[linux-sunxi] [PATCH V3: Add Smp support for Allwinner A20. 1/3] Add smp support for Allwinner A20(sunxi 7i).
From: Ben Dooks <hidden>
Date: 2013-09-26 17:03:47
On 22/09/13 15:44, Ian Campbell wrote:
On Sun, 2013-09-22 at 20:21 +0800, Fan Rong wrote:quoted
+ /* Set boot addr */ + paddr = virt_to_phys(sun7i_secondary_startup); + writel(paddr, sunxi7i_cc_base + SUN7I_CPUCFG_BOOTADDR);This means that the secondary cores will miss out on any setup which the bootloader might have done for the primary CPU, e.g. switching to NS HYP mode, setting the CNTFRQ etc. Wouldn't it be better to do all this stuff in the bootloader and either implement PSCI or have the bootloader do the traditional holding pen and mbox address thing?
Out of interest, where is PSCI defined? Does this also mean it is very difficult or impossible to actually power down CPU cores? -- Ben Dooks http://www.codethink.co.uk/ Senior Engineer Codethink - Providing Genius