diff options
Diffstat (limited to 'arch/mips/sibyte')
| -rw-r--r-- | arch/mips/sibyte/bcm1480/Makefile | 2 | ||||
| -rw-r--r-- | arch/mips/sibyte/bcm1480/irq.c | 77 | ||||
| -rw-r--r-- | arch/mips/sibyte/bcm1480/irq_handler.S | 165 | ||||
| -rw-r--r-- | arch/mips/sibyte/sb1250/Makefile | 2 | ||||
| -rw-r--r-- | arch/mips/sibyte/sb1250/irq.c | 78 | ||||
| -rw-r--r-- | arch/mips/sibyte/sb1250/irq_handler.S | 147 |
6 files changed, 147 insertions, 324 deletions
diff --git a/arch/mips/sibyte/bcm1480/Makefile b/arch/mips/sibyte/bcm1480/Makefile index 538d5a51ae94..7b36ff3873b7 100644 --- a/arch/mips/sibyte/bcm1480/Makefile +++ b/arch/mips/sibyte/bcm1480/Makefile @@ -1,4 +1,4 @@ -obj-y := setup.o irq.o irq_handler.o time.o +obj-y := setup.o irq.o time.o obj-$(CONFIG_SMP) += smp.o diff --git a/arch/mips/sibyte/bcm1480/irq.c b/arch/mips/sibyte/bcm1480/irq.c index 9cf7d713b13c..e61760b14d99 100644 --- a/arch/mips/sibyte/bcm1480/irq.c +++ b/arch/mips/sibyte/bcm1480/irq.c @@ -187,9 +187,6 @@ static void bcm1480_set_affinity(unsigned int irq, cpumask_t mask) #endif -/* Defined in arch/mips/sibyte/bcm1480/irq_handler.S */ -extern void bcm1480_irq_handler(void); - /*****************************************************************************/ static unsigned int startup_bcm1480_irq(unsigned int irq) @@ -422,7 +419,6 @@ void __init arch_init_irq(void) #endif /* Enable necessary IPs, disable the rest */ change_c0_status(ST0_IM, imask); - set_except_vector(0, bcm1480_irq_handler); #ifdef CONFIG_KGDB if (kgdb_flag) { @@ -473,3 +469,76 @@ void bcm1480_kgdb_interrupt(struct pt_regs *regs) } #endif /* CONFIG_KGDB */ + +static inline int dclz(unsigned long long x) +{ + int lz; + + __asm__ ( + " .set push \n" + " .set mips64 \n" + " dclz %0, %1 \n" + " .set pop \n" + : "=r" (lz) + : "r" (x)); + + return lz; +} + +extern void bcm1480_timer_interrupt(struct pt_regs *regs); +extern void bcm1480_mailbox_interrupt(struct pt_regs *regs); +extern void bcm1480_kgdb_interrupt(struct pt_regs *regs); + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending; + +#ifdef CONFIG_SIBYTE_BCM1480_PROF + /* Set compare to count to silence count/compare timer interrupts */ + write_c0_compare(read_c0_count()); +#endif + + pending = read_c0_cause(); + +#ifdef CONFIG_SIBYTE_BCM1480_PROF + if (pending & CAUSEF_IP7) /* Cpu performance counter interrupt */ + sbprof_cpu_intr(exception_epc(regs)); +#endif + + if (pending & CAUSEF_IP4) + bcm1480_timer_interrupt(regs); + +#ifdef CONFIG_SMP + if (pending & CAUSEF_IP3) + bcm1480_mailbox_interrupt(regs); +#endif + +#ifdef CONFIG_KGDB + if (pending & CAUSEF_IP6) + bcm1480_kgdb_interrupt(regs); /* KGDB (uart 1) */ +#endif + + if (pending & CAUSEF_IP2) { + unsigned long long mask_h, mask_l; + unsigned long base; + + /* + * Default...we've hit an IP[2] interrupt, which means we've + * got to check the 1480 interrupt registers to figure out what + * to do. Need to detect which CPU we're on, now that + * smp_affinity is supported. + */ + base = A_BCM1480_IMR_MAPPER(smp_processor_id()); + mask_h = __raw_readq( + IOADDR(base + R_BCM1480_IMR_INTERRUPT_STATUS_BASE_H)); + mask_l = __raw_readq( + IOADDR(base + R_BCM1480_IMR_INTERRUPT_STATUS_BASE_L)); + + if (!mask_h) { + if (mask_h ^ 1) + do_IRQ(63 - dclz(mask_h), regs); + else + do_IRQ(127 - dclz(mask_l), regs); + } + } +} diff --git a/arch/mips/sibyte/bcm1480/irq_handler.S b/arch/mips/sibyte/bcm1480/irq_handler.S deleted file mode 100644 index 408db88d050f..000000000000 --- a/arch/mips/sibyte/bcm1480/irq_handler.S +++ /dev/null @@ -1,165 +0,0 @@ -/* - * Copyright (C) 2000,2001,2002,2003,2004 Broadcom Corporation - * - * 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 