nb/intel/sandybridge: Move IOSAV functions to separate file

Change-Id: Icbe01ec98995c3aea97bb0f4f84a938b26896fab
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47491
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

1 files changed, 46 insertions, 0 deletions

diff --git a/src/northbridge/intel/sandybridge/raminit_iosav.c b/src/northbridge/intel/sandybridge/raminit_iosav.c
new file mode 100644
index 0000000000..9ab415ab0b
--- /dev/null
+++ b/src/northbridge/intel/sandybridge/raminit_iosav.c
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <commonlib/helpers.h>
+#include <console/console.h>
+#include <delay.h>
+#include <types.h>
+
+#include "raminit_native.h"
+#include "raminit_common.h"
+#include "raminit_tables.h"
+#include "sandybridge.h"
+
+/* FIXME: no support for 3-channel chipsets */
+
+/* Number of programmed IOSAV subsequences. */
+static unsigned int ssq_count = 0;
+
+void iosav_write_ssq(const int ch, const struct iosav_ssq *ssq)
+{
+	MCHBAR32(IOSAV_n_SP_CMD_CTRL_ch(ch, ssq_count)) = ssq->sp_cmd_ctrl.raw;
+	MCHBAR32(IOSAV_n_SUBSEQ_CTRL_ch(ch, ssq_count)) = ssq->subseq_ctrl.raw;
+	MCHBAR32(IOSAV_n_SP_CMD_ADDR_ch(ch, ssq_count)) = ssq->sp_cmd_addr.raw;
+	MCHBAR32(IOSAV_n_ADDR_UPDATE_ch(ch, ssq_count)) = ssq->addr_update.raw;
+
+	ssq_count++;
+}
+
+void iosav_run_queue(const int ch, const u8 loops, const u8 as_timer)
+{
+	MCHBAR32(IOSAV_SEQ_CTL_ch(ch)) = loops | ((ssq_count - 1) << 18) | (as_timer << 22);
+
+	ssq_count = 0;
+}
+
+void iosav_run_once(const int ch)
+{
+	iosav_run_queue(ch, 1, 0);
+}
+
+void wait_for_iosav(int channel)
+{
+	while (1) {
+		if (MCHBAR32(IOSAV_STATUS_ch(channel)) & 0x50)
+			return;
+	}
+}