Commit 7d7d7a41 authored by Florian Fainelli's avatar Florian Fainelli
Browse files

ARM: vfp: Add vfp_disable for problematic platforms



Some platforms might not be able to fully utilize VFP when e.g: one CPU
out of two in a SMP complex lacks a VFP unit. Adding code to migrate
task to the CPU which has a VFP unit would be cumbersome and not
performant, instead, just add the ability to disable VFP.
Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
parent e7f0f376
......@@ -91,4 +91,8 @@
#define VFPOPDESC_UNUSED_MASK (0xFF << VFPOPDESC_UNUSED_BIT)
#define VFPOPDESC_OPDESC_MASK (~(VFPOPDESC_LENGTH_MASK | VFPOPDESC_UNUSED_MASK))
#ifndef __ASSEMBLY__
void vfp_disable(void);
#endif
#endif /* __ASM_VFP_H */
......@@ -445,6 +445,19 @@ static void vfp_enable(void *unused)
set_copro_access(access | CPACC_FULL(10) | CPACC_FULL(11));
}
/* Called by platforms on which we want to disable VFP because it may not be
* present on all CPUs within a SMP complex. Needs to be called prior to
* vfp_init().
*/
void vfp_disable(void)
{
if (VFP_arch) {
pr_debug("%s: should be called prior to vfp_init\n", __func__);
return;
}
VFP_arch = 1;
}
#ifdef CONFIG_CPU_PM
static int vfp_pm_suspend(void)
{
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment