lib: utils/hsm: factor out ATCSMU code into an HSM driver

Refactor ATCSMU (System Management Unit) support by moving it from a
system utility into a dedicated FDT-based HSM driver.

Key changes include:

- Moving the functions in lib/utils/sys/atcsmu.c into the new HSM driver
- Moving hart start and stop operations on AE350 platform into the new
  HSM driver
- Converting the assembly-based functions in sleep.S to C code for the
  readability
- Updating the ATCWDT200 driver

Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
Signed-off-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Link: https://lore.kernel.org/r/20251229071914.1451587-2-ben717@andestech.com
Signed-off-by: Anup Patel <anup@brainfault.org>

2 files changed, 49 insertions, 59 deletions

diff --git a/include/sbi_utils/hsm/fdt_hsm_andes_atcsmu.h b/include/sbi_utils/hsm/fdt_hsm_andes_atcsmu.h
new file mode 100644
index 0000000..881d8b2
--- /dev/null
+++ b/include/sbi_utils/hsm/fdt_hsm_andes_atcsmu.h
@@ -0,0 +1,49 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2025 Andes Technology Corporation
+ */
+
+#ifndef __FDT_HSM_ANDES_ATCSMU_H__
+#define __FDT_HSM_ANDES_ATCSMU_H__
+
+#include <sbi/sbi_types.h>
+
+/* clang-format off */
+
+#define RESET_VEC_LO_OFFSET		0x50
+#define RESET_VEC_HI_OFFSET		0x60
+#define RESET_VEC_8CORE_OFFSET		0x1a0
+#define HARTn_RESET_VEC_LO(n)		(RESET_VEC_LO_OFFSET + \
+					((n) < 4 ? 0 : RESET_VEC_8CORE_OFFSET) + \
+					((n) * 0x4))
+#define HARTn_RESET_VEC_HI(n)		(RESET_VEC_HI_OFFSET + \
+					((n) < 4 ? 0 : RESET_VEC_8CORE_OFFSET) + \
+					((n) * 0x4))
+
+#define PCS0_CFG_OFFSET			0x80
+#define PCSm_CFG_OFFSET(i)		((i + 3) * 0x20 + PCS0_CFG_OFFSET)
+#define PCS_CFG_LIGHT_SLEEP		BIT(2)
+#define PCS_CFG_DEEP_SLEEP		BIT(3)
+
+#define PCS0_SCRATCH_OFFSET		0x84
+#define PCSm_SCRATCH_OFFSET(i)		((i + 3) * 0x20 + PCS0_SCRATCH_OFFSET)
+
+#define PCS0_WE_OFFSET			0x90
+#define PCSm_WE_OFFSET(i)		((i + 3) * 0x20 + PCS0_WE_OFFSET)
+
+#define PCS0_CTL_OFFSET			0x94
+#define PCSm_CTL_OFFSET(i)		((i + 3) * 0x20 + PCS0_CTL_OFFSET)
+#define LIGHT_SLEEP_CMD			0x3
+#define WAKEUP_CMD			0x8
+#define DEEP_SLEEP_CMD			0xb
+
+/* clang-format on */
+
+void atcsmu_set_wakeup_events(u32 events, u32 hartid);
+bool atcsmu_support_sleep_mode(u32 sleep_type, u32 hartid);
+void atcsmu_set_command(u32 pcs_ctl, u32 hartid);
+int atcsmu_set_reset_vector(u64 wakeup_addr, u32 hartid);
+u32 atcsmu_get_sleep_type(u32 hartid);
+
+#endif
diff --git a/include/sbi_utils/sys/atcsmu.h b/include/sbi_utils/sys/atcsmu.h
deleted file mode 100644
index 07be22e..0000000
--- a/include/sbi_utils/sys/atcsmu.h
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 2023 Andes Technology Corporation
- */
-
-#ifndef _SYS_ATCSMU_H
-#define _SYS_ATCSMU_H
-
-#include <sbi/sbi_types.h>
-
-/* clang-format off */
-
-#define PCS0_WE_OFFSET		0x90
-#define PCSm_WE_OFFSET(i)	((i + 3) * 0x20 + PCS0_WE_OFFSET)
-
-#define PCS0_CTL_OFFSET		0x94
-#define PCSm_CTL_OFFSET(i)	((i + 3) * 0x20 + PCS0_CTL_OFFSET)
-#define PCS_CTL_CMD_SHIFT	0
-#define PCS_CTL_PARAM_SHIFT	3
-#define SLEEP_CMD		0x3
-#define WAKEUP_CMD		(0x0 | (1 << PCS_CTL_PARAM_SHIFT))
-#define LIGHTSLEEP_MODE		0
-#define DEEPSLEEP_MODE		1
-#define LIGHT_SLEEP_CMD		(SLEEP_CMD | (LIGHTSLEEP_MODE << PCS_CTL_PARAM_SHIFT))
-#define DEEP_SLEEP_CMD		(SLEEP_CMD | (DEEPSLEEP_MODE << PCS_CTL_PARAM_SHIFT))
-
-#define PCS0_CFG_OFFSET			0x80
-#define PCSm_CFG_OFFSET(i)		((i + 3) * 0x20 + PCS0_CFG_OFFSET)
-#define PCS_CFG_LIGHT_SLEEP_SHIFT	2
-#define PCS_CFG_LIGHT_SLEEP		(1 << PCS_CFG_LIGHT_SLEEP_SHIFT)
-#define PCS_CFG_DEEP_SLEEP_SHIFT	3
-#define PCS_CFG_DEEP_SLEEP		(1 << PCS_CFG_DEEP_SLEEP_SHIFT)
-
-#define RESET_VEC_LO_OFFSET	0x50
-#define RESET_VEC_HI_OFFSET	0x60
-#define RESET_VEC_8CORE_OFFSET	0x1a0
-#define HARTn_RESET_VEC_LO(n)	(RESET_VEC_LO_OFFSET + \
-			        ((n) < 4 ? 0 : RESET_VEC_8CORE_OFFSET) + \
-			        ((n) * 0x4))
-#define HARTn_RESET_VEC_HI(n)	(RESET_VEC_HI_OFFSET + \
-			        ((n) < 4 ? 0 : RESET_VEC_8CORE_OFFSET) + \
-			        ((n) * 0x4))
-
-#define PCS_MAX_NR  8
-#define FLASH_BASE  0x80000000ULL
-
-/* clang-format on */
-
-struct smu_data {
-	unsigned long addr;
-};
-
-int smu_set_wakeup_events(struct smu_data *smu, u32 events, u32 hartid);
-bool smu_support_sleep_mode(struct smu_data *smu, u32 sleep_mode, u32 hartid);
-int smu_set_command(struct smu_data *smu, u32 pcs_ctl, u32 hartid);
-int smu_set_reset_vector(struct smu_data *smu, ulong wakeup_addr, u32 hartid);
-
-#endif /* _SYS_ATCSMU_H */