forked from Mirrors/opensbi
12394a269b
Currently, we have fixed TLB flush types supported by the remote TLB library. This approach is not flexible and does not allow custom local TLB flush function. For example, after updating PMP entries on a set of HARTs at runtime, we have to flush TLB on these HARTs as well. To support custom local TLB flush function, we replace the "type" field of "struct sbi_tlb_info" with a local TLB flush function pointer. We also provide definitions of standard TLB flush operations (such as fence_i, sfence.vma, hfence.vvma, hfence.gvma, etc). Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
125 lines
3.0 KiB
C
125 lines
3.0 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/riscv_asm.h>
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#include <sbi/sbi_console.h>
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#include <sbi/sbi_domain.h>
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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_hsm.h>
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#include <sbi/sbi_ipi.h>
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#include <sbi/sbi_platform.h>
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#include <sbi/sbi_system.h>
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#include <sbi/sbi_timer.h>
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#include <sbi/sbi_tlb.h>
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#include <sbi/sbi_trap.h>
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#include <sbi/sbi_unpriv.h>
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#include <sbi/sbi_hart.h>
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static int sbi_load_hart_mask_unpriv(ulong *pmask, ulong *hmask,
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struct sbi_trap_info *uptrap)
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{
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ulong mask = 0;
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if (pmask) {
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mask = sbi_load_ulong(pmask, uptrap);
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if (uptrap->cause)
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return SBI_ETRAP;
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} else {
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sbi_hsm_hart_started_mask(sbi_domain_thishart_ptr(),
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0, &mask);
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}
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*hmask = mask;
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return 0;
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}
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static int sbi_ecall_legacy_handler(unsigned long extid, unsigned long funcid,
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const struct sbi_trap_regs *regs,
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unsigned long *out_val,
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struct sbi_trap_info *out_trap)
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{
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int ret = 0;
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struct sbi_tlb_info tlb_info;
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u32 source_hart = current_hartid();
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ulong hmask = 0;
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switch (extid) {
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case SBI_EXT_0_1_SET_TIMER:
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#if __riscv_xlen == 32
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sbi_timer_event_start((((u64)regs->a1 << 32) | (u64)regs->a0));
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#else
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sbi_timer_event_start((u64)regs->a0);
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#endif
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break;
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case SBI_EXT_0_1_CONSOLE_PUTCHAR:
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sbi_putc(regs->a0);
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break;
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case SBI_EXT_0_1_CONSOLE_GETCHAR:
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ret = sbi_getc();
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break;
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case SBI_EXT_0_1_CLEAR_IPI:
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sbi_ipi_clear_smode();
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break;
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case SBI_EXT_0_1_SEND_IPI:
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ret = sbi_load_hart_mask_unpriv((ulong *)regs->a0,
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&hmask, out_trap);
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if (ret != SBI_ETRAP)
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ret = sbi_ipi_send_smode(hmask, 0);
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break;
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case SBI_EXT_0_1_REMOTE_FENCE_I:
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ret = sbi_load_hart_mask_unpriv((ulong *)regs->a0,
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&hmask, out_trap);
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if (ret != SBI_ETRAP) {
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SBI_TLB_INFO_INIT(&tlb_info, 0, 0, 0, 0,
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sbi_tlb_local_fence_i,
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source_hart);
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ret = sbi_tlb_request(hmask, 0, &tlb_info);
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}
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break;
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case SBI_EXT_0_1_REMOTE_SFENCE_VMA:
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ret = sbi_load_hart_mask_unpriv((ulong *)regs->a0,
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&hmask, out_trap);
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if (ret != SBI_ETRAP) {
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SBI_TLB_INFO_INIT(&tlb_info, regs->a1, regs->a2, 0, 0,
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sbi_tlb_local_sfence_vma,
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source_hart);
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ret = sbi_tlb_request(hmask, 0, &tlb_info);
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}
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break;
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case SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID:
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ret = sbi_load_hart_mask_unpriv((ulong *)regs->a0,
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&hmask, out_trap);
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if (ret != SBI_ETRAP) {
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SBI_TLB_INFO_INIT(&tlb_info, regs->a1,
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regs->a2, regs->a3, 0,
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sbi_tlb_local_sfence_vma_asid,
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source_hart);
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ret = sbi_tlb_request(hmask, 0, &tlb_info);
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}
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break;
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case SBI_EXT_0_1_SHUTDOWN:
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sbi_system_reset(SBI_SRST_RESET_TYPE_SHUTDOWN,
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SBI_SRST_RESET_REASON_NONE);
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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_legacy = {
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.extid_start = SBI_EXT_0_1_SET_TIMER,
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.extid_end = SBI_EXT_0_1_SHUTDOWN,
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.handle = sbi_ecall_legacy_handler,
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};
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