Enable/Restore alignment fault state on interrupt handler entry/exit.
This commit is contained in:
scw
parent
aad37eaff6
commit
f77bf2bb0c
@ -1,4 +1,4 @@
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/* $NetBSD: iomd_irq.S,v 1.3 2002/10/14 22:32:51 bjh21 Exp $ */
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/* $NetBSD: iomd_irq.S,v 1.4 2003/11/05 21:10:59 scw Exp $ */
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/*
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* Copyright (c) 1994-1998 Mark Brinicombe.
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@ -96,6 +96,8 @@ Lcurrent_intr_depth:
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Lspl_masks:
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.word _C_LABEL(spl_masks)
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AST_ALIGNMENT_FAULT_LOCALS
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/*
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* Register usage
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*
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@ -117,6 +119,7 @@ ASENTRY_NP(irq_entry)
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sub lr, lr, #0x00000004 /* Adjust the lr */
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PUSHFRAMEINSVC /* Push an interrupt frame */
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ENABLE_ALIGNMENT_FAULTS
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/* Load r8 with the IOMD interrupt requests */
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@ -323,17 +326,6 @@ exitirq:
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bl _C_LABEL(dosoftints) /* Handle the soft interrupts */
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/* Manage AST's. Maybe this should be done as a soft interrupt ? */
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ldr r0, [sp] /* Get the SPSR from stack */
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and r0, r0, #(PSR_MODE) /* Test for USR32 mode before the IRQ */
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teq r0, #(PSR_USR32_MODE)
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ldreq r0, Lastpending /* Do we have an AST pending ? */
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ldreq r1, [r0]
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teqeq r1, #0x00000001
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beq irqast /* call the AST handler */
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/* Kill IRQ's in preparation for exit */
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mrs r0, cpsr_all
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orr r0, r0, #(I32_bit)
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@ -345,51 +337,12 @@ exitirq:
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sub r1, r1, #1
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str r1, [r0]
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DO_AST_AND_RESTORE_ALIGNMENT_FAULTS
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PULLFRAMEFROMSVCANDEXIT
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/* NOT REACHED */
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b . - 8
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/*
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* Ok, snag with current intr depth ...
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* If ast() calls mi_sleep() the current_intr_depth will not be
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* decremented until the process is woken up. This can result
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* in the system believing it is still in the interrupt handler.
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* If we are calling ast() then correct the current_intr_depth
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* before the call.
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*/
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irqast:
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mov r1, #0x00000000 /* Clear ast_pending */
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str r1, [r0]
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/* Kill IRQ's so we atomically decrement current_intr_depth */
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mrs r2, cpsr_all
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orr r3, r2, #(I32_bit)
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msr cpsr_all, r3
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/* Decrement the interrupt nesting count */
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ldr r0, Lcurrent_intr_depth
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ldr r1, [r0]
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sub r1, r1, #1
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str r1, [r0]
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/* Restore IRQ's */
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msr cpsr_all, r2
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mov r0, sp
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bl _C_LABEL(ast)
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/* Kill IRQ's in preparation for exit */
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mrs r0, cpsr_all
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orr r0, r0, #(I32_bit)
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msr cpsr_all, r0
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PULLFRAMEFROMSVCANDEXIT
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/* NOT REACHED */
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b . - 8
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Lspl_mask:
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.word _C_LABEL(spl_mask) /* irq's allowed at current spl level */
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@ -454,9 +407,6 @@ Lintrcnt:
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Lirqhandlers:
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.word _C_LABEL(irqhandlers) /* Pointer to array of irqhandlers */
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Lastpending:
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.word _C_LABEL(astpending)
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#ifdef IRQSTATS
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/* These symbols are used by vmstat */
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@ -1,4 +1,4 @@
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/* $NetBSD: ofw_irq.S,v 1.2 2002/10/14 22:32:52 bjh21 Exp $ */
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/* $NetBSD: ofw_irq.S,v 1.3 2003/11/05 21:10:59 scw Exp $ */
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/*
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* Copyright (c) 1994-1998 Mark Brinicombe.
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@ -95,6 +95,8 @@ Lirq_entry:
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Lofwirqstk: /* hack */
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.word ofwirqstk + 4096
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AST_ALIGNMENT_FAULT_LOCALS
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/*
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* Regsister usage
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*
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@ -187,6 +189,11 @@ ASENTRY_NP(irq_entry)
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* which follows it.