program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -/* - * bcm1480_irq_handler() is the routine that is actually called when an - * interrupt occurs. It is installed as the exception vector handler in - * init_IRQ() in arch/mips/sibyte/bcm1480/irq.c - * - * In the handle we figure out which interrupts need handling, and use that - * to call the dispatcher, which will take care of actually calling - * registered handlers - * - * Note that we take care of all raised interrupts in one go at the handler. - * This is more BSDish than the Indy code, and also, IMHO, more sane. - */ -#include <linux/config.h> - -#include <asm/addrspace.h> -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> -#include <asm/sibyte/sb1250_defs.h> -#include <asm/sibyte/bcm1480_regs.h> -#include <asm/sibyte/bcm1480_int.h> - -/* - * What a pain. We have to be really careful saving the upper 32 bits of any - * register across function calls if we don't want them trashed--since were - * running in -o32, the calling routing never saves the full 64 bits of a - * register across a function call. Being the interrupt handler, we're - * guaranteed that interrupts are disabled during this code so we don't have - * to worry about random interrupts blasting the high 32 bits. - */ - - .text - .set push - .set noreorder - .set noat - .set mips64 - #.set mips4 - .align 5 - NESTED(bcm1480_irq_handler, PT_SIZE, sp) - SAVE_ALL - CLI - -#ifdef CONFIG_SIBYTE_BCM1480_PROF - /* Set compare to count to silence count/compare timer interrupts */ - mfc0 t1, CP0_COUNT - mtc0 t1, CP0_COMPARE /* pause to clear IP[7] bit of cause ? */ -#endif - /* Read cause */ - mfc0 s0, CP0_CAUSE - -#ifdef CONFIG_SIBYTE_BCM1480_PROF - /* Cpu performance counter interrupt is routed to IP[7] */ - andi t1, s0, CAUSEF_IP7 - beqz t1, 0f - srl t1, s0, (CAUSEB_BD-2) /* Shift BD bit to bit 2 */ - and t1, t1, 0x4 /* mask to get just BD bit */ -#ifdef CONFIG_MIPS64 - dmfc0 a0, CP0_EPC - daddu a0, a0, t1 /* a0 = EPC + (BD ? 4 : 0) */ -#else - mfc0 a0, CP0_EPC - addu a0, a0, t1 /* a0 = EPC + (BD ? 4 : 0) */ -#endif - jal sbprof_cpu_intr - nop - j ret_from_irq - nop -0: -#endif - - /* Timer interrupt is routed to IP[4] */ - andi t1, s0, CAUSEF_IP4 - beqz t1, 1f - nop - jal bcm1480_timer_interrupt - move a0, sp /* Pass the registers along */ - j ret_from_irq - nop /* delay slot */ -1: - -#ifdef CONFIG_SMP - /* Mailbox interrupt is routed to IP[3] */ - andi t1, s0, CAUSEF_IP3 - beqz t1, 2f - nop - jal bcm1480_mailbox_interrupt - move a0, sp - j ret_from_irq - nop /* delay slot */ -2: -#endif - -#ifdef CONFIG_KGDB - /* KGDB (uart 1) interrupt is routed to IP[6] */ - andi t1, s0, CAUSEF_IP6 - beqz t1, 3f - nop /* delay slot */ - jal bcm1480_kgdb_interrupt - move a0, sp - j ret_from_irq - nop /* delay slot */ -3: -#endif - - and t1, s0, CAUSEF_IP2 - beqz t1, 9f - nop - - /* - * Default...we've hit an IP[2] interrupt, which means we've got - * to check the 1480 interrupt registers to figure out what to do - * Need to detect which CPU we're on, now that smp_affinity is - * supported. - */ - PTR_LA v0, CKSEG1 + A_BCM1480_IMR_CPU0_BASE -#ifdef CONFIG_SMP - lw t1, TI_CPU($28) - sll t1, t1, BCM1480_IMR_REGISTER_SPACING_SHIFT - addu v0, v0, t1 -#endif - - /* Read IP[2] status (get both high and low halves of status) */ - ld s0, R_BCM1480_IMR_INTERRUPT_STATUS_BASE_H(v0) - ld s1, R_BCM1480_IMR_INTERRUPT_STATUS_BASE_L(v0) - - move s2, zero /* intr number */ - li s3, 64 - - beqz s0, 9f /* No interrupts. Return. */ - move a1, sp - - xori s4, s0, 1 /* if s0 (_H) == 1, it's a low intr, so... */ - movz s2, s3, s4 /* start the intr number at 64, and */ - movz s0, s1, s4 /* look