Commit 02ae8f8df61540c11b84bd16120ead4a72cd4220
1 parent
07dd1b9d69
Exists in
smarc-imx_v2018.03_4.14.78_1.0.0_ga
MLK-20542 imx8qm: xen: mek: add magic number
Write magic number in board early init, and clear magic when booting Linux. This is to let XEN know the current EL1 code is U-Boot or Linux when reset/reboot. This is just a workaround because CM41 could not communicate with XEN now, even XEN knows that EL1 is reseting/rebooting. Signed-off-by: Peng Fan <peng.fan@nxp.com> Reviewed-by: Flynn xu <flynn.xu@nxp.com> (cherry picked from commit 8132f6b5848d45cab795bb472d6484130985415d)
Showing 1 changed file with 7 additions and 2 deletions Side-by-side Diff
board/freescale/imx8qm_mek/imx8qm_mek.c
| ... | ... | @@ -67,8 +67,10 @@ |
| 67 | 67 | sc_err_t sciErr = 0; |
| 68 | 68 | |
| 69 | 69 | /* When start u-boot in XEN VM, directly return */ |
| 70 | - if (IS_ENABLED(CONFIG_XEN)) | |
| 70 | + if (IS_ENABLED(CONFIG_XEN)) { | |
| 71 | + writel(0xF53535F5, (void __iomem *)0x80000000); | |
| 71 | 72 | return 0; |
| 73 | + } | |
| 72 | 74 | |
| 73 | 75 | ipcHndl = gd->arch.ipc_channel_handle; |
| 74 | 76 | |
| 75 | 77 | |
| ... | ... | @@ -457,8 +459,11 @@ |
| 457 | 459 | "dma_lpuart0", |
| 458 | 460 | }; |
| 459 | 461 | |
| 460 | - if (IS_ENABLED(CONFIG_XEN)) | |
| 462 | + if (IS_ENABLED(CONFIG_XEN)) { | |
| 463 | + /* Clear magic number to let xen know uboot is over */ | |
| 464 | + writel(0x0, (void __iomem *)0x80000000); | |
| 461 | 465 | return; |
| 466 | + } | |
| 462 | 467 | |
| 463 | 468 | power_off_pd_devices(power_on_devices, ARRAY_SIZE(power_on_devices)); |
| 464 | 469 | } |