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lib: Implement RFENCE extension

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This patch adds RFENCE extension support in OpenSBI.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Atish Patra
2019-11-24 23:33:50 -08:00
committed by Anup Patel
parent 331ff6a162
commit 86a31f5437
1 changed files with 94 additions and 1 deletions
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95
lib/sbi/sbi_ecall.c
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@@ -67,7 +67,8 @@ int sbi_check_extension(struct sbi_scratch *scratch, unsigned long extid,
if ((extid >= SBI_EXT_0_1_SET_TIMER && extid <= SBI_EXT_0_1_SHUTDOWN) ||
(extid == SBI_EXT_BASE) ||
(extid == SBI_EXT_TIME) ||
(extid == SBI_EXT_IPI)) {
(extid == SBI_EXT_IPI) ||
(extid == SBI_EXT_RFENCE)) {
*out_val = 1;
} else if (extid >= SBI_EXT_VENDOR_START &&
extid <= SBI_EXT_VENDOR_END) {
@@ -162,6 +163,95 @@ int sbi_ecall_ipi_handler(struct sbi_scratch *scratch, unsigned long funcid,
return ret;
}
int sbi_ecall_rfence_handler(struct sbi_scratch *scratch, unsigned long funcid,
unsigned long *args, unsigned long *tval)
{
int ret = 0;
struct sbi_tlb_info tlb_info;
u32 source_hart = sbi_current_hartid();
if (funcid >= SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA &&
funcid <= SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID)
if (!misa_extension('H'))
return SBI_ENOTSUPP;
switch (funcid) {
case SBI_EXT_RFENCE_REMOTE_FENCE_I:
tlb_info.start = 0;
tlb_info.size = 0;
tlb_info.type = SBI_ITLB_FLUSH;
tlb_info.shart_mask = 1UL << source_hart;
ret = sbi_ipi_send_many(scratch, args[0], args[1],
SBI_IPI_EVENT_FENCE, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA:
tlb_info.start = (unsigned long)args[2];
tlb_info.size = (unsigned long)args[3];
tlb_info.type = SBI_TLB_FLUSH_GVMA;
tlb_info.shart_mask = 1UL << source_hart;
ret = sbi_ipi_send_many(scratch, args[0], args[1],
SBI_IPI_EVENT_FENCE, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID:
tlb_info.start = (unsigned long)args[2];
tlb_info.size = (unsigned long)args[3];
tlb_info.asid = (unsigned long)args[4];
tlb_info.type = SBI_TLB_FLUSH_GVMA_VMID;
tlb_info.shart_mask = 1UL << source_hart;
ret = sbi_ipi_send_many(scratch, args[0], args[1],
SBI_IPI_EVENT_FENCE,
&tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA:
tlb_info.start = (unsigned long)args[2];
tlb_info.size = (unsigned long)args[3];
tlb_info.type = SBI_TLB_FLUSH_VVMA;
tlb_info.shart_mask = 1UL << source_hart;
ret = sbi_ipi_send_many(scratch, args[0], args[1],
SBI_IPI_EVENT_FENCE, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID:
tlb_info.start = (unsigned long)args[2];
tlb_info.size = (unsigned long)args[3];
tlb_info.asid = (unsigned long)args[4];
tlb_info.type = SBI_TLB_FLUSH_VVMA_ASID;
tlb_info.shart_mask = 1UL << source_hart;
ret = sbi_ipi_send_many(scratch, args[0], args[1],
SBI_IPI_EVENT_FENCE,
&tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA:
tlb_info.start = (unsigned long)args[2];
tlb_info.size = (unsigned long)args[3];
tlb_info.type = SBI_TLB_FLUSH_VMA;
tlb_info.shart_mask = 1UL << source_hart;
ret = sbi_ipi_send_many(scratch, args[0], args[1],
SBI_IPI_EVENT_FENCE, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID:
tlb_info.start = (unsigned long)args[2];
tlb_info.size = (unsigned long)args[3];
tlb_info.asid = (unsigned long)args[4];
tlb_info.type = SBI_TLB_FLUSH_VMA_ASID;
tlb_info.shart_mask = 1UL << source_hart;
ret = sbi_ipi_send_many(scratch, args[0], args[1],
SBI_IPI_EVENT_FENCE,
&tlb_info);
break;
default:
ret = SBI_ENOTSUPP;
};
return ret;
}
int sbi_ecall_0_1_handler(struct sbi_scratch *scratch, unsigned long extid,
unsigned long *args, struct sbi_trap_info *out_trap)
{
@@ -273,6 +363,9 @@ int sbi_ecall_handler(u32 hartid, ulong mcause, struct sbi_trap_regs *regs,
ret = sbi_ecall_time_handler(scratch, func_id, args);
else if (extension_id == SBI_EXT_IPI)
ret = sbi_ecall_ipi_handler(scratch, func_id, args, &out_val);
else if (extension_id == SBI_EXT_RFENCE)
ret = sbi_ecall_rfence_handler(scratch, func_id,
args, &out_val);
else if (extension_id >= SBI_EXT_VENDOR_START &&
extension_id <= SBI_EXT_VENDOR_END) {
ret = sbi_ecall_vendor_ext_handler(scratch, extension_id,