2 * Interrupt handling assembler and defines for Linux/CRIS
4 * Copyright (c) 2000, 2001, 2002, 2003 Axis Communications AB
12 * linux/include/asm-cris/irq.h
15 #include <linux/linkage.h>
16 #include <asm/segment.h>
18 #include <asm/sv_addr_ag.h>
21 #define SOME_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, some) /* 0 ? */
22 #define NMI_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, nmi) /* 1 */
23 #define TIMER0_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, timer0) /* 2 */
24 #define TIMER1_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, timer1) /* 3 */
25 /* mio, ata, par0, scsi0 on 4 */
26 /* par1, scsi1 on 5 */
27 #define NETWORK_STATUS_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, network) /* 6 */
29 #define SERIAL_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, serial) /* 8 */
30 #define PA_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, pa) /* 11 */
31 /* extdma0 and extdma1 is at irq 12 and 13 and/or same as dma5 and dma6 ? */
32 #define EXTDMA0_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, ext_dma0)
33 #define EXTDMA1_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, ext_dma1)
35 #define BUS_FAULT_IRQ_NBR 14
36 #define MULTIPLE_IRQ_NBR 15
38 /* dma0-9 is irq 16..25 */
40 #define DMA0_TX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma0)
41 #define DMA1_RX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma1)
42 #define NETWORK_DMA_TX_IRQ_NBR DMA0_TX_IRQ_NBR
43 #define NETWORK_DMA_RX_IRQ_NBR DMA1_RX_IRQ_NBR
45 /* 18,19: dma2 and dma3 shared by par0, scsi0, ser2 and ata */
46 #define DMA2_TX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma2)
47 #define DMA3_RX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma3)
48 #define SER2_DMA_TX_IRQ_NBR DMA2_TX_IRQ_NBR
49 #define SER2_DMA_RX_IRQ_NBR DMA3_RX_IRQ_NBR
51 /* 20,21: dma4 and dma5 shared by par1, scsi1, ser3 and extdma0 */
52 #define DMA4_TX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma4)
53 #define DMA5_RX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma5)
54 #define SER3_DMA_TX_IRQ_NBR DMA4_TX_IRQ_NBR
55 #define SER3_DMA_RX_IRQ_NBR DMA5_RX_IRQ_NBR
57 /* 22,23: dma6 and dma7 shared by ser0, extdma1 and mem2mem */
58 #define DMA6_TX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma6)
59 #define DMA7_RX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma7)
60 #define SER0_DMA_TX_IRQ_NBR DMA6_TX_IRQ_NBR
61 #define SER0_DMA_RX_IRQ_NBR DMA7_RX_IRQ_NBR
62 #define MEM2MEM_DMA_TX_IRQ_NBR DMA6_TX_IRQ_NBR
63 #define MEM2MEM_DMA_RX_IRQ_NBR DMA7_RX_IRQ_NBR
65 /* 24,25: dma8 and dma9 shared by ser1 and usb */
66 #define DMA8_TX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma8)
67 #define DMA9_RX_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, dma9)
68 #define SER1_DMA_TX_IRQ_NBR DMA8_TX_IRQ_NBR
69 #define SER1_DMA_RX_IRQ_NBR DMA9_RX_IRQ_NBR
70 #define USB_DMA_TX_IRQ_NBR DMA8_TX_IRQ_NBR
71 #define USB_DMA_RX_IRQ_NBR DMA9_RX_IRQ_NBR
73 /* usb: controller at irq 31 + uses DMA8 and DMA9 */
74 #define USB_HC_IRQ_NBR IO_BITNR(R_VECT_MASK_RD, usb)
77 extern void disable_irq(unsigned int);
78 extern void enable_irq(unsigned int);
80 #define disable_irq_nosync disable_irq
81 #define enable_irq_nosync enable_irq
83 /* our fine, global, etrax irq vector! the pointer lives in the head.S file. */
85 typedef void (*irqvectptr)(void);
87 struct etrax_interrupt_vector {
91 extern struct etrax_interrupt_vector *etrax_irv;
