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improve interrupt handling

This commit is contained in:
Stanislaw Kaushanski 2022-04-26 15:29:49 +02:00
parent 46f197c287
commit 02ce96eed8
2 changed files with 23 additions and 19 deletions
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raven_spn/raven_spn
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raven_spn/src/init.h
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@ -12,8 +12,8 @@ typedef void (*function_ptr_t) (void);
//! Instance data for the PLIC. //! Instance data for the PLIC.
plic_instance_t g_plic; plic_instance_t g_plic;
std::array<function_ptr_t,PLIC_NUM_INTERRUPTS> g_ext_interrupt_handlers; std::array<function_ptr_t,PLIC_NUM_INTERRUPTS> g_ext_interrupt_handlers;
bool spn1_hw_interrupt{true}; volatile bool spn1_hw_interrupt{true};
bool spn2_hw_interrupt{true}; volatile bool spn2_hw_interrupt{true};
/*! \brief external interrupt handler /*! \brief external interrupt handler
@ -45,36 +45,40 @@ void configure_irq(size_t irq_num, function_ptr_t handler, unsigned char prio=1)
} }
void wait_for_spn1_interrupt() { void wait_for_spn1_interrupt() {
// wait until HW is done clear_csr(mie, MIP_MEIP);
if(spn1_hw_interrupt) { while(spn1_hw_interrupt) {
do{ set_csr(mie, MIP_MEIP);
asm("wfi"); asm("wfi");
asm("nop"); clear_csr(mie, MIP_MEIP);
}while(spn1_hw_interrupt); asm("nop");
} }
spn1_hw_interrupt=true; spn1_hw_interrupt=true;
set_csr(mie, MIP_MEIP);
} }
void wait_for_spn2_interrupt() { void wait_for_spn2_interrupt() {
// wait until HW is done clear_csr(mie, MIP_MEIP);
if(spn2_hw_interrupt) { while(spn2_hw_interrupt) {
do{ set_csr(mie, MIP_MEIP);
asm("wfi"); asm("wfi");
asm("nop"); clear_csr(mie, MIP_MEIP);
}while(spn2_hw_interrupt); asm("nop");
} }
spn2_hw_interrupt=true; spn2_hw_interrupt=true;
set_csr(mie, MIP_MEIP);
} }
void wait_for_spn_interrupts() { void wait_for_spn_interrupts() {
if(spn1_hw_interrupt || spn2_hw_interrupt) { clear_csr(mie, MIP_MEIP);
do{ while(spn1_hw_interrupt || spn2_hw_interrupt) {
asm("wfi"); set_csr(mie, MIP_MEIP);
asm("nop"); asm("wfi");
}while(spn1_hw_interrupt || spn2_hw_interrupt); asm("nop");
clear_csr(mie, MIP_MEIP);
} }
spn1_hw_interrupt=true; spn1_hw_interrupt=true;
spn2_hw_interrupt=true; spn2_hw_interrupt=true;
set_csr(mie, MIP_MEIP);
} }
/*!\brief initializes platform /*!\brief initializes platform