| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _ASM_IA64_XTP_H |
| 3 | #define _ASM_IA64_XTP_H |
| 4 | |
| 5 | #include <asm/io.h> |
| 6 | |
| 7 | #ifdef CONFIG_SMP |
| 8 | |
| 9 | #define XTP_OFFSET 0x1e0008 |
| 10 | |
| 11 | #define SMP_IRQ_REDIRECTION (1 << 0) |
| 12 | #define SMP_IPI_REDIRECTION (1 << 1) |
| 13 | |
| 14 | extern unsigned char smp_int_redirect; |
| 15 | |
| 16 | /* |
| 17 | * XTP control functions: |
| 18 | * min_xtp : route all interrupts to this CPU |
| 19 | * normal_xtp: nominal XTP value |
| 20 | * max_xtp : never deliver interrupts to this CPU. |
| 21 | */ |
| 22 | |
| 23 | static inline void |
| 24 | min_xtp (void) |
| 25 | { |
| 26 | if (smp_int_redirect & SMP_IRQ_REDIRECTION) |
| 27 | writeb(0x00, ipi_base_addr + XTP_OFFSET); /* XTP to min */ |
| 28 | } |
| 29 | |
| 30 | static inline void |
| 31 | normal_xtp (void) |
| 32 | { |
| 33 | if (smp_int_redirect & SMP_IRQ_REDIRECTION) |
| 34 | writeb(0x08, ipi_base_addr + XTP_OFFSET); /* XTP normal */ |
| 35 | } |
| 36 | |
| 37 | static inline void |
| 38 | max_xtp (void) |
| 39 | { |
| 40 | if (smp_int_redirect & SMP_IRQ_REDIRECTION) |
| 41 | writeb(0x0f, ipi_base_addr + XTP_OFFSET); /* Set XTP to max */ |
| 42 | } |
| 43 | |
| 44 | #endif /* CONFIG_SMP */ |
| 45 | |
| 46 | #endif /* _ASM_IA64_XTP_Hy */ |