at the low status value. */ - - dclz s1, s0 /* Find the next interrupt. */ - dsubu a0, zero, s1 - daddiu a0, a0, 63 - jal do_IRQ - daddu a0, a0, s2 - -9: j ret_from_irq - nop - - .set pop - END(bcm1480_irq_handler) diff --git a/arch/mips/sibyte/sb1250/Makefile b/arch/mips/sibyte/sb1250/Makefile index a8af84697588..a2fdbd62f8ac 100644 --- a/arch/mips/sibyte/sb1250/Makefile +++ b/arch/mips/sibyte/sb1250/Makefile @@ -1,4 +1,4 @@ -obj-y := setup.o irq.o irq_handler.o time.o +obj-y := setup.o irq.o time.o obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_SIBYTE_TBPROF) += bcm1250_tbprof.o diff --git a/arch/mips/sibyte/sb1250/irq.c b/arch/mips/sibyte/sb1250/irq.c index 589537bfcc3d..0f6e54db4888 100644 --- a/arch/mips/sibyte/sb1250/irq.c +++ b/arch/mips/sibyte/sb1250/irq.c @@ -163,10 +163,6 @@ static void sb1250_set_affinity(unsigned int irq, cpumask_t mask) } #endif - -/* Defined in arch/mips/sibyte/sb1250/irq_handler.S */ -extern void sb1250_irq_handler(void); - /*****************************************************************************/ static unsigned int startup_sb1250_irq(unsigned int irq) @@ -379,7 +375,6 @@ void __init arch_init_irq(void) #endif /* Enable necessary IPs, disable the rest */ change_c0_status(ST0_IM, imask); - set_except_vector(0, sb1250_irq_handler); #ifdef CONFIG_KGDB if (kgdb_flag) { @@ -409,7 +404,7 @@ void __init arch_init_irq(void) #define duart_out(reg, val) csr_out32(val, IOADDR(A_DUART_CHANREG(kgdb_port,reg))) #define duart_in(reg) csr_in32(IOADDR(A_DUART_CHANREG(kgdb_port,reg))) -void sb1250_kgdb_interrupt(struct pt_regs *regs) +static void sb1250_kgdb_interrupt(struct pt_regs *regs) { /* * Clear break-change status (allow some time for the remote @@ -424,3 +419,74 @@ void sb1250_kgdb_interrupt(struct pt_regs *regs) } #endif /* CONFIG_KGDB */ + +static inline int dclz(unsigned long long x) +{ + int lz; + + __asm__ ( + " .set push \n" + " .set mips64 \n" + " dclz %0, %1 \n" + " .set pop \n" + : "=r" (lz) + : "r" (x)); + + return lz; +} + +asmlinkage void plat_irq_dispatch(struct pt_regs *regs) +{ + unsigned int pending; + +#ifdef CONFIG_SIBYTE_SB1250_PROF + /* Set compare to count to silence count/compare timer interrupts */ + write_c0_count(read_c0_count()); +#endif + + /* + * What a pain. We have to be really careful saving the upper 32 bits + * of any * register across function calls if we don't want them + * trashed--since were running in -o32, the calling routing never saves + * the full 64 bits of a register across a function call. Being the + * interrupt handler, we're guaranteed that interrupts are disabled + * during this code so we don't have to worry about random interrupts + * blasting the high 32 bits. + */ + + pending = read_c0_cause(); + +#ifdef CONFIG_SIBYTE_SB1250_PROF + if (pending & CAUSEF_IP7) { /* Cpu performance counter interrupt */ + sbprof_cpu_intr(exception_epc(regs)); + } +#endif + + if (pending & CAUSEF_IP4) + sb1250_timer_interrupt(regs); + +#ifdef CONFIG_SMP + if (pending & CAUSEF_IP3) + sb1250_mailbox_interrupt(regs); +#endif + +#ifdef CONFIG_KGDB + if (pending & CAUSEF_IP6) /* KGDB (uart 1) */ + sb1250_kgdb_interrupt(regs); +#endif + + if (pending & CAUSEF_IP2) { + unsigned long long mask; + + /* + * Default...we've hit an IP[2] interrupt, which means we've + * got to check the 1250 interrupt registers to figure out what + * to do. Need to detect which CPU we're on, now that + ~ smp_affinity is supported. + */ + mask = __raw_readq(IOADDR(A_IMR_REGISTER(smp_processor_id(), + R_IMR_INTERRUPT_STATUS_BASE))); + if (mask) + do_IRQ(63 - dclz(mask), regs); + } +} diff --git a/arch/mips/sibyte/sb1250/irq_handler.S b/arch/mips/sibyte/sb1250/irq_handler.S