[RFC PATCH 1/2] lib: sbi: convert reset to list
Nikita Shubin
nikita.shubin at maquefel.me
Wed Sep 29 02:41:50 PDT 2021
From: Nikita Shubin <n.shubin at yadro.com>
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 at yadro.com>
---
include/sbi/sbi_system.h | 13 +++++++--
lib/sbi/sbi_init.c | 5 +++-
lib/sbi/sbi_system.c | 40 +++++++++++++++++----------
lib/utils/reset/fdt_reset_gpio.c | 2 +-
lib/utils/reset/fdt_reset_sunxi_wdt.c | 2 +-
lib/utils/reset/fdt_reset_thead.c | 2 +-
lib/utils/sys/htif.c | 2 +-
lib/utils/sys/sifive_test.c | 2 +-
platform/kendryte/k210/platform.c | 2 +-
platform/nuclei/ux600/platform.c | 2 +-
10 files changed, 47 insertions(+), 25 deletions(-)
diff --git a/include/sbi/sbi_system.h b/include/sbi/sbi_system.h
index a9fa546..a0bed1e 100644
--- a/include/sbi/sbi_system.h
+++ b/include/sbi/sbi_system.h
@@ -11,6 +11,7 @@
#define __SBI_SYSTEM_H__
#include <sbi/sbi_types.h>
+#include <sbi/sbi_list.h>
/** System reset hardware device */
struct sbi_system_reset_device {
@@ -22,11 +23,19 @@ struct sbi_system_reset_device {
/** Reset the system */
void (*system_reset)(u32 reset_type, u32 reset_reason);
+
+ /** List */
+ struct sbi_dlist node;
};
-const struct sbi_system_reset_device *sbi_system_reset_get_device(void);
+inline struct sbi_system_reset_device *to_system_reset_device(struct sbi_dlist *node)
+{
+ return container_of(node, struct sbi_system_reset_device, node);
+}
+
+const struct sbi_system_reset_device *sbi_system_reset_get_device(u32 reset_type, u32 reset_reason);
-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);
bool sbi_system_reset_supported(u32 reset_type, u32 reset_reason);
diff --git a/lib/sbi/sbi_init.c b/lib/sbi/sbi_init.c
index f0eb365..56a2312 100644
--- a/lib/sbi/sbi_init.c
+++ b/lib/sbi/sbi_init.c
@@ -84,9 +84,12 @@ 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();
+ srdev = sbi_system_reset_get_device(SBI_SRST_RESET_TYPE_COLD_REBOOT, 0);
sbi_printf("Platform SysReset 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 */
sbi_printf("Firmware Base : 0x%lx\n", scratch->fw_start);
diff --git a/lib/sbi/sbi_system.c b/lib/sbi/sbi_system.c
index 479060b..92bc0ac 100644
--- a/lib/sbi/sbi_system.c
+++ b/lib/sbi/sbi_system.c
@@ -18,28 +18,34 @@
#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;
+
+ 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)
@@ -48,6 +54,7 @@ void __noreturn sbi_system_reset(u32 reset_type, u32 reset_reason)
u32 cur_hartid = current_hartid();
struct sbi_domain *dom = sbi_domain_thishart_ptr();
struct sbi_scratch *scratch = sbi_scratch_thishart_ptr();
+ struct sbi_dlist *pos;
/* Send HALT IPI to every hart other than the current hart */
while (!sbi_hsm_hart_interruptible_mask(dom, hbase, &hmask)) {
@@ -61,10 +68,13 @@ void __noreturn sbi_system_reset(u32 reset_type, u32 reset_reason)
/* Stop current HART */
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);
+ /* Check each reset device registered for supported reset type */
+ sbi_list_for_each(pos, &(reset_devices_list)) {
+ struct sbi_system_reset_device *dev =
+ to_system_reset_device(pos);
+ if (dev->system_reset_check(reset_type, reset_reason))
