eenurkka commented on code in PR #6304:
URL: https://github.com/apache/incubator-nuttx/pull/6304#discussion_r877906705
##########
arch/risc-v/src/mpfs/mpfs_opensbi.c:
##########
@@ -499,6 +517,72 @@ static void mpfs_opensbi_pmp_setup(void)
csr_write(pmpcfg2, 0);
}
+/****************************************************************************
+ * Name: mpfs_opensbi_vendor_ext_check
+ *
+ * Description:
+ * Used by the OpenSBI in vendor probe to check the vendor ID.
+ *
+ * Input Parameters:
+ * extid - hart number to be prepared
+ *
+ * Returned Value:
+ * 1 on match, zero if not
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_MPFS_IHC
+static int mpfs_opensbi_vendor_ext_check(long extid)
+{
+ return (SBI_EXT_MICROCHIP_TECHNOLOGY == extid);
+}
+
+/****************************************************************************
+ * Name: mpfs_opensbi_ecall_handler
+ *
+ * Description:
+ * Used by the S-mode kernel such as Linux to perform M-mode ecall actions
+ * related to Inter-Hart Communication (IHC).
+ *
+ * Input Parameters:
+ * extid - Vendor ID
+ * funcid - One of the valid functions
+ * sbi_trap_regs - SBI trap registers
+ * out_val - Error code location
+ * out_trap - Trap registers such as epc, unused
+ *
+ * Returned Value:
+ * 0 always
+ *
+ ****************************************************************************/
+
+static int mpfs_opensbi_ecall_handler(long extid, long funcid,
+ const struct sbi_trap_regs *regs,
+ unsigned long *out_val,
+ struct sbi_trap_info *out_trap)
+{
+ uint32_t remote_channel = (uint32_t)regs->a0;
+ uint32_t *message_ptr = (uint32_t *)regs->a1;
+ int result = 0;
+
+ switch (funcid)
+ {
+ case SBI_EXT_IHC_CTX_INIT:
+ case SBI_EXT_IHC_SEND:
+ case SBI_EXT_IHC_RECEIVE:
+ result = mpfs_ihc_sbi_ecall_handler(funcid, remote_channel,
+ message_ptr);
+ break;
+ default:
Review Comment:
pushed new with fixes
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