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https://github.com/riscv-software-src/opensbi.git
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f3f4604c19
Currently, the external interrupt handling is scattered between sbi_init and sbi_trap. This patch moves all external interrupt handling into a simple framework called sbi_irqchip. Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Xiang W <wxjstz@126.com> Reviewed-by: Atish Patra <atishp@rivosinc.com>
55 lines
1.0 KiB
C
55 lines
1.0 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2022 Ventana Micro Systems Inc.
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*
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* Authors:
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* Anup Patel <apatel@ventanamicro.com>
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*/
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#include <sbi/sbi_irqchip.h>
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#include <sbi/sbi_platform.h>
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static int default_irqfn(struct sbi_trap_regs *regs)
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{
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return SBI_ENODEV;
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}
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static int (*ext_irqfn)(struct sbi_trap_regs *regs) = default_irqfn;
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void sbi_irqchip_set_irqfn(int (*fn)(struct sbi_trap_regs *regs))
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{
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if (fn)
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ext_irqfn = fn;
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}
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int sbi_irqchip_process(struct sbi_trap_regs *regs)
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{
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return ext_irqfn(regs);
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}
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int sbi_irqchip_init(struct sbi_scratch *scratch, bool cold_boot)
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{
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int rc;
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const struct sbi_platform *plat = sbi_platform_ptr(scratch);
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rc = sbi_platform_irqchip_init(plat, cold_boot);
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if (rc)
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return rc;
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if (ext_irqfn != default_irqfn)
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csr_set(CSR_MIE, MIP_MEIP);
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return 0;
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}
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void sbi_irqchip_exit(struct sbi_scratch *scratch)
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{
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const struct sbi_platform *plat = sbi_platform_ptr(scratch);
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if (ext_irqfn != default_irqfn)
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csr_clear(CSR_MIE, MIP_MEIP);
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sbi_platform_irqchip_exit(plat);
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}
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