Hi all, I am working on mpc8260ads reference board. My ethernet is connected on FCC2. I want to use IRQ7 for interrupt handling. There is a file mpc8260_irq.h in Uboot which has " #define SIU_INT_IRQ7 ((uint)0x19) ". There is also another file interrupt.c where it says -

/*************************************************************************** */ /* this section was ripped out of arch/ppc/kernel/ppc8260_pic.c in the */ /* Linux/PPC 2.4.x source. There was no copyright notice in that file. */

/* The 8260 internal interrupt controller. It is usually * the only interrupt controller. * There are two 32-bit registers (high/low) for up to 64 * possible interrupts. * * Now, the fun starts.....Interrupt Numbers DO NOT MAP * in a simple arithmetic fashion to mask or pending registers. * That is, interrupt 4 does not map to bit position 4. * We create two tables, indexed by vector number, to indicate * which register to use and which bit in the register to use. */ static u_char irq_to_siureg[] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

static u_char irq_to_siubit[] = { 31, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 29, 30, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 31, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 };

How are the IRQ numbers being mapped in the above arrays? Please tell me how do i modify the code to use IRQ7 for handling ethernet interrupts? Do i have to write a interrupt sub-routine in fec_init() in ether_fcc.c under the comment " /* 28.9 - (10-12): we don't use ethernet interrupts */"? ************************************************************************** This email (including any attachments) is intended for the sole use of the intended recipient/s and may contain material that is CONFIDENTIAL AND PRIVATE COMPANY INFORMATION. Any review or reliance by others or copying or distribution or forwarding of any or all of the contents in this message is STRICTLY PROHIBITED. If you are not the intended recipient, please contact the sender by email and delete all copies; your cooperation in this regard is appreciated. **************************************************************************