mirror of
https://github.com/riscv-software-src/opensbi.git
synced 2025-08-24 23:41:23 +01:00
2dd6eaf680
Currently, each platform keeps track of which irqchip driver is in use and calls its warm init function. Since the generic platform may use multiple irqchip drivers, it has logic to track an array of drivers. The code is simplified and made common across platforms by treating warm init and exit as properties of the driver, not the platform. Then the platform's only role is to select and prepare a driver during cold boot. For now, only add a .warm_init hook, since none of the existing drivers need an .exit hook. It could be added in the future if needed. Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org>
72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
/*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2022 Ventana Micro Systems Inc.
|
|
*
|
|
* Authors:
|
|
* Anup Patel <apatel@ventanamicro.com>
|
|
*/
|
|
|
|
#include <sbi/sbi_irqchip.h>
|
|
#include <sbi/sbi_list.h>
|
|
#include <sbi/sbi_platform.h>
|
|
|
|
static SBI_LIST_HEAD(irqchip_list);
|
|
|
|
static int default_irqfn(void)
|
|
{
|
|
return SBI_ENODEV;
|
|
}
|
|
|
|
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();
|
|
}
|
|
|
|
void sbi_irqchip_add_device(struct sbi_irqchip_device *dev)
|
|
{
|
|
sbi_list_add_tail(&dev->node, &irqchip_list);
|
|
}
|
|
|
|
int sbi_irqchip_init(struct sbi_scratch *scratch, bool cold_boot)
|
|
{
|
|
int rc;
|
|
const struct sbi_platform *plat = sbi_platform_ptr(scratch);
|
|
struct sbi_irqchip_device *dev;
|
|
|
|
rc = sbi_platform_irqchip_init(plat, cold_boot);
|
|
if (rc)
|
|
return rc;
|
|
|
|
sbi_list_for_each_entry(dev, &irqchip_list, node) {
|
|
if (!dev->warm_init)
|
|
continue;
|
|
rc = dev->warm_init(dev);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
if (ext_irqfn != default_irqfn)
|
|
csr_set(CSR_MIE, MIP_MEIP);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void sbi_irqchip_exit(struct sbi_scratch *scratch)
|
|
{
|
|
const struct sbi_platform *plat = sbi_platform_ptr(scratch);
|
|
|
|
if (ext_irqfn != default_irqfn)
|
|
csr_clear(CSR_MIE, MIP_MEIP);
|
|
|
|
sbi_platform_irqchip_exit(plat);
|
|
}
|