From 516161c46f0d3c73bf6a57e551d6e2489912fc03 Mon Sep 17 00:00:00 2001
From: Nikita Shubin <n.shubin@yadro.com>
Date: Fri, 1 Oct 2021 11:31:16 +0300
Subject: lib: sbi: convert reset to list
To support different handlers for different types of resets, we are
adding a sbi_list of restart handlers.
Instead of sbi_system_reset_set_device we use
sbi_system_reset_add_device to reflect the actual meaning.
Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
---
lib/sbi/sbi_init.c | 7 +++++--
lib/sbi/sbi_system.c | 39 +++++++++++++++++++++++++--------------
2 files changed, 30 insertions(+), 16 deletions(-)
(limited to 'lib/sbi')
diff --git a/lib/sbi/sbi_init.c b/lib/sbi/sbi_init.c
index f0eb365..843659e 100644
--- a/lib/sbi/sbi_init.c
+++ b/lib/sbi/sbi_init.c
@@ -84,8 +84,11 @@ static void sbi_boot_print_general(struct sbi_scratch *scratch)
hdev = sbi_hsm_get_device();
sbi_printf("Platform HSM Device : %s\n",
(hdev) ? hdev->name : "---");
- srdev = sbi_system_reset_get_device();
- sbi_printf("Platform SysReset Device : %s\n",
+ srdev = sbi_system_reset_get_device(SBI_SRST_RESET_TYPE_COLD_REBOOT, 0);
+ sbi_printf("Platform Reboot Device : %s\n",
+ (srdev) ? srdev->name : "---");
+ srdev = sbi_system_reset_get_device(SBI_SRST_RESET_TYPE_SHUTDOWN, 0);
+ sbi_printf("Platform Shutdown Device : %s\n",
(srdev) ? srdev->name : "---");
/* Firmware details */
diff --git a/lib/sbi/sbi_system.c b/lib/sbi/sbi_system.c
index 479060b..a4e4781 100644
--- a/lib/sbi/sbi_system.c
+++ b/lib/sbi/sbi_system.c
@@ -18,28 +18,36 @@
#include <sbi/sbi_ipi.h>
#include <sbi/sbi_init.h>
-static const struct sbi_system_reset_device *reset_dev = NULL;
+static SBI_LIST_HEAD(reset_devices_list);
-const struct sbi_system_reset_device *sbi_system_reset_get_device(void)
+const struct sbi_system_reset_device *sbi_system_reset_get_device(
+ u32 reset_type, u32 reset_reason)
{
- return reset_dev;
+ struct sbi_system_reset_device *dev = 0;
+ struct sbi_dlist *pos;
+
+ /* Check each reset device registered for supported reset type */
+ sbi_list_for_each(pos, &(reset_devices_list)) {
+ dev = to_system_reset_device(pos);
+ if (dev->system_reset_check &&
+ dev->system_reset_check(reset_type, reset_reason))
+ break;
+ }
+
+ return dev;
}
-void sbi_system_reset_set_device(const struct sbi_system_reset_device *dev)
+void sbi_system_reset_add_device(struct sbi_system_reset_device *dev)
{
- if (!dev || reset_dev)
+ if (!dev || !dev->system_reset_check)
return;
- reset_dev = dev;
+ sbi_list_add(&(dev->node), &(reset_devices_list));
}
bool sbi_system_reset_supported(u32 reset_type, u32 reset_reason)
{
- if (reset_dev && reset_dev->system_reset_check &&
- reset_dev->system_reset_check(reset_type, reset_reason))
- return TRUE;
-
- return FALSE;
+ return !!sbi_system_reset_get_device(reset_type, reset_reason);
}
void __noreturn sbi_system_reset(u32 reset_type, u32 reset_reason)
@@ -62,9 +70,12 @@ void __noreturn sbi_system_reset(u32 reset_type, u32 reset_reason)
sbi_hsm_hart_stop(scratch, FALSE);
/* Platform specific reset if domain allowed system reset */
- if (dom->system_reset_allowed &&
- reset_dev && reset_dev->system_reset)
- reset_dev->system_reset(reset_type, reset_reason);
+ if (dom->system_reset_allowed) {
+ const struct sbi_system_reset_device *dev =
+ sbi_system_reset_get_device(reset_type, reset_reason);
+ if (dev)
+ dev->system_reset(reset_type, reset_reason);
+ }
/* If platform specific reset did not work then do sbi_exit() */
sbi_exit(scratch);
--
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