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powerpc/book3e: Hookup doorbells exceptions on 64-bit Book3E

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Note that critical doorbells are an unimplemented stub just like
other critical or machine check handlers, since we haven't done
support for "levelled" exceptions yet.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2010-07-09 15:31:28 +10:00
parent e8775d4aa1
commit 89c81797d4
3 changed files with 25 additions and 4 deletions
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1
arch/powerpc/kernel/Makefile
View File

@ -68,6 +68,7 @@ obj64-$(CONFIG_HIBERNATION) += swsusp_asm64.o
obj-$(CONFIG_MODULES) += module.o module_$(CONFIG_WORD_SIZE).o
obj-$(CONFIG_44x) += cpu_setup_44x.o
obj-$(CONFIG_FSL_BOOKE) += cpu_setup_fsl_booke.o dbell.o
obj-$(CONFIG_PPC_BOOK3E_64) += dbell.o
extra-y := head_$(CONFIG_WORD_SIZE).o
extra-$(CONFIG_PPC_BOOK3E_32) := head_new_booke.o

21
arch/powerpc/kernel/exceptions-64e.S
View File

@ -246,11 +246,9 @@ interrupt_base_book3e: /* fake trap */
EXCEPTION_STUB(0x1a0, watchdog) /* 0x09f0 */
EXCEPTION_STUB(0x1c0, data_tlb_miss)
EXCEPTION_STUB(0x1e0, instruction_tlb_miss)
EXCEPTION_STUB(0x280, doorbell)
EXCEPTION_STUB(0x2a0, doorbell_crit)
#if 0
EXCEPTION_STUB(0x280, processor_doorbell)
EXCEPTION_STUB(0x220, processor_doorbell_crit)
#endif
.globl interrupt_end_book3e
interrupt_end_book3e:
@ -428,6 +426,19 @@ interrupt_end_book3e:
kernel_dbg_exc:
b . /* NYI */
/* Doorbell interrupt */
MASKABLE_EXCEPTION(0x2070, doorbell, .doorbell_exception, ACK_NONE)
/* Doorbell critical Interrupt */
START_EXCEPTION(doorbell_crit);
CRIT_EXCEPTION_PROLOG(0x2080, PROLOG_ADDITION_NONE)
// EXCEPTION_COMMON(0x2080, PACA_EXCRIT, INTS_DISABLE_ALL)
// bl special_reg_save_crit
// addi r3,r1,STACK_FRAME_OVERHEAD
// bl .doorbell_critical_exception
// b ret_from_crit_except
b .
/*
* An interrupt came in while soft-disabled; clear EE in SRR1,
@ -563,6 +574,8 @@ BAD_STACK_TRAMPOLINE(0xd00)
BAD_STACK_TRAMPOLINE(0xe00)
BAD_STACK_TRAMPOLINE(0xf00)
BAD_STACK_TRAMPOLINE(0xf20)
BAD_STACK_TRAMPOLINE(0x2070)
BAD_STACK_TRAMPOLINE(0x2080)
.globl bad_stack_book3e
bad_stack_book3e:

7
arch/powerpc/kernel/irq.c
View File

@ -64,6 +64,8 @@
#include <asm/ptrace.h>
#include <asm/machdep.h>
#include <asm/udbg.h>
#include <asm/dbell.h>
#ifdef CONFIG_PPC64
#include <asm/paca.h>
#include <asm/firmware.h>
@ -153,6 +155,11 @@ notrace void raw_local_irq_restore(unsigned long en)
if (get_hard_enabled())
return;
#if defined(CONFIG_BOOKE) && defined(CONFIG_SMP)
/* Check for pending doorbell interrupts on SMP */
doorbell_exception(NULL);
#endif
/*
* Need to hard-enable interrupts here. Since currently disabled,
* no need to take further asm precautions against preemption; but