[U-Boot] [PATCH 3/3] armv8/gic: Fix GIC v2 initialization
Thierry Reding
thierry.reding at gmail.com
Thu Aug 20 11:52:15 CEST 2015
From: Thierry Reding <treding at nvidia.com>
Initialize all GICD_IGROUPRn registers and set up GICC_CTLR to enable
interrupts to the primary CPU. This fixes issues seen after booting a
Linux kernel from U-Boot.
Suggested-by: Marc Zyngier <marc.zyngier at arm.com>
Suggested-by: Mark Rutland <mark.rutland at arm.com>
Cc: Albert Aribaud <albert.u.boot at aribaud.net>
Cc: Mark Rutland <mark.rutland at arm.com>
Cc: Marc Zyngier <marc.zyngier at arm.com>
Signed-off-by: Thierry Reding <treding at nvidia.com>
---
arch/arm/lib/gic_64.S | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/arch/arm/lib/gic_64.S b/arch/arm/lib/gic_64.S
index a3e18f7713e5..62d0022408bc 100644
--- a/arch/arm/lib/gic_64.S
+++ b/arch/arm/lib/gic_64.S
@@ -46,11 +46,19 @@ ENTRY(gic_init_secure)
ldr w9, [x0, GICD_TYPER]
and w10, w9, #0x1f /* ITLinesNumber */
cbz w10, 1f /* No SPIs */
- add x11, x0, (GICD_IGROUPRn + 4)
+ add x11, x0, GICD_IGROUPRn
mov w9, #~0 /* Config SPIs as Grp1 */
+ str w9, [x11], #0x4
0: str w9, [x11], #0x4
sub w10, w10, #0x1
cbnz w10, 0b
+
+ ldr x1, =GICC_BASE /* GICC_CTLR */
+ mov w0, #3 /* EnableGrp0 | EnableGrp1 */
+ str w0, [x1]
+
+ mov w0, #1 << 7 /* allow NS access to GICC_PMR */
+ str w0, [x1, #4] /* GICC_PMR */
#endif
1:
ret
--
2.4.5
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