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3284bea833
Some of the upcoming SBI extensions (such as SSE) will directly update register state so improve the prototype of ecall handler to accommodate this. Further, this flexibility allows us to push the trap redirection from sbi_ecall_handler() to the sbi_ecall_legacy_handler(). Signed-off-by: Anup Patel <apatel@ventanamicro.com>
53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2020 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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* Atish Patra <atish.patra@wdc.com>
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*/
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#include <sbi/sbi_ecall.h>
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#include <sbi/sbi_ecall_interface.h>
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#include <sbi/sbi_error.h>
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#include <sbi/sbi_platform.h>
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#include <sbi/sbi_trap.h>
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#include <sbi/riscv_asm.h>
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static inline unsigned long sbi_ecall_vendor_id(void)
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{
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return SBI_EXT_VENDOR_START +
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(csr_read(CSR_MVENDORID) &
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(SBI_EXT_VENDOR_END - SBI_EXT_VENDOR_START));
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}
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static int sbi_ecall_vendor_handler(unsigned long extid, unsigned long funcid,
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struct sbi_trap_regs *regs,
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struct sbi_ecall_return *out)
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{
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return sbi_platform_vendor_ext_provider(sbi_platform_thishart_ptr(),
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funcid, regs, out);
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}
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struct sbi_ecall_extension ecall_vendor;
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static int sbi_ecall_vendor_register_extensions(void)
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{
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unsigned long extid = sbi_ecall_vendor_id();
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if (!sbi_platform_vendor_ext_check(sbi_platform_thishart_ptr()))
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return 0;
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ecall_vendor.extid_start = extid;
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ecall_vendor.extid_end = extid;
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return sbi_ecall_register_extension(&ecall_vendor);
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}
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struct sbi_ecall_extension ecall_vendor = {
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.extid_start = SBI_EXT_VENDOR_START,
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.extid_end = SBI_EXT_VENDOR_END,
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.register_extensions = sbi_ecall_vendor_register_extensions,
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.handle = sbi_ecall_vendor_handler,
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};
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