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no edit summary
FIRMLOAD_EXIT:
FIRMLOAD_EXIT:
Here firmboot() is called, which should never return. The instruction after this bl is a call for panic().
Here firmboot() is called, which should never return. The instruction after this bl is a call for panic().
== Boot11 ==
* ...
main():
LT_1263c();
...
LT_13944()
...
pxi_init();
initializefuncptr_firmboot_start(firmbootbegin_funcptr);
firmboot();
return;
LT_12220/initializefuncptr_firmboot_start
inr0=funcptr
This writes inr0 to address 0x1ffe8028, then returns.
This initializes the funcptr which firmboot() can call after the very first func-call.
LT_13944
if([[I2C_Registers|i2cmcu_readregf]](sp+0)==0)
{
return (*((u8*)0x10147000) >> 4) & 1;//Reads [[GPIO_Registers|GPIO]] when reading I2C fails.
}
Here it basically does "return <byte loaded from sp+0> ^ 0x2". Hence in this case, it will return 0x2 when the system shell is closed(sleep-mode), otherwise 0x0 is returned.
LT_12454/firmboot
This is the arm11 version of the boot9 firmboot() function, like boot9 this is the final function called from main(). The functionality for these two functions are identical, minus addresses.
ptr = firmboot_loadentrypoint11();
funcptr = *(0x1ffe8028);
if(funcptr)funcptr(ptr);
LT_11ffc(ptr);
return;
== Boot Procedure ==
== Boot Procedure ==