Messages in this thread | | | Date | Thu, 12 Feb 2015 21:34:47 +0100 | Subject | Re: [PATCH 02/14] ARM: ARMv7M: Enlarge vector table to 256 entries | From | Geert Uytterhoeven <> |
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On Thu, Feb 12, 2015 at 6:45 PM, Maxime Coquelin <mcoquelin.stm32@gmail.com> wrote: > From Cortex-M4 and M7 reference manuals, the nvic supports up to 240 > interrupts. So the number of entries in vectors table is 256. > > This patch adds the missing entries, and change the alignement, so that > vector_table remains naturally aligned.
Shouldn't this depend on ARCH_STM32, or some other M4 or M7 specific Kconfig option, to avoid wasting the space on other CPUs?
> > Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com> > --- > arch/arm/kernel/entry-v7m.S | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > > diff --git a/arch/arm/kernel/entry-v7m.S b/arch/arm/kernel/entry-v7m.S > index 8944f49..29a461b 100644 > --- a/arch/arm/kernel/entry-v7m.S > +++ b/arch/arm/kernel/entry-v7m.S > @@ -117,9 +117,9 @@ ENTRY(__switch_to) > ENDPROC(__switch_to) > > .data > - .align 8 > + .align 10 > /* > - * Vector table (64 words => 256 bytes natural alignment) > + * Vector table (256 words => 1024 bytes alignment) > */ > ENTRY(vector_table) > .long 0 @ 0 - Reset stack pointer > @@ -138,6 +138,6 @@ ENTRY(vector_table) > .long __invalid_entry @ 13 - Reserved > .long __pendsv_entry @ 14 - PendSV > .long __invalid_entry @ 15 - SysTick > - .rept 64 - 16 > - .long __irq_entry @ 16..64 - External Interrupts > + .rept 256 - 16 > + .long __irq_entry @ 16..256 - External Interrupts > .endr > -- > 1.9.1
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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