+ dev->system_reset(reset_type, reset_reason);
+ }
/* If platform specific reset did not work then do sbi_exit() */
sbi_exit(scratch);
diff --git a/lib/utils/reset/fdt_reset_gpio.c b/lib/utils/reset/fdt_reset_gpio.c
index 77e4d0e..4da1450 100644
--- a/lib/utils/reset/fdt_reset_gpio.c
+++ b/lib/utils/reset/fdt_reset_gpio.c
@@ -115,7 +115,7 @@ static int gpio_reset_init(void *fdt, int nodeoff,
if (len > 0)
reset->inactive_delay = fdt32_to_cpu(*val);
- sbi_system_reset_set_device(&gpio_reset);
+ sbi_system_reset_add_device(&gpio_reset);
return 0;
}
diff --git a/lib/utils/reset/fdt_reset_sunxi_wdt.c b/lib/utils/reset/fdt_reset_sunxi_wdt.c
index e4f16e3..6d1b5b7 100644
--- a/lib/utils/reset/fdt_reset_sunxi_wdt.c
+++ b/lib/utils/reset/fdt_reset_sunxi_wdt.c
@@ -61,7 +61,7 @@ static int sunxi_wdt_reset_init(void *fdt, int nodeoff,
sunxi_wdt_base = (volatile void *)(unsigned long)reg_addr;
- sbi_system_reset_set_device(&sunxi_wdt_reset);
+ sbi_system_reset_add_device(&sunxi_wdt_reset);
return 0;
}
diff --git a/lib/utils/reset/fdt_reset_thead.c b/lib/utils/reset/fdt_reset_thead.c
index 9f2fe03..750b7aa 100644
--- a/lib/utils/reset/fdt_reset_thead.c
+++ b/lib/utils/reset/fdt_reset_thead.c
@@ -126,7 +126,7 @@ static int thead_reset_init(void *fdt, int nodeoff,
}
}
- sbi_system_reset_set_device(&thead_reset);
+ sbi_system_reset_add_device(&thead_reset);
return 0;
}
diff --git a/lib/utils/sys/htif.c b/lib/utils/sys/htif.c
index 330a9a6..7c69c7f 100644
--- a/lib/utils/sys/htif.c
+++ b/lib/utils/sys/htif.c
@@ -176,7 +176,7 @@ static struct sbi_system_reset_device htif_reset = {
int htif_system_reset_init(void)
{
- sbi_system_reset_set_device(&htif_reset);
+ sbi_system_reset_add_device(&htif_reset);
return 0;
}
diff --git a/lib/utils/sys/sifive_test.c b/lib/utils/sys/sifive_test.c
index 4533954..a9ebb5c 100644
--- a/lib/utils/sys/sifive_test.c
+++ b/lib/utils/sys/sifive_test.c
@@ -59,7 +59,7 @@ static struct sbi_system_reset_device sifive_test_reset = {
int sifive_test_init(unsigned long base)
{
sifive_test_base = (void *)base;
- sbi_system_reset_set_device(&sifive_test_reset);
+ sbi_system_reset_add_device(&sifive_test_reset);
return 0;
}
diff --git a/platform/kendryte/k210/platform.c b/platform/kendryte/k210/platform.c
index 35cec5f..e7caec3 100644
--- a/platform/kendryte/k210/platform.c
+++ b/platform/kendryte/k210/platform.c
@@ -108,7 +108,7 @@ static struct sbi_system_reset_device k210_reset = {
static int k210_early_init(bool cold_boot)
{
if (cold_boot)
- sbi_system_reset_set_device(&k210_reset);
+ sbi_system_reset_add_device(&k210_reset);
return 0;
}
diff --git a/platform/nuclei/ux600/platform.c b/platform/nuclei/ux600/platform.c
index 6bef4c4..6f87cf8 100644
--- a/platform/nuclei/ux600/platform.c
+++ b/platform/nuclei/ux600/platform.c
@@ -148,7 +148,7 @@ static int ux600_early_init(bool cold_boot)
u32 regval;
if (cold_boot)
- sbi_system_reset_set_device(&ux600_reset);
+ sbi_system_reset_add_device(&ux600_reset);
/* Measure CPU Frequency using Timer */
ux600_clk_freq = ux600_get_clk_freq();
--
2.31.1
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