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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2020 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
* Atish Patra <atish.patra@wdc.com>
*/
#include <sbi/riscv_asm.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_ecall.h>
#include <sbi/sbi_ecall_interface.h>
#include <sbi/sbi_trap.h>
#include <sbi/sbi_tlb.h>
static int sbi_ecall_rfence_handler(unsigned long extid, unsigned long funcid,
struct sbi_trap_regs *regs,
struct sbi_ecall_return *out)
{
int ret = 0;
unsigned long vmid;
struct sbi_tlb_info tlb_info;
u32 source_hart = current_hartid();
if (funcid >= SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID &&
funcid <= SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA)
if (!misa_extension('H'))
return SBI_ENOTSUPP;
switch (funcid) {
case SBI_EXT_RFENCE_REMOTE_FENCE_I:
SBI_TLB_INFO_INIT(&tlb_info, 0, 0, 0, 0,
SBI_TLB_FENCE_I, source_hart);
ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA:
SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, 0, 0,
SBI_TLB_HFENCE_GVMA, source_hart);
ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID:
SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, 0, regs->a4,
SBI_TLB_HFENCE_GVMA_VMID, source_hart);
ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA:
vmid = (csr_read(CSR_HGATP) & HGATP_VMID_MASK);
vmid = vmid >> HGATP_VMID_SHIFT;
SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, 0, vmid,
SBI_TLB_HFENCE_VVMA, source_hart);
ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID:
vmid = (csr_read(CSR_HGATP) & HGATP_VMID_MASK);
vmid = vmid >> HGATP_VMID_SHIFT;
SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, regs->a4,
vmid, SBI_TLB_HFENCE_VVMA_ASID, source_hart);
ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA:
SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, 0, 0,
SBI_TLB_SFENCE_VMA, source_hart);
ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID:
SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, regs->a4, 0,
SBI_TLB_SFENCE_VMA_ASID, source_hart);
ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
break;
default:
ret = SBI_ENOTSUPP;
}
return ret;
}
struct sbi_ecall_extension ecall_rfence;
static int sbi_ecall_rfence_register_extensions(void)
{
return sbi_ecall_register_extension(&ecall_rfence);
}
struct sbi_ecall_extension ecall_rfence = {
.extid_start = SBI_EXT_RFENCE,
.extid_end = SBI_EXT_RFENCE,
.register_extensions = sbi_ecall_rfence_register_extensions,
.handle = sbi_ecall_rfence_handler,
};
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