Hi Yanyan,
According to your advice，I modified the avail_p_regs[] in hardware.h file
as tk1. 1 MiB starting from 0x37f0 is reserved for monitor mode.
{ /* .start = */ 0x1000, /* .end = */ 0x37f0}
And then
#define MON_PA_START (0x1000 + 0x27f0)
#define MON_PA_SIZE
Hi Dongxu,
As you can see, the arm_monitor_vector uses PC-relative addressing so that the
code can be moved around in memory. I think ldr pc, =smc_handler breaks this.
Also, please set the NS bit in SCR to 1 before returning.
To reserve a memory region for the monitor-mode code and data, I
Hi Yanyan,
1. It doesn't set the NS bit to 1 in SCR(I just want it to return without
do anything). The arm_monitor_vector and the smc_handler():
arm_monitor_vector:
ldr pc, [pc, #28]
ldr pc, [pc, #24]
ldr pc, =smc_handler
ldr pc, [pc, #16]
ldr pc, [pc, #12]
ldr pc, [pc,
Hi,
The smc_handle() in monitor.S, it does nothing but "movs pc, lr".
Does it set the NS bit to 1 in SCR?
Also, what did you do to ensure that 0x1100 is not used by the kernel?
Could you share the code (if possible) so that I could better understand the
problem.
Regards,
Yanyan
