/*
* Interrupt handling assembler and defines for Linux/CRISv10
*/
#ifndef _ASM_ARCH_IRQ_H
#define _ASM_ARCH_IRQ_H
#include <asm/arch/sv_addr_ag.h>
#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, irqvectptr saddr);
void set_break_vector(int n, irqvectptr addr);
#define mask_irq(irq_nr) (*R_VECT_MASK_CLR = 1 << (irq_nr));
#define unmask_irq(irq_nr) (*R_VECT_MASK_SET = 1 << (irq_nr));
#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 $r0,[0xb00000dc]\n\t"
#define IRQ_NAME2(nr) nr##_interrupt(void)
#define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)
#define sIRQ_NAME(nr) IRQ_NAME2(sIRQ##nr)
#define BAD_IRQ_NAME(nr) IRQ_NAME2(bad_IRQ##nr)
/* the asm IRQ handler makes sure the causing IRQ is blocked, then it calls
* do_IRQ (with irq disabled still). after that it unblocks and jumps to
* ret_from_intr (entry.S)
*
* The reason the IRQ is blocked is to allow an sti() before the handler which
* will acknowledge the interrupt is run.
*/
#define BUILD_IRQ(nr,mask) \
void IRQ_NAME(nr); \
void sIRQ_NAME(nr); \
void BAD_IRQ_NAME(nr); \
__asm__ ( \
".text\n\t" \
"IRQ" #nr "_interrupt:\n\t" \
SAVE_ALL \
"sIRQ" #nr "_interrupt:\n\t" /* shortcut for the multiple irq handler */ \
BLOCK_IRQ(mask,nr) /* this must be done to prevent irq loops when we ei later */ \
"moveq "#nr",$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" \
"bad_IRQ" #nr "_interrupt:\n\t" \
"push $r0\n\t" \
BLOCK_IRQ(mask,nr) \
"pop $r0\n\t" \
"reti\n\t" \
"nop\n");
/* This is subtle. The timer interrupt is crucial and it should not be disabled for
* too long. However, if it had been a normal interrupt as per BUILD_IRQ, it would
* have been BLOCK'ed, and then softirq's are run before we return here to UNBLOCK.
* If the softirq's take too much time to run, the timer irq won't run and the
* watchdog will kill us.
*
* Furthermore, if a lot of other irq's occur before we return here, the multiple_irq
* handler is run and it prioritizes the timer interrupt. However if we had BLOCK'ed
* it here, we would not get the multiple_irq at all.
*
* The non-blocking here is based on the knowledge that the timer interrupt is
* registred as a fast interrupt (SA_INTERRUPT) so that we _know_ there will not
* be an sti() before the timer irq handler is run to acknowledge the interrupt.
*/
#define BUILD_TIMER_IRQ(nr,mask) \
void IRQ_NAME(nr); \
void sIRQ_NAME(nr); \
void BAD_IRQ_NAME(nr); \
__asm__ ( \
".text\n\t" \
"IRQ" #nr "_interrupt:\n\t" \
SAVE_ALL \
"sIRQ" #nr "_interrupt:\n\t" /* shortcut for the multiple irq handler */ \
"moveq "#nr",$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" \
"bad_IRQ" #nr "_interrupt:\n\t" \
"push $r0\n\t" \
BLOCK_IRQ(mask,nr) \
"pop $r0\n\t" \
"reti\n\t" \
"nop\n");
#endif
