lib: sbi: Simplify system reset platform operations

Instead of having system_reset_check() and system_reset() callbacks in platform operations, it will be much simpler for reset driver to directly register these operations as a device to the sbi_system implementation. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
2025-08-24 23:41:23 +01:00 · 2021-04-22 11:53:32 +05:30
parent dc39c7b630
commit 043d088e39
17 changed files with 148 additions and 171 deletions
--- a/platform/generic/include/platform_override.h
+++ b/platform/generic/include/platform_override.h
@@ -20,10 +20,6 @@ struct platform_override {
 	int (*final_init)(bool cold_boot, const struct fdt_match *match);
 	void (*early_exit)(const struct fdt_match *match);
 	void (*final_exit)(const struct fdt_match *match);
-	int (*system_reset_check)(u32 reset_type, u32 reset_reason,
-				  const struct fdt_match *match);
-	void (*system_reset)(u32 reset_type, u32 reset_reason,
-			     const struct fdt_match *match);
 	int (*fdt_fixup)(void *fdt, const struct fdt_match *match);
 };

--- a/platform/generic/platform.c
+++ b/platform/generic/platform.c
@@ -184,26 +184,6 @@ static u64 generic_tlbr_flush_limit(void)
 	return SBI_PLATFORM_TLB_RANGE_FLUSH_LIMIT_DEFAULT;
 }

-static int generic_system_reset_check(u32 reset_type, u32 reset_reason)
-{
-	if (generic_plat && generic_plat->system_reset_check)
-		return generic_plat->system_reset_check(reset_type,
-							reset_reason,
-							generic_plat_match);
-	return fdt_system_reset_check(reset_type, reset_reason);
-}
-
-static void generic_system_reset(u32 reset_type, u32 reset_reason)
-{
-	if (generic_plat && generic_plat->system_reset) {
-		generic_plat->system_reset(reset_type, reset_reason,
-					   generic_plat_match);
-		return;
-	}
-
-	fdt_system_reset(reset_type, reset_reason);
-}
-
 const struct sbi_platform_operations platform_ops = {
 	.early_init		= generic_early_init,
 	.final_init		= generic_final_init,
@@ -218,8 +198,6 @@ const struct sbi_platform_operations platform_ops = {
 	.get_tlbr_flush_limit	= generic_tlbr_flush_limit,
 	.timer_init		= fdt_timer_init,
 	.timer_exit		= fdt_timer_exit,
-	.system_reset_check	= generic_system_reset_check,
-	.system_reset		= generic_system_reset,
 };

 struct sbi_platform platform = {
--- a/platform/kendryte/k210/platform.c
+++ b/platform/kendryte/k210/platform.c
@@ -12,6 +12,7 @@
 #include <sbi/sbi_console.h>
 #include <sbi/sbi_const.h>
 #include <sbi/sbi_platform.h>
+#include <sbi/sbi_system.h>
 #include <sbi_utils/fdt/fdt_fixup.h>
 #include <sbi_utils/irqchip/plic.h>
 #include <sbi_utils/serial/sifive-uart.h>
@@ -68,6 +69,36 @@ static u32 k210_get_clk_freq(void)
 	return pll0_freq / div;
 }

+static int k210_system_reset_check(u32 type, u32 reason)
+{
+	return 1;
+}
+
+static void k210_system_reset(u32 type, u32 reason)
+{
+	u32 val;
+
+	val = k210_read_sysreg(K210_RESET);
+	val |= K210_RESET_MASK;
+	k210_write_sysreg(val, K210_RESET);
+
+	while (1);
+}
+
+static struct sbi_system_reset_device k210_reset = {
+	.name = "kendryte_k210_reset",
+	.system_reset_check = k210_system_reset_check,
+	.system_reset = k210_system_reset
+};
+
+static int k210_early_init(bool cold_boot)
+{
+	if (cold_boot)
+		sbi_system_reset_set_device(&k210_reset);
+
+	return 0;
+}
+
 static int k210_final_init(bool cold_boot)
 {
 	void *fdt;
@@ -129,23 +160,9 @@ static int k210_timer_init(bool cold_boot)
 	return clint_warm_timer_init();
 }

-static int k210_system_reset_check(u32 type, u32 reason)
-{
-	return 1;
-}
-
-static void k210_system_reset(u32 type, u32 reason)
-{
-	u32 val;
-
-	val = k210_read_sysreg(K210_RESET);
-	val |= K210_RESET_MASK;
-	k210_write_sysreg(val, K210_RESET);
-
-	while (1);
-}
-
 const struct sbi_platform_operations platform_ops = {
+	.early_init	= k210_early_init,
+
 	.final_init	= k210_final_init,

