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arch: arm: cortex_a_r: add support for arm arch timer

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This include make possible to use the arm_arch_timer on
platform such as Cortex-A9 or Cortex-R7 which has support for
ARM Global Timer.

The global timer is a 64 bit incrementing counter, memory-mapped
in the private memory region.

Signed-off-by: Julien Massot <julien.massot@iot.bzh>
This commit is contained in:
Julien Massot 2021-01-21 15:57:25 +01:00 • committed by Anas Nashif
commit f7e3f4f2d3
4 changed files with 131 additions and 0 deletions
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drivers/timer/arm_arch_timer.c
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@ -52,6 +52,7 @@ int z_clock_driver_init(const struct device *device)
IRQ_CONNECT(ARM_ARCH_TIMER_IRQ, ARM_ARCH_TIMER_PRIO,
arm_arch_timer_compare_isr, NULL, ARM_ARCH_TIMER_FLAGS);
arm_arch_timer_init();
arm_arch_timer_set_compare(arm_arch_timer_count() + CYC_PER_TICK);
arm_arch_timer_enable(true);
irq_enable(ARM_ARCH_TIMER_IRQ);