/* * Interrupt handling assembler and defines for Linux/CRISv10 */ #ifndef _ASM_ARCH_IRQ_H #define _ASM_ARCH_IRQ_H #include #define NR_IRQS 32 /* The first vector number used for IRQs in v10 is really 0x20 */ /* but all the code and constants are offseted to make 0 the first */ #define FIRST_IRQ 0 #define SOME_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, some) /* 0 ? */ #define NMI_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, nmi) /* 1 */ #define TIMER0_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, timer0) /* 2 */ #define TIMER1_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, timer1) /* 3 */ /* mio, ata, par0, scsi0 on 4 */ /* par1, scsi1 on 5 */ #define NETWORK_STATUS_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, network) /* 6 */ #define SERIAL_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, serial) /* 8 */ #define PA_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, pa) /* 11 */ /* extdma0 and extdma1 is at irq 12 and 13 and/or same as dma5 and dma6 ? */ #define EXTDMA0_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, ext_dma0) #define EXTDMA1_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, ext_dma1) /* dma0-9 is irq 16..25 */ /* 16,17: network */ #define DMA0_TX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma0) #define DMA1_RX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma1) #define NETWORK_DMA_TX_IRQ_NBR DMA0_TX_IRQ_NBR #define NETWORK_DMA_RX_IRQ_NBR DMA1_RX_IRQ_NBR /* 18,19: dma2 and dma3 shared by par0, scsi0, ser2 and ata */ #define DMA2_TX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma2) #define DMA3_RX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma3) #define SER2_DMA_TX_IRQ_NBR DMA2_TX_IRQ_NBR #define SER2_DMA_RX_IRQ_NBR DMA3_RX_IRQ_NBR /* 20,21: dma4 and dma5 shared by par1, scsi1, ser3 and extdma0 */ #define DMA4_TX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma4) #define DMA5_RX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma5) #define SER3_DMA_TX_IRQ_NBR DMA4_TX_IRQ_NBR #define SER3_DMA_RX_IRQ_NBR DMA5_RX_IRQ_NBR /* 22,23: dma6 and dma7 shared by ser0, extdma1 and mem2mem */ #define DMA6_TX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma6) #define DMA7_RX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma7) #define SER0_DMA_TX_IRQ_NBR DMA6_TX_IRQ_NBR #define SER0_DMA_RX_IRQ_NBR DMA7_RX_IRQ_NBR #define MEM2MEM_DMA_TX_IRQ_NBR DMA6_TX_IRQ_NBR #define MEM2MEM_DMA_RX_IRQ_NBR DMA7_RX_IRQ_NBR /* 24,25: dma8 and dma9 shared by ser1 and usb */ #define DMA8_TX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma8) #define DMA9_RX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma9) #define SER1_DMA_TX_IRQ_NBR DMA8_TX_IRQ_NBR #define SER1_DMA_RX_IRQ_NBR DMA9_RX_IRQ_NBR #define USB_DMA_TX_IRQ_NBR DMA8_TX_IRQ_NBR #define USB_DMA_RX_IRQ_NBR DMA9_RX_IRQ_NBR /* usb: controller at irq 31 + uses DMA8 and DMA9 */ #define USB_HC_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, usb) /* our fine, global, etrax irq vector! the pointer lives in the head.S file. */ typedef void (*irqvectptr)(void); struct etrax_interrupt_vector { irqvectptr v[256]; }; extern struct etrax_interrupt_vector *etrax_irv; void set_int_vector(int n, irqvectptr addr); void set_break_vector(int n, irqvectptr addr); #define __STR(x) #x #define STR(x) __STR(x) /* SAVE_ALL saves registers so they match pt_regs */ #define SAVE_ALL \ "move $irp,[$sp=$sp-16]\n\t" /* push instruction pointer and fake SBFS struct */ \ "push $srp\n\t" /* push subroutine return pointer */ \ "push $dccr\n\t" /* push condition codes */ \ "push $mof\n\t" /* push multiply overflow reg */ \ "di\n\t" /* need to disable irq's at this point */\ "subq 14*4,$sp\n\t" /* make room for r0-r13 */ \ "movem $r13,[$sp]\n\t" /* push the r0-r13 registers */ \ "push $r10\n\t" /* push orig_r10 */ \ "clear.d [$sp=$sp-4]\n\t" /* frametype - this is a normal stackframe */ /* BLOCK_IRQ and UNBLOCK_IRQ do the same as mask_irq and unmask_irq */ #define BLOCK_IRQ(mask,nr) \ "move.d " #mask ",$r0\n\t" \ "move.d $r0,[0xb00000d8]\n\t" #define UNBLOCK_IRQ(mask) \ "move.d " #mask ",$r0\n\t" \ "move.d $r0,[0xb00000dc]\n\t" #define IRQ_NAME2(nr) nr##_interrupt(void) #define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr) #define sIRQ_NAME(nr) IRQ_NAME2(sIRQ##nr) #define BAD_IRQ_NAME(nr) IRQ_NAME2(bad_IRQ##nr) /* the asm IRQ handler makes sure the causing IRQ is blocked, then it calls * do_IRQ (with irq disabled still). after that it unblocks and jumps to * ret_from_intr (entry.S) * * The reason the IRQ is blocked is to allow an sti() before the handler which * will acknowledge the interrupt is run. */ #define BUILD_IRQ(nr,mask) \ void IRQ_NAME(nr); \ __asm__ ( \ ".text\n\t" \ "IRQ" #nr "_interrupt:\n\t" \ SAVE_ALL \ BLOCK_IRQ(mask,nr) /* this must be done to prevent irq loops when we ei later */ \ "moveq "#nr",$r10\n\t" \ "move.d $sp,$r11\n\t" \ "jsr do_IRQ\n\t" /* irq.c, r10 and r11 are arguments */ \ UNBLOCK_IRQ(mask) \ "moveq 0,$r9\n\t" /* make ret_from_intr realise we came from an irq */ \ "jump ret_from_intr\n\t"); /* This is subtle. The timer interrupt is crucial and it should not be disabled for * too long. However, if it had been a normal interrupt as per BUILD_IRQ, it would * have been BLOCK'ed, and then softirq's are run before we return here to UNBLOCK. * If the softirq's take too much time to run, the timer irq won't run and the * watchdog will kill us. * * Furthermore, if a lot of other irq's occur before we return here, the multiple_irq * handler is run and it prioritizes the timer interrupt. However if we had BLOCK'ed * it here, we would not get the multiple_irq at all. * * The non-blocking here is based on the knowledge that the timer interrupt is * registred as a fast interrupt (IRQF_DISABLED) so that we _know_ there will not * be an sti() before the timer irq handler is run to acknowledge the interrupt. */ #define BUILD_TIMER_IRQ(nr,mask) \ void IRQ_NAME(nr); \ __asm__ ( \ ".text\n\t" \ "IRQ" #nr "_interrupt:\n\t" \ SAVE_ALL \ "moveq "#nr",$r10\n\t" \ "move.d $sp,$r11\n\t" \ "jsr do_IRQ\n\t" /* irq.c, r10 and r11 are arguments */ \ "moveq 0,$r9\n\t" /* make ret_from_intr realise we came from an irq */ \ "jump ret_from_intr\n\t"); #endif