1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved. 7 */ 8 #ifndef _ASM_IA64_SN_PDA_H 9 #define _ASM_IA64_SN_PDA_H 10 11 #include <linux/cache.h> 12 #include <asm/percpu.h> 13 14 15 /* 16 * CPU-specific data structure. 17 * 18 * One of these structures is allocated for each cpu of a NUMA system. 19 * 20 * This structure provides a convenient way of keeping together 21 * all SN per-cpu data structures. 22 */ 23 24 typedef struct pda_s { 25 26 /* 27 * Support for SN LEDs 28 */ 29 volatile short *led_address; 30 u8 led_state; 31 u8 hb_state; /* supports blinking heartbeat leds */ 32 unsigned int hb_count; 33 34 unsigned int idle_flag; 35 36 volatile unsigned long *bedrock_rev_id; 37 volatile unsigned long *pio_write_status_addr; 38 unsigned long pio_write_status_val; 39 volatile unsigned long *pio_shub_war_cam_addr; 40 41 unsigned long sn_in_service_ivecs[4]; 42 int sn_lb_int_war_ticks; 43 int sn_last_irq; 44 int sn_first_irq; 45 } pda_t; 46 47 48 #define CACHE_ALIGN(x) (((x) + SMP_CACHE_BYTES-1) & ~(SMP_CACHE_BYTES-1)) 49 50 /* 51 * PDA 52 * Per-cpu private data area for each cpu. The PDA is located immediately after 53 * the IA64 cpu_data area. A full page is allocated for the cp_data area for each 54 * cpu but only a small amout of the page is actually used. We put the SNIA PDA 55 * in the same page as the cpu_data area. Note that there is a check in the setup 56 * code to verify that we don't overflow the page. 57 * 58 * Seems like we should should cache-line align the pda so that any changes in the 59 * size of the cpu_data area don't change cache layout. Should we align to 32, 64, 128 60 * or 512 boundary. Each has merits. For now, pick 128 but should be revisited later. 61 */ 62 DECLARE_PER_CPU(struct pda_s, pda_percpu); 63 64 #define pda (&__ia64_per_cpu_var(pda_percpu)) 65 66 #define pdacpu(cpu) (&per_cpu(pda_percpu, cpu)) 67 68 #endif /* _ASM_IA64_SN_PDA_H */ 69