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46 lines
938 B
46 lines
938 B
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_IA64_XTP_H |
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#define _ASM_IA64_XTP_H |
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#include <asm/io.h> |
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#ifdef CONFIG_SMP |
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#define XTP_OFFSET 0x1e0008 |
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#define SMP_IRQ_REDIRECTION (1 << 0) |
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#define SMP_IPI_REDIRECTION (1 << 1) |
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extern unsigned char smp_int_redirect; |
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/* |
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* XTP control functions: |
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* min_xtp : route all interrupts to this CPU |
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* normal_xtp: nominal XTP value |
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* max_xtp : never deliver interrupts to this CPU. |
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*/ |
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static inline void |
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min_xtp (void) |
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{ |
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if (smp_int_redirect & SMP_IRQ_REDIRECTION) |
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writeb(0x00, ipi_base_addr + XTP_OFFSET); /* XTP to min */ |
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} |
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static inline void |
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normal_xtp (void) |
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{ |
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if (smp_int_redirect & SMP_IRQ_REDIRECTION) |
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writeb(0x08, ipi_base_addr + XTP_OFFSET); /* XTP normal */ |
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} |
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static inline void |
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max_xtp (void) |
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{ |
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if (smp_int_redirect & SMP_IRQ_REDIRECTION) |
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writeb(0x0f, ipi_base_addr + XTP_OFFSET); /* Set XTP to max */ |
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} |
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#endif /* CONFIG_SMP */ |
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#endif /* _ASM_IA64_XTP_Hy */
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