deleted file mode 100644 index 60edc8fb302b..000000000000 --- a/arch/mips/sibyte/sb1250/irq_handler.S +++ /dev/null @@ -1,147 +0,0 @@ -/* - * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation - * - * 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 program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -/* - * sb1250_handle_int() is the routine that is actually called when an interrupt - * occurs. It is installed as the exception vector handler in arch_init_irq() - * in arch/mips/sibyte/sb1250/irq.c - * - * In the handle we figure out which interrupts need handling, and use that to - * call the dispatcher, which will take care of actually calling registered - * handlers - * - * Note that we take care of all raised interrupts in one go at the handler. - * This is more BSDish than the Indy code, and also, IMHO, more sane. - */ -#include <linux/config.h> - -#include <asm/addrspace.h> -#include <asm/asm.h> -#include <asm/mipsregs.h> -#include <asm/regdef.h> -#include <asm/stackframe.h> -#include <asm/sibyte/sb1250_defs.h> -#include <asm/sibyte/sb1250_regs.h> -#include <asm/sibyte/sb1250_int.h> - -/* - * What a pain. We have to be really careful saving the upper 32 bits of any - * register across function calls if we don't want them trashed--since were - * running in -o32, the calling routing never saves the full 64 bits of a - * register across a function call. Being the interrupt handler, we're - * guaranteed that interrupts are disabled during this code so we don't have - * to worry about random interrupts blasting the high 32 bits. - */ - - .text - .set push - .set noreorder - .set noat - .set mips64 - .align 5 - NESTED(sb1250_irq_handler, PT_SIZE, sp) - SAVE_ALL - CLI - -#ifdef CONFIG_SIBYTE_SB1250_PROF - /* Set compare to count to silence count/compare timer interrupts */ - mfc0 t1, CP0_COUNT - mtc0 t1, CP0_COMPARE /* pause to clear IP[7] bit of cause ? */ -#endif - /* Read cause */ - mfc0 s0, CP0_CAUSE - -#ifdef CONFIG_SIBYTE_SB1250_PROF - /* Cpu performance counter interrupt is routed to IP[7] */ - andi t1, s0, CAUSEF_IP7 - beqz t1, 0f - srl t1, s0, (CAUSEB_BD-2) /* Shift BD bit to bit 2 */ - and t1, t1, 0x4 /* mask to get just BD bit */ - mfc0 a0, CP0_EPC - jal sbprof_cpu_intr - addu a0, a0, t1 /* a0 = EPC + (BD ? 4 : 0) */ - j ret_from_irq - nop -0: -#endif - - /* Timer interrupt is routed to IP[4] */ - andi t1, s0, CAUSEF_IP4 - beqz t1, 1f - nop - jal sb1250_timer_interrupt - move a0, sp /* Pass the registers along */ - j ret_from_irq - nop # delay slot -1: - -#ifdef CONFIG_SMP - /* Mailbox interrupt is routed to IP[3] */ - andi t1, s0, CAUSEF_IP3 - beqz t1, 2f - nop - jal sb1250_mailbox_interrupt - move a0, sp - j ret_from_irq - nop # delay slot -2: -#endif - -#ifdef CONFIG_KGDB - /* KGDB (uart 1) interrupt is routed to IP[6] */ - andi t1, s0, CAUSEF_IP6 - beqz t1, 1f - nop # delay slot - jal sb1250_kgdb_interrupt - move a0, sp - j ret_from_irq - nop # delay slot -1: -#endif - - and t1, s0, CAUSEF_IP2 - beqz t1, 4f - nop - - /* - * Default...we've hit an IP[2] interrupt, which means we've got to - * check the 1250 interrupt registers to figure out what to do - * Need to detect which CPU we're on, now that smp_affinity is supported. - */ - PTR_LA v0, CKSEG1 + A_IMR_CPU0_BASE -#ifdef CONFIG_SMP - lw t1, TI_CPU($28) - sll t1, IMR_REGISTER_SPACING_SHIFT - addu v0, t1 -#endif - ld s0, R_IMR_INTERRUPT_STATUS_BASE(v0) /* read IP[2] status */ - - beqz s0, 4f /* No interrupts. Return */ - move a1, sp - -3: dclz s1, s0 /* Find the next interrupt */ - dsubu a0, zero, s1 - daddiu a0, a0, 63 - jal do_IRQ - nop - -4: j ret_from_irq - nop - - .set pop - END(sb1250_irq_handler) |