From 1364d5adb291ecf7471db571956545f592a5a615 Mon Sep 17 00:00:00 2001 From: Andrew Jones Date: Mon, 27 Feb 2023 11:30:56 +0100 Subject: lib: sbi_hsm: Factor out invalid state detection Remove some redundant code by creating an invalid state detection macro. No functional change intended. Signed-off-by: Andrew Jones Reviewed-by: Anup Patel --- lib/sbi/sbi_hsm.c | 65 ++++++++++++++++++++----------------------------------- 1 file changed, 24 insertions(+), 41 deletions(-) diff --git a/lib/sbi/sbi_hsm.c b/lib/sbi/sbi_hsm.c index 8499bb1..b71ee6b 100644 --- a/lib/sbi/sbi_hsm.c +++ b/lib/sbi/sbi_hsm.c @@ -26,6 +26,15 @@ #include #include +#define __sbi_hsm_hart_change_state(hdata, oldstate, newstate) \ +({ \ + long state = atomic_cmpxchg(&(hdata)->state, oldstate, newstate); \ + if (state != (oldstate)) \ + sbi_printf("%s: ERR: The hart is in invalid state [%lu]\n", \ + __func__, state); \ + state == (oldstate); \ +}) + static const struct sbi_hsm_device *hsm_dev = NULL; static unsigned long hart_data_offset; @@ -95,13 +104,11 @@ int sbi_hsm_hart_interruptible_mask(const struct sbi_domain *dom, void sbi_hsm_prepare_next_jump(struct sbi_scratch *scratch, u32 hartid) { - u32 oldstate; struct sbi_hsm_data *hdata = sbi_scratch_offset_ptr(scratch, hart_data_offset); - oldstate = atomic_cmpxchg(&hdata->state, SBI_HSM_STATE_START_PENDING, - SBI_HSM_STATE_STARTED); - if (oldstate != SBI_HSM_STATE_START_PENDING) + if (!__sbi_hsm_hart_change_state(hdata, SBI_HSM_STATE_START_PENDING, + SBI_HSM_STATE_STARTED)) sbi_hart_hang(); } @@ -217,14 +224,12 @@ int sbi_hsm_init(struct sbi_scratch *scratch, u32 hartid, bool cold_boot) void __noreturn sbi_hsm_exit(struct sbi_scratch *scratch) { - u32 hstate; struct sbi_hsm_data *hdata = sbi_scratch_offset_ptr(scratch, hart_data_offset); void (*jump_warmboot)(void) = (void (*)(void))scratch->warmboot_addr; - hstate = atomic_cmpxchg(&hdata->state, SBI_HSM_STATE_STOP_PENDING, - SBI_HSM_STATE_STOPPED); - if (hstate != SBI_HSM_STATE_STOP_PENDING) + if (!__sbi_hsm_hart_change_state(hdata, SBI_HSM_STATE_STOP_PENDING, + SBI_HSM_STATE_STOPPED)) goto fail_exit; if (hsm_device_has_hart_hotplug()) { @@ -298,7 +303,6 @@ int sbi_hsm_hart_start(struct sbi_scratch *scratch, int sbi_hsm_hart_stop(struct sbi_scratch *scratch, bool exitnow) { - int oldstate; const struct sbi_domain *dom = sbi_domain_thishart_ptr(); struct sbi_hsm_data *hdata = sbi_scratch_offset_ptr(scratch, hart_data_offset); @@ -306,13 +310,9 @@ int sbi_hsm_hart_stop(struct sbi_scratch *scratch, bool exitnow) if (!dom) return SBI_EFAIL; - oldstate = atomic_cmpxchg(&hdata->state, SBI_HSM_STATE_STARTED, - SBI_HSM_STATE_STOP_PENDING); - if (oldstate != SBI_HSM_STATE_STARTED) { - sbi_printf("%s: ERR: The hart is in invalid state [%u]\n", - __func__, oldstate); + if (!