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Diffstat (limited to 'arch/cris/arch-v10/kernel/irq.c')
-rw-r--r--arch/cris/arch-v10/kernel/irq.c236
1 files changed, 0 insertions, 236 deletions
diff --git a/arch/cris/arch-v10/kernel/irq.c b/arch/cris/arch-v10/kernel/irq.c
deleted file mode 100644
index df11e383acdd..000000000000
--- a/arch/cris/arch-v10/kernel/irq.c
+++ /dev/null
@@ -1,236 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * linux/arch/cris/kernel/irq.c
- *
- * Copyright (c) 2000-2002 Axis Communications AB
- *
- * Authors: Bjorn Wesen (bjornw@axis.com)
- *
- * This file contains the interrupt vectors and some
- * helper functions
- *
- */
-
-#include <asm/irq.h>
-#include <asm/current.h>
-#include <linux/irq.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-
-#define crisv10_mask_irq(irq_nr) (*R_VECT_MASK_CLR = 1 << (irq_nr));
-#define crisv10_unmask_irq(irq_nr) (*R_VECT_MASK_SET = 1 << (irq_nr));
-
-extern void kgdb_init(void);
-extern void breakpoint(void);
-
-/* don't use set_int_vector, it bypasses the linux interrupt handlers. it is
- * global just so that the kernel gdb can use it.
- */
-
-void
-set_int_vector(int n, irqvectptr addr)
-{
- etrax_irv->v[n + 0x20] = (irqvectptr)addr;
-}
-
-/* the breakpoint vector is obviously not made just like the normal irq handlers
- * but needs to contain _code_ to jump to addr.
- *
- * the BREAK n instruction jumps to IBR + n * 8
- */
-
-void
-set_break_vector(int n, irqvectptr addr)
-{
- unsigned short *jinstr = (unsigned short *)&etrax_irv->v[n*2];
- unsigned long *jaddr = (unsigned long *)(jinstr + 1);
-
- /* if you don't know what this does, do not touch it! */
-
- *jinstr = 0x0d3f;
- *jaddr = (unsigned long)addr;
-
- /* 00000026 <clrlop+1a> 3f0d82000000 jump 0x82 */
-}
-
-/*
- * This builds up the IRQ handler stubs using some ugly macros in irq.h
- *
- * These macros create the low-level assembly IRQ routines that do all
- * the operations that are needed. They are also written to be fast - and to
- * disable interrupts as little as humanly possible.
- *
- */
-
-/* IRQ0 and 1 are special traps */
-void hwbreakpoint(void);
-void IRQ1_interrupt(void);
-BUILD_TIMER_IRQ(2, 0x04) /* the timer interrupt is somewhat special */
-BUILD_IRQ(3, 0x08)
-BUILD_IRQ(4, 0x10)
-BUILD_IRQ(5, 0x20)
-BUILD_IRQ(6, 0x40)
-BUILD_IRQ(7, 0x80)
-BUILD_IRQ(8, 0x100)
-BUILD_IRQ(9, 0x200)
-BUILD_IRQ(10, 0x400)
-BUILD_IRQ(11, 0x800)
-BUILD_IRQ(12, 0x1000)
-BUILD_IRQ(13, 0x2000)
-void mmu_bus_fault(void); /* IRQ 14 is the bus fault interrupt */
-void multiple_interrupt(void); /* IRQ 15 is the multiple IRQ interrupt */
-BUILD_IRQ(16, 0x10000 | 0x20000) /* ethernet tx interrupt needs to block rx */
-BUILD_IRQ(17, 0x20000 | 0x10000) /* ...and vice versa */
-BUILD_IRQ(18, 0x40000)
-BUILD_IRQ(19, 0x80000)
-BUILD_IRQ(20, 0x100000)
-BUILD_IRQ(21, 0x200000)
-BUILD_IRQ(22, 0x400000)
-BUILD_IRQ(23, 0x800000)
-BUILD_IRQ(24, 0x1000000)
-BUILD_IRQ(25, 0x2000000)
-/* IRQ 26-30 are reserved */
-BUILD_IRQ(31, 0x80000000)
-
-/*
- * Pointers to the low-level handlers
- */
-
-static void (*interrupt[NR_IRQS])(void) = {
- NULL, NULL, IRQ2_interrupt, IRQ3_interrupt,
- IRQ4_interrupt, IRQ5_interrupt, IRQ6_interrupt, IRQ7_interrupt,
- IRQ8_interrupt, IRQ9_interrupt, IRQ10_interrupt, IRQ11_interrupt,
- IRQ12_interrupt, IRQ13_interrupt, NULL, NULL,
- IRQ16_interrupt, IRQ17_interrupt, IRQ18_interrupt, IRQ19_interrupt,
- IRQ20_interrupt, IRQ21_interrupt, IRQ22_interrupt, IRQ23_interrupt,
