diff options
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-gic-v3.c | 57 |
1 files changed, 4 insertions, 53 deletions
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 936da87c1070..bf3df7961a5b 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -108,37 +108,7 @@ static void gic_redist_wait_for_rwp(void) gic_do_wait_for_rwp(gic_data_rdist_rd_base()); } -/* Low level accessors */ -static u64 gic_read_iar_common(void) -{ - u64 irqstat; - - asm volatile("mrs_s %0, " __stringify(ICC_IAR1_EL1) : "=r" (irqstat)); - return irqstat; -} - -/* - * Cavium ThunderX erratum 23154 - * - * The gicv3 of ThunderX requires a modified version for reading the - * IAR status to ensure data synchronization (access to icc_iar1_el1 - * is not sync'ed before and after). - */ -static u64 gic_read_iar_cavium_thunderx(void) -{ - u64 irqstat; - - asm volatile( - "nop;nop;nop;nop\n\t" - "nop;nop;nop;nop\n\t" - "mrs_s %0, " __stringify(ICC_IAR1_EL1) "\n\t" - "nop;nop;nop;nop" - : "=r" (irqstat)); - mb(); - - return irqstat; -} - +#ifdef CONFIG_ARM64 static DEFINE_STATIC_KEY_FALSE(is_cavium_thunderx); static u64 __maybe_unused gic_read_iar(void) @@ -148,28 +118,7 @@ static u64 __maybe_unused gic_read_iar(void) else return gic_read_iar_common(); } - -static void __maybe_unused gic_write_pmr(u64 val) -{ - asm volatile("msr_s " __stringify(ICC_PMR_EL1) ", %0" : : "r" (val)); -} - -static void __maybe_unused gic_write_ctlr(u64 val) -{ - asm volatile("msr_s " __stringify(ICC_CTLR_EL1) ", %0" : : "r" (val)); - isb(); -} - -static void __maybe_unused gic_write_grpen1(u64 val) -{ - asm volatile("msr_s " __stringify(ICC_GRPEN1_EL1) ", %0" : : "r" (val)); - isb(); -} - -static void __maybe_unused gic_write_sgi1r(u64 val) -{ - asm volatile("msr_s " __stringify(ICC_SGI1R_EL1) ", %0" : : "r" (val)); -} +#endif static void gic_enable_redist(bool enable) { @@ -856,8 +805,10 @@ static const struct irq_domain_ops gic_irq_domain_ops = { static void gicv3_enable_quirks(void) { +#ifdef CONFIG_ARM64 if (cpus_have_cap(ARM64_WORKAROUND_CAVIUM_23154)) static_branch_enable(&is_cavium_thunderx); +#endif } static int __init gic_of_init(struct device_node *node, struct device_node *parent) |