diff options
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/arm_arch_timer.c | 90 |
1 files changed, 41 insertions, 49 deletions
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index b5c83cc2a67a..2c02e25d1475 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -241,6 +241,38 @@ EXPORT_SYMBOL_GPL(timer_unstable_counter_workaround); DEFINE_STATIC_KEY_FALSE(arch_timer_read_ool_enabled); EXPORT_SYMBOL_GPL(arch_timer_read_ool_enabled); +static void erratum_set_next_event_tval_generic(const int access, unsigned long evt, + struct clock_event_device *clk) +{ + unsigned long ctrl; + u64 cval = evt + arch_counter_get_cntvct(); + + ctrl = arch_timer_reg_read(access, ARCH_TIMER_REG_CTRL, clk); + ctrl |= ARCH_TIMER_CTRL_ENABLE; + ctrl &= ~ARCH_TIMER_CTRL_IT_MASK; + + if (access == ARCH_TIMER_PHYS_ACCESS) + write_sysreg(cval, cntp_cval_el0); + else + write_sysreg(cval, cntv_cval_el0); + + arch_timer_reg_write(access, ARCH_TIMER_REG_CTRL, ctrl, clk); +} + +static int erratum_set_next_event_tval_virt(unsigned long evt, + struct clock_event_device *clk) +{ + erratum_set_next_event_tval_generic(ARCH_TIMER_VIRT_ACCESS, evt, clk); + return 0; +} + +static int erratum_set_next_event_tval_phys(unsigned long evt, + struct clock_event_device *clk) +{ + erratum_set_next_event_tval_generic(ARCH_TIMER_PHYS_ACCESS, evt, clk); + return 0; +} + static const struct arch_timer_erratum_workaround ool_workarounds[] = { #ifdef CONFIG_FSL_ERRATUM_A008585 { @@ -347,6 +379,9 @@ static void arch_timer_check_ool_workaround(enum arch_timer_erratum_match_type t #else #define arch_timer_check_ool_workaround(t,a) do { } while(0) +#define erratum_set_next_event_tval_virt(...) ({BUG(); 0;}) +#define erratum_set_next_event_tval_phys(...) ({BUG(); 0;}) +#define needs_unstable_timer_counter_workaround() ({false;}) #endif /* CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND */ static __always_inline irqreturn_t timer_handler(const int access, @@ -436,43 +471,12 @@ static __always_inline void set_next_event(const int access, unsigned long evt, arch_timer_reg_write(access, ARCH_TIMER_REG_CTRL, ctrl, clk); } -#ifdef CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND -static __always_inline void erratum_set_next_event_generic(const int access, - unsigned long evt, struct clock_event_device *clk) -{ - unsigned long ctrl; - u64 cval = evt + arch_counter_get_cntvct(); - - ctrl = arch_timer_reg_read(access, ARCH_TIMER_REG_CTRL, clk); - ctrl |= ARCH_TIMER_CTRL_ENABLE; - ctrl &= ~ARCH_TIMER_CTRL_IT_MASK; - - if (access == ARCH_TIMER_PHYS_ACCESS) - write_sysreg(cval, cntp_cval_el0); - else if (access == ARCH_TIMER_VIRT_ACCESS) - write_sysreg(cval, cntv_cval_el0); - - arch_timer_reg_write(access, ARCH_TIMER_REG_CTRL, ctrl, clk); -} - -static int erratum_set_next_event_virt(unsigned long evt, - struct clock_event_device *clk) -{ - erratum_set_next_event_generic(ARCH_TIMER_VIRT_ACCESS, evt, clk); - return 0; -} - -static int erratum_set_next_event_phys(unsigned long evt, - struct clock_event_device *clk) -{ - erratum_set_next_event_generic(ARCH_TIMER_PHYS_ACCESS, evt, clk); - return 0; -} -#endif /* CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND */ - static int arch_timer_set_next_event_virt(unsigned long evt, struct clock_event_device *clk) { + if (needs_unstable_timer_counter_workaround()) + return erratum_set_next_event_tval_virt(evt, clk); + set_next_event(ARCH_TIMER_VIRT_ACCESS, evt, clk); return 0; } @@ -480,6 +484,9 @@ static int arch_timer_set_next_event_virt(unsigned long evt, static int arch_timer_set_next_event_phys(unsigned long evt, struct clock_event_device *clk) { + if (needs_unstable_timer_counter_workaround()) + return erratum_set_next_event_tval_phys(evt, clk); + set_next_event(ARCH_TIMER_PHYS_ACCESS, evt, clk); return 0; } @@ -498,19 +505,6 @@ static int arch_timer_set_next_event_phys_mem(unsigned long evt, return 0; } -static void erratum_workaround_set_sne(struct clock_event_device *clk) -{ -#ifdef CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND - if (!static_branch_unlikely(&arch_timer_read_ool_enabled)) - return; - - if (arch_timer_uses_ppi == VIRT_PPI) - clk->set_next_event = erratum_set_next_event_virt; - else - clk->set_next_event = erratum_set_next_event_phys; -#endif -} - static void __arch_timer_setup(unsigned type, struct clock_event_device *clk) { @@ -541,8 +535,6 @@ static void __arch_timer_setup(unsigned type, } arch_timer_check_ool_workaround(ate_match_local_cap_id, NULL); - - erratum_workaround_set_sne(clk); } else { clk->features |= CLOCK_EVT_FEAT_DYNIRQ; clk->name = "arch_mem_timer"; |
