---
Signed-off-by: Cade Richard <cade.richard@xxxxxxxxxxxx>
---
riscv/run | 1 +
lib/riscv/asm/sbi.h | 5 ++++
riscv/sbi.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 77 insertions(+)
diff --git a/riscv/run b/riscv/run
index 73f2bf54..e4e39d74 100755
--- a/riscv/run
+++ b/riscv/run
@@ -30,6 +30,7 @@ fi
mach='-machine virt'
command="$qemu -nodefaults -nographic -serial mon:stdio"
+
command+=" $mach $acc $firmware -cpu $processor "
command="$(migration_cmd) $(timeout_cmd) $command"
diff --git a/lib/riscv/asm/sbi.h b/lib/riscv/asm/sbi.h
index d82a384d..4ae15879 100644
--- a/lib/riscv/asm/sbi.h
+++ b/lib/riscv/asm/sbi.h
@@ -12,6 +12,11 @@
#define SBI_ERR_ALREADY_STARTED -7
#define SBI_ERR_ALREADY_STOPPED -8
+#define DBCN_WRITE_TEST_STRING "DBCN_WRITE_TEST_STRING\n"
+#define DBCN_READ_TEST_STRING "DBCN_READ_TEST_STRING\n"
+#define DBCN_WRITE_BYTE_TEST_BYTE 'a'
+#define DBCN_WRITE_TEST_BYTE_FLAG "DBCN_WRITE_TEST_CHAR: "
+
#ifndef __ASSEMBLY__
enum sbi_ext_id {
diff --git a/riscv/sbi.c b/riscv/sbi.c
index 762e9711..0fb7a300 100644
--- a/riscv/sbi.c
+++ b/riscv/sbi.c
@@ -7,6 +7,11 @@
#include <libcflat.h>
#include <stdlib.h>
#include <asm/sbi.h>
+#include <asm/csr.h>
+#include <asm/io.h>
+#include <asm/sbi.h>
+
+#define INVALID_RW_ADDR 0x0000000002000000;
static void help(void)
{
@@ -112,6 +117,72 @@ static void check_base(void)
report_prefix_pop();
}
+static void check_dbcn(void)
+{
+
+ struct sbiret ret;
+ unsigned long num_bytes, base_addr_lo, base_addr_hi;
+
+ report_prefix_push("dbcn");
+
+ ret = __base_sbi_ecall(SBI_EXT_BASE_PROBE_EXT, SBI_EXT_DBCN);
+ if (!ret.value) {
+ report_skip("DBCN extension unavailable");
+ report_prefix_pop();
+ return;
+ }
+
+ report_prefix_pop();
+
+ report_prefix_push("write");
+
+ num_bytes = strlen(DBCN_WRITE_TEST_STRING);
+ base_addr_hi = 0x0;
+ base_addr_lo = virt_to_phys((void *) &DBCN_WRITE_TEST_STRING);
+
+ do {
+ ret = __dbcn_sbi_ecall(SBI_EXT_DBCN_CONSOLE_WRITE, num_bytes, base_addr_lo, base_addr_hi);
+ } while (ret.value != num_bytes || ret.error != SBI_SUCCESS) ;
+ report(SBI_SUCCESS == ret.error, "write success");
+ report(ret.value == num_bytes, "correct number of bytes written");
+
+ base_addr_lo = INVALID_RW_ADDR;
+ ret = __dbcn_sbi_ecall(SBI_EXT_DBCN_CONSOLE_WRITE, num_bytes, base_addr_lo, base_addr_hi);
+ report(SBI_ERR_INVALID_PARAM == ret.error, "invalid parameter: address");
+
+ report_prefix_pop();
+
+ report_prefix_push("read");
+
+/* num_bytes = strlen(DBCN_READ_TEST_STRING);
+ char *actual = malloc(num_bytes);
+ base_addr_hi = 0x0;
+ base_addr_lo = virt_to_phys(( void *) actual);
+
+ do {
+ ret = __dbcn_sbi_ecall(SBI_EXT_DBCN_CONSOLE_READ, num_bytes, base_addr_lo, base_addr_hi);
+ } while (ret.value != num_bytes || ret.error != SBI_SUCCESS) ;
+ report(SBI_SUCCESS == ret.error, "read success");
+ report(ret.value == num_bytes, "correct number of bytes read");
+ report(strcmp(actual,DBCN_READ_TEST_STRING) == 0, "correct bytes read");
+*/
+ base_addr_lo = INVALID_RW_ADDR;
+ ret = __dbcn_sbi_ecall(SBI_EXT_DBCN_CONSOLE_READ, num_bytes, base_addr_lo, base_addr_hi);
+ report(SBI_ERR_INVALID_PARAM == ret.error, "invalid parameter: address");
+
+ report_prefix_pop();
+
+ report_prefix_push("write_byte");
+
+ puts(DBCN_WRITE_TEST_BYTE_FLAG);
+ ret = __dbcn_sbi_ecall(SBI_EXT_DBCN_CONSOLE_WRITE_BYTE, (u8) DBCN_WRITE_BYTE_TEST_BYTE, 0, 0);
+ puts("\n");
+ report(SBI_SUCCESS == ret.error, "write success");
+ report(0 == ret.value, "expected ret.value");
+
+ report_prefix_pop();
+}
+
int main(int argc, char **argv)
{
---
base-commit: a68956b3fb6f5f308822b20ce0ff8e02db1f7375
change-id: 20240703-sbi-dbcn-write-894334156f6f
Best regards,
--
Cade Richard <cade.richard@xxxxxxxxxxxx>
