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SH7785 Datasheet(PDF) 141 Page - Renesas Technology Corp |
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SH7785 Datasheet(HTML) 141 Page - Renesas Technology Corp |
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141 / 1692 page  5. Exception Handling Rev.1.00 Jan. 10, 2008 Page 111 of 1658 REJ09B0261-0100 • 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'0E0 (for a read access) or H'100 (for a write access) 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. For details, see section 7, Memory Management Unit (MMU). Data_address_error() { TEA = EXCEPTION_ADDRESS; PTEH.VPN = PAGE_NUMBER; SPC = PC; SSR = SR; SGR = R15; EXPEVT = read_access? H'0000 00E0: H'0000 0100; SR.MD = 1; SR.RB = 1; SR.BL = 1; PC = VBR + H'0000 0100; } |
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