console/post: Move cmos_post_code() under pc80/rtc

We should keep console/ somewhat arch-agnostic.

Change-Id: I4465888023ba5ae0706b5e98e541c40f975d11e3
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38186
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 143 insertions, 0 deletions

diff --git a/src/drivers/pc80/rtc/post.c b/src/drivers/pc80/rtc/post.c
new file mode 100644
index 0000000000..e559edfd1c
--- /dev/null
+++ b/src/drivers/pc80/rtc/post.c
@@ -0,0 +1,143 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <stdint.h>
+#include <elog.h>
+#include <console/console.h>
+#include <device/device.h>
+#include <pc80/mc146818rtc.h>
+#include <smp/spinlock.h>
+
+DECLARE_SPIN_LOCK(cmos_post_lock)
+
+void cmos_post_log(void)
+{
+	u8 code = 0;
+#if CONFIG(CMOS_POST_EXTRA)
+	u32 extra = 0;
+#endif
+
+	spin_lock(&cmos_post_lock);
+
+	/* Get post code from other bank */
+	switch (cmos_read(CMOS_POST_BANK_OFFSET)) {
+	case CMOS_POST_BANK_0_MAGIC:
+		code = cmos_read(CMOS_POST_BANK_1_OFFSET);
+#if CONFIG(CMOS_POST_EXTRA)
+		extra = cmos_read32(CMOS_POST_BANK_1_EXTRA);
+#endif
+		break;
+	case CMOS_POST_BANK_1_MAGIC:
+		code = cmos_read(CMOS_POST_BANK_0_OFFSET);
+#if CONFIG(CMOS_POST_EXTRA)
+		extra = cmos_read32(CMOS_POST_BANK_0_EXTRA);
+#endif
+		break;
+	}
+
+	spin_unlock(&cmos_post_lock);
+
+	/* Check last post code in previous boot against normal list */
+	switch (code) {
+	case POST_OS_BOOT:
+	case POST_OS_RESUME:
+	case POST_ENTER_ELF_BOOT:
+	case 0:
+		break;
+	default:
+		printk(BIOS_WARNING, "POST: Unexpected post code "
+		       "in previous boot: 0x%02x\n", code);
+#if CONFIG(ELOG) && (ENV_RAMSTAGE || CONFIG(ELOG_PRERAM))
+		elog_add_event_word(ELOG_TYPE_LAST_POST_CODE, code);
+#if CONFIG(CMOS_POST_EXTRA)
+		if (extra)
+			elog_add_event_dword(ELOG_TYPE_POST_EXTRA, extra);
+#endif
+#endif
+	}
+}
+
+void cmos_post_init(void)
+{
+	u8 magic = CMOS_POST_BANK_0_MAGIC;
+
+	/* Switch to the other bank */
+	switch (cmos_read(CMOS_POST_BANK_OFFSET)) {
+	case CMOS_POST_BANK_1_MAGIC:
+		break;
+	case CMOS_POST_BANK_0_MAGIC:
+		magic = CMOS_POST_BANK_1_MAGIC;
+		break;
+	default:
+		/* Initialize to zero */
+		cmos_write(0, CMOS_POST_BANK_0_OFFSET);
+		cmos_write(0, CMOS_POST_BANK_1_OFFSET);
+#if CONFIG(CMOS_POST_EXTRA)
+		cmos_write32(0, CMOS_POST_BANK_0_EXTRA);
+		cmos_write32(0, CMOS_POST_BANK_1_EXTRA);
+#endif
+	}
+
+	cmos_write(magic, CMOS_POST_BANK_OFFSET);
+}
+
+#if CONFIG(CMOS_POST_EXTRA)
+void post_log_extra(u32 value)
+{
+	spin_lock(&cmos_post_lock);
+
+	switch (cmos_read(CMOS_POST_BANK_OFFSET)) {
+	case CMOS_POST_BANK_0_MAGIC:
+		cmos_write32(value, CMOS_POST_BANK_0_EXTRA);
+		break;
+	case CMOS_POST_BANK_1_MAGIC:
+		cmos_write32(value, CMOS_POST_BANK_1_EXTRA);
+		break;
+	}
+
+	spin_unlock(&cmos_post_lock);
+}
+
+void post_log_path(const struct device *dev)
+{
+	if (dev) {
+		/* Encode path into lower 3 bytes */
+		u32 path = dev_path_encode(dev);
+		/* Upper byte contains the log type */
+		path |= CMOS_POST_EXTRA_DEV_PATH << 24;
+		post_log_extra(path);
+	}
+}
+
+void post_log_clear(void)
+{
+	post_log_extra(0);
+}
+#endif /* CONFIG_CMOS_POST_EXTRA */
+
+void cmos_post_code(u8 value)
+{
+	spin_lock(&cmos_post_lock);
+
+	switch (cmos_read(CMOS_POST_BANK_OFFSET)) {
+	case CMOS_POST_BANK_0_MAGIC:
+		cmos_write(value, CMOS_POST_BANK_0_OFFSET);
+		break;
+	case CMOS_POST_BANK_1_MAGIC:
+		cmos_write(value, CMOS_POST_BANK_1_OFFSET);
+		break;
+	}
+
+	spin_unlock(&cmos_post_lock);
+}