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| author | Marc Zyngier <marc.zyngier@arm.com> | 2014-07-12 14:24:05 +0100 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2014-07-28 17:19:26 +0200 |
| commit | 38510a4b34a699a534121ad3cb9096cc0fd7a86e (patch) | |
| tree | ecd164a2156446379570a7fd966cde326d1a813d /arch | |
| parent | ecf07a7930e9e9558bff70698515279f5a2c40d4 (diff) | |
| download | u-boot-imx-38510a4b34a699a534121ad3cb9096cc0fd7a86e.zip u-boot-imx-38510a4b34a699a534121ad3cb9096cc0fd7a86e.tar.gz u-boot-imx-38510a4b34a699a534121ad3cb9096cc0fd7a86e.tar.bz2 | |
ARM: HYP/non-sec: add the option for a second-stage monitor
Allow the switch to a second stage secure monitor just before
switching to non-secure.
This allows a resident piece of firmware to be active once the
kernel has been entered (the u-boot monitor is dead anyway,
its pages being reused).
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/cpu/armv7/nonsec_virt.S | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/arm/cpu/armv7/nonsec_virt.S b/arch/arm/cpu/armv7/nonsec_virt.S index 2a43e3c..745670e 100644 --- a/arch/arm/cpu/armv7/nonsec_virt.S +++ b/arch/arm/cpu/armv7/nonsec_virt.S @@ -44,10 +44,19 @@ _monitor_vectors: * ip: target PC */ _secure_monitor: +#ifdef CONFIG_ARMV7_PSCI + ldr r5, =_psci_vectors @ Switch to the next monitor + mcr p15, 0, r5, c12, c0, 1 + isb + + @ Obtain a secure stack, and configure the PSCI backend + bl psci_arch_init +#endif + mrc p15, 0, r5, c1, c1, 0 @ read SCR - bic r5, r5, #0x4e @ clear IRQ, FIQ, EA, nET bits + bic r5, r5, #0x4a @ clear IRQ, EA, nET bits orr r5, r5, #0x31 @ enable NS, AW, FW bits - + @ FIQ preserved for secure mode mov r6, #SVC_MODE @ default mode is SVC is_cpu_virt_capable r4 #ifdef CONFIG_ARMV7_VIRT |