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*/
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ofwtakeint:
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#if defined(COMPAT_15) && defined(EXEC_AOUT)
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ldr r0, [sp] /* Fetch SPSR */
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#endif
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ENABLE_ALIGNMENT_FAULTS
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mov r8, #0x00000001 /* timer interrupt pending! */
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mov r8, r8, lsl #IRQ_TIMER0
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@ -317,17 +324,6 @@ nextirq:
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bl _C_LABEL(dosoftints) /* Handle the soft interrupts */
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/* Manage AST's. Maybe this should be done as a soft interrupt ? */
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ldr r0, [sp] /* Get the SPSR from stack */
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and r0, r0, #(PSR_MODE) /* Test for USR32 mode before the IRQ */
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teq r0, #(PSR_USR32_MODE)
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ldreq r0, Lastpending /* Do we have an AST pending ? */
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ldreq r1, [r0]
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teqeq r1, #0x00000001
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beq irqast /* call the AST handler */
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/* Kill IRQ's in preparation for exit */
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mrs r0, cpsr_all
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orr r0, r0, #(I32_bit)
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@ -339,52 +335,10 @@ nextirq:
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sub r1, r1, #1
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str r1, [r0]
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DO_AST_AND_RESTORE_ALIGNMENT_FAULTS
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PULLFRAMEFROMSVCANDEXIT
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movs pc, lr /* Exit */
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/*
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* Ok, snag with current intr depth ...
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* If ast() calls mi_sleep() the current_intr_depth will not be
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* decremented until the process is woken up. This can result
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* in the system believing it is still in the interrupt handler.
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* If we are calling ast() then correct the current_intr_depth
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* before the call.
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*/
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irqast:
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mov r1, #0x00000000 /* Clear ast_pending */
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str r1, [r0]
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/* Kill IRQ's so we atomically decrement current_intr_depth */
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mrs r2, cpsr_all
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orr r3, r2, #(I32_bit)
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msr cpsr_all, r3
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/* Decrement the nest count */
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ldr r0, Lcurrent_intr_depth
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ldr r1, [r0]
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sub r1, r1, #1
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str r1, [r0]
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/* Restore IRQ's */
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msr cpsr_all, r2
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mov r0, sp
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bl _C_LABEL(ast)
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/* Kill IRQ's in preparation for exit */
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mrs r0, cpsr_all
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orr r0, r0, #(I32_bit)
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msr cpsr_all, r0
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PULLFRAMEFROMSVCANDEXIT
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movs pc, lr /* Exit */
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Lspl_mask:
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.word _C_LABEL(spl_mask) /* irq's allowed at current spl level */
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@ -407,9 +361,6 @@ Lintrcnt:
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Lirqhandlers:
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.word _C_LABEL(irqhandlers) /* Pointer to array of irqhandlers */
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Lastpending:
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.word _C_LABEL(astpending)
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.text
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.global _C_LABEL(dotickgrovelling)
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@ -1,4 +1,4 @@
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/* $NetBSD: sa11x0_irq.S,v 1.5 2003/03/31 19:52:35 chris Exp $ */
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/* $NetBSD: sa11x0_irq.S,v 1.6 2003/11/05 21:10:59 scw Exp $ */
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/*
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* Copyright (c) 1998 Mark Brinicombe.
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@ -67,6 +67,8 @@ Ldbg_str:
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.asciz "irq_entry %x %x\n"
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#endif
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AST_ALIGNMENT_FAULT_LOCALS
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/*
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* Regsister usage
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*
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@ -81,6 +83,7 @@ ASENTRY_NP(irq_entry)
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sub lr, lr, #0x00000004 /* Adjust the lr */
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PUSHFRAMEINSVC /* Push an interrupt frame */
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ENABLE_ALIGNMENT_FAULTS
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/* Load r8 with the SAIPIC interrupt requests */
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@ -223,17 +226,6 @@ nextirq:
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bl _C_LABEL(dosoftints) /* Handle the soft interrupts */
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/* Manage AST's. Maybe this should be done as a soft interrupt ? */
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ldr r0, [sp] /* Get the SPSR from stack */
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and r0, r0, #(PSR_MODE) /* Test for USR32 mode before the IRQ */
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teq r0, #(PSR_USR32_MODE)
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ldreq r0, Lastpending /* Do we have an AST pending ? */
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ldreq r1, [r0]
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teqeq r1, #0x00000001
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beq irqast /* call the AST handler */
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/* Kill IRQ's in preparation for exit */
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mrs r0, cpsr_all
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orr r0, r0, #(I32_bit)
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@ -252,51 +244,12 @@ nextirq:
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sub r1, r1, #1
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str r1, [r0]
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DO_AST_AND_RESTORE_ALIGNMENT_FAULTS
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PULLFRAMEFROMSVCANDEXIT
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/* NOT REACHED */
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b . - 8
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/*
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* Ok, snag with current intr depth ...