 	.console_init	= k210_console_init,
@@ -154,9 +171,6 @@ const struct sbi_platform_operations platform_ops = {

 	.ipi_init  = k210_ipi_init,

-	.system_reset_check	= k210_system_reset_check,
-	.system_reset		= k210_system_reset,
-
 	.timer_init	   = k210_timer_init,
 };

--- a/platform/nuclei/ux600/platform.c
+++ b/platform/nuclei/ux600/platform.c
@@ -15,6 +15,7 @@
 #include <sbi/sbi_console.h>
 #include <sbi/sbi_const.h>
 #include <sbi/sbi_platform.h>
+#include <sbi/sbi_system.h>
 #include <sbi_utils/fdt/fdt_fixup.h>
 #include <sbi_utils/irqchip/plic.h>
 #include <sbi_utils/serial/sifive-uart.h>
@@ -104,10 +105,32 @@ static u32 ux600_get_clk_freq(void)
 	return cpu_freq;
 }

+static int ux600_system_reset_check(u32 type, u32 reason)
+{
+	return 1;
+}
+
+static void ux600_system_reset(u32 type, u32 reason)
+{
+	/* Reset system using MSFTRST register in Nuclei Timer. */
+	writel(UX600_NUCLEI_TIMER_MSFTRST_KEY, (void *)(UX600_NUCLEI_TIMER_ADDR
+					+ UX600_NUCLEI_TIMER_MSFTRST_OFS));
+	while(1);
+}
+
+static struct sbi_system_reset_device ux600_reset = {
+	.name = "nuclei_ux600_reset",
+	.system_reset_check = ux600_system_reset_check,
+	.system_reset = ux600_system_reset
+};
+
 static int ux600_early_init(bool cold_boot)
 {
 	u32 regval;

+	if (cold_boot)
+		sbi_system_reset_set_device(&ux600_reset);
+
 	/* Measure CPU Frequency using Timer */
 	ux600_clk_freq = ux600_get_clk_freq();

@@ -186,19 +209,6 @@ static int ux600_timer_init(bool cold_boot)
 	return clint_warm_timer_init();
 }

-static int ux600_system_reset_check(u32 type, u32 reason)
-{
-	return 1;
-}
-
-static void ux600_system_reset(u32 type, u32 reason)
-{
-	/* Reset system using MSFTRST register in Nuclei Timer. */
-	writel(UX600_NUCLEI_TIMER_MSFTRST_KEY, (void *)(UX600_NUCLEI_TIMER_ADDR
-					+ UX600_NUCLEI_TIMER_MSFTRST_OFS));
-	while(1);
-}
-
 const struct sbi_platform_operations platform_ops = {
 	.early_init		= ux600_early_init,
 	.final_init		= ux600_final_init,
@@ -206,8 +216,6 @@ const struct sbi_platform_operations platform_ops = {
 	.irqchip_init		= ux600_irqchip_init,
 	.ipi_init		= ux600_ipi_init,
 	.timer_init		= ux600_timer_init,
-	.system_reset_check	= ux600_system_reset_check,
-	.system_reset		= ux600_system_reset
 };

 const struct sbi_platform platform = {
--- a/platform/template/platform.c
+++ b/platform/template/platform.c
@@ -115,21 +115,6 @@ static int platform_timer_init(bool cold_boot)
 	return clint_warm_timer_init();
 }

-/*
- * Check reset type and reason supported by the platform.
- */
-static int platform_system_reset_check(u32 type, u32 reason)
-{
-	return 0;
-}
-
-/*
- * Reset the platform.
- */
-static void platform_system_reset(u32 type, u32 reason)
-{
-}
-
 /*
 * Platform descriptor.
 */
@@ -139,9 +124,7 @@ const struct sbi_platform_operations platform_ops = {
 	.console_init		= platform_console_init,
 	.irqchip_init		= platform_irqchip_init,
 	.ipi_init		= platform_ipi_init,
-	.timer_init		= platform_timer_init,
-	.system_reset_check	= platform_system_reset_check,
-	.system_reset		= platform_system_reset
+	.timer_init		= platform_timer_init
 };
 const struct sbi_platform platform = {
 	.opensbi_version	= OPENSBI_VERSION,