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platform: implement K210 system reset

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Implement rebooting the K210 via the system reset extension.

All reset types are treated in the same way.
A request for shutdown results in a reboot.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Heinrich Schuchardt
2021-02-26 09:25:10 +00:00
committed by Anup Patel
parent 234ed8e427
commit ec5274b04c
2 changed files with 28 additions and 0 deletions
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19
platform/kendryte/k210/platform.c
View File

@@ -129,6 +129,22 @@ 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 = {
.final_init = k210_final_init,
@@ -142,6 +158,9 @@ const struct sbi_platform_operations platform_ops = {
.ipi_send = clint_ipi_send,
.ipi_clear = clint_ipi_clear,
.system_reset_check = k210_system_reset_check,
.system_reset = k210_system_reset,
.timer_init = k210_timer_init,
.timer_value = clint_timer_value,
.timer_event_stop = clint_timer_event_stop,

9
platform/kendryte/k210/platform.h
View File

@@ -27,10 +27,19 @@
/* Registers */
#define K210_PLL0 0x08
#define K210_CLKSEL0 0x20
#define K210_RESET 0x30
/* Register bit masks */
#define K210_RESET_MASK 0x01
static inline u32 k210_read_sysreg(u32 reg)
{
return readl((volatile void *)(K210_SYSCTL_BASE_ADDR + reg));
}
static inline void k210_write_sysreg(u32 val, u32 reg)
{
writel(val, (volatile void *)(K210_SYSCTL_BASE_ADDR + reg));
}
#endif /* _K210_PLATFORM_H_ */