Hitachi SH7751 Hardware Manual page 177

(5) Instruction TLB Protection Violation Exception


Source: The access does not accord with the ITLB protection information (PR bits) shown
below.
PR Privileged Mode
0 Access possible
1 Access possible


Transition address: VBR + H'0000 0100


Transition operations:
The virtual address (32 bits) at which this exception occurred is set in TEA, and the
corresponding virtual page number (22 bits) is set in PTEH [31:10]. ASID in PTEH indicates
the ASID when this exception occurred.
The PC and SR contents for the instruction at which this exception occurred are saved in SPC
and SSR. The R15 contents at this time are saved in SGR.
Exception code H'0A0 is set in EXPEVT. The BL, MD, and RB bits are set to 1 in SR, and a
branch is made to PC = VBR + H'0100.
ITLB_protection_violation_exception()
{
TEA = EXCEPTION_ADDRESS;
PTEH.VPN = PAGE_NUMBER;
SPC = PC;
SSR = SR;
SGR = R15;
EXPEVT = H'000000A0;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + H'00000100;
}
Rev. 3.0, 04/02, page 138 of 1064
User Mode
Access not possible
Access possible