#define INSN_MASK_WFI 0xffffff00
#define INSN_MATCH_WFI 0x10500000
+#define INSN_MASK_FENCE_TSO 0xffffffff
+#define INSN_MATCH_FENCE_TSO 0x8330000f
+
#define INSN_16BIT_MASK 0x3
#define INSN_32BIT_MASK 0x1c
*/
#include <sbi/riscv_asm.h>
+#include <sbi/riscv_barrier.h>
#include <sbi/riscv_encoding.h>
#include <sbi/sbi_bitops.h>
#include <sbi/sbi_emulate_csr.h>
return sbi_trap_redirect(regs, &trap);
}
+static int misc_mem_opcode_insn(ulong insn, struct sbi_trap_regs *regs)
+{
+ /* Errata workaround: emulate `fence.tso` as `fence rw, rw`. */
+ if ((insn & INSN_MASK_FENCE_TSO) == INSN_MATCH_FENCE_TSO) {
+ smp_mb();
+ return 0;
+ }
+
+ return truly_illegal_insn(insn, regs);
+}
+
static int system_opcode_insn(ulong insn, struct sbi_trap_regs *regs)
{
int do_write, rs1_num = (insn >> 15) & 0x1f;
truly_illegal_insn, /* 0 */
truly_illegal_insn, /* 1 */
truly_illegal_insn, /* 2 */
- truly_illegal_insn, /* 3 */
+ misc_mem_opcode_insn, /* 3 */
truly_illegal_insn, /* 4 */
truly_illegal_insn, /* 5 */
truly_illegal_insn, /* 6 */