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* If ast() calls mi_sleep() the current_intr_depth will not be
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* decremented until the process is woken up. This can result
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* in the system believing it is still in the interrupt handler.
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* If we are calling ast() then correct the current_intr_depth
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* before the call.
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*/
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irqast:
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mov r1, #0x00000000 /* Clear ast_pending */
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str r1, [r0]
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/* Kill IRQ's so we atomically decrement current_intr_depth */
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mrs r2, cpsr_all
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orr r3, r2, #(I32_bit)
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msr cpsr_all, r3
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/* Decrement the interrupt nesting count */
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ldr r0, Lcurrent_intr_depth
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ldr r1, [r0]
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sub r1, r1, #1
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str r1, [r0]
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/* Restore IRQ's */
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msr cpsr_all, r2
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mov r0, sp
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bl _C_LABEL(ast)
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/* Kill IRQ's in preparation for exit */
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mrs r0, cpsr_all
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orr r0, r0, #(I32_bit)
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msr cpsr_all, r0
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PULLFRAMEFROMSVCANDEXIT
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/* NOT REACHED */
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b . - 8
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ENTRY(irq_setmasks)
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/* Disable interrupts */
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mrs r3, cpsr_all
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@ -327,10 +280,6 @@ Lintrcnt:
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Lirqhandlers:
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.word _C_LABEL(irqhandlers) /* Pointer to array of irqhandlers */
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Lastpending:
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.word _C_LABEL(astpending)
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#ifdef IRQSTATS
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.global _C_LABEL(intrnames), _C_LABEL(eintrnames)
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@ -1,4 +1,4 @@
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/* $NetBSD: i80200_irq.S,v 1.10 2003/01/02 23:54:41 thorpej Exp $ */
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/* $NetBSD: i80200_irq.S,v 1.11 2003/11/05 21:10:59 scw Exp $ */
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/*
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* Copyright (c) 2002 Wasabi Systems, Inc.
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@ -65,13 +65,13 @@
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.word _C_LABEL(xscale_pmc_dispatch)
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#endif
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.Lastpending:
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.word _C_LABEL(astpending)
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AST_ALIGNMENT_FAULT_LOCALS
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ASENTRY_NP(irq_entry)
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sub lr, lr, #0x00000004 /* Adjust the lr */
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PUSHFRAMEINSVC /* Push an interrupt frame */
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ENABLE_ALIGNMENT_FAULTS
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/*
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* Note that we have entered the IRQ handler. We are
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@ -128,34 +128,7 @@ ASENTRY_NP(irq_entry)
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sub r1, r1, #1
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str r1, [r0]
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/*
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* If we're returning to user mode, check for pending ASTs.
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*/
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ldr r0, [sp] /* Get the SPSR from stack */
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and r0, r0, #(PSR_MODE) /* Test for USR32 mode before the IRQ */
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teq r0, #(PSR_USR32_MODE)
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bne .Lirqout /* Nope, get out now */
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.Lastloop:
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ldr r0, .Lastpending /* Do we have an AST pending? */
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ldr r1, [r0]
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teq r1, #0x00000000
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beq .Lirqout /* Nope, get out now */
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mov r1, #0x00000000
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str r1, [r0] /* Clear astpending */
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mrs r4, cpsr /* save CPSR */
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bic r0, r4, #(I32_bit) /* Enable IRQs */
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msr cpsr_c, r0
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mov r0, sp
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bl _C_LABEL(ast) /* ast(frame) */
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msr cpsr_c, r4 /* Disable IRQs */
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b .Lastloop /* Check for more ASTs */
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.Lirqout:
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DO_AST_AND_RESTORE_ALIGNMENT_FAULTS
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PULLFRAMEFROMSVCANDEXIT
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movs pc, lr /* Exit */
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