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lib: sbi_irqchip: Set the IRQ handler when registering a chip

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In addition to saving some code size, this moves the decision about
setting the top-level external interrupt handler to the irqchip core,
not the specific driver, which would be needed to support chained
interrupt handlers.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Samuel Holland
2024-11-04 20:10:10 -08:00
committed by Anup Patel
parent 678f5909a3
commit 111772353f
3 changed files with 7 additions and 19 deletions
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13
include/sbi/sbi_irqchip.h
View File

@@ -22,17 +22,10 @@ struct sbi_irqchip_device {
/** Initialize per-hart state for the current hart */
int (*warm_init)(struct sbi_irqchip_device *dev);
};
/**
* Set external interrupt handling function
*
* This function is called by OpenSBI platform code to set a handler for
* external interrupts
*
* @param fn function pointer for handling external irqs
*/
void sbi_irqchip_set_irqfn(int (*fn)(void));
/** Handle an IRQ from this irqchip */
int (*irq_handle)(void);
};
/**
* Process external interrupts

9
lib/sbi/sbi_irqchip.c
View File

@@ -20,12 +20,6 @@ static int default_irqfn(void)
static int (*ext_irqfn)(void) = default_irqfn;
void sbi_irqchip_set_irqfn(int (*fn)(void))
{
if (fn)
ext_irqfn = fn;
}
int sbi_irqchip_process(void)
{
return ext_irqfn();
@@ -34,6 +28,9 @@ int sbi_irqchip_process(void)
void sbi_irqchip_add_device(struct sbi_irqchip_device *dev)
{
sbi_list_add_tail(&dev->node, &irqchip_list);
if (dev->irq_handle)
ext_irqfn = dev->irq_handle;
}
int sbi_irqchip_init(struct sbi_scratch *scratch, bool cold_boot)

4
lib/utils/irqchip/imsic.c
View File

@@ -347,6 +347,7 @@ int imsic_data_check(struct imsic_data *imsic)
static struct sbi_irqchip_device imsic_device = {
.warm_init = imsic_warm_irqchip_init,
.irq_handle = imsic_external_irqfn,
};
int imsic_cold_irqchip_init(struct imsic_data *imsic)
@@ -376,9 +377,6 @@ int imsic_cold_irqchip_init(struct imsic_data *imsic)
return SBI_ENOMEM;
}
/* Setup external interrupt function for IMSIC */
sbi_irqchip_set_irqfn(imsic_external_irqfn);
/* Add IMSIC regions to the root domain */
for (i = 0; i < IMSIC_MAX_REGS && imsic->regs[i].size; i++) {
rc = sbi_domain_root_add_memrange(imsic->regs[i].addr,