forked from Mirrors/opensbi
e67d91cdcc
Implement the SBI MPXY extension which provides an SBI interface to the supervisor software for send messages via MPXY framework. Signed-off-by: Rahul Pathak <rpathak@ventanamicro.com> Co-developed-by: Anup Patel <apatel@ventanamicro.com> Signed-off-by: Anup Patel <apatel@ventanamicro.com>
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2024 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_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_trap.h>
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#include <sbi/sbi_mpxy.h>
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static int sbi_ecall_mpxy_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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int ret = 0;
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switch (funcid) {
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case SBI_EXT_MPXY_SET_SHMEM:
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ret = sbi_mpxy_set_shmem(regs->a0, regs->a1, regs->a2, regs->a3);
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break;
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case SBI_EXT_MPXY_GET_CHANNEL_IDS:
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ret = sbi_mpxy_get_channel_ids(regs->a0);
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break;
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case SBI_EXT_MPXY_READ_ATTRS:
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ret = sbi_mpxy_read_attrs(regs->a0, regs->a1, regs->a2);
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break;
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case SBI_EXT_MPXY_WRITE_ATTRS:
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ret = sbi_mpxy_write_attrs(regs->a0, regs->a1, regs->a2);
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break;
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case SBI_EXT_MPXY_SEND_MSG_WITH_RESP:
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ret = sbi_mpxy_send_message(regs->a0, regs->a1,
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regs->a2, &out->value);
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break;
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case SBI_EXT_MPXY_SEND_MSG_NO_RESP:
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ret = sbi_mpxy_send_message(regs->a0, regs->a1, regs->a2,
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NULL);
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break;
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case SBI_EXT_MPXY_GET_NOTIFICATION_EVENTS:
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ret = sbi_mpxy_get_notification_events(regs->a0, &out->value);
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break;
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default:
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ret = SBI_ENOTSUPP;
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}
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return ret;
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}
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struct sbi_ecall_extension ecall_mpxy;
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static int sbi_ecall_mpxy_register_extensions(void)
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{
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if (!sbi_mpxy_channel_available())
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return 0;
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return sbi_ecall_register_extension(&ecall_mpxy);
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}
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struct sbi_ecall_extension ecall_mpxy = {
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.extid_start = SBI_EXT_MPXY,
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.extid_end = SBI_EXT_MPXY,
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.register_extensions = sbi_ecall_mpxy_register_extensions,
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.handle = sbi_ecall_mpxy_handler,
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};
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