diff options
Diffstat (limited to 'target/linux/rb532/files/arch/mips/rb500/irq.c')
| -rw-r--r-- | target/linux/rb532/files/arch/mips/rb500/irq.c | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/target/linux/rb532/files/arch/mips/rb500/irq.c b/target/linux/rb532/files/arch/mips/rb500/irq.c deleted file mode 100644 index 5a4d349d49..0000000000 --- a/target/linux/rb532/files/arch/mips/rb500/irq.c +++ /dev/null @@ -1,265 +0,0 @@ -/* - * BRIEF MODULE DESCRIPTION - * RC32434 interrupt routines. - * - * Copyright 2002 MontaVista Software Inc. - * Author: MontaVista Software, Inc. - * stevel@mvista.com or source@mvista.com - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN - * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF - * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON - * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/kernel_stat.h> -#include <linux/module.h> -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/types.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/timex.h> -#include <linux/slab.h> -#include <linux/random.h> -#include <linux/delay.h> - -#include <asm/bitops.h> -#include <asm/bootinfo.h> -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/time.h> -#include <asm/mipsregs.h> -#include <asm/system.h> -#include <asm/rc32434/rc32434.h> -#include <asm/rc32434/gpio.h> - -extern void set_debug_traps(void); -extern irq_cpustat_t irq_stat [NR_CPUS]; -unsigned int local_bh_count[NR_CPUS]; -unsigned int local_irq_count[NR_CPUS]; - -static unsigned int startup_irq(unsigned int irq); -static void rb500_end_irq(unsigned int irq_nr); -static void mask_and_ack_irq(unsigned int irq_nr); -static void rb500_enable_irq(unsigned int irq_nr); -static void rb500_disable_irq(unsigned int irq_nr); - -extern void __init init_generic_irq(void); -extern struct rb500_gpio_reg __iomem *rb500_gpio_reg0; - -typedef struct { - u32 mask; /* mask of valid bits in pending/mask registers */ - volatile u32 *base_addr; -} intr_group_t; - -#define RC32434_NR_IRQS (GROUP4_IRQ_BASE + 32) - -#if (NR_IRQS < RC32434_NR_IRQS) -#error Too little irqs defined. Did you override <asm/irq.h> ? -#endif - -static const intr_group_t intr_group[NUM_INTR_GROUPS] = { - { 0x0000efff, (u32 *)KSEG1ADDR(IC_GROUP0_PEND + 0 * IC_GROUP_OFFSET) }, - { 0x00001fff, (u32 *)KSEG1ADDR(IC_GROUP0_PEND + 1 * IC_GROUP_OFFSET) }, - { 0x00000007, (u32 *)KSEG1ADDR(IC_GROUP0_PEND + 2 * IC_GROUP_OFFSET) }, - { 0x0003ffff, (u32 *)KSEG1ADDR(IC_GROUP0_PEND + 3 * IC_GROUP_OFFSET) }, - { 0xffffffff, (u32 *)KSEG1ADDR(IC_GROUP0_PEND + 4 * IC_GROUP_OFFSET) } -}; - -#define READ_PEND(base) (*(base)) -#define READ_MASK(base) (*(base + 2)) -#define WRITE_MASK(base, val) (*(base + 2) = (val)) - -static inline int irq_to_group(unsigned int irq_nr) -{ - return ((irq_nr - GROUP0_IRQ_BASE) >> 5); -} - -static inline int group_to_ip(unsigned int group) -{ - return group + 2; -} - -static inline void enable_local_irq(unsigned int ip) -{ - int ipnum = 0x100 << ip; - clear_c0_cause(ipnum); - set_c0_status(ipnum); -} - -static inline void disable_local_irq(unsigned int ip) -{ - int ipnum = 0x100 << ip; - clear_c0_status(ipnum); -} - -static inline void ack_local_irq(unsigned int ip) -{ - int ipnum = 0x100 << ip; - clear_c0_cause(ipnum); -} - -static