| Message ID | 1436370014-3725-1-git-send-email-vitalya@ti.com |
|---|---|
| State | Accepted |
| Delegated to: | Tom Rini |
| Headers | show |
On Wed, Jul 08, 2015 at 11:40:14AM -0400, Vitaly Andrianov wrote: > When core A turning of core B, via tetris DPSC it places the core > B DPSC into transitional state. The core B has to execute wfi instruction > to move its DPSC to the OFF state. This patch add such instruction. > > Signed-off-by: Vitaly Andrianov <vitalya@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com>
On Wed, Jul 08, 2015 at 11:40:14AM -0400, Vitaly Andrianov wrote: > When core A turning of core B, via tetris DPSC it places the core > B DPSC into transitional state. The core B has to execute wfi instruction > to move its DPSC to the OFF state. This patch add such instruction. > > Signed-off-by: Vitaly Andrianov <vitalya@ti.com> > Reviewed-by: Tom Rini <trini@konsulko.com> Applied to u-boot/master, thanks!
diff --git a/arch/arm/mach-keystone/cmd_mon.c b/arch/arm/mach-keystone/cmd_mon.c index f9f58a3..73ceb83 100644 --- a/arch/arm/mach-keystone/cmd_mon.c +++ b/arch/arm/mach-keystone/cmd_mon.c @@ -55,8 +55,13 @@ U_BOOT_CMD(mon_install, 2, 0, do_mon_install, static void core_spin(void) { - while (1) - ; /* forever */; + while (1) { + asm volatile ( + "dsb\n" + "isb\n" + "wfi\n" + ); + } } int mon_power_on(int core_id, void *ep)
When core A turning of core B, via tetris DPSC it places the core B DPSC into transitional state. The core B has to execute wfi instruction to move its DPSC to the OFF state. This patch add such instruction. Signed-off-by: Vitaly Andrianov <vitalya@ti.com> --- arch/arm/mach-keystone/cmd_mon.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)