__sbi_hsm_hart_change_state(hdata, SBI_HSM_STATE_STARTED, + SBI_HSM_STATE_STOP_PENDING)) return SBI_EFAIL; - } if (exitnow) sbi_exit(scratch); @@ -362,36 +362,26 @@ static void __sbi_hsm_suspend_non_ret_restore(struct sbi_scratch *scratch) void sbi_hsm_hart_resume_start(struct sbi_scratch *scratch) { - int oldstate; struct sbi_hsm_data *hdata = sbi_scratch_offset_ptr(scratch, hart_data_offset); /* If current HART was SUSPENDED then set RESUME_PENDING state */ - oldstate = atomic_cmpxchg(&hdata->state, SBI_HSM_STATE_SUSPENDED, - SBI_HSM_STATE_RESUME_PENDING); - if (oldstate != SBI_HSM_STATE_SUSPENDED) { - sbi_printf("%s: ERR: The hart is in invalid state [%u]\n", - __func__, oldstate); + if (!__sbi_hsm_hart_change_state(hdata, SBI_HSM_STATE_SUSPENDED, + SBI_HSM_STATE_RESUME_PENDING)) sbi_hart_hang(); - } hsm_device_hart_resume(); } void sbi_hsm_hart_resume_finish(struct sbi_scratch *scratch) { - u32 oldstate; struct sbi_hsm_data *hdata = sbi_scratch_offset_ptr(scratch, hart_data_offset); /* If current HART was RESUME_PENDING then set STARTED state */ - oldstate = atomic_cmpxchg(&hdata->state, SBI_HSM_STATE_RESUME_PENDING, - SBI_HSM_STATE_STARTED); - if (oldstate != SBI_HSM_STATE_RESUME_PENDING) { - sbi_printf("%s: ERR: The hart is in invalid state [%u]\n", - __func__, oldstate); + if (!__sbi_hsm_hart_change_state(hdata, SBI_HSM_STATE_RESUME_PENDING, + SBI_HSM_STATE_STARTED)) sbi_hart_hang(); - } /* * Restore some of the M-mode CSRs which we are re-configured by @@ -403,7 +393,7 @@ void sbi_hsm_hart_resume_finish(struct sbi_scratch *scratch) int sbi_hsm_hart_suspend(struct sbi_scratch *scratch, u32 suspend_type, ulong raddr, ulong rmode, ulong arg1) { - int oldstate, ret; + int ret; const struct sbi_domain *dom = sbi_domain_thishart_ptr(); struct sbi_hsm_data *hdata = sbi_scratch_offset_ptr(scratch, hart_data_offset); @@ -437,11 +427,8 @@ int sbi_hsm_hart_suspend(struct sbi_scratch *scratch, u32 suspend_type, scratch->next_mode = rmode; /* Directly move from STARTED to SUSPENDED state */ - oldstate = atomic_cmpxchg(&hdata->state, SBI_HSM_STATE_STARTED, - SBI_HSM_STATE_SUSPENDED); - if (oldstate != SBI_HSM_STATE_STARTED) { - sbi_printf("%s: ERR: The hart is in invalid state [%u]\n", - __func__, oldstate); + if (!__sbi_hsm_hart_change_state(hdata, SBI_HSM_STATE_STARTED, + SBI_HSM_STATE_SUSPENDED)) { ret = SBI_EDENIED; goto fail_restore_state; } @@ -484,13 +471,9 @@ fail_restore_state: * We might have successfully resumed from retentive suspend * or suspend failed. In both cases, we restore state of hart. */ - oldstate = atomic_cmpxchg(&hdata->state, SBI_HSM_STATE_SUSPENDED, - SBI_HSM_STATE_STARTED); - if (oldstate != SBI_HSM_STATE_SUSPENDED) { - sbi_printf("%s: ERR: The hart is in invalid state [%u]\n", - __func__, oldstate); + if (!__sbi_hsm_hart_change_state(hdata, SBI_HSM_STATE_SUSPENDED, + SBI_HSM_STATE_STARTED)) sbi_hart_hang(); - } return ret; } -- cgit v1.2.3