void rb500_enable_irq(unsigned int irq_nr) -{ - int ip = irq_nr - GROUP0_IRQ_BASE; - unsigned int group, intr_bit; - volatile unsigned int *addr; - - - if (ip < 0) - enable_local_irq(irq_nr); - else { - group = ip >> 5; - - ip &= (1<<5)-1; - intr_bit = 1 << ip; - - enable_local_irq(group_to_ip(group)); - - addr = intr_group[group].base_addr; - WRITE_MASK(addr, READ_MASK(addr) & ~intr_bit); - } -} - -static void rb500_disable_irq(unsigned int irq_nr) -{ - int ip = irq_nr - GROUP0_IRQ_BASE; - unsigned int group, intr_bit, mask; - volatile unsigned int *addr; - - if (ip < 0) { - disable_local_irq(irq_nr); - }else{ - group = ip >> 5; - - ip &= (1<<5) -1; - intr_bit = 1 << ip; - addr = intr_group[group].base_addr; - mask = READ_MASK(addr); - mask |= intr_bit; - WRITE_MASK(addr,mask); - - /* - * if there are no more interrupts enabled in this - * group, disable corresponding IP - */ - if (mask == intr_group[group].mask) - disable_local_irq(group_to_ip(group)); - } -} - -static unsigned int startup_irq(unsigned int irq_nr) -{ - rb500_enable_irq(irq_nr); - return 0; -} - -static void shutdown_irq(unsigned int irq_nr) -{ - rb500_disable_irq(irq_nr); - return; -} - -static void mask_and_ack_irq(unsigned int irq_nr) -{ - rb500_disable_irq(irq_nr); - ack_local_irq(group_to_ip(irq_to_group(irq_nr))); -} - -static void rb500_end_irq(unsigned int irq_nr) -{ - - int ip = irq_nr - GROUP0_IRQ_BASE; - unsigned int intr_bit, group; - volatile unsigned int *addr; - - if ((irq_desc[irq_nr].status & (IRQ_DISABLED | IRQ_INPROGRESS))) { - printk("warning: end_irq %d did not enable (%x)\n", - irq_nr, irq_desc[irq_nr].status); - return; - } - - if (ip < 0) { - enable_local_irq(irq_nr); - } else { - group = ip >> 5; - - ip &= (1 << 5) - 1; - intr_bit = 1 << ip; - - if (irq_nr >= GROUP4_IRQ_BASE && irq_nr <= (GROUP4_IRQ_BASE + 13)) { - rb500_gpio_reg0->gpioistat = rb500_gpio_reg0->gpioistat & ~intr_bit; - } - - enable_local_irq(group_to_ip(group)); - - addr = intr_group[group].base_addr; - WRITE_MASK(addr, READ_MASK(addr) & ~intr_bit); - } -} - -static struct hw_interrupt_type rc32434_irq_type = { - .typename = "RB500", - .startup = startup_irq, - .shutdown = shutdown_irq, - .enable = rb500_enable_irq, - .disable = rb500_disable_irq, - .ack = mask_and_ack_irq, - .end = rb500_end_irq, -}; - - -void __init arch_init_irq(void) -{ - int i; - - printk("Initializing IRQ's: %d out of %d\n", RC32434_NR_IRQS, NR_IRQS); - memset(irq_desc, 0, sizeof(irq_desc)); - - for (i = 0; i < RC32434_NR_IRQS; i++) { - irq_desc[i].status = IRQ_DISABLED; - irq_desc[i].action = NULL; - irq_desc[i].depth = 1; - irq_desc[i].chip = &rc32434_irq_type; - spin_lock_init(&irq_desc[i].lock); - } -} - -/* Main Interrupt dispatcher */ -asmlinkage void plat_irq_dispatch(void) -{ - unsigned int ip, pend, group; - volatile unsigned int *addr; - unsigned int cp0_cause = read_c0_cause() & read_c0_status(); - - if (cp0_cause & CAUSEF_IP7) { - ll_timer_interrupt(7); - } else if ((ip = (cp0_cause & 0x7c00))) { - group = 21 - rc32434_clz(ip); - - addr = intr_group[group].base_addr; - - pend = READ_PEND(addr); - pend &= ~READ_MASK(addr); // only unmasked interrupts - pend = 39 - rc32434_clz(pend); - do_IRQ((group << 5) + pend); - } -} |