armv8/gic: Fix GIC v2 initialization

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@arm.com>
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/arch/arm/lib/gic_64.S b/arch/arm/lib/gic_64.S
index a3e18f7..62d0022 100644 (file)
--- 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