Hi,
On Thu Jun 04, 2015 at 23:56:15 -0400, Reinier Millo Sánchez wrote:
We have adapted the Proc class to support the IRQ on Fiasco.OC when compiling it in TrustZone Normal Side. Following the principle that in TrustZone the IRQ are used on Normal Side and the FIQ are used in Secure Side, we have only used the IRQ when compile the Fiasco.OC with TrustZone Normal Side. By default Fiasco.OC was using the IRQ and FIQ when compiling with TrustZone Normal Side. This is our patch:
True that on normal side only the FIQ is used, but the FIQ state shall not play a role there, as the normal side must not be able to interfere with the secure side. So it shouldn't matter?
Now when we compile Fiasco.OC and run the Hello example for Odroid-X2 using TrustZone Normal Side, it works fine.
Ok good. What is running on the secure side in this case?
We have noted the when is compiled with TrustZone Secure Side, then only use the FIQ, but when try to run it on Odroid-X2 it fails. This is the serial output:
GIC: Switching IRQ 64 to secure GIC: Switching IRQ 79 to secure GIC: Switching IRQ 78 to secure GIC: Switching IRQ 9 to secure GIC: Switching IRQ 8 to secure GIC: Switching IRQ 10 to secure GIC: Switching IRQ 11 to secure
Did you try to figure out where it is stuck?
We are also interested to use Fiasco.OC for ODROID-X2 without TrustZone, in which case we must configure both IRQ and FIQ, but fails. This the serial output:
Is that the 'std' mode? I.e. there's nothing running on the secure side?
Regions of list 'regions' [ 40000000, 400000e3] { e4} Root mbi_rt [ 40001000, 40001aff] { b00} Kern fiasco [ 40002000, 4003afff] { 39000} Kern fiasco [ 40090000, 4009681b] { 681c} Sigma0 sigma0 [ 40098000, 4009e177] { 6178} Sigma0 sigma0 [ 40140000, 4018b4ab] { 4b4ac} Root moe [ 41000000, 4100e4ff] { e500} Boot bootstrap [ 41100000, 41133fff] { 34000} Root Module API Version: (87) experimental Sigma0 config ip:40090100 sp:00000000 Roottask config ip:4014020c sp:00000000 Starting kernel fiasco at 400012c8 Hello from Startup::stage2 Per_cpu_data_alloc: (orig: 0xf002d7a0-0xf002e1a8) Number of IRQs available at this GIC: 160 FPU0: Arch: VFPv3(3), Part: VFPv3(30), r: 4, v: 9, i: 41, t: hard, p: dbl/sngl
KERNEL: Warning: No page-fault handler for 0xee202108, error 0x94000848, pc f002660c
Anyone know what is happening with interrupts in Exynos4412 when TrustZone is not used? Anyone have some idea?
Adam