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lib: sbi_timer: Introduce per-HART timer state

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Currently, only time_delta is per-HART so introduce per-HART timer
state for having more per-HART timer information.

Signed-off-by: Anup Patel <anup.patel@oss.qualcomm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Link: https://lore.kernel.org/r/20260425104048.2335262-3-anup.patel@oss.qualcomm.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Anup Patel
2026-04-25 16:10:46 +05:30
committed by Anup Patel
parent d8c7dc9cb0
commit 357fae4820
1 changed files with 25 additions and 19 deletions
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lib/sbi/sbi_timer.c
+25 -19
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@@ -18,7 +18,11 @@
#include <sbi/sbi_scratch.h> #include <sbi/sbi_scratch.h>
#include <sbi/sbi_timer.h> #include <sbi/sbi_timer.h>
static unsigned long time_delta_off; struct timer_state {
u64 time_delta;
};
static unsigned long timer_state_off;
static u64 (*get_time_val)(void); static u64 (*get_time_val)(void);
static const struct sbi_timer_device *timer_dev = NULL; static const struct sbi_timer_device *timer_dev = NULL;
@@ -98,35 +102,37 @@ u64 sbi_timer_value(void)
u64 sbi_timer_virt_value(void) u64 sbi_timer_virt_value(void)
{ {
u64 *time_delta = sbi_scratch_offset_ptr(sbi_scratch_thishart_ptr(), struct timer_state *tstate = sbi_scratch_thishart_offset_ptr(timer_state_off);
time_delta_off);
return sbi_timer_value() + *time_delta; return sbi_timer_value() + tstate->time_delta;
} }
u64 sbi_timer_get_delta(void) u64 sbi_timer_get_delta(void)
{ {
u64 *time_delta = sbi_scratch_offset_ptr(sbi_scratch_thishart_ptr(), struct timer_state *tstate = sbi_scratch_thishart_offset_ptr(timer_state_off);
time_delta_off);
return *time_delta; return tstate->time_delta;
} }
void sbi_timer_set_delta(ulong delta) void sbi_timer_set_delta(ulong delta)
{ {
ulong *time_delta = sbi_scratch_offset_ptr(sbi_scratch_thishart_ptr(), struct timer_state *tstate = sbi_scratch_thishart_offset_ptr(timer_state_off);
time_delta_off);
*time_delta = delta; #if __riscv_xlen == 32
tstate->time_delta &= ~0xffffffffUL;
tstate->time_delta |= (u32)delta;
#else
tstate->time_delta = delta;
#endif
} }
#if __riscv_xlen == 32 #if __riscv_xlen == 32
void sbi_timer_set_delta_upper(ulong delta_upper) void sbi_timer_set_delta_upper(ulong delta_upper)
{ {
ulong *time_delta = sbi_scratch_offset_ptr(sbi_scratch_thishart_ptr(), struct timer_state *tstate = sbi_scratch_thishart_offset_ptr(timer_state_off);
time_delta_off);
*(time_delta + 1) = delta_upper; tstate->time_delta &= 0xffffffffUL;
tstate->time_delta |= (u64)delta_upper << 32;
} }
#endif #endif
@@ -176,13 +182,13 @@ void sbi_timer_set_device(const struct sbi_timer_device *dev)
int sbi_timer_init(struct sbi_scratch *scratch, bool cold_boot) int sbi_timer_init(struct sbi_scratch *scratch, bool cold_boot)
{ {
u64 *time_delta;
const struct sbi_platform *plat = sbi_platform_ptr(scratch); const struct sbi_platform *plat = sbi_platform_ptr(scratch);
struct timer_state *tstate;
int ret; int ret;
if (cold_boot) { if (cold_boot) {
time_delta_off = sbi_scratch_alloc_offset(sizeof(*time_delta)); timer_state_off = sbi_scratch_alloc_offset(sizeof(*tstate));
if (!time_delta_off) if (!timer_state_off)
return SBI_ENOMEM; return SBI_ENOMEM;
if (sbi_hart_has_csr(scratch, SBI_HART_CSR_TIME)) if (sbi_hart_has_csr(scratch, SBI_HART_CSR_TIME))
@@ -192,12 +198,12 @@ int sbi_timer_init(struct sbi_scratch *scratch, bool cold_boot)
if (ret) if (ret)
return ret; return ret;
} else { } else {
if (!time_delta_off) if (!timer_state_off)
return SBI_ENOMEM; return SBI_ENOMEM;
} }
time_delta = sbi_scratch_offset_ptr(scratch, time_delta_off); tstate = sbi_scratch_offset_ptr(scratch, timer_state_off);
*time_delta = 0; tstate->time_delta = 0;
if (timer_dev && timer_dev->warm_init) { if (timer_dev && timer_dev->warm_init) {
ret = timer_dev->warm_init(); ret = timer_dev->warm_init();