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PoC: Trap when executing from ROM in app mode

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Only allow executing from ROM when in one of the following execution
contexts:
- Firmware mode
- IRQ_SYSCALL_LO
- IRQ_SYSCALL_HI

Co-authored-by: Daniel Jobson <jobson@tillitis.se>
This commit is contained in:
Mikael Ågren 2024-12-11 11:49:41 +01:00
parent cd959e9966
commit 89c77ca4de
No known key found for this signature in database
GPG key ID: E02DA3D397792C46
4 changed files with 48 additions and 11 deletions
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7
hw/application_fpga/rtl/application_fpga.v
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@ -147,11 +147,11 @@ module application_fpga (
reg irq30_cs;
reg irq30_we;
(* keep *)reg irq30_eoi;
reg irq30_eoi;
reg irq31_cs;
reg irq31_we;
(* keep *)reg irq31_eoi;
reg irq31_eoi;
reg tk1_cs;
reg tk1_we;
@ -373,6 +373,9 @@ module application_fpga (
.gpio3(app_gpio3),
.gpio4(app_gpio4),
.access_level_hi (irq31_eoi),
.access_level_med(irq30_eoi),
.cs(tk1_cs),
.we(tk1_we),
.address(tk1_address),