92 void set_int_vector(int n, irqvectptr addr, irqvectptr saddr);
93 void set_break_vector(int n, irqvectptr addr);
96 #define STR(x) __STR(x)
98 /* SAVE_ALL saves registers so they match pt_regs */
101 "move $irp,[$sp=$sp-16]\n\t" /* push instruction pointer and fake SBFS struct */ \
102 "push $srp\n\t" /* push subroutine return pointer */ \
103 "push $dccr\n\t" /* push condition codes */ \
104 "push $mof\n\t" /* push multiply overflow reg */ \
105 "di\n\t" /* need to disable irq's at this point */\
106 "subq 14*4,$sp\n\t" /* make room for r0-r13 */ \
107 "movem $r13,[$sp]\n\t" /* push the r0-r13 registers */ \
108 "push $r10\n\t" /* push orig_r10 */ \
109 "clear.d [$sp=$sp-4]\n\t" /* frametype - this is a normal stackframe */
111 /* BLOCK_IRQ and UNBLOCK_IRQ do the same as mask_irq and unmask_irq in irq.c */
113 #define BLOCK_IRQ(mask,nr) \
114 "move.d " #mask ",$r0\n\t" \
115 "move.d $r0,[0xb00000d8]\n\t"
117 #define UNBLOCK_IRQ(mask) \
118 "move.d " #mask ",$r0\n\t" \
119 "move.d $r0,[0xb00000dc]\n\t"
121 #define IRQ_NAME2(nr) nr##_interrupt(void)
122 #define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)
123 #define sIRQ_NAME(nr) IRQ_NAME2(sIRQ##nr)
124 #define BAD_IRQ_NAME(nr) IRQ_NAME2(bad_IRQ##nr)
126 /* the asm IRQ handler makes sure the causing IRQ is blocked, then it calls
127 * do_IRQ (with irq disabled still). after that it unblocks and jumps to
128 * ret_from_intr (entry.S)
130 * The reason the IRQ is blocked is to allow an sti() before the handler which
131 * will acknowledge the interrupt is run.
134 #define BUILD_IRQ(nr,mask) \
136 void sIRQ_NAME(nr); \
137 void BAD_IRQ_NAME(nr); \
140 "IRQ" #nr "_interrupt:\n\t" \
142 "sIRQ" #nr "_interrupt:\n\t" /* shortcut for the multiple irq handler */ \
143 BLOCK_IRQ(mask,nr) /* this must be done to prevent irq loops when we ei later */ \
144 "moveq "#nr",$r10\n\t" \
145 "move.d $sp,$r11\n\t" \
146 "jsr do_IRQ\n\t" /* irq.c, r10 and r11 are arguments */ \
148 "moveq 0,$r9\n\t" /* make ret_from_intr realise we came from an irq */ \
149 "jump ret_from_intr\n\t" \
150 "bad_IRQ" #nr "_interrupt:\n\t" \
157 /* This is subtle. The timer interrupt is crucial and it should not be disabled
158 * for too long. However, if it had been a normal interrupt as per BUILD_IRQ,
159 * it would have been BLOCK'ed, and then softirq's are run before we return
160 * here to UNBLOCK. If the softirq's take too much time to run, the timer irq
161 * won't run and the watchdog will kill us.
163 * Furthermore, if a lot of other irq's occur before we return here, the
164 * multiple_irq handler is run and it prioritizes the timer interrupt. However
165 * if we had BLOCK'ed it here, we would not get the multiple_irq at all.
167 * The non-blocking here is based on the knowledge that the timer interrupt is
168 * registred as a fast interrupt (SA_INTERRUPT) so that we _know_ there will
169 * not be an sti() before the timer irq handler is run to acknowledge the
173 #define BUILD_TIMER_IRQ(nr,mask) \
175 void sIRQ_NAME(nr); \
176 void BAD_IRQ_NAME(nr); \
179 "IRQ" #nr "_interrupt:\n\t" \
181 "sIRQ" #nr "_interrupt:\n\t" /* shortcut for the multiple irq handler */ \
182 "moveq "#nr",$r10\n\t" \
183 "move.d $sp,$r11\n\t" \
184 "jsr do_IRQ\n\t" /* irq.c, r10 and r11 are arguments */ \
185 "moveq 0,$r9\n\t" /* make ret_from_intr realise we came from an irq */ \
186 "jump ret_from_intr\n\t" \
187 "bad_IRQ" #nr "_interrupt:\n\t" \
194 #endif /* _ASM_IRQ_H */