:03 +0530 |
| commit | 787296ae92b7ec5363dab71b6d036e8def31c6f7 (patch) | |
| tree | d7d13ea7fda379ea99cc72cf4b52c95447c91a15 /lib/utils/timer | |
| parent | 9c4eb3521e515603671198295f2c7d5114e4c601 (diff) | |
platform: andes/ae350: Implement hart hotplug using HSM extension
Add hart_start() and hart_stop() callbacks for the multi-core ae350
platform, it utilizes the ATCSMU to put the harts into power-gated
deep sleep mode. The programming sequence is stated as below:
1. Set the wakeup events to PCSm_WE
2. Set the sleep command to PCSm_CTL
3. Set the reset vector to HARTm_RESET_VECTOR_{LO|HI}
4. Write back and invalidate D-cache by executing the CCTL command L1D_WBINVAL_ALL
5. Disable I/D-cache by clearing mcache_ctl.{I|D}C_EN
6. Disable D-cache coherency by clearing mcache_ctl_.DC_COHEN
7. Wait for mcache_ctl.DC_COHSTA to be cleared to ensure the previous step is completed
8. Execute WFI
Signed-off-by: Yu Chien Peter Lin <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Diffstat (limited to 'lib/utils/timer')
0 files changed, 0 insertions, 0 deletions