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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_console.h>
#include <sbi/sbi_ecall.h>
#include <sbi/sbi_ecall_interface.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_hsm.h>
#include <sbi/sbi_ipi.h>
#include <sbi/sbi_scratch.h>
#include <sbi/sbi_system.h>
#include <sbi/sbi_timer.h>
#include <sbi/sbi_tlb.h>
#include <sbi/sbi_trap.h>
#include <sbi/sbi_unpriv.h>
#include <sbi/sbi_hart.h>
static int sbi_load_hart_mask_unpriv(ulong *pmask, ulong *hmask,
struct sbi_trap_info *uptrap)
{
ulong mask = 0;
if (pmask) {
mask = sbi_load_ulong(pmask, uptrap);
if (uptrap->cause)
return SBI_ETRAP;
} else {
sbi_hsm_hart_started_mask(0, &mask);
}
*hmask = mask;
return 0;
}
static int sbi_ecall_legacy_handler(unsigned long extid, unsigned long funcid,
unsigned long *args, unsigned long *out_val,
struct sbi_trap_info *out_trap)
{
int ret = 0;
struct sbi_tlb_info tlb_info;
u32 source_hart = current_hartid();
struct sbi_scratch *scratch = sbi_scratch_thishart_ptr();
ulong hmask = 0;
switch (extid) {
case SBI_EXT_0_1_SET_TIMER:
#if __riscv_xlen == 32
sbi_timer_event_start(scratch,
(((u64)args[1] << 32) | (u64)args[0]));
#else
sbi_timer_event_start(scratch, (u64)args[0]);
#endif
break;
case SBI_EXT_0_1_CONSOLE_PUTCHAR:
sbi_putc(args[0]);
break;
case SBI_EXT_0_1_CONSOLE_GETCHAR:
ret = sbi_getc();
break;
case SBI_EXT_0_1_CLEAR_IPI:
sbi_ipi_clear_smode(scratch);
break;
case SBI_EXT_0_1_SEND_IPI:
ret = sbi_load_hart_mask_unpriv((ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP)
ret = sbi_ipi_send_smode(scratch, hmask, 0);
break;
case SBI_EXT_0_1_REMOTE_FENCE_I:
ret = sbi_load_hart_mask_unpriv((ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP) {
SBI_TLB_INFO_INIT(&tlb_info, 0, 0, 0,
SBI_ITLB_FLUSH, source_hart);
ret = sbi_tlb_request(scratch, hmask, 0, &tlb_info);
}
break;
case SBI_EXT_0_1_REMOTE_SFENCE_VMA:
ret = sbi_load_hart_mask_unpriv((ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP) {
SBI_TLB_INFO_INIT(&tlb_info, args[1], args[2], 0,
SBI_TLB_FLUSH_VMA, source_hart);
ret = sbi_tlb_request(scratch, hmask, 0, &tlb_info);
}
break;
case SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID:
ret = sbi_load_hart_mask_unpriv((ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP) {
SBI_TLB_INFO_INIT(&tlb_info, args[1], args[2], args[3],
SBI_TLB_FLUSH_VMA_ASID, source_hart);
ret = sbi_tlb_request(scratch, hmask, 0, &tlb_info);
}
break;
case SBI_EXT_0_1_SHUTDOWN:
sbi_system_shutdown(scratch, 0);
break;
default:
ret = SBI_ENOTSUPP;
};
return ret;
}
struct sbi_ecall_extension ecall_legacy = {
.extid_start = SBI_EXT_0_1_SET_TIMER,
.extid_end = SBI_EXT_0_1_SHUTDOWN,
.handle = sbi_ecall_legacy_handler,
};
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