openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

ARM: dts: sun9i: Add secure SRAM node used for SMP hotplug 

The A80 stores some magic flags in a portion of the secure SRAM. The
BROM jumps directly to the software entry point set by the SMP code
if the flags are set. This is required for CPU0 hotplugging.

Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
This commit is contained in:
Chen-Yu Tsai 2018-01-17 16:46:54 +08:00
parent fd4b0c3340
commit 43f624aa4f
1 changed files with 19 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/arm/boot/dts/sun9i-a80.dtsi
View File

@ -250,6 +250,25 @@ soc {
*/
ranges = <0 0 0 0x20000000>;
sram_b: sram@20000 {
/* 256 KiB secure SRAM at 0x20000 */
compatible = "mmio-sram";
reg = <0x00020000 0x40000>;
#address-cells = <1>;
#size-cells = <1>;
ranges = <0 0x00020000 0x40000>;
smp-sram@1000 {
/*
* This is checked by BROM to determine if
* cpu0 should jump to SMP entry vector
*/
compatible = "allwinner,sun9i-a80-smp-sram";
reg = <0x1000 0x8>;
};
};
ehci0: usb@a00000 {
compatible = "allwinner,sun9i-a80-ehci", "generic-ehci";
reg = <0x00a00000 0x100>;