[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH RFC 8/8] xen/arm: Some early trap logging
On 09/10/2013 03:18 PM, Ian Campbell wrote: > Not for really for application, might be useful to someone? I think it could be useful for early debugging on new platform or until init_traps initialized the correct handlers. Can you update this patch with more information about the trap (reset, undefined, ...)? > > Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx> > --- > xen/arch/arm/arm32/head.S | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/xen/arch/arm/arm32/head.S b/xen/arch/arm/arm32/head.S > index 79e95b6..06d53ad 100644 > --- a/xen/arch/arm/arm32/head.S > +++ b/xen/arch/arm/arm32/head.S > @@ -366,6 +366,9 @@ paging: > bne 1b > > launch: > + adr r0, early_trap_vector > + mcr CP32(r0, VBAR_EL2) > + > ldr r0, =init_stack /* Find the boot-time stack */ > ldr sp, [r0] > add sp, #STACK_SIZE /* (which grows down from the top). */ > @@ -376,12 +379,24 @@ launch: > beq start_xen /* and disappear into the land of C */ > b start_secondary /* (to the appropriate entry point) */ > > +trap_early: > + PRINT("\r\nEARLY TRAP\r\n") > /* Fail-stop > * r0: string explaining why */ > fail: PRINT("- Boot failed -\r\n") > 1: wfe > b 1b > > + .align 5 > +early_trap_vector: > + .word 0 /* 0x00 - Reset */ > + b trap_early /* 0x04 - Undefined Instruction */ > + b trap_early /* 0x08 - Supervisor Call */ > + b trap_early /* 0x0c - Prefetch Abort */ > + b trap_early /* 0x10 - Data Abort */ > + b trap_early /* 0x14 - Hypervisor */ > + b trap_early /* 0x18 - IRQ */ > + b trap_early /* 0x1c - FIQ */ > > #ifdef EARLY_PRINTK > /* Bring up the UART. > -- Julien Grall _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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