diff options
| author | Peng Fan <peng.fan@nxp.com> | 2018-12-12 14:28:56 +0800 |
|---|---|---|
| committer | Peng Fan <peng.fan@nxp.com> | 2018-12-12 15:00:05 +0800 |
| commit | 8132f6b5848d45cab795bb472d6484130985415d (patch) | |
| tree | f5324c67410fef772a4add6c1e78b1e9e4159ad5 /board/freescale | |
| parent | 484104758d3c2f98d3c9ae493f778b1427e2630c (diff) | |
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>
Diffstat (limited to 'board/freescale')
| -rw-r--r-- | board/freescale/imx8qm_mek/imx8qm_mek.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/board/freescale/imx8qm_mek/imx8qm_mek.c b/board/freescale/imx8qm_mek/imx8qm_mek.c index 2efec39736..17979c03e7 100644 --- a/board/freescale/imx8qm_mek/imx8qm_mek.c +++ b/board/freescale/imx8qm_mek/imx8qm_mek.c @@ -67,8 +67,10 @@ int board_early_init_f(void) sc_err_t sciErr = 0; /* When start u-boot in XEN VM, directly return */ - if (IS_ENABLED(CONFIG_XEN)) + if (IS_ENABLED(CONFIG_XEN)) { + writel(0xF53535F5, (void __iomem *)0x80000000); return 0; + } ipcHndl = gd->arch.ipc_channel_handle; @@ -457,8 +459,11 @@ void board_quiesce_devices(void) "dma_lpuart0", }; - if (IS_ENABLED(CONFIG_XEN)) + if (IS_ENABLED(CONFIG_XEN)) { + /* Clear magic number to let xen know uboot is over */ + writel(0x0, (void __iomem *)0x80000000); return; + } power_off_pd_devices(power_on_devices, ARRAY_SIZE(power_on_devices)); } |