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arm64: gic: Do gicv3 secure initialization based on EL level

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Do gic cpu initialization based on EL level which u-boot enters.
U-Boot can't access EL3 regs when runs in EL2/EL1, etc.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2017-09-07 09:20:32 +02:00
parent 3d80a17712
commit e6149576e8
1 changed files with 9 additions and 7 deletions
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16
arch/arm/lib/gic_64.S
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@ -107,6 +107,8 @@ ENTRY(gic_init_secure_percpu)
mov w11, #0x1 /* Enable SGI 0 */
str w11, [x10, GICR_ISENABLERn]
switch_el x10, 3f, 2f, 1f
3:
/* Initialize Cpu Interface */
mrs x10, ICC_SRE_EL3
orr x10, x10, #0xf /* SRE & Disable IRQ/FIQ Bypass & */
@ -114,19 +116,19 @@ ENTRY(gic_init_secure_percpu)
msr ICC_SRE_EL3, x10
isb
mrs x10, ICC_SRE_EL2
orr x10, x10, #0xf /* SRE & Disable IRQ/FIQ Bypass & */
/* Allow EL1 access to ICC_SRE_EL1 */
msr ICC_SRE_EL2, x10
isb
mov x10, #0x3 /* EnableGrp1NS | EnableGrp1S */
msr ICC_IGRPEN1_EL3, x10
isb
msr ICC_CTLR_EL3, xzr
isb
2:
mrs x10, ICC_SRE_EL2
orr x10, x10, #0xf /* SRE & Disable IRQ/FIQ Bypass & */
/* Allow EL1 access to ICC_SRE_EL1 */
msr ICC_SRE_EL2, x10
isb
1:
msr ICC_CTLR_EL1, xzr /* NonSecure ICC_CTLR_EL1 */
isb