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

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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>
This commit is contained in:
Ben Zong-You Xie
2025-12-29 15:19:10 +08:00
committed by Anup Patel
parent 74434f2558
commit 9ffacc8ae1
16 changed files with 302 additions and 348 deletions
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4
lib/utils/sys/Kconfig
View File

@@ -2,10 +2,6 @@
menu "System Device Support"
config SYS_ATCSMU
bool "Andes System Management Unit (SMU) support"
default n
config SYS_HTIF
bool "Host transfere interface (HTIF) support"
default n

89
lib/utils/sys/atcsmu.c
View File

@@ -1,89 +0,0 @@
/*
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2023 Andes Technology Corporation
*
* Authors:
* Yu Chien Peter Lin <peterlin@andestech.com>
*/
#include <sbi_utils/sys/atcsmu.h>
#include <sbi/riscv_io.h>
#include <sbi/sbi_console.h>
#include <sbi/sbi_error.h>
#include <sbi/sbi_bitops.h>
inline int smu_set_wakeup_events(struct smu_data *smu, u32 events, u32 hartid)
{
if (smu) {
writel(events, (void *)(smu->addr + PCSm_WE_OFFSET(hartid)));
return 0;
} else
return SBI_EINVAL;
}
inline bool smu_support_sleep_mode(struct smu_data *smu, u32 sleep_mode,
u32 hartid)
{
u32 pcs_cfg;
if (!smu) {
sbi_printf("%s(): Failed to access smu_data\n", __func__);
return false;
}
pcs_cfg = readl((void *)(smu->addr + PCSm_CFG_OFFSET(hartid)));
switch (sleep_mode) {
case LIGHTSLEEP_MODE:
if (EXTRACT_FIELD(pcs_cfg, PCS_CFG_LIGHT_SLEEP) == 0) {
sbi_printf("SMU: hart%d (PCS%d) does not support light sleep mode\n",
hartid, hartid + 3);
return false;
}
break;
case DEEPSLEEP_MODE:
if (EXTRACT_FIELD(pcs_cfg, PCS_CFG_DEEP_SLEEP) == 0) {
sbi_printf("SMU: hart%d (PCS%d) does not support deep sleep mode\n",
hartid, hartid + 3);
return false;
}
break;
}
return true;
}
inline int smu_set_command(struct smu_data *smu, u32 pcs_ctl, u32 hartid)
{
if (smu) {
writel(pcs_ctl, (void *)(smu->addr + PCSm_CTL_OFFSET(hartid)));
return 0;
} else
return SBI_EINVAL;
}
inline int smu_set_reset_vector(struct smu_data *smu, ulong wakeup_addr,
u32 hartid)
{
u32 vec_lo, vec_hi;
u64 reset_vector;
if (!smu)
return SBI_EINVAL;
writel(wakeup_addr, (void *)(smu->addr + HARTn_RESET_VEC_LO(hartid)));
writel((u64)wakeup_addr >> 32,
(void *)(smu->addr + HARTn_RESET_VEC_HI(hartid)));
vec_lo = readl((void *)(smu->addr + HARTn_RESET_VEC_LO(hartid)));
vec_hi = readl((void *)(smu->addr + HARTn_RESET_VEC_HI(hartid)));
reset_vector = ((u64)vec_hi << 32) | vec_lo;
if (reset_vector != (u64)wakeup_addr) {
sbi_printf("hart%d (PCS%d): Failed to program the reset vector.\n",
hartid, hartid + 3);
return SBI_EFAIL;
} else
return 0;
}

1
lib/utils/sys/objects.mk
View File

@@ -8,4 +8,3 @@
#
libsbiutils-objs-$(CONFIG_SYS_HTIF) += sys/htif.o
libsbiutils-objs-$(CONFIG_SYS_ATCSMU) += sys/atcsmu.o