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| author | Maxime Coquelin stm32 <mcoquelin.stm32@gmail.com> | 2015-04-10 10:46:46 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-05-08 11:42:21 +0200 |
| commit | 6b1814cde5c79c6aa4d02c9aedc14a709c2c0737 (patch) | |
| tree | 1510cad5eb6bacd362b90a9c3124dfb9f4973a36 /arch/arm/kernel | |
| parent | Linux 4.1-rc1 (diff) | |
| download | linux-6b1814cde5c79c6aa4d02c9aedc14a709c2c0737.tar.xz linux-6b1814cde5c79c6aa4d02c9aedc14a709c2c0737.zip | |
ARM: 8340/1: ARMv7-M: Enlarge vector table up to 256 entries
From Cortex-M reference manuals, the nvic supports up to 240 interrupts.
So the number of entries in vectors table is up to 256.
This patch adds a new config flag to specify the number of external interrupts.
Some ifdeferies are added in order to respect the natural alignment without
wasting too much space on smaller systems.
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Stefan Agner <stefan@agner.ch>
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/entry-v7m.S | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/arm/kernel/entry-v7m.S b/arch/arm/kernel/entry-v7m.S index 8944f4991c3c..b6c8bb9315e7 100644 --- a/arch/arm/kernel/entry-v7m.S +++ b/arch/arm/kernel/entry-v7m.S @@ -117,9 +117,14 @@ ENTRY(__switch_to) ENDPROC(__switch_to) .data - .align 8 +#if CONFIG_CPU_V7M_NUM_IRQ <= 112 + .align 9 +#else + .align 10 +#endif + /* - * Vector table (64 words => 256 bytes natural alignment) + * Vector table (Natural alignment need to be ensured) */ ENTRY(vector_table) .long 0 @ 0 - Reset stack pointer @@ -138,6 +143,6 @@ 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 CONFIG_CPU_V7M_NUM_IRQ + .long __irq_entry @ External Interrupts .endr |