- IRQ24_interrupt, IRQ25_interrupt, NULL, NULL, NULL, NULL, NULL,
- IRQ31_interrupt
-};
-
-static void enable_crisv10_irq(struct irq_data *data)
-{
- crisv10_unmask_irq(data->irq);
-}
-
-static void disable_crisv10_irq(struct irq_data *data)
-{
- crisv10_mask_irq(data->irq);
-}
-
-static struct irq_chip crisv10_irq_type = {
- .name = "CRISv10",
- .irq_shutdown = disable_crisv10_irq,
- .irq_enable = enable_crisv10_irq,
- .irq_disable = disable_crisv10_irq,
-};
-
-void weird_irq(void);
-void system_call(void); /* from entry.S */
-void do_sigtrap(void); /* from entry.S */
-void gdb_handle_breakpoint(void); /* from entry.S */
-
-extern void do_IRQ(int irq, struct pt_regs * regs);
-
-/* Handle multiple IRQs */
-void do_multiple_IRQ(struct pt_regs* regs)
-{
- int bit;
- unsigned masked;
- unsigned mask;
- unsigned ethmask = 0;
-
- /* Get interrupts to mask and handle */
- mask = masked = *R_VECT_MASK_RD;
-
- /* Never mask timer IRQ */
- mask &= ~(IO_MASK(R_VECT_MASK_RD, timer0));
-
- /*
- * If either ethernet interrupt (rx or tx) is active then block
- * the other one too. Unblock afterwards also.
- */
- if (mask &
- (IO_STATE(R_VECT_MASK_RD, dma0, active) |
- IO_STATE(R_VECT_MASK_RD, dma1, active))) {
- ethmask = (IO_MASK(R_VECT_MASK_RD, dma0) |
- IO_MASK(R_VECT_MASK_RD, dma1));
- }
-
- /* Block them */
- *R_VECT_MASK_CLR = (mask | ethmask);
-
- /* An extra irq_enter here to prevent softIRQs to run after
- * each do_IRQ. This will decrease the interrupt latency.
- */
- irq_enter();
-
- /* Handle all IRQs */
- for (bit = 2; bit < 32; bit++) {
- if (masked & (1 << bit)) {
- do_IRQ(bit, regs);
- }
- }
-
- /* This irq_exit() will trigger the soft IRQs. */
- irq_exit();
-
- /* Unblock the IRQs again */
- *R_VECT_MASK_SET = (masked | ethmask);
-}
-
-/* init_IRQ() is called by start_kernel and is responsible for fixing IRQ masks and
- setting the irq vector table.
-*/
-
-void __init init_IRQ(void)
-{
- int i;
-
- /* clear all interrupt masks */
- *R_IRQ_MASK0_CLR = 0xffffffff;
- *R_IRQ_MASK1_CLR = 0xffffffff;
- *R_IRQ_MASK2_CLR = 0xffffffff;
- *R_VECT_MASK_CLR = 0xffffffff;
-
- for (i = 0; i < 256; i++)
- etrax_irv->v[i] = weird_irq;
-
- /* Initialize IRQ handler descriptors. */
- for(i = 2; i < NR_IRQS; i++) {
- irq_set_chip_and_handler(i, &crisv10_irq_type,
- handle_simple_irq);
- set_int_vector(i, interrupt[i]);
- }
-
- /* the entries in the break vector contain actual code to be
- executed by the associated break handler, rather than just a jump
- address. therefore we need to setup a default breakpoint handler
- for all breakpoints */
- for (i = 0; i < 16; i++)
- set_break_vector(i, do_sigtrap);
-
- /* except IRQ 15 which is the multiple-IRQ handler on Etrax100 */
- set_int_vector(15, multiple_interrupt);
-
- /* 0 and 1 which are special breakpoint/NMI traps */
- set_int_vector(0, hwbreakpoint);
- set_int_vector(1, IRQ1_interrupt);
-
- /* and irq 14 which is the mmu bus fault handler */
- set_int_vector(14, mmu_bus_fault);
-
- /* setup the system-call trap, which is reached by BREAK 13 */
- set_break_vector(13, system_call);
-
- /* setup a breakpoint handler for debugging used for both user and
- kernel mode debugging (which is why it is not inside an ifdef
- CONFIG_ETRAX_KGDB) */
- set_break_vector(8, gdb_handle_breakpoint);
-
-#ifdef CONFIG_ETRAX_KGDB
- /* setup kgdb if its enabled, and break into the debugger */
- kgdb_init();
- breakpoint